# What's New In This Release

## Highlights
* Feature 1
* Feature 2
* Feature 3

## Major Changes to Core OS

   ### New Features 
 * [#3708](https://github.com/apache/incubator-nuttx/pull/#37083708) openamp: Update to 2020.10.0 official release   
 * [#3709](https://github.com/apache/incubator-nuttx/pull/#37093709) Update libcxx to 12.0.0 release  
 * [#3674](https://github.com/apache/incubator-nuttx/pull/#36743674) libc/termios: Implement TCSADRAIN and TCSAFLUSH for tcsetattr  
 * [#4595](https://github.com/apache/incubator-nuttx/pull/#45954595) libc/misc: add lib_glob  
 * [#4594](https://github.com/apache/incubator-nuttx/pull/#45944594) libc/string: add lib_strchrnul    
 * [#3672](https://github.com/apache/incubator-nuttx/pull/#36723672) include/spawn.h: Add POSIX_SPAWN_SETSID definition  
 * [#4265](https://github.com/apache/incubator-nuttx/pull/#42654265) libc: Support message catalog function  
 * [#3102](https://github.com/apache/incubator-nuttx/pull/#31023102) mm/iob: add iob_free_queue() interface  
 * [#3893](https://github.com/apache/incubator-nuttx/pull/#38933893) libs/libc/netdb: add dns clear interface  
 * [#3959](https://github.com/apache/incubator-nuttx/pull/#39593959) libc/time: Implement timegm function  
 * [#3963](https://github.com/apache/incubator-nuttx/pull/#39633963) libc/sched: Implement nice API  
 * [#3977](https://github.com/apache/incubator-nuttx/pull/#39773977) sched: Add kthread_create_with_stack  
 * [#4016](https://github.com/apache/incubator-nuttx/pull/#40164016) Add heap & stack check to idle thread  
 * [#4114](https://github.com/apache/incubator-nuttx/pull/#41144114) libc/math: Add fmax and fmin functions  
 * [#4130](https://github.com/apache/incubator-nuttx/pull/#41304130) sys/poll: add POLLRDHUP definition   
 * [#4262](https://github.com/apache/incubator-nuttx/pull/#42624262) libc: Add the empty nl_langinfo implementation  
 * [#4272](https://github.com/apache/incubator-nuttx/pull/#42724272) libc: Implement gettext function  
 * [#4432](https://github.com/apache/incubator-nuttx/pull/#44324432) libc:machine: add atomic_load/store/exchange API  
 * [#4438](https://github.com/apache/incubator-nuttx/pull/#44384438) uClibcxx: add weak attribute for new/del ops  
 * [#3681](https://github.com/apache/incubator-nuttx/pull/#36813681) libc: Implement openpty function  
 * [#4363](https://github.com/apache/incubator-nuttx/pull/#43634363) sched/backtrace: add sched_backtrace support 
 * [#4374](https://github.com/apache/incubator-nuttx/pull/#43744374) libxx: add new low level c++ standard library support  
 * [#4425](https://github.com/apache/incubator-nuttx/pull/#44254425) libc: add common machine atomic operation  
 * [#3687](https://github.com/apache/incubator-nuttx/pull/#36873687) libc/pwd: Add NSS_BUFLEN_PASSWD macro  

 ### Bug Fixes   
 * [#4615#3970](https://github.com/apache/incubator-nuttx/pull/#46153970) sched/signallibc: CorrectImplement fesetround kill& withfegetround cancellationfor arm 
 * [#4619#4104](https://github.com/apache/incubator-nuttx/pull/#46194104) sched/clock: Fixadd CPUnsec affinityrange issuescheck in SMPclock_settime  
 * [#3626#4518](https://github.com/apache/incubator-nuttx/pull/#36264518) libcgetaddrinfo: Movesupport pthreadAF_LOCAL stuff to userspaceand AF_RPMSG  
 * [#3673#4595](https://github.com/apache/incubator-nuttx/pull/#36734595) libc/ptymisc: Makeadd ptsname[lib_r]glob support PSEUDOTERM_BSD config too  
 * [#4599#3985](https://github.com/apache/incubator-nuttx/pull/#45993985) sched:tcb_s:rearrange sched_priority/int_priority to word alignmmap: Implement the minial but reasonable mlock/munlock/mprotect  
 * [#3747#4065](https://github.com/apache/incubator-nuttx/pull/#37474065) mm:initialize ensure alignment. Add kmm_malloc_size and mm_malloc_size  
 * [#3962#4096](https://github.com/apache/incubator-nuttx/pull/#39624096) sched/task/task_spawn.cmm: initializeSimplify the variablessemaphore explicitlyhandling  
 * [#3916#4100](https://github.com/apache/incubator-nuttx/pull/#39164100) sched/posix_spawn: Don't insert name at the begin of argv  Implement utime and futimes  

### Bug Fixes 
 * [#3858#4615](https://github.com/apache/incubator-nuttx/pull/#38584615) tlssched/signal: MoveCorrect pthreadkill keywith destructorcancellation to libc  
 * [#3719#4619](https://github.com/apache/incubator-nuttx/pull/#37194619) group/group_signalsched: cancelFix dispatchCPU signalaffinity whenissues child process doesn't exist  in SMP  
 * [#4453#3626](https://github.com/apache/incubator-nuttx/pull/#44533626) libs/libxxlibc: EnforceMove RTTIpthread forstuff buildingto libcxxabiuserspace  
 * [#4450#3673](https://github.com/apache/incubator-nuttx/pull/#44503673) libxx:uClibc++libc/pty: disableMake new_handler.cpp when use libsupc++ptsname[_r] support PSEUDOTERM_BSD config too  
 * [#4456#4599](https://github.com/apache/incubator-nuttx/pull/#44564599) libc/gettext: Initialize path field when creating mofile struct.sched:tcb_s:rearrange sched_priority/int_priority to word align  
 * [#4466#3747](https://github.com/apache/incubator-nuttx/pull/#44663747) sched/wdog/wd_start.c: prevent accessing watch-dog lag if head is NULL  
 * [#4499mm:initialize ensure alignment.  
 * [#3962](https://github.com/apache/incubator-nuttx/pull/#44993962) uClibc++:remove typeinfo.cpp that confict with libsupc++sched/task/task_spawn.c: initialize variables explicitly  
 * [#3698#3916](https://github.com/apache/incubator-nuttx/pull/#36983916) sched/taskposix_spawn: SimplifyDon't insert name at the syscallbegin handling of task_spawnargv  
 * [#3813#3858](https://github.com/apache/incubator-nuttx/pull/#38133858) syscall/syscall.csvtls: Correct ordering of entriesMove pthread key destructor to libc  
 * [#4020#3719](https://github.com/apache/incubator-nuttx/pull/#4020) SMP should depends on ARCH_INTERRUPTSTACK3719) group/group_signal: cancel dispatch signal when child process doesn't exist  
 * [#3957#4453](https://github.com/apache/incubator-nuttx/pull/#39574453) schedlibs/wdoglibxx: RemoveEnforce flagsRTTI fieldfor from wdog_s to save memorybuilding libcxxabi  
 * [#3967#4450](https://github.com/apache/incubator-nuttx/pull/#39674450) libc/dirnamelibxx:uClibc++: Handle the consecutive '/' correctlydisable new_handler.cpp when use libsupc++  
 * [#4018#4456](https://github.com/apache/incubator-nuttx/pull/#40184456) libs/libc/spawngettext: Initialize path fix posix_spawn_file_actions_adddup2 alloc size errorfield when creating mofile struct.  
 * [#4009#4466](https://github.com/apache/incubator-nuttx/pull/#40094466) Move aligned_alloc, posix_memalign and valloc from mm/umm to libs/libc/stdlibsched/wdog/wd_start.c: prevent accessing watch-dog lag if head is NULL  
 * [#4021#4499](https://github.com/apache/incubator-nuttx/pull/#40214499) sched/waitpid: handle waitpid waitting tcb->group is NULLuClibc++:remove typeinfo.cpp that confict with libsupc++  
 * [#4026#3698](https://github.com/apache/incubator-nuttx/pull/#40263698) sched/idletask: disableSimplify schedthe whensyscall idlehandling callof nxtask_bringupspawn  
 * [#4035#3813](https://github.com/apache/incubator-nuttx/pull/#40353813) work_queuesyscall/syscall.csv: scheduleCorrect theordering workof queueentries using the timer mechanism  
 * [#4048
 * [#4020](https://github.com/apache/incubator-nuttx/pull/#40484020) libc:SMP Move pthread_key_destructor to task_info_s should depends on ARCH_INTERRUPTSTACK 
 * [#4057#3957](https://github.com/apache/incubator-nuttx/pull/#40573957) libssched/wdog: libnx:Remove nxfonts:flags Fixfield prefixfrom ofwdog_s generatedto fontssave datamemory  
 * [#4109#3967](https://github.com/apache/incubator-nuttx/pull/#41093967) libc/dirname: Handle Implementthe ttynameconsecutive and ttyname_r'/' correctly  
 * [#4115#4018](https://github.com/apache/incubator-nuttx/pull/#41154018) libs/libc/mathspawn: Fix calculation error of log functionfix posix_spawn_file_actions_adddup2 alloc size error  
 * [#4124#4009](https://github.com/apache/incubator-nuttx/pull/#4124) add #undef for some libc function  4009) Move aligned_alloc, posix_memalign and valloc from mm/umm to libs/libc/stdlib  
 * [#4125#4021](https://github.com/apache/incubator-nuttx/pull/#41254021) libcsched/sysconfwaitpid: Addhandle MONOTONIC_CLOCKwaitpid forwaitting consistencytcb->group is NULL  
 * [#4127#4026](https://github.com/apache/incubator-nuttx/pull/#41274026) libcsched/idle: Increasedisable thesched functionwhen ofidle crc8 to use custom polynomials  call nx_bringup  
 * [#4160#4035](https://github.com/apache/incubator-nuttx/pull/#41604035) group/childwork_status: Dynamically expand group child_statusqueue: schedule the work queue using the timer mechanism  
 * [#4183#4048](https://github.com/apache/incubator-nuttx/pull/#41834048) sched/tasklibc: Fix wrong return value from nxspawn_open()Move pthread_key_destructor to task_info_s  
 * [#4226#4057](https://github.com/apache/incubator-nuttx/pull/#42264057) sysloglibs: reslovelibnx: crashnxfonts: becauseFix vmov.i32prefix instructionof isgenerated notfonts readydata  
 * [#4246#4109](https://github.com/apache/incubator-nuttx/pull/#42464109) libc/pthread_barrierattr_destory.c: DestroyImplement shouldn'tttyname reinitialize the attributesand ttyname_r  
 * [#4270#4115](https://github.com/apache/incubator-nuttx/pull/#42704115) tzsetlibc/math: avoidFix takingcalculation semaphoreerror inof interruptlog forfunction non-kernel mode  
 * [#4413#4124](https://github.com/apache/incubator-nuttx/pull/#44134124) sched/wdog: fix switch_context caused error in wd_start()add #undef for some libc function  
 * [#3703#4125](https://github.com/apache/incubator-nuttx/pull/#37034125) schedlibc/spawnsysconf: SupportAdd theMONOTONIC_CLOCK stackfor addressconsistency argument  
 * [#4287#4127](https://github.com/apache/incubator-nuttx/pull/#42874127) signallibc: Allow SIG_EVTHREAD selectable in protected mode Increase the function of crc8 to use custom polynomials  
 * [#4296#4160](https://github.com/apache/incubator-nuttx/pull/#42964160) schedgroup/child_status: FixDynamically crashexpand on early syslog message with prepended process name  group child_status  
 * [#4368#4183](https://github.com/apache/incubator-nuttx/pull/#43684183) libs/libxx/uClibc++.defs: Download the correct file type.sched/task: Fix wrong return value from nxspawn_open()  
 * [#4369#4226](https://github.com/apache/incubator-nuttx/pull/#43694226) libs/libxxsyslog: Downloadreslove C++crash librariesbecause during contextvmov.i32 instruction 
 is not ready  
 * [#4382#4246](https://github.com/apache/incubator-nuttx/pull/#43824246) sched/backtracelibc/pthread_barrierattr_destory.c: simplifyDestroy theshouldn't assignreinitialize of tcb in case of negative pidthe attributes  
 * [#4377#4270](https://github.com/apache/incubator-nuttx/pull/#43774270) task_spawntzset: release g_spawn_parmsem and sched_unlock at the ending  

## Major Changes to the Build System

### New Features 
 * [#4525avoid taking semaphore in interrupt for non-kernel mode  
 * [#4413](https://github.com/apache/incubator-nuttx/pull/#45254413) mkromfsimgsched/wdog: Add optional rcS file pathfix switch_context caused error in wd_start()  
 * [#4491#3703](https://github.com/apache/incubator-nuttx/pull/#44913703) checkpatch.shsched/spawn: addSupport checkthe gerritstack Change-Idaddress supportargument  
 * [#3716#4287](https://github.com/apache/incubator-nuttx/pull/#37164287) toolssignal: AddAllow aSIG_EVTHREAD bashselectable completionin scriptprotected for themode configure tool  
 

### Bug Fixes 
 * [#4418#4296](https://github.com/apache/incubator-nuttx/pull/#44184296) compiler.h: add __builtin_offsetof instead of offsetofsched: Fix crash on early syslog message with prepended process name  
 * [#3815#4368](https://github.com/apache/incubator-nuttx/pull/#38154368) tools/mksyscalllibs/libxx/uClibc++.defs: FixDownload buildthe breakcorrect of syscall instrumentation wrapperfile type.   
 * [#4461#4369](https://github.com/apache/incubator-nuttx/pull/#44614369) toolslibs/cilibxx: MinorDownload improvementsC++ tolibraries CIduring buildcontext. script  
 * [#4492#4382](https://github.com/apache/incubator-nuttx/pull/#44924382) toolssched/nxstylebacktrace: Fixsimplify the assign checkof tcb toolin incorrectlycase reportedof nonegative alignment.pid  
 * [#3710#4377](https://github.com/apache/incubator-nuttx/pull/#37104377) tools/citask_spawn: Rename sim0x.dat to sim-0x.dat to align with arm-xx.dat  release g_spawn_parmsem and sched_unlock at the ending   
 * [#4455#4068](https://github.com/apache/incubator-nuttx/pull/#44554068) makefilemm: let clean_context in distclean command  

## Architectural Support

### New Architecture

### Architectures with significant improvements

#### ARM
 * [#4522Remove mm_heap_impl_s struct  
 * [#4247](https://github.com/apache/incubator-nuttx/pull/#45224247) arch/arm: Add ARCH_CORTEXM55 Kconfig for cortex-m55Redirect _l function to non-locale version  
 * [#3759#4380](https://github.com/apache/incubator-nuttx/pull/#37594380) arm/v7-a/fpu: add VFP-v3 D32 support    som byteorder modification  
 * [#4536#4283](https://github.com/apache/incubator-nuttx/pull/#45364283) archlibc/armgettext: correct the function name from arm_getsp()Change g_domain to up_getsp()array  
 * [#4410#4512](https://github.com/apache/incubator-nuttx/pull/#44104512) arch/arm/assertlib_vsprintf: enhanceAdd the%pV assertformat dumpsupport  
 * [#4409#4513](https://github.com/apache/incubator-nuttx/pull/#44094513) archlibc/arm/cortex-mrexec/rexec_af: add up_backtrace supportsupport remote command execution  
 * [#4405#4516](https://github.com/apache/incubator-nuttx/pull/#44054516) arch/armv7: add up_backtrace support based on frame pointerlib_fread: return the number of bytes actually read when error occurs.  
 * [#4385#4520](https://github.com/apache/incubator-nuttx/pull/#43854520) arch/armv8-mdebug: Updateallow per the latest architecture reference manual  customize EXTRA_FMT  
 * [#4354#3978](https://github.com/apache/incubator-nuttx/pull/#43543978) arch/arm: correct the frame pointer register declare Decouple the initialization of the separate heaps from the TEXT_HEAP option.  
 * [#4205#4029](https://github.com/apache/incubator-nuttx/pull/#42054029) armmm: add up_secure_irq support fix memory corruption when loop create/exit thread in SMP mode  
 * [#4176#4055](https://github.com/apache/incubator-nuttx/pull/#41764055) ARMmm: fixMove CPSRthe corruptionreal afterimplementation exception handlingof mm_sbrk to sbrk  
 * [#4094#4030](https://github.com/apache/incubator-nuttx/pull/#40944030) arch/armv7-a: Remove the special SMP SGI process  
 * [#4451](https://github.com/apache/incubator-nuttx/pull/#4451) arch: Replace ar, nm and ld with gcc-ar, gcc-nm and gcc  Fix procfs memory corruption when meet long string, add thread run time to procfs  
 * [#4343#4043](https://github.com/apache/incubator-nuttx/pull/#43434043) arch/armv8-mselect: Addfix asan SAUreport supporterror  
 * [#4341#4519](https://github.com/apache/incubator-nuttx/pull/#43414519) arch/armerrno: Add NVIC_FPCCR_XXX macrouse staic errno to avoidreplace thetl_errno hardbefore codetls valueinitialization  
 * [#4279#3992](https://github.com/apache/incubator-nuttx/pull/#42793992) arch/cortex-m: replace arm_switchcontext to c-styleRefine tls_info_s and task_info_s  
 * [#4106#4019](https://github.com/apache/incubator-nuttx/pull/#41064019) arm/setjmp.h:add c++ support Fix asan report error  
 * [#4013#4053](https://github.com/apache/incubator-nuttx/pull/#40134053) armmm: fix enable interrupt too earlier caused system crashMove procfs_register_meminfo into common place  
 * [#4483#4054](https://github.com/apache/incubator-nuttx/pull/#44834054) Fix compilation of arm protected buildmm: Call memalign in malloc if ARCH_ADDRENV and BUILD_KERNEL are defined  
 * [#3879#4454](https://github.com/apache/incubator-nuttx/pull/#38794454) archuser/trap: RenameSet xxx_getspMQ_MAXMSGSIZE to 64 to up_getsp  

#### CXD56XXget NX working  
 * [#4557#3725](https://github.com/apache/incubator-nuttx/pull/#45573725) archcmd/free: cxd56xx: Replace the critical section with spinlock in cxd56_serial.cadd nused/nfree field in command free  
 * [#3743#3753](https://github.com/apache/incubator-nuttx/pull/#37433753) archlibelf: fix arm"nsh: cxd56xxnsh_session: readline Updatefailed: cxd56xx13" driverserror  
 * [#3845#3767](https://github.com/apache/incubator-nuttx/pull/#38453767) binfmt: FixMove spresenseargv withcopy elfinto exec_module 

#### LPC17XX_40XX
 * [#4072#3764](https://github.com/apache/incubator-nuttx/pull/#40723764) lpc17xxbinfmt: Added WDT driver.Rename dump_module to binfmt_dumpmodule  
 * [#4316#4064](https://github.com/apache/incubator-nuttx/pull/#43164064) lpc17_40binfmt: Fixed I2C port sanity check.Replace all nx_ API with file_ API  
 * [#4148#3928](https://github.com/apache/incubator-nuttx/pull/#41483928) lpc17_40binfmt: style fixHandle argv/argv[0] == NULL correctly in WDTexec_module definitions.  
 * [#4107#3867](https://github.com/apache/incubator-nuttx/pull/#41073867) lpc17_40: Fixed progmem driver.  

#### STM32TLS: Correct handling of returned error values.  
 * [#3761#4185](https://github.com/apache/incubator-nuttx/pull/#37614185) ET-STM32 Stampiob_trimhead: Anfix STM32F103RET6an targetinteger fortruncation NuttX 
 * [#4350#4117](https://github.com/apache/incubator-nuttx/pull/#43504117) arch/arm/src/stm32l4/Kconfig: add new STM32L4+ chip types  Dynamically extend Pidhash table  
 * [#4310#4186](https://github.com/apache/incubator-nuttx/pull/#43104186) arch/stm32libc: improvementsImplement fortimes qencoderfunction   
 * [#3752#3908](https://github.com/apache/incubator-nuttx/pull/#3752) Use inttypes stm32fx i2c3908) crypto/random_pool.c: Correct indexing on void pointer  
 * [#4090#3817](https://github.com/apache/incubator-nuttx/pull/#40903817) STM32G43XXaudio: Analogvarious Comparatorfixes  

## * [#3942](https://github.com/apache/incubator-nuttx/pull/#3942) ChangedMajor Changes to the STM32 Analog Comparator driver.Build System

### New Features 
 * [#3729#4525](https://github.com/apache/incubator-nuttx/pull/#37294525) stm32 timersmkromfsimg: PreferAdd GTIMoptional macrosrcS and make this use more uniform.  

#### STM32L4
file path  
 * [#3668#4491](https://github.com/apache/incubator-nuttx/pull/#36684491) arch/arm/src/stm32l4/hardware/stm32l4xrxx: pinmap alternative function for SPI2  checkpatch.sh: add check gerrit Change-Id support  
 * [#4468#3716](https://github.com/apache/incubator-nuttx/pull/#44683716) arch/arm/src/stm32l4tools: fix STM32L4+ option bytes memory address  Add a bash completion script for the configure tool    
 * [#4501#3819](https://github.com/apache/incubator-nuttx/pull/#45013819) arch/arm/src/stm32l4docker/linux: addAdd controlESP32-S2 fortoolchain Vddio2 independent I/Os supply valid  and binaries.
 * [#4469#4203](https://github.com/apache/incubator-nuttx/pull/#44694203) arch/arm/src/stm32l4/stm32l4_flash.c: fix FLASH_CONFIG_I to use dual-bank access  

#### STM32L5

#### S32K1XX
tools: Add armv7-a support to nuttx-gdbinit  
 * [#3850#3705](https://github.com/apache/incubator-nuttx/pull/#38503705) UCANS32K146docker: add supportninja-build   for B

### revisionBug Fixes 
 * [#4493#4418](https://github.com/apache/incubator-nuttx/pull/#44934418) compiler.h: Fix error in s32k118_pinmux.h add __builtin_offsetof instead of offsetof 
 * [#3795#3815](https://github.com/apache/incubator-nuttx/pull/#37953815) S32K1XX LSPI Double word up to 64 bits support  

#### IMX6 
tools/mksyscall: Fix build break of syscall instrumentation wrapper   
 * [#3777#4461](https://github.com/apache/incubator-nuttx/pull/#37774461) archtools/ci: imx6: Add termios supportMinor improvements to imx6CI build 

####script IMXRT 
 * [#3988#4492](https://github.com/apache/incubator-nuttx/pull/#39884492) arch/arm/src/imxrt/imxrt_flexpwm.c: fix mistake in submodules address offsettools/nxstyle: Fix the check tool incorrectly reported no alignment.  
 * [#4431#3710](https://github.com/apache/incubator-nuttx/pull/#44313710) i.MX RT: Changestools/ci: Rename sim0x.dat to FlexCAN driver and Teensy 4.x CAN configuration  sim-0x.dat to align with arm-xx.dat  
 * [#4285#4455](https://github.com/apache/incubator-nuttx/pull/#42854455) arch/arm/src/imxrt/imxrt_flexpwm.cmakefile: Setlet LDOKclean_context bitsin afterdistclean all channelscommand are set  
 * [#4138#4423](https://github.com/apache/incubator-nuttx/pull/#41384423) i.MX RTboard: addedEnable supportCONFIG_LIBCXXABI forwhen TicklessCONFIG_LIBCXX OS  

#### RP2040is enabled  
 * [#4049#4196](https://github.com/apache/incubator-nuttx/pull/#4049) Raspipico smp 4196) tools: Fix nuttx-gdbinit  

## Architectural Support

### New Architecture 

#### MIPS

##### PIC32
 * [#4251#4252](https://github.com/apache/incubator-nuttx/pull/#42514252) raspberrypi-picopic32mz: addadded support for lcd_dev  PIC32MZ2048EFG MCU 

### Architectures with significant improvements

#### RTL8720CARM
 * [#4076#4522](https://github.com/apache/incubator-nuttx/pull/#40764522) AmebaZ2arch/arm: Add socARCH_CORTEXM55 srcKconfig code 

#### NRF52

#### STM32H7/STM32F7for cortex-m55  
 * [#4331#3759](https://github.com/apache/incubator-nuttx/pull/#43313759) archarm/armv7-a/stm32h7fpu: dmaadd and serial: add TRBUFF flag.VFP-v3 D32 support    
 * [#4441#4536](https://github.com/apache/incubator-nuttx/pull/#44414536) arch/arm/stm32f7/stm32_irq: Fix format strings: correct the function name from arm_getsp() to up_getsp()  
 * [#4098#4410](https://github.com/apache/incubator-nuttx/pull/#40984410) stm32h7 Ethernet add yield and timeout to not hog CPU  arch/arm/assert: enhance the assert dump  
 * [#3730#4409](https://github.com/apache/incubator-nuttx/pull/#37304409) stm32h7 rccarch/arm/cortex-m: Syncadd h7x7xx and h7x3xx. Changes are relevant to both  up_backtrace support  
 * [#3892#4405](https://github.com/apache/incubator-nuttx/pull/#38924405) arch/arm/src/stm32h7armv7: qspiadd useup_backtrace indirectsupport writebased insteadon offrame indirectpointer read 
 * [#3728#4385](https://github.com/apache/incubator-nuttx/pull/#37284385) stm32f7: Remove references to BOARD_ENABLE_USBOTG_HSULPI.arch/armv8-m: Update per the latest architecture reference manual  
 * [#3731#4354](https://github.com/apache/incubator-nuttx/pull/#37314354) stm32arch/stm32f7arm: tickless:correct Fix up_timer_getmask to be correct for the width of the timer. the frame pointer register declare 
 * [#3976#4205](https://github.com/apache/incubator-nuttx/pull/#39764205) STM32F7 SDMMC fixesarm: add up_secure_irq support  
 * [#3924#4176](https://github.com/apache/incubator-nuttx/pull/#39244176) stm32h7ARM: fix forCPSR adccorruption toafter handleexception overrun andhandling the DR's fifo  

#### Renesas 
 * [#4230#4094](https://github.com/apache/incubator-nuttx/pull/#42304094) renesasarch/rx65narmv7-a: addRemove longthe typespecial forSMP allSGI PRI*PTR  

#### RX65N

#### Risc-V
 process  
 * [#3770#4451](https://github.com/apache/incubator-nuttx/pull/#3770) Add support for PolarFire SoC and icicle board4451) arch: Replace ar, nm and ld with gcc-ar, gcc-nm and gcc  
 * [#3997#4343](https://github.com/apache/incubator-nuttx/pull/#39974343) risc-v/bl602arch/armv8-m: updateAdd wifiSAU firmwaresupport version  
 * [#4381#4341](https://github.com/apache/incubator-nuttx/pull/#43814341) arch/riscv/assertarm: enhanceAdd NVIC_FPCCR_XXX macro to avoid the asserthard code dumpvalue  
 * [#4367#4279](https://github.com/apache/incubator-nuttx/pull/#43674279) riscvarch/backtracecortex-m: addreplace uparm_backtrace supportswitchcontext to c-style  
 * [#4365#4106](https://github.com/apache/incubator-nuttx/pull/#43654106) riscvarm/commonsetjmp.h: add CURRENT_REGS declare in RV32  c++ support  
 * [#4342#4013](https://github.com/apache/incubator-nuttx/pull/#43424013) riscv/bl602arm: Fixfix thatenable APinterrupt cannottoo beearlier startcaused when STA have been started.  system crash  
 * [#4335#4483](https://github.com/apache/incubator-nuttx/pull/#43354483) Fix arch/bl602：Addcompilation bl602of osarm adapterprotected layerbuild  
 * [#4145#3879](https://github.com/apache/incubator-nuttx/pull/#41453879) risc-v/bl602arch: updateRename wifixxx_getsp firmware and some fixup.  to up_getsp  
 * [#3849#4227](https://github.com/apache/incubator-nuttx/pull/#38494227) risc-v/mpfspwm: irqadd fixes, more register defines and up_systemreset()option to break the loops when using multiple PWM channels  
 * [#3984#4261](https://github.com/apache/incubator-nuttx/pull/#39844261) risc-v/bl602: Support AP and STA as independent network interface device  EXC_SECURE and SECURE_STACK just can clear at TRUSTZONE_NONSECURE  

#### CXD56XX
 * [#3913#4557](https://github.com/apache/incubator-nuttx/pull/#39134557) arch: k210cxd56xx: FixReplace stackthe coloringcritical forsection thewith idlespinlock thread stack in cxd56_serial.c 
 * [#3757#3743](https://github.com/apache/incubator-nuttx/pull/#37573743) riscvarch: Addarm: inlinecxd56xx: IRQUpdate processcxd56xx functionsdrivers  
 * [#4041#3845](https://github.com/apache/incubator-nuttx/pull/#40413845) risc-v/bl602: add efuse driverFix spresense with elf  

#### RV64

#### ESP32C3LPC17XX_40XX
 * [#3853#4072](https://github.com/apache/incubator-nuttx/pull/#38534072) arch/risc-v/esp32c3lpc17xx: addAdded esp32c3_modtext to allow ELF loading  
 
#### BL602 
 * [#3784WDT driver.  
 * [#4316](https://github.com/apache/incubator-nuttx/pull/#37844316) risc-v/bl602lpc17_40: Add RTC driverFixed I2C port sanity check.  
 * [#4607#4148](https://github.com/apache/incubator-nuttx/pull/#46074148) Open ble controller adaptation code  

#### Xtensalpc17_40: style fix in WDT definitions.  
 * [#4280#4107](https://github.com/apache/incubator-nuttx/pull/#42804107) archlpc17_40:xtensa: addFixed newprogmem GNUdriver. toolchain for xtensa.  

#### STM32
 * [#4478#3761](https://github.com/apache/incubator-nuttx/pull/#44783761) arch: xtensaET-STM32 Stamp: addAn xtensaSTM32F103RET6 cachetarget supportfor  NuttX 
 * [#4547#4350](https://github.com/apache/incubator-nuttx/pull/#45474350) arch:xtensa/arm/src/stm32l4/Kconfig: add new STM32L4+ fullchip bactracetypes support 
 * [#4407#4310](https://github.com/apache/incubator-nuttx/pull/#44074310) arch/xtensa/src/commonstm32: Useimprovements irq_spin APIs in modifyregXXfor qencoder   
 * [#4403#3752](https://github.com/apache/incubator-nuttx/pull/#44033752) Use driver-specificinttypes spinlockstm32fx for ESP32i2c serial driver.  
 * [#4458#4090](https://github.com/apache/incubator-nuttx/pull/#44584090) arch:xtensa: add xtensa mpu supportSTM32G43XX Analog Comparator  
 * [#3762#3942](https://github.com/apache/incubator-nuttx/pull/#37623942) xtensa:Changed #ifdefthe SYMBOLSTM32 isAnalog always true if SYMBOL defined as 0  

#### ESP32
 Comparator driver. 
 * [#4638#3729](https://github.com/apache/incubator-nuttx/pull/#46383729) esp32xx_rom.ld stm32 timers: StronglyPrefer declareGTIM somemacros ofand themake libgcc.athis functionsuse that are ROM resident  more uniform.  
 * [#4417#4163](https://github.com/apache/incubator-nuttx/pull/#44174163) arch/esp32: Properly handle GPIO interrupt in SMP. Files for pysimCoder 
 * [#4234#4151](https://github.com/apache/incubator-nuttx/pull/#42344151) espressif/esp32/esp32s2/esp32c3: Disable wdt on initialization.  

### Minor changes

## Simulator Change DAC driver to support STM32G4 DAC  

#### STM32L4
 * [#3921#3668](https://github.com/apache/incubator-nuttx/pull/#39213668) simarch/arm/src/stm32l4/hardware/stm32l4xrxx: Usepinmap ccalternative asfunction linker,for which usually aliases to either GCC or Clang  SPI2  
 * [#4108#4468](https://github.com/apache/incubator-nuttx/pull/#41084468) boards/sim: enable nxlooper for alsa configarch/arm/src/stm32l4: fix STM32L4+ option bytes memory address  
 * [#4222#4501](https://github.com/apache/incubator-nuttx/pull/#42224501) sim/cmdline: save boot cmdlinearch/arm/src/stm32l4: add control for Vddio2 independent I/Os supply valid  
 * [#4209#4469](https://github.com/apache/incubator-nuttx/pull/#4209) Fix sim smp  
 * [#42074469) arch/arm/src/stm32l4/stm32l4_flash.c: fix FLASH_CONFIG_I to use dual-bank access  

#### STM32L5

#### S32K1XX
 * [#3850](https://github.com/apache/incubator-nuttx/pull/#42073850) arch:UCANS32K146 sim:add Workaroundsupport tofor make the IPI work on macOS  B revision  
 * [#4167#4493](https://github.com/apache/incubator-nuttx/pull/#41674493) arch/sim: The second CPU shouldn't call up_irqinitializeFix error in s32k118_pinmux.h  
 * [#3904#3795](https://github.com/apache/incubator-nuttx/pull/#39043795) boards/sim/sim/sim: correct LDLINKFLAGS after migrating from ld to gcc S32K1XX LSPI Double word up to 64 bits support  

#### IMX6 
 * [#4056#3777](https://github.com/apache/incubator-nuttx/pull/#40563777) arch/sim: Fiximx6: btAdd andtermios audiosupport simulationto stopimx6 work in SMP mode  

#### IMXRT 
 * [#4045#3988](https://github.com/apache/incubator-nuttx/pull/#40453988) sim/smparch/arm/src/imxrt/imxrt_flexpwm.c: fix smpmistake can't start, caused by signal too busy  in submodules address offset  
 * [#4015#4431](https://github.com/apache/incubator-nuttx/pull/#40154431) modify sim clock to PC abs timei.MX RT: Changes to FlexCAN driver and Teensy 4.x CAN configuration  
 * [#3983#4285](https://github.com/apache/incubator-nuttx/pull/#39834285) arch/sim/arm/src/imxrt/imxrt_flexpwm.c: ImplementSet mm_mallinfoLDOK andbits malloc_sizeafter forall thechannels customare heapset  
 * [#4459#4138](https://github.com/apache/incubator-nuttx/pull/#44594138) i.MX simRT: Inhibitadded stacksupport protectorfor onTickless stackOS coloration function

#### RP2040 
 * [#3721#4049](https://github.com/apache/incubator-nuttx/pull/#37214049) sim/rptun: support multi(>2) core interactive by share memoryRaspipico smp 
 * [#4251](https://github.com/apache/incubator-nuttx/pull/4251) raspberrypi-pico: add support for lcd_dev  
 * [#4306#4002](https://github.com/apache/incubator-nuttx/pull/#43064002) boards/sim: Add smartfs profile example  

### New Features

### Bug Fixes

## Documentation

### New Features  Kinetis Replace DMA with a proper eDMA driver and use it on SPI and Serial  

#### RTL8720C
 * [#3970#4076](https://github.com/apache/incubator-nuttx/pull/#39704076) libcAmebaZ2: ImplementAdd fesetroundsoc &src fegetroundcode for arm 

####### ImprovementsNRF52

### Driver Support#### STM32H7/STM32F7
 * [#3842#4331](https://github.com/apache/incubator-nuttx/pull/#38424331) Added automatic log rotation, when log file is opened.arch/arm/stm32h7: dma and serial: add TRBUFF flag. 
 * [#3837#4441](https://github.com/apache/incubator-nuttx/pull/#38374441) SYSLOG channel add functions return handle to the channel.arch/arm/stm32f7/stm32_irq: Fix format strings  
 * [#3848#4098](https://github.com/apache/incubator-nuttx/pull/#38484098) Syslog file rotations number is configurable.stm32h7 Ethernet add yield and timeout to not hog CPU  
 * [#3808#3730](https://github.com/apache/incubator-nuttx/pull/#38083730) stm32h7 Ramlogrcc: Sync h7x7xx recoverand lasth7x3xx. crashChanges logare fromrelevant ramto buffer.both  
 * [#4614#3892](https://github.com/apache/incubator-nuttx/pull/#46143892) input/toucharch/arm/src/stm32h7: addqspi iouse commandindirect forwrite touchinstead firmwareof versionindirect read 

### Bug Fixes

### New Driver Support 
 * [#3727* [#3728](https://github.com/apache/incubator-nuttx/pull/#37273728) Addstm32f7: basicRemove supportreferences for MCP23017 I/O Expanderto BOARD_ENABLE_USBOTG_HSULPI.  
 * [#3859#3731](https://github.com/apache/incubator-nuttx/pull/#38593731) Add Holtek HT16K33 14-segment display driver stm32/stm32f7 tickless: Fix up_timer_getmask to be correct for the width of the timer. 
 * [#4641#3976](https://github.com/apache/incubator-nuttx/pull/#46413976) drivers/mtd/m25px.c: add support for MT25Q256 SPI NOR  STM32F7 SDMMC fixes  
 * [#4606#3924](https://github.com/apache/incubator-nuttx/pull/#46063924) Addstm32h7 supportfix for MT25Q1Gadc SPIto NORhandle overrun 
and 

## Board Support

### New Board Support

### Boards With Significant Improvementsthe DR's fifo  

#### ARM 
 
#### CXD56Renesas 
 * [#3833#4230](https://github.com/apache/incubator-nuttx/pull/#38334230) Spresense new memorymap renesas/rx65n: add long type for all PRI*PTR  
 * [#4526#3989](https://github.com/apache/incubator-nuttx/pull/#4526) Rearch video  3989) Renesas/RX added setjmp and placeholder ioctl  

#### Risc-V
 * [#3973#3770](https://github.com/apache/incubator-nuttx/pull/#39733770) boards: spresense: Update rndisAdd support for PolarFire SoC and rndis_smp for workaround  icicle board
 * [#3744#3997](https://github.com/apache/incubator-nuttx/pull/#37443997) boardsrisc-v/bl602: cxd56xx:update Updatewifi driversfirmware onversion spresense board  

#### IMX6 
 * [#3733#4381](https://github.com/apache/incubator-nuttx/pull/#37334381) imx6 elf support #3733  

#### IMXRT  arch/riscv/assert: enhance the assert dump  
 * [#3982#4367](https://github.com/apache/incubator-nuttx/pull/#39824367) boards/arm/imxrt/teensy-4.xriscv/backtrace: added board leveladd up_backtrace support for GPIO driver
 * [#3929#4365](https://github.com/apache/incubator-nuttx/pull/#39294365) Added encoder support for Teensy 4.xriscv/common: add CURRENT_REGS declare in RV32  
 * [#3980#4342](https://github.com/apache/incubator-nuttx/pull/#39804342) FlexPWM support for iMXRT MCU riscv/bl602: Fix that AP cannot be start when STA have been started.  
 * [#4581#4335](https://github.com/apache/incubator-nuttx/pull/#45814335) Fixedarch/bl602：Add imxrtbl602 flexcanos driver compilation error (incorrect variable scope)  

#### LPC17XX_40XX

#### NRF52

#### RP2040 
 adapter layer  
 * [#3917#4145](https://github.com/apache/incubator-nuttx/pull/#39174145) armrisc-v/rp2040:USB device controller support  bl602: update wifi firmware and some fixup.  
 * [#3857#3849](https://github.com/apache/incubator-nuttx/pull/#38573849) boards: rp2040: Add user gpio driverrisc-v/mpfs: irq fixes, more register defines and up_systemreset()  
 * [#3996#3984](https://github.com/apache/incubator-nuttx/pull/#3996)3984) risc-v/bl602: Support forAP Waveshare Pico-LCD-1.x module
  
#### S32K1XX
 * [#4643and STA as independent network interface device  
 * [#3913](https://github.com/apache/incubator-nuttx/pull/3913) arch: k210: Fix stack coloring for the idle thread stack  
 * [#3757](https://github.com/apache/incubator-nuttx/pull/3757) riscv: Add inline IRQ process functions  
 * [#4041](https://github.com/apache/incubator-nuttx/pull/4041) risc-v/bl602: add efuse driver  
 * [#4384](https://github.com/apache/incubator-nuttx/pull/4384) Mpfs core pwm  
 * [#4507](https://github.com/apache/incubator-nuttx/pull/4507) various MPFS fixes  

#### ESP32-C3
 * [#3853](https://github.com/apache/incubator-nuttx/pull/3853) arch/risc-v/esp32c3: add esp32c3_modtext to allow ELF loading  
 
#### BL602 
 * [#3784](https://github.com/apache/incubator-nuttx/pull/3784) risc-v/bl602: Add RTC driver  
 * [#4607](https://github.com/apache/incubator-nuttx/pull/4607) Open ble controller adaptation code  

#### Xtensa
 * [#4280](https://github.com/apache/incubator-nuttx/pull/4280) arch:xtensa: add new GNU toolchain for xtensa.  
 * [#4478](https://github.com/apache/incubator-nuttx/pull/4478) arch: xtensa: add xtensa cache support   
 * [#4547](https://github.com/apache/incubator-nuttx/pull/4547) arch:xtensa: add full bactrace support 
 * [#4407](https://github.com/apache/incubator-nuttx/pull/4407) arch/xtensa/src/common: Use irq_spin APIs in modifyregXX  
 * [#4403](https://github.com/apache/incubator-nuttx/pull/4403) Use driver-specific spinlock for ESP32 serial driver.  
 * [#4458](https://github.com/apache/incubator-nuttx/pull/4458) arch:xtensa: add xtensa mpu support  
 * [#3762](https://github.com/apache/incubator-nuttx/pull/3762) xtensa: #ifdef SYMBOL is always true if SYMBOL defined as 0  

#### ESP32
 * [#4638](https://github.com/apache/incubator-nuttx/pull/4638) esp32xx_rom.ld: Strongly declare some of the libgcc.a functions that are ROM resident  
 * [#4417](https://github.com/apache/incubator-nuttx/pull/4417) arch/esp32: Properly handle GPIO interrupt in SMP. 
 * [#4234](https://github.com/apache/incubator-nuttx/pull/4234) espressif/esp32/esp32s2/esp32c3: Disable wdt on initialization.  

#### X86_64
 * [#4447](https://github.com/apache/incubator-nuttx/pull/4447) Fix x86_64  

### General changes
 * [#4233](https://github.com/apache/incubator-nuttx/pull/4233) board/ctrl: Add BOARDIOC_BOOT_IMAGE for booting a new application image  
 * [#4191](https://github.com/apache/incubator-nuttx/pull/4191) Add BOARDCTL_SWITCH_BOOT to support switch boot system 
 * [#4089](https://github.com/apache/incubator-nuttx/pull/4089) board/ctrl: add BOARDCTL_UNIQUEKEY support  
 
 ## Simulator 
 * [#3921](https://github.com/apache/incubator-nuttx/pull/3921) sim: Use cc as linker, which usually aliases to either GCC or Clang  
 * [#4108](https://github.com/apache/incubator-nuttx/pull/4108) boards/sim: enable nxlooper for alsa config  
 * [#4222](https://github.com/apache/incubator-nuttx/pull/4222) sim/cmdline: save boot cmdline  
 * [#4209](https://github.com/apache/incubator-nuttx/pull/4209) Fix sim smp  
 * [#4207](https://github.com/apache/incubator-nuttx/pull/4207) arch: sim: Workaround to make the IPI work on macOS  
 * [#4167](https://github.com/apache/incubator-nuttx/pull/4167) arch/sim: The second CPU shouldn't call up_irqinitialize  
 * [#3904](https://github.com/apache/incubator-nuttx/pull/3904) boards/sim/sim/sim: correct LDLINKFLAGS after migrating from ld to gcc  
 * [#4056](https://github.com/apache/incubator-nuttx/pull/4056) arch/sim: Fix bt and audio simulation stop work in SMP mode  
 * [#4045](https://github.com/apache/incubator-nuttx/pull/4045) sim/smp: fix smp can't start, caused by signal too busy  
 * [#4015](https://github.com/apache/incubator-nuttx/pull/4015) modify sim clock to PC abs time  
 * [#3983](https://github.com/apache/incubator-nuttx/pull/3983) arch/sim: Implement mm_mallinfo and malloc_size for the custom heap  
 * [#4459](https://github.com/apache/incubator-nuttx/pull/4459) sim: Inhibit stack protector on stack coloration function  
 * [#3721](https://github.com/apache/incubator-nuttx/pull/3721) sim/rptun: support multi(>2) core interactive by share memory  
 * [#4306](https://github.com/apache/incubator-nuttx/pull/4306) boards/sim: Add smartfs profile example 
 * [#4258](https://github.com/apache/incubator-nuttx/pull/4258) Use exit func iml host_abort.  
 * [#3689](https://github.com/apache/incubator-nuttx/pull/3689) Apps Issue #246: Replace romdisk_register() with boardctl(BOARDIOC_ROMDISK)  
 * [#4465](https://github.com/apache/incubator-nuttx/pull/4465) feature: driver: Add a Linux SPI into simulator.  

## Documentation

### New Features   
 * [#3634](https://github.com/apache/incubator-nuttx/pull/3634) Documentation/platforms: added documentation for imxrt10xx boards  
 * [#4470](https://github.com/apache/incubator-nuttx/pull/4470) Doc: Add initial documentation to the simulator  
 * [#4419](https://github.com/apache/incubator-nuttx/pull/4419) doc/esp32: Add instructions to use softap  
 
 ### Improvements 
 * [#3782](https://github.com/apache/incubator-nuttx/pull/3782) spi: Improve SPI Slave interface documentation  
 * [#4390](https://github.com/apache/incubator-nuttx/pull/4390) Documentation: Update ESP32-C3 supported peripheral list.  
 * [#3702](https://github.com/apache/incubator-nuttx/pull/3702) Documentation/esp32c3: Fix a couple of issues from #3700 
 * [#4242](https://github.com/apache/incubator-nuttx/pull/4242) Documentation/bl602: Update some imformation  
 * [#3662](https://github.com/apache/incubator-nuttx/pull/3662) Fix some issues on SPI documentation  
 * [#4375](https://github.com/apache/incubator-nuttx/pull/4375) Documentation/esp32-wrover-kit: update the name of the GPIO interrupt device.  
 * [#4298](https://github.com/apache/incubator-nuttx/pull/4298) Doc/FAQ: Add more entries about board initialization  
 * [#3899](https://github.com/apache/incubator-nuttx/pull/3899) Documentation: Update kconfig-frontends install instructions  
 * [#4235](https://github.com/apache/incubator-nuttx/pull/4235) Documentation/: Update ESP32 doc.  
 * [#3802](https://github.com/apache/incubator-nuttx/pull/3802) Doc: Improve documentation to make clear about the priorities  
 * [#4564](https://github.com/apache/incubator-nuttx/pull/4564) Doc: Update download version to 10.1 and fix tar command  
 * [#3700](https://github.com/apache/incubator-nuttx/pull/3700) Convert ESP32-C3 README to the new Documentation  
 * [#4298](https://github.com/apache/incubator-nuttx/pull/4298) Doc/FAQ: Add more entries about board initialization  
 * [#4297](https://github.com/apache/incubator-nuttx/pull/4297) Documentation/FAQ: Why /dev/ttySx is not created 

### Driver Support

### Bug Fixes  
 * [#3842](https://github.com/apache/incubator-nuttx/pull/3842) Added automatic log rotation, when log file is opened.
 * [#3837](https://github.com/apache/incubator-nuttx/pull/3837) SYSLOG channel add functions return handle to the channel.
 * [#3848](https://github.com/apache/incubator-nuttx/pull/3848) Syslog file rotations number is configurable.
 * [#3808](https://github.com/apache/incubator-nuttx/pull/3808) Ramlog: recover last crash log from ram buffer.  
 * [#4614](https://github.com/apache/incubator-nuttx/pull/4614) input/touch: add io command for touch firmware version   
 * [#4632](https://github.com/apache/incubator-nuttx/pull/4632) feat: driver: support double buffer for display  
 * [#4650](https://github.com/apache/incubator-nuttx/pull/4650) driver/power: using upper-half structure directly in the lower-half structure.  
 * [#4370](https://github.com/apache/incubator-nuttx/pull/4370) drivers/sensors/bmp280.c: Correct bmp280 driver  
 * [#4243](https://github.com/apache/incubator-nuttx/pull/4243) drivers/mmcsd:Send cmd0 just once for Increased compatibility  
 * [#4231](https://github.com/apache/incubator-nuttx/pull/4231) adc: add ioctl command to get the number of configured channels  
 * [#4007](https://github.com/apache/incubator-nuttx/pull/4007) driver/fakesensor: fix bugs.  
 * [#4177](https://github.com/apache/incubator-nuttx/pull/4177) serial: use Ctrl+? composite key to force panic"  
 * [#3851](https://github.com/apache/incubator-nuttx/pull/3851) spi: Refactor SPI Slave interface prefix to sync with I2C Slave  
 * [#4095](https://github.com/apache/incubator-nuttx/pull/4095) drivers/syslog: Avoid prepending process name when no TCB is available 
 * [#3990](https://github.com/apache/incubator-nuttx/pull/3990) drivers: wireless: Fix error handling in gs2200m_ioctl_send()  
 * [#3860](https://github.com/apache/incubator-nuttx/pull/3860) drivers: serial: Remove an unnecessary critical section (cs) for SMP  
 * [#3910](https://github.com/apache/incubator-nuttx/pull/3910) serial/pty: Initialize the terminal setting as a console  
 * [#4110](https://github.com/apache/incubator-nuttx/pull/4110) bcm43xxx: supported IW_AUTH_CIPHER_NONE mode  
 * [#4131](https://github.com/apache/incubator-nuttx/pull/4131) drivers/rptun: replace the notification mech from signal to semaphore  
 * [#4132](https://github.com/apache/incubator-nuttx/pull/4132) serial: add ctrl+@ to force crash system for debugging  
 * [#4156](https://github.com/apache/incubator-nuttx/pull/4156) Fakesensor: support gps by read nema csv and delete fakesensor init.  
 * [#4225](https://github.com/apache/incubator-nuttx/pull/4225) sensor: directly return -ENOTSUP without the set_interval or batch  
 * [#4228](https://github.com/apache/incubator-nuttx/pull/4228) drivers: wireless: Fix to set the address family for recvfrom() in gs2200m  
 * [#4288](https://github.com/apache/incubator-nuttx/pull/4288) adc: add IOCTL commands ANIOC_RESET_FIFO and ANIOC_SAMPLES_ON_READ  
 * [#4312](https://github.com/apache/incubator-nuttx/pull/4312) drivers/qencoder: add command to set the maximum encoder position  
 * [#4652](https://github.com/apache/incubator-nuttx/pull/4652) driver/sensor: support sensor_ops: selftest  
 * [#3633](https://github.com/apache/incubator-nuttx/pull/3633) drivers/serial: fix Rx interrupt enable for cdcacm  
 * [#4504](https://github.com/apache/incubator-nuttx/pull/4504) add new interface for fb driver and lcd dev driver  
 * [#4554](https://github.com/apache/incubator-nuttx/pull/4554) drivers/lcd: Add GC9A01 driver and refine ST7735  
 * [#3658](https://github.com/apache/incubator-nuttx/pull/3658) drivers: move the generic upper-half motor driver  
 * [#4397](https://github.com/apache/incubator-nuttx/pull/4397) Update lm3s6965  
 * [#4489](https://github.com/apache/incubator-nuttx/pull/4489) drivers/mmcsd: Pass the right buffer size to SDIO_DMAPREFLIGHT  
 * [#4479](https://github.com/apache/incubator-nuttx/pull/4479) drivers/sdmmc: Remove rwbuffer to avoid panic  
 * [#4476](https://github.com/apache/incubator-nuttx/pull/4476) drivers/mmcsd: Change up_udelay to nxsig_usleep if delay >= 1ms  
 * [#4474](https://github.com/apache/incubator-nuttx/pull/4474) drivers/mmcsd: Handle the failure correctly in mmcsd_slotinitialize  
 * [#4473](https://github.com/apache/incubator-nuttx/pull/4473) drivers/mmcsd: Fix the wrong format argument in mmcsd_dmpcsd  
 * [#3720](https://github.com/apache/incubator-nuttx/pull/3720) driver/syslog: add CONFIG_SYSLOG_RPMSG_SERVER_NAME  
 * [#3864](https://github.com/apache/incubator-nuttx/pull/3864) Fix ht16k33 driver to support multi-modules  
 * [#3828](https://github.com/apache/incubator-nuttx/pull/3828) syslog/emerg: fix bug about printing LOG_EMERG log from iob buffer  
 * [#3806](https://github.com/apache/incubator-nuttx/pull/3806) syslog: fix bug about syslog_default_write  
 * [#3936](https://github.com/apache/incubator-nuttx/pull/3936) syslog/ramlog: Remove the duplication of \n->\r\n conversion  
 * [#3907](https://github.com/apache/incubator-nuttx/pull/3907) serial/pty: Don't return -NOSYS if pollfd::events equals 0  
 * [#3742](https://github.com/apache/incubator-nuttx/pull/3742) drivers/modem/altair: Fix behavior when a reset packet conflicts with a send packet  
 * [#3741](https://github.com/apache/incubator-nuttx/pull/3741) drivers/mtd/smart.c: Recover the missing link of directory entry  
 * [#3736](https://github.com/apache/incubator-nuttx/pull/3736) drivers/syslog: Remove emergstream implementation and caller  
 * [#3726](https://github.com/apache/incubator-nuttx/pull/3726) rtc: add config RTC_RPMSG_SERVER, RTC_RPMSG_SERVER_NAME  
 * [#4113](https://github.com/apache/incubator-nuttx/pull/4113) syslog/ramlog: optimize code and fix init issue  
 * [#4111](https://github.com/apache/incubator-nuttx/pull/4111) syslog/intbuf: force output log when syslog interrupt buffer is full  
 * [#4042](https://github.com/apache/incubator-nuttx/pull/4042) serial: add ioctl TIOCNOTTY  
 * [#4034](https://github.com/apache/incubator-nuttx/pull/4034) syslog: add CPU id to system when open CONFIG_SMP  
 * [#4032](https://github.com/apache/incubator-nuttx/pull/4032) syslog: fix crash when print localtime by syslog  
 * [#3979](https://github.com/apache/incubator-nuttx/pull/3979) note: Move up_schednote.c to drivers/note folder  
 * [#4475](https://github.com/apache/incubator-nuttx/pull/4475) drivers/mmcsd: Change mmsd_ prefix to mmcsd_ prefix  
 * [#4415](https://github.com/apache/incubator-nuttx/pull/4415) Adds driver for msa301 sensore module  
 * [#4420](https://github.com/apache/incubator-nuttx/pull/4420) sensor: fix the bug that lsm6dsl selftest is invalid in nuttx.  
 * [#3787](https://github.com/apache/incubator-nuttx/pull/3787) drivers/spi: Add SPI Slave character device driver  
 * [#4566](https://github.com/apache/incubator-nuttx/pull/4566) drivers/syslog: Call up_puts in syslog_default_write instad up_putc  
 * [#4580](https://github.com/apache/incubator-nuttx/pull/4580) drivers/syslog: Ensure the buffer zero terminate 
 * [#4302](https://github.com/apache/incubator-nuttx/pull/4302) Compile fixes in MCP23X17 driver.  
 * [#4299](https://github.com/apache/incubator-nuttx/pull/4299) bchlib: Improve error handling  
 * [#4345](https://github.com/apache/incubator-nuttx/pull/4345) mtd: Implement BIOC_PARTINFO for all drivers  
 * [#4248](https://github.com/apache/incubator-nuttx/pull/4248) mtd: Return MTD Partition Information 
 * [#4166](https://github.com/apache/incubator-nuttx/pull/4166) mtd: Add MTDIOC_ERASESTATE command for retrieving erase state value 
 * [#3885](https://github.com/apache/incubator-nuttx/pull/3885) mtd: Add MTDIOC_FLUSH IOCTL like MTDIOC_XIPBASE  
 * [#3722](https://github.com/apache/incubator-nuttx/pull/3722) lirc: fix bug about lirc_raw_event   
 * [#4515](https://github.com/apache/incubator-nuttx/pull/4515) rptun: add CONFIG_RPTUN_LOADER to optimize code size  
 * [#4223](https://github.com/apache/incubator-nuttx/pull/4223) rptun: optimize multi-core startup  
 * [#4552](https://github.com/apache/incubator-nuttx/pull/4552) bcm43xxx: abrupt stall of receiving new credits from sdpcm header  
 * [#4565](https://github.com/apache/incubator-nuttx/pull/4565) bcm43xxx: added SDPCM frame pool size parameter  
 * [#4236](https://github.com/apache/incubator-nuttx/pull/4236) bcm43xxx: fixed issues with unaligned buffers for DMA transfers.  
 * [#4567](https://github.com/apache/incubator-nuttx/pull/4567) lcd/st77xx: change 16 bit cmd send to 8 bit 
 * [#4137](https://github.com/apache/incubator-nuttx/pull/4137) bluetooth: add more OGF definition  
 * [#4039](https://github.com/apache/incubator-nuttx/pull/4039) Add putarea() method for st7789  
 * [#3754](https://github.com/apache/incubator-nuttx/pull/3754) wireless/bluetooth: decoupling bt_driver_s and bt_buf_s  

### New Driver Support 
 * [#3727](https://github.com/apache/incubator-nuttx/pull/3727) Add basic support for MCP23017 I/O Expander 
 * [#3859](https://github.com/apache/incubator-nuttx/pull/3859) Add Holtek HT16K33 14-segment display driver  
 * [#4641](https://github.com/apache/incubator-nuttx/pull/4641) drivers/mtd/m25px.c: add support for MT25Q256 SPI NOR  
 * [#4606](https://github.com/apache/incubator-nuttx/pull/4606) Add support for MT25Q1G SPI NOR  
 * [#4373](https://github.com/apache/incubator-nuttx/pull/4373) Add support for 3-phase Hall effect sensor driver  
 * [#4490](https://github.com/apache/incubator-nuttx/pull/4490) add support for power management ic axp202 

## Board Support

### New Board Support

### Boards With Significant Improvements

#### ARM 
 
#### CXD56
 * [#3833](https://github.com/apache/incubator-nuttx/pull/3833) Spresense new memorymap
 * [#4526](https://github.com/apache/incubator-nuttx/pull/4526) Rearch video  
 * [#3973](https://github.com/apache/incubator-nuttx/pull/3973) boards: spresense: Update rndis and rndis_smp for workaround  
 * [#3744](https://github.com/apache/incubator-nuttx/pull/3744) boards: cxd56xx: Update drivers on spresense board  

#### IMX6 
 * [#3733](https://github.com/apache/incubator-nuttx/pull/3733) imx6 elf support  

#### IMXRT  
 * [#3982](https://github.com/apache/incubator-nuttx/pull/3982) boards/arm/imxrt/teensy-4.x: added board level support for GPIO driver
 * [#3929](https://github.com/apache/incubator-nuttx/pull/3929) Added encoder support for Teensy 4.x
 * [#3980](https://github.com/apache/incubator-nuttx/pull/3980) FlexPWM support for iMXRT MCU   
 * [#4581](https://github.com/apache/incubator-nuttx/pull/4581) Fixed imxrt flexcan driver compilation error (incorrect variable scope)  

#### LPC17XX_40XX

#### NRF52

#### RP2040 
 * [#3917](https://github.com/apache/incubator-nuttx/pull/3917) arm/rp2040:USB device controller support   
 * [#3857](https://github.com/apache/incubator-nuttx/pull/3857) boards: rp2040: Add user gpio driver 
 * [#3996](https://github.com/apache/incubator-nuttx/pull/3996) Support for Waveshare Pico-LCD-1.x module
 * [#4086](https://github.com/apache/incubator-nuttx/pull/4086) Added PCF8574 backpack support to Raspberry Pi Pico  
 * [#4204](https://github.com/apache/incubator-nuttx/pull/4204) added st7735 LCD based support  
 * [#4289](https://github.com/apache/incubator-nuttx/pull/4289) Fixing BMP180 and INA219 in RP2040  

#### S32K1XX
 * [#4643](https://github.com/apache/incubator-nuttx/pull/4643) S32K1xx arch: Add (optional) support for SPI native/hardware chip select  
 * [#4634](https://github.com/apache/incubator-nuttx/pull/4634) S32K1XX arch: gpioread may also be used for output pins   
 * [#4592](https://github.com/apache/incubator-nuttx/pull/4592) S32K1XX: Add LPI2C slave support  
 * [#4541](https://github.com/apache/incubator-nuttx/pull/4541) S32K1XX EVB boards cleanup & update  
 * [#4578](https://github.com/apache/incubator-nuttx/pull/4578) S32K1XXEVB boards: Fix RGB LED output and add comments  
 * [#4533](https://github.com/apache/incubator-nuttx/pull/4533) S32k1xx: added PM support  
 * [#4596](https://github.com/apache/incubator-nuttx/pull/4596) S32K1XX: Add FlexIO registers  
 * [#4508](https://github.com/apache/incubator-nuttx/pull/4508) s32k1xx: added way to get the reset cause in a proc fs  
 * [#4560](https://github.com/apache/incubator-nuttx/pull/4560) RDDRONE-UAVCAN / UCANS32K146 boards cleanup & update  

#### SAM34
 * [#3732](https://github.com/apache/incubator-nuttx/pull/3732) board: Add support for Adafruit Circuit Express  
 * [#3840](https://github.com/apache/incubator-nuttx/pull/3840) Add ST7789 LCD controller support for SAMV71 XPlained Ultra board

#### STM32  
 * [#3944](https://github.com/apache/incubator-nuttx/pull/3944) boards/arm/stm32/nucleo-f446re: added support for DAC driver
 * [#3880](https://github.com/apache/incubator-nuttx/pull/3880) boards/arm/stm32/nucleo-f446re: added support for GPIO driver
 * [#3909](https://github.com/apache/incubator-nuttx/pull/3909) Added basic support for nucleo-g431kb board.
 * [#3922](https://github.com/apache/incubator-nuttx/pull/3922) Adds PWM example to nucleo-g431kb board.  
 * [#3914](https://github.com/apache/incubator-nuttx/pull/3914) boards: added support for EMW3162 Wi-Fi board
 * [#3878](https://github.com/apache/incubator-nuttx/pull/3878) Add FOC support for B-G431-ESC1 board   
 * [#3637](https://github.com/apache/incubator-nuttx/pull/3637) boards/arm/stm32/nucleo-f446re: added support for PWM  
 * [#3660](https://github.com/apache/incubator-nuttx/pull/3660) stm32_pwm: improvements for PULSECOUNT support  
 * [#4505](https://github.com/apache/incubator-nuttx/pull/4505) STM32 F4, F7, H7 USB OTG Device Ensure EP initialized to proper state on usb reset and configure  
 * [#4589](https://github.com/apache/incubator-nuttx/pull/4589) Fix stm32xx GPIO glitches from configuration bad order of operations  
 * [#4085](https://github.com/apache/incubator-nuttx/pull/4085) stm32,stm32f7,stm32h7: supported ETH MAC promiscuous mode  
 * [#4255](https://github.com/apache/incubator-nuttx/pull/4255) STM32 DAC Driver - Add support to DAC3  
 * [#3796](https://github.com/apache/incubator-nuttx/pull/3796) boards/arm/stm32/nucleo-f412zg/scripts/Make.defs: Replace EXTRADEFINES by EXTRAFLAGS  
 * [#4284](https://github.com/apache/incubator-nuttx/pull/4284) stm32_pmw: fix pwm_stop() function to enable multiple PWM start and stop  
 * [#4353](https://github.com/apache/incubator-nuttx/pull/4353) stm32/stm32_serial.c fix issue  
 * [#4244](https://github.com/apache/incubator-nuttx/pull/4244) STM32G4: add support for CORDIC math accelerator  
 * [#4437](https://github.com/apache/incubator-nuttx/pull/4437) stm32_serial.c: Don't fake a TX interrupt when interrupts are not suppressed
 * [#3863](https://github.com/apache/incubator-nuttx/pull/3863) boards/arm/stm32/nucleo-f446re: fixed wrong qetimer config name  
 * [#3952](https://github.com/apache/incubator-nuttx/pull/3952) SDIO IO_RW_EXTENDED command (CMD53) related fixes  
 * [#4597](https://github.com/apache/incubator-nuttx/pull/4597) Add LCD backpack support for ESP32 (devkit-c).  

#### STM32L4  
 * [#4534](https://github.com/apache/incubator-nuttx/pull/4534) STM32L4 LPUART support  

#### STM32F4

#### STM32F7 / STM32H7 
 * [#3646](https://github.com/apache/incubator-nuttx/pull/3646) boards/stm32f7: Add i2c and mpu60x0 support to nucleo-144 and fix bitmask bug in mpu60x0  
 * [#3650](https://github.com/apache/incubator-nuttx/pull/3650) stm32{H7|F7} Disables/Enabled the use of GPIO_OTG_ID pin  
 * [#3669](https://github.com/apache/incubator-nuttx/pull/3669) STM32 {F7|H7} Use 250 Ms Data path timeout, regardless of Card Clock frequency 
 * [#3651](https://github.com/apache/incubator-nuttx/pull/3651) Use inttypes in stm32{f7|h7}, Kinetis, s32k drivers.  
 * [#4524](https://github.com/apache/incubator-nuttx/pull/4524) stm32*7/stm32_serial.c: Don't fake a TX interrupt when interrupts are not suppressed 
 * [#4598](https://github.com/apache/incubator-nuttx/pull/4598) stm32h7:DMA_TRBUFF is DMA_SCR_TRBUFF  

#### KINETIS
 * [#4190](https://github.com/apache/incubator-nuttx/pull/4190) kinetis lpserial add RX DMA 
  
#### ARM
#### AVR32
 * [#3684](https://github.com/apache/incubator-nuttx/pull/) avr32dev1: USART1 RX: Reassign pin  

#### MIPS
#### PIC32
 * [#4264](https://github.com/apache/incubator-nuttx/pull/) boards: added a basic support for chipKIT Wi-FIRE board  

#### RISC-V 
 * [#3846](https://github.com/apache/incubator-nuttx/pull/3846) risc-v/rv32m1: Basic port to rv32m1 ri5cy
 * [#4146](https://github.com/apache/incubator-nuttx/pull/4146) risc-v/bl602: add boardctl support
 * [#3911](https://github.com/apache/incubator-nuttx/pull/3911) Add i2c driver to PolarFire SoC and Icicle board
 * [#3905](https://github.com/apache/incubator-nuttx/pull/3905) Add SPI driver to PolarFire SoC and Icicle board
 * [#3933](https://github.com/apache/incubator-nuttx/pull/3933) riscv/mpfs: add i2c reset handler
 * [#3920](https://github.com/apache/incubator-nuttx/pull/3920) add dma support for PolarFire SoC
 * [#4569](https://github.com/apache/incubator-nuttx/pull/4569)  MPFS emmcsd   

#### BL602
 * [#4010](https://github.com/apache/incubator-nuttx/pull/#46434010) boards/bl602: S32K1xx arch: Add (optional) support for SPI native/hardware chip selectFix uart_nx.c:419: undefined reference to `uart_bth4_register  

#### C906

#### ESP32-C3
 * [#3794](https://github.com/apache/incubator-nuttx/pull/3794) risc-v/esp32c3: Support ESP32-C3 RTC driver  
 * [#3883](https://github.com/apache/incubator-nuttx/pull/3883) risc-v/esp32c3: Support ESP32-C3 RSA accelerator  
 * [#4634#3881](https://github.com/apache/incubator-nuttx/pull/#46343881) S32K1XX archrisc-v/esp32c3: gpioreadSupport may also be used for output pins  ESP32-C3 efuse   
 * [#4592#3935](https://github.com/apache/incubator-nuttx/pull/#45923935) S32K1XXrisc-v/esp32c3: AddSupport LPI2CESP32-C3 slaveSHA support  accelerator
 * [#4541#3882](https://github.com/apache/incubator-nuttx/pull/#45413882) S32K1XX EVB boards cleanup & update  riscv/esp32c3: Use the RTC memory as another heap.
 * [#4578#3945](https://github.com/apache/incubator-nuttx/pull/#45783945) S32K1XXEVB boards/esp32c3: FixAdd RGB LED output and add comments  romfs configuration
 * [#4533#3925](https://github.com/apache/incubator-nuttx/pull/#45333925) S32k1xxrisc-v/esp32-c3: addedAdds I2C PMpolled support  
 * [#4596#3823](https://github.com/apache/incubator-nuttx/pull/#45963823) S32K1XXrisc-v/esp32-c3: Add support for FlexIOHW registersflow control. 
 * [#4508#3822](https://github.com/apache/incubator-nuttx/pull/#4508) s32k1xx: added way to get the reset cause in a proc fs  

#### SAM34/pull/3822) ESP32-C3: Add DMA support for SPI Slave
 * [#3732#3543](https://github.com/apache/incubator-nuttx/pull/#37323543) boardfeat(esp32c3): AddSupport supportesp32c3 forble Adafruitfunction Circuit Express  
 * [#3840#3667](https://github.com/apache/incubator-nuttx/pull/#3840)3667) risc-v/esp32c3: Add ST7789 LCD controller support for SAMV71 XPlained Ultra board

#### STM32  
 * [#3944ESP32-C3 (G)DMA driver and testing  
 * [#4605](https://github.com/apache/incubator-nuttx/pull/#39444605) boards/arm/stm32/nucleo-f446re: added support for DAC driverrisc-v/esp32-c3: improvements and fix to esp32c3_rt_timer.c  
 * [#3880#4611](https://github.com/apache/incubator-nuttx/pull/#38804611) boards/arm/stm32/nucleo-f446reESP32-C3: addedAdd support for GPIO driver booting NuttX from MCUboot  
 * [#3909#3656](https://github.com/apache/incubator-nuttx/pull/#39093656) Added basic support for nucleo-g431kb board.risc-v/esp32-c3: Adds freerun wrapper 
 * [#3922#4574](https://github.com/apache/incubator-nuttx/pull/#39224574) esp32c3-devkit: AddsAdd PWMboard exampleprofile to nucleo-g431kb board. use LVGL on GC9A01 display  
 * [#3914#3810](https://github.com/apache/incubator-nuttx/pull/#39143810) boardsrisc-v/esp32c3: addedFix overwriting support for EMW3162 Wi-Fi boardof registered-but-disabled interrupts  
 * [#3878#3797](https://github.com/apache/incubator-nuttx/pull/#38783797) ESP32-C3: Add FOCSPI supportSlave for B-G431-ESC1 board   peripheral driver  
 * [#3637#4568](https://github.com/apache/incubator-nuttx/pull/#36374568) boards/arm/stm32/nucleo-f446reesp32c3: addedadd supportESP32C3 forLCD PWMdrivers  
 * [#3660#4553](https://github.com/apache/incubator-nuttx/pull/#36604553) stm32_pwmrisc-v/esp32c3: improvementsfix forpwm PULSECOUNTdriver supportbug  
 * [#4505#4500](https://github.com/apache/incubator-nuttx/pull/#4505) STM32 F4, F7, H7 USB OTG Device Ensure EP initialized to proper state on usb reset and configure  4500) risc-v/esp32-c3: refactor the Wi-Fi board logic.   
 * [#4589#3679](https://github.com/apache/incubator-nuttx/pull/#45893679) Fix stm32xx GPIO glitches from configuration bad order of operations  risc-v/esp32c3: Support ESP32-C3 PM standby and sleep  
 * [#4085#3766](https://github.com/apache/incubator-nuttx/pull/#40853766) stm32,stm32f7,stm32h7riscv/esp32c3: supportedAdd ETHESP32-C3 MACAES promiscuous modedriver  
 * [#4255#3750](https://github.com/apache/incubator-nuttx/pull/#42553750) STM32 DAC Driver - Add support to DAC3riscv/esp32c3: Support SPI Flash encryption read/write  
 * [#3796#3735](https://github.com/apache/incubator-nuttx/pull/#37963735) boards/arm/stm32/nucleo-f412zg/scripts/Make.defs: Replace EXTRADEFINES by EXTRAFLAGSriscv/esp32c3: Add ESP32-C3 ADC driver  
 * [#4284#3715](https://github.com/apache/incubator-nuttx/pull/#42843715) stm32_pmwrisc-v/esp32c3: fix pwm_stop() function to enable multiple PWM start and stopSupport ESP32-C3 auto-sleep  
 * [#4353#4239](https://github.com/apache/incubator-nuttx/pull/#43534239) stm32/stm32_serial.c fix issuerisc-v/esp32-c3: Adds systimer support and make rt_timer rely on it  
 * [#4244#3694](https://github.com/apache/incubator-nuttx/pull/#42443694) STM32G4risc-v/esp32c3: addAdd support for DMA transfers CORDICon mathSPI acceleratordriver  
 * [#4437#3697](https://github.com/apache/incubator-nuttx/pull/#44373697) stm32_serial.criscv/esp32c3: Don'tFix fakeRT atimer TXissues interrupt when interrupts are not suppressed
 * [#3863#3906](https://github.com/apache/incubator-nuttx/pull/#38633906) boards/arm/stm32/nucleo-f446re: fixed wrong qetimer config name  

#### STM32L4risc-v/esp32c3_wifi_adapter.c: Remove a config that's only used in Xtensa chips.   
 * [#4534#3701](https://github.com/apache/incubator-nuttx/pull/#45343701) STM32L4 LPUART support  

#### STM32F4

#### STM32F7 / STM32H7 
 * [#3646riscv/esp32c3: Add ESP32C3 LEDC(PWM) driver  
 * [#3854](https://github.com/apache/incubator-nuttx/pull/#36463854) boards/stm32f7ESP32-C3: AddSmall i2cclean andup mpu60x0on support to nucleo-144 and fix bitmask bug in mpu60x0  IRQ functions  
 * [#3650#4006](https://github.com/apache/incubator-nuttx/pull/#3650) stm32{H7|F7} Disables/Enabled4006) risc-v/esp32c3: Notifies networking layer whether the usecarrier of GPIO_OTG_ID pinis available  
 * [#3669#3788](https://github.com/apache/incubator-nuttx/pull/#36693788) STM32 {F7|H7} Use 250 Ms Data path timeout, regardless of Card Clock frequency ESP32-C3: Fix configuration of TX Burst support for GDMA  
 * [#3651#4040](https://github.com/apache/incubator-nuttx/pull/#36514040) Use inttypes in stm32{f7|h7}, Kinetis, s32k drivers.  risc-v/esp32c3: Fix some ESP32-C3 BLE driver issues 
 * [#4524#4082](https://github.com/apache/incubator-nuttx/pull/#45244082) stm32*7/stm32_serial.c: Don't fake a TX interrupt when interrupts are not suppressedboards/esp32c3-devkit: Support mounting SPI Flash MTD to littleFS  
 * [#4598#4075](https://github.com/apache/incubator-nuttx/pull/#45984075) stm32h7:DMA_TRBUFF is DMA_SCR_TRBUFF  

#### KINETISrisc-v/esp32c3: Add board_ioctl and board_uniqueid  
 * [#4190#4092](https://github.com/apache/incubator-nuttx/pull/#41904092) kinetis lpserial add RX DMA  

#### RISC-Vrisc-v/esp32c3: Use onexit to free thread private semaphore  
 * [#3846#3971](https://github.com/apache/incubator-nuttx/pull/#38463971) risc-v/rv32m1: Basic port to rv32m1 ri5cyboards/riscv/esp32c3: Rename the iram_0_2 segment to irom_0_0 to avoid confusions.  
 * [#4146#4141](https://github.com/apache/incubator-nuttx/pull/#41464141) risc-v/bl602: add boardctl supportesp32-c3: Use systimer 0 to RTOS TICK  
 * [#3911#3793](https://github.com/apache/incubator-nuttx/pull/#39113793) Add i2c driver to PolarFire SoC and Icicle boardesp32&esp32c3/wifi: Support specific channel and bssid scan  
 * [#3905#4162](https://github.com/apache/incubator-nuttx/pull/#39054162) Add SPI driver to PolarFire SoC and Icicle boardrisc-v/esp32c3: Fix some ESP32-C3 Wi-Fi driver issues 
 * [#3933#4169](https://github.com/apache/incubator-nuttx/pull/#39334169) riscv/mpfs: add i2c reset handlerrisc-v/esp32-c3: Makes output readable and rmv unnecessary var.  
 * [#3920#4314](https://github.com/apache/incubator-nuttx/pull/#39204314) add dmarisc-v/esp32-c3: Complete the support for PolarFireRWDT  SoC

#### BL602XTENSA 
 * [#4010#4590](https://github.com/apache/incubator-nuttx/pull/#40104590) boards/bl602: Fix uart_nx.c:419: undefined reference to `uart_bth4_register  

#### C906

#### ESP32C3[Xtensa/RISC-V] Remove FAR and CODE qualifiers from arch-specific files  
 * [#3794#4187](https://github.com/apache/incubator-nuttx/pull/#3794) risc-v/esp32c3: Support ESP32-C3 RTC driver4187) Fix xtensa_btdump() to look at the exception frame  
 * [#3883#4556](https://github.com/apache/incubator-nuttx/pull/#38834556) risc-v/esp32c3: Support ESP32-C3 RSA acceleratorxtensa:backtrace: flush to stack when in interrupt  
 * [#3881#3939](https://github.com/apache/incubator-nuttx/pull/#38813939) risc-v/esp32c3: Support ESP32-C3 efuse  Fix xtensa  
 * [#3935#4531](https://github.com/apache/incubator-nuttx/pull/#39354531) risc-v/esp32c3: Support ESP32-C3 SHA acceleratorxtensa/irq.h: Fixes the routine that clears the processor interrupt  
 * [#3882#4278](https://github.com/apache/incubator-nuttx/pull/#38824278) riscvxtensa/esp32c3common: Use the RTC memory as another heap. save sp before overwriting in level2/3/4 handler and typo fix  
 * [#3945#4311](https://github.com/apache/incubator-nuttx/pull/#39454311) boards/esp32c3: Add romfs configurationxtensa:coproc: fix XTENSA_CP_ALLSET error in some case  
 * [#3925#3768](https://github.com/apache/incubator-nuttx/pull/#3925) risc-v/esp32-c3: Adds I2C polled support3768) xtensa: Fixes names of architecture serial functions  

#### ESP32
 * [#3823#3940](https://github.com/apache/incubator-nuttx/pull/#38233940) risc-vxtensa/esp32-c3: AddSupport supportESP32 for HW flow control. RTC driver
 * [#3822#4003](https://github.com/apache/incubator-nuttx/pull/#38224003) ESP32-C3xtensa/esp32: AddAdds DMA support for SPI SlaveSERIAL_TXDMA.
 * [#3543#3912](https://github.com/apache/incubator-nuttx/pull/#35433912) feat(esp32c3)xtensa/esp32: SupportAdds esp32c3I2C blepolled function support.
 * [#3667#3803](https://github.com/apache/incubator-nuttx/pull/#36673803) risc-v/esp32c3: AddAdd support to ESP32-C3 (G)DMA driverS2 and testing  ESP32S2-SAOLA-1 Board
 * [#4605#3824](https://github.com/apache/incubator-nuttx/pull/#46053824) risc-vxtensa/esp32-c3s2: improvementsAdd andsupport fixfor to esp32c3_rt_timer.c  serial HW flow control.
 * [#4611#4604](https://github.com/apache/incubator-nuttx/pull/#4611) ESP32-C3: Add support for booting NuttX from MCUboot4604) xtensa/esp32: Enable build system to download or build binaries from source  
 * [#3656#3642](https://github.com/apache/incubator-nuttx/pull/#36563642) risc-vxtensa/esp32-c3: Addsseveral freerunuart wrapper fixes
 * [#4574#3648](https://github.com/apache/incubator-nuttx/pull/#45743648) esp32c3-devkittools/esp32/mk_qemu_img.sh: AddRefactor boardthe profiledd tocommands. use LVGL on GC9A01 display  
 * [#3810#4625](https://github.com/apache/incubator-nuttx/pull/#38104625) riscesp32-vc3/esp32c3esp32-s2: Fix the overwritingsequence of registered-but-disabled interruptscommands to set the alarm value on rt timer.  
 * [#3797#4610](https://github.com/apache/incubator-nuttx/pull/#37974610) ESP32-C3S2: Add support for SPIbooting SlaveNuttX peripheralfrom driverMCUboot  
 * [#4568#3678](https://github.com/apache/incubator-nuttx/pull/#45683678) boardsxtensa/esp32c3esp32: add ESP32C3 LCD drivers  Support auto-sleep  
 * [#4553#4532](https://github.com/apache/incubator-nuttx/pull/#45534532) risc-v/esp32c3: fix pwm driver bugboards/esp32s2-saola-1: Add implementation for BOARDIOC_RESET interface  
 * [#4500#4275](https://github.com/apache/incubator-nuttx/pull/#45004275) risc-vxtensa/esp32-c3: refactorKeep track of the CPU where the Wi-Fiinterrupt boardwas logicattached.   
 * [#3679#4295](https://github.com/apache/incubator-nuttx/pull/#36794295) risc-vxtensa/esp32c3esp32: Support ESP32-C3 PM standby and sleepEnable boot from Espressif's port of MCUboot  
 * [#3766#4315](https://github.com/apache/incubator-nuttx/pull/#37664315) riscvxtensa/esp32c3esp32: AddFix ESP32-C3issues AESon driverRWDT  
 * [#3750#4366](https://github.com/apache/incubator-nuttx/pull/#37504366) riscvxtensa/esp32c3esp32: SupportUse SPIIRQ Flashto encryption readenable/writedisable interrupts 
 * [#3735#4427](https://github.com/apache/incubator-nuttx/pull/#37354427) riscv/esp32c3esp32/ttgo_lora_esp32: Add ESP32-C3 ADC driversupport to SSD1306 OLED display  
 * [#3715#4388](https://github.com/apache/incubator-nuttx/pull/#37154388) esp32: risc-v/esp32c3: Support ESP32-C3 auto-sleepRe-organize the interrupt handling process to correctly handle the SMP case  
 * [#4239#4401](https://github.com/apache/incubator-nuttx/pull/#42394401) risc-vxtensa/esp32-c3s2: Adds systimer support andto makethe rt_timer relydriver on it  
 * [#3694#4545](https://github.com/apache/incubator-nuttx/pull/#36944545) riscesp32-v/esp32c3wrover: Add support forto DMALCD1602 transferswith onI2C SPIBackpack driver  
 * [#3697#4587](https://github.com/apache/incubator-nuttx/pull/#36974587) riscvxtensa/esp32c3esp32-s2: FixAdds RTfreerun timer issueswrapper  
 * [#3906#4139](https://github.com/apache/incubator-nuttx/pull/#39064139) risc-v/esp32c3_wifi_adapter.cxtensa/esp32: RemoveFixes a config that's only used in Xtensa chipstermios issue.   
 * [#3701#4586](https://github.com/apache/incubator-nuttx/pull/#37014586) riscvxtensa/esp32c3esp32-s2: AddAdds ESP32C3 LEDC(PWM)oneshot device driver support  
 * [#3854#4570](https://github.com/apache/incubator-nuttx/pull/#38544570) ESP32-C3esp32_spiflash.c: SmallCorrectly cleandisable upAPP's on IRQ functions CPU cache. 
 * [#4006#4509](https://github.com/apache/incubator-nuttx/pull/#4006) risc-v/esp32c34509) esp32: NotifiesAdd networkinginitial layersupport whetherto theBluetooth carrierLow isEnergy available  
 * [#3788#4411](https://github.com/apache/incubator-nuttx/pull/#37884411) ESP32-C3: Fix configuration of TX Burst support for GDMAesp32/softap: Enable the WPA2 by default to ask user password  
 * [#4040#4412](https://github.com/apache/incubator-nuttx/pull/#40404412) risc-vboards/esp32c3esp32: FixAdd somebasic ESP32-C3support BLE driver issuesto TTGO-LoRa-SX1276-ESP32  
 * [#4082#4585](https://github.com/apache/incubator-nuttx/pull/#40824585) boardsxtensa/esp32c3esp32-devkits2: SupportAdds support mountingto SPIrt_timer Flashand MTDsystimer to littleFSESP32-S2.  
 * [#4075#4170](https://github.com/apache/incubator-nuttx/pull/#40754170) risc-vxtensa/esp32c3esp32: Add board_ioctlMake output readable and board_uniqueidrmv unnecessary var.  
 * [#4092#4195](https://github.com/apache/incubator-nuttx/pull/#40924195) risc-v/esp32c3: Use onexitesp32_allocateheap.c: Remove the amount reserved to freehimem threadfrom privatethe semaphoreheap.  
 * [#3971#4232](https://github.com/apache/incubator-nuttx/pull/#39714232) boardsxtensa/riscv/esp32c3esp32: RenameEnable the iram_0_2 segment to irom_0_0 to avoid confusions.  configuration of GPIO pad's drive strength  
 * [#4141#4240](https://github.com/apache/incubator-nuttx/pull/#41414240) risc-vxtensa/esp32-c3: Useexpose systimerSPI2 0as toa RTOSchar TICKdriver  
 * [#3793#4253](https://github.com/apache/incubator-nuttx/pull/#37934253) xtensa/esp32&esp32c3/wifi: Enable Supportthe allocation specificof channelmultiple andSPI bssidFlash scanpartitions  
 * [#4162#4338](https://github.com/apache/incubator-nuttx/pull/#41624338) risc-v/esp32c3: Fix some ESP32-C3 Wi-Fi driver issuestools/esp32/Config.mk: Allow ESPTOOL_BINDIR to be omitted when flashing the board 
 * [#4169#3938](https://github.com/apache/incubator-nuttx/pull/#41693938) risc-v/esp32-c3: Makes output readable and rmv unnecessary var.esp32&esp32c3/wifi: Fix the issues of Wi-Fi configuration being overwritten  
 * [#4314#3969](https://github.com/apache/incubator-nuttx/pull/#43143969) risc-vboards/esp32-c3: CompleteRefactor the support for RWDT  

#### XTENSAdifferent linker scripts and delete old OpenOCD config files.  
 * [#4590#3975](https://github.com/apache/incubator-nuttx/pull/#45903975) [Xtensa/RISC-V] Remove FAR and CODE qualifiers from arch-specific filesxtensa/esp32: Fix RTC WDT deinitialization on start routine  
 * [#4187#3987](https://github.com/apache/incubator-nuttx/pull/#41873987) Fix xtensa_btdump() to look at the exception frame  tools/esp32/backtrace.gdbscript: don't modify registers  
 * [#4556#4001](https://github.com/apache/incubator-nuttx/pull/#45564001) xtensa:backtrace/esp32: flushSupport to stack when in interruptselect different clock source for RTC controller and close TODOs.  
 * [#3939#4073](https://github.com/apache/incubator-nuttx/pull/#39394073) xtensa/esp32: Fix xtensa uart 2 issue.  
 * [#4531#3800](https://github.com/apache/incubator-nuttx/pull/#45313800) arch/xtensa/irq.h: Fixes the routine that clears the processor interrupt  esp32_emac.c: Call phy_enable_interrupt correctly.  
 * [#4278#4157](https://github.com/apache/incubator-nuttx/pull/#42784157) xtensaboards/commonesp32: saveRefactor spthe beforelinker overwritingscripts in level2/3/4 handler and typo fixinto the common directory.  
 * [#4311#4249](https://github.com/apache/incubator-nuttx/pull/#43114249) xtensa/esp32-s2:coproc: fix XTENSA_CP_ALLSET error in some caseAdds GPIO board logic to esp32s2-saola-1.  
 * [#3768#4471](https://github.com/apache/incubator-nuttx/pull/#37684471) xtensa/esp32: FixesWi-Fi namesboard oflogic architecturerefactoring. serial functions  

#### ESP32
 * [#3940#4497](https://github.com/apache/incubator-nuttx/pull/#39404497) xtensa/esp32_serial.c: Support ESP32 RTC driver Don't fake an interrupt when interrupts are not suppressed.  
 * [#4003#3829](https://github.com/apache/incubator-nuttx/pull/#40033829) xtensa/esp32: AddsFixes support for SERIAL_TXDMA. UART HW flow control  
 * [#3912#3943](https://github.com/apache/incubator-nuttx/pull/#39123943) xtensa/esp32: Adds I2C polled support. I2C Bit banging reset  
 * [#3803#3960](https://github.com/apache/incubator-nuttx/pull/#38033960) Add support to ESP32-S2 and ESP32S2-SAOLA-1 Boardxtensa/esp32: Refactor the text heap and add RTC memory to it   
 * [#3824#4646](https://github.com/apache/incubator-nuttx/pull/#3824) xtensa/esp32-s2: Add support for serial HW flow control.4646) Add example to use BLE and WiFi at same time  

## File System

### Bug Fixes 
 * [#4604#3653](https://github.com/apache/incubator-nuttx/pull/#46043653) xtensa/esp32fs:cromf EnableUse buildinttypes systemin to download or build binaries from source  printing macros  
 * [#3642#4573](https://github.com/apache/incubator-nuttx/pull/#36424573) xtensa/esp32: several uart fixesfs:procfs: add waiting_paging_fill state names  
 * [#3648#3745](https://github.com/apache/incubator-nuttx/pull/#36483745) toolsfs/esp32vfs/mk_qemu_img.sh: Refactor the dd commands.fs_select.c: Fix select() to return EINVAL when nfds is negative  
 * [#4625#3740](https://github.com/apache/incubator-nuttx/pull/#46253740) esp32-c3/esp32-s2fs/fat/fat32util.c: Fix thecalculation sequence of commandscurrent tosector setwith theinvalid alarmcl… value on rt timer.  
 * [#4610#3724](https://github.com/apache/incubator-nuttx/pull/#46103724) ESP32-S2: Add support for booting NuttX from MCUbootfs/hostfs: fix bug about getting error file size by fstat  
 * [#3678#3785](https://github.com/apache/incubator-nuttx/pull/#3678) xtensa/esp32: Support auto-sleep3785) FAT32 fix skipping sectors at computing the number of free clusters  
 * [#4532#4171](https://github.com/apache/incubator-nuttx/pull/#45324171) boards/esp32s2-saola-1fs/tmpfs: AddHandle implementationthe for BOARDIOC_RESET interfacetail '/' correctly  
 * [#4275#4539](https://github.com/apache/incubator-nuttx/pull/#42754539) xtensavfs/esp32poll: Keep trackcorrect of the CPUreturn whereevent theif interruptinode washas attached.closed  
 * [#4295#3760](https://github.com/apache/incubator-nuttx/pull/#42953760) xtensa/esp32: Enable boot from Espressif's port of MCUbootFix calculation of free clusters at mounting a fat partition  
 * [#4315#4012](https://github.com/apache/incubator-nuttx/pull/#43154012) xtensa/esp32fs: move Fixout issuesnx_close onfrom RWDTfilelock  
 * [#4366#3974](https://github.com/apache/incubator-nuttx/pull/#43663974) xtensafs/esp32tmpfs: Use IRQ to enable/disable interrupts Fix the memory corruption when reallocate tmpfs_directory_s  
 * [#4427#3986](https://github.com/apache/incubator-nuttx/pull/#44273986) esp32/ttgo_lora_esp32fs: Addnfs: supportReconnect to SSD1306 OLED displaythe NFS server in TCP mode  
 * [#4388#4031](https://github.com/apache/incubator-nuttx/pull/#43884031) esp32fs/fs_dup2: Re-organize the interrupt handling process to correctly handle the SMP case(sanity check )correct check before calling dup  
 * [#4401#4033](https://github.com/apache/incubator-nuttx/pull/#44014033) xtensafs/esp32-s2procfs: Addsadd StackAlloc supportfield tofor thetask timerstack driverinfo  
 * [#4545#4061](https://github.com/apache/incubator-nuttx/pull/#45454061) esp32-wrover: Add support to LCD1602 with I2C BackpackFAT32 kconfig entry to enforce computation of free clusters at mount  
 * [#4587#4079](https://github.com/apache/incubator-nuttx/pull/#45874079) xtensafs/esp32-s2procfs: Adds freerun timer wrapperlayout the output of meminfo correctly  
 * [#4139#4093](https://github.com/apache/incubator-nuttx/pull/#41394093) xtensa/esp32: Fixes termios issue.fs: Move the default ioctl handle from nx_vioctl to file_vioctl  
 * [#4586#4097](https://github.com/apache/incubator-nuttx/pull/#45864097) xtensa/esp32-s2fs: Adds oneshot device driver supportRemove the inernal st_count field from struct stat  
 * [#4570#4101](https://github.com/apache/incubator-nuttx/pull/#45704101) esp32_spiflash.c: Correctly disable APP's CPU cache.fs: pseudorename should call inode_release in the error path  
 * [#4509#4118](https://github.com/apache/incubator-nuttx/pull/#45094118) esp32: Add initial support to Bluetooth Low Energyfs: Support the root file system attributes(mode, uid, gid and time)  
 * [#4411#4119](https://github.com/apache/incubator-nuttx/pull/#44114119) esp32/softapfs: Enablefstat theshouldn't WPA2follow bythe default to ask user password  symbol link  
 * [#4412#4121](https://github.com/apache/incubator-nuttx/pull/#44124121) boards/esp32: Add basic support to TTGO-LoRa-SX1276-ESP32vfs: stat_recursive should return -ENOSYS if stat callback is NULL  
 * [#4585#4123](https://github.com/apache/incubator-nuttx/pull/#45854123) xtensa/esp32-s2nuttx: Adds support to rt_timer and systimer to ESP32-S2.littlefs_close should return value bugfix  
 * [#4170#4153](https://github.com/apache/incubator-nuttx/pull/#41704153) xtensa/esp32fs: MakeAdd outputfchstat readableand andchstat rmvcallback unnecessary var.into mountpt_operations  
 * [#4195#4165](https://github.com/apache/incubator-nuttx/pull/#41954165) esp32_allocateheap.cfs: Removeshould theonly amountapply reservedumask to himemthe from the heap.userspace caller  
 * [#4232#4174](https://github.com/apache/incubator-nuttx/pull/#42324174) xtensa/esp32: Enable configuration of GPIO pad's drive strength  Fix nfs and statfs  
 * [#4240#4193](https://github.com/apache/incubator-nuttx/pull/#42404193) xtensa/esp32: expose SPI2 as a char driverfs: Change off_t and related types to int64_t if long long is supported  
 * [#4253#4224](https://github.com/apache/incubator-nuttx/pull/#42534224) xtensafs/esp32inode: Enableadd thesanity allocationcheck offor multipleinode SPIto Flashavoid partitionsnullpointer  
 * [#4338#4263](https://github.com/apache/incubator-nuttx/pull/#43384263) tools/esp32/Config.mkfs: AllowSave ESPTOOL_BINDIRumask to be omitted when flashing the board tls_task_s for non kernel mode only  
 * [#3938#4300](https://github.com/apache/incubator-nuttx/pull/#39384300) esp32&esp32c3/wififs: FixAdd theutimens issues of Wi-Fi configuration being overwrittenand lutimens  
 * [#3969#4307](https://github.com/apache/incubator-nuttx/pull/#3969) boards/esp32: Refactor the different linker scripts4307) fs/userfs: Support fchstat and delete old OpenOCD config files.  chstat callback  
 * [#3975#4308](https://github.com/apache/incubator-nuttx/pull/#39754308) xtensafs/esp32unionfs: FixSupport RTCfchstat WDTand deinitialization on start routinechstat callback  
 * [#3987#4309](https://github.com/apache/incubator-nuttx/pull/#39874309) tools/esp32/backtrace.gdbscript: don't modify registersfs/nfs: Support fchstat and chstat callback  
 * [#4001#4330](https://github.com/apache/incubator-nuttx/pull/#40014330) xtensafs/esp32littlefs: Supportimprove tolittlefs selectflash differentblock clockerase sourcebalance forperformance RTC controller and close TODOs.  
 * [#4073#4332](https://github.com/apache/incubator-nuttx/pull/#40734332) xtensa/esp32fs: FixSupport uart64bit 2 issue.in register_[block|mtd]partition  
 * [#3800#4333](https://github.com/apache/incubator-nuttx/pull/#38004333) arch/xtensa/esp32_emac.cfs/partition: CallSupport phy_enable_interrupt correctly.BIOC_PARTINFO  
 * [#4157#4321](https://github.com/apache/incubator-nuttx/pull/#4157) boards/esp32: Refactor the linker scripts into the common directory.4321) fs: Remove endsector from partition_info_s  
 * [#4249#3680](https://github.com/apache/incubator-nuttx/pull/#42493680) xtensafs/esp32-s2: Adds GPIO board logic to esp32s2-saola-1.eventfd: add EVENT_FD_POLL as a Kconfig dependency for EVENT_FD_NPOLLWAITERS  
 * [#4471#4514](https://github.com/apache/incubator-nuttx/pull/#44714514) xtensafs/esp32ioctl: Wi-Fi board logic refactoring.using FIOC_FILEPATH instead of FIOC_FILENAME  
 * [#4497#4511](https://github.com/apache/incubator-nuttx/pull/#44974511) esp32inode_serial.cgetpath: Don't fake an interrupt when interrupts are not suppressed. correct get path whether path buffer is clean or not.   
 * [#3829#4276](https://github.com/apache/incubator-nuttx/pull/#38294276) xtensa/esp32: Fixes support for UART HW flow controlFix status register reading in ramtron_read()  
 * [#3943#4290](https://github.com/apache/incubator-nuttx/pull/#39434290) xtensacmd/esp32df: Fix Addsthe abnormal I2Coutput Bitafter bangingoff_t resetchange  
 * [#3960#4133](https://github.com/apache/incubator-nuttx/pull/#39604133) xtensa/esp32profs: RefactorPrint theStackAlloc text heap and add RTC memory to it  

#### TIVA

### **Minor Board Changes**

#### ARM  

#### CXD56  

#### Xtensa

## File System

### Bug Fixes

by procfs_snprintf  

### Significant Improvements

## Networking

### Improvements 
 * [#4538](https://github.com/apache/incubator-nuttx/pull/#45384538) sys/socket/scm: add more socket message control helper 
 * [#4080](https://github.com/apache/incubator-nuttx/pull/#40804080) net/socket: add SO_SNDBUF support 
 * [#4116](https://github.com/apache/incubator-nuttx/pull/#41164116) net: Add file_socket function 
 * [#4135](https://github.com/apache/incubator-nuttx/pull/#41354135) net/rpmsg: add multi-iov support  
 * [#4179](https://github.com/apache/incubator-nuttx/pull/#41794179) Update socket rpmsg  
 * [#4355](https://github.com/apache/incubator-nuttx/pull/#43554355) net/rpmsg: add nonblock connect(2) support  
 * [#4356](https://github.com/apache/incubator-nuttx/pull/#43564356) net/local: add nonblock connect(2) support  
 * [#4357](https://github.com/apache/incubator-nuttx/pull/#43574357) net/tcp: add nonblock connect(2) support  
 * [#4070](https://github.com/apache/incubator-nuttx/pull/#40704070) net/tcp: add window scale support  
 * [#3926](https://github.com/apache/incubator-nuttx/pull/#39263926) net/inet: add support of FIONREAD  
 * [#3896](https://github.com/apache/incubator-nuttx/pull/#38963896) net/local: add local_nextconn() helper  
 * [#3961](https://github.com/apache/incubator-nuttx/pull/#39613961) net: Add if_nameindex and if_freenameindex API  
 * [#4069](https://github.com/apache/incubator-nuttx/pull/#40694069) net/socket: add SO_RCVBUF support  
 * [#4071](https://github.com/apache/incubator-nuttx/pull/#40714071) net/local: add AF_[UNIX|LOCAL] socketpair support  
 * [#4540](https://github.com/apache/incubator-nuttx/pull/#45404540) net/local: add FIONSPACE support  
 * [#4593](https://github.com/apache/incubator-nuttx/pull/#45934593) net/local: add socket message control support  

### Bug Fixes
 * [#4602](https://github.com/apache/incubator-nuttx/pull/#46024602) net/dup: only start tcp monitor on INET domain  
 * [#4649](https://github.com/apache/incubator-nuttx/pull/#46494649) net: always compile listen.c and accept.c when enable CONFIG_NET  
 * [#4603](https://github.com/apache/incubator-nuttx/pull/#46034603) [SECURITY]net/tcp: sanity check for the listen address  
 * [#4579](https://github.com/apache/incubator-nuttx/pull/#45794579) net/devif/devif_callback.c: made the connection event list doubly linked  
 * [#4433](https://github.com/apache/incubator-nuttx/pull/#44334433) net/devif/devif_callback.c: corrected the connection event list to work as FIFO instead of LIFO  
 * [#3776](https://github.com/apache/incubator-nuttx/pull/#37763776) net/dev: link the net device as order of registration  
 * [#3758](https://github.com/apache/incubator-nuttx/pull/#37583758) net/tcp/retransmit: recounter the ack counter during obtain newdata  
 * [#3723](https://github.com/apache/incubator-nuttx/pull/#37233723) net: Forward socket option only when the socket type is usrsock  
 * [#4480](https://github.com/apache/incubator-nuttx/pull/#44804480) net: utils: Remove critical section for SMP in net_lock.c  
 * [#3707](https://github.com/apache/incubator-nuttx/pull/#37073707) Fix NFS over TCP  
 * [#3818](https://github.com/apache/incubator-nuttx/pull/#38183818) tcp: recv window update improvement  
 * [#3655](https://github.com/apache/incubator-nuttx/pull/#36553655) Attempt to fix race condition reported in issue #3647  
 * [#3865](https://github.com/apache/incubator-nuttx/pull/#38653865) Fix tcp seq wrap around issues  
 * [#3889](https://github.com/apache/incubator-nuttx/pull/#38893889) net/dns:fix unaligned access in dns query  
 * [#3894](https://github.com/apache/incubator-nuttx/pull/#38943894) net/telnet: fix a potential busyloop if rxbuffer writes faster than read  
 * [#3934](https://github.com/apache/incubator-nuttx/pull/#39343934) net/local: Remove all HAVE_LOCAL_POLL reference  
 * [#3755](https://github.com/apache/incubator-nuttx/pull/#37553755) net/icmp: icmp bug fix and enhancement  
 * [#3993](https://github.com/apache/incubator-nuttx/pull/#39933993) tcp_reset: Don't copy the peer window  
 * [#3994](https://github.com/apache/incubator-nuttx/pull/#39943994) tcp: always responds to keep-alive segments  
 * [#3995](https://github.com/apache/incubator-nuttx/pull/#39953995) fix active close for CONFIG_NET_TCP_WRITE_BUFFERS  
 * [#3999](https://github.com/apache/incubator-nuttx/pull/#39993999) some follow-up patches for the recent tcp readahead  
 * [#4017](https://github.com/apache/incubator-nuttx/pull/#40174017) rpmsg_socket: fix rpmsg_socket_device_destroy() multi-access  
 * [#4022](https://github.com/apache/incubator-nuttx/pull/#40224022) tcp_close: Fix a race with passive close  
 * [#3966](https://github.com/apache/incubator-nuttx/pull/#39663966) net: Fix: left shift of 1 by 31 places cannot be represented in type long int  
 * [#3948](https://github.com/apache/incubator-nuttx/pull/#39483948) TCP: simplify readahead  
 * [#3114](https://github.com/apache/incubator-nuttx/pull/#31143114) usrsock/recv: guarantee all data is received before close  
 * [#3756](https://github.com/apache/incubator-nuttx/pull/#37563756) net/tcp: set/get TCP_KEEPINTVL/IDLE value as BSD style  
 * [#3895](https://github.com/apache/incubator-nuttx/pull/#38953895) net/accept: alloc the accept fd after accept success  
 * [#3937](https://github.com/apache/incubator-nuttx/pull/#39373937) dns_recv_response: Fix IPv6 address in an ninfo()  
 * [#4408](https://github.com/apache/incubator-nuttx/pull/#44084408) Fix up that local socket will be endless loop when write data size more than the fifo size.  
 * [#4517](https://github.com/apache/incubator-nuttx/pull/#45174517) rpmsg_socket: add prefix "rpmsg-socket" for the name of rpmsg endpoint  
 * [#4537](https://github.com/apache/incubator-nuttx/pull/#45374537) net/udp: fix buffer release handling on failed buffer alloc  
 * [#4120](https://github.com/apache/incubator-nuttx/pull/#41204120) net/tcp: tcp_sendfile need restore the file location at the end  
 * [#4134](https://github.com/apache/incubator-nuttx/pull/#41344134) net/tcp: only print the error when disable the TCP_NODELAY  
 * [#4142](https://github.com/apache/incubator-nuttx/pull/#41424142) tcp_send_buffered: throttle IOB allocations for send  
 * [#4159](https://github.com/apache/incubator-nuttx/pull/#41594159) tcp_send_buffered.c: Fix broken retransmit  
 * [#4126](https://github.com/apache/incubator-nuttx/pull/#41264126) include/netinet: Add missing IP_TTL definition  
 * [#4197](https://github.com/apache/incubator-nuttx/pull/#41974197) local/stream: remove preamble header in stream mode  
 * [#4273](https://github.com/apache/incubator-nuttx/pull/#42734273) tcp: some fixes in snd_wnd processing  
 * [#4293](https://github.com/apache/incubator-nuttx/pull/#42934293) tcp: make our sequence number a bit more monotonic  
 * [#4257](https://github.com/apache/incubator-nuttx/pull/4257) Fix a few deadlock in tcp/iob  
         * [#4480](https://github.com/apache/incubator-nuttx/pull/4480) net: utils: Remove critical section for SMP in net_lock.c  
 * [#3919](https://github.com/apache/incubator-nuttx/pull/3919) tcp iob throttling related fixes  
 
# Security Issues Fixed In This Release

# Compatibility Concerns

## Changes to Kconfig

The names of some Kconfig settings have been changed to improve the naming consistency. Here is the list:

| Old                | New                 |
|:------------------:| -----------------:  |
|LIB_BOARDCTL        |BOARDCTL             |
|LIB_CRC64_FAST      |LIBC_CRC64_FAST      |
|LIB_ENVPATH         |LIBC_ENVPATH         |
|LIB_HEX2BIN         |LIBC_HEX2BIN         |
|LIB_HOMEDIR         |LIBC_HOMEDIR         |
|LIB_HOSTNAME        |LIBC_HOSTNAME        |
|LIB_KBDCODEC        |LIBC_KBDCODEC        |
|LIB_RAND_ORDER      |LIBC_RAND_ORDER      |
|LIB_SLCDCODEC       |LIBC_SLCDCODEC       |
|LIB_USRWORK         |LIBC_USRWORK         |
|LIB_USRWORKPRIORITY |LIBC_USRWORKPRIORITY |
|LIB_USRWORKSTACKSIZE|LIBC_USRWORKSTACKSIZE|
|LIB_ZONEINFO        |LIBC_ZONEINFO        |
|LIB_ZONEINFO_ROMFS  |LIBC_ZONEINFO_ROMFS  |

When they appear in code, these identifiers begin with a `CONFIG_*` prefix (e.g., `CONFIG_LIB_BOARDCTL` is renamed to `CONFIG_BOARDCTL`).

All in-tree boards have been updated, but users who maintain their own out-of-tree boards will have to update all instances of these identifiers.

See PR-4266 https://github.com/apache/incubator-nuttx/pull/4266 and PR-4267 https://github.com/apache/incubator-nuttx/pull/4267 in the main NuttX repository.

See also PR-820 https://github.com/apache/incubator-nuttx-apps/pull/820 and PR-821 https://github.com/apache/incubator-nuttx-apps/pull/821 in the NuttX apps repository.

## Changes to MTD subsystem

MTDIOC_XIPBASE, MTDIOC_FLUSH and MTDIOC_PARTINFO is removed and replace with BIOC_XIPBASE, BIOC_FLUSH and BIOC_PARTINFO:

* Simplify the general driver(e.g. partition, flt) implementation
* Reduce the confusion with the same IOCTL in the different layer

See PR-4325 https://github.com/apache/incubator-nuttx/pull/4325

## Changes to Build System

### LD Now Called Through GCC

When building NuttX with GCC toolchains, the linker is now called through $(CROSSDEV)gcc rather than $(CROSSDEV)ld. This requires all linker options to be prefixed with `-Wl,` (dash, capital W, lower-case L, comma). All boards in the NuttX tree have been updated, but any custom out-of-tree boards will need to apply this change in the relevant parts of their build scripts.

The reason for this change is that GNU Binutils 2.36.x has added new error checking on command line arguments. This has had the effect that the NuttX build suddenly broke on host OS distributions that updated to the 2.36.x release line. Reports included Arch, Manjaro, and Ubuntu. Other host OSes are likely to be affected as well.

#### Symptoms

Your toolchain and board are affected if you see errors from LD like:

```
arm-none-eabi-ld: Error: unable to disambiguate: -nostartfiles (did you mean --nostartfiles ?)
```

or (following this change in NuttX) errors from GCC like:

```
arm-none-eabi-gcc: error: unrecognized command line option '--gc-sections'; did you mean '--data-sections'?
```

#### What to change

The most common change expected to affect most boards:

Change:

```
NXFLATLDFLAGS1 = -r -d -warn-common
NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
```

to:

```
NXFLATLDFLAGS1 = -r -Wl,-d -Wl,-warn-common
NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -Wl,-no-check-sections
```

If doing a kernel build, you may need changes in your board's `kernel/Makefile` like:

Change:

```
USER_LDFLAGS = --undefined=$(ENTRYPT) --entry=$(ENTRYPT) $(USER_LDSCRIPT)
```

to:

```
USER_LDFLAGS = -Wl,--undefined=$(ENTRYPT) -Wl,--entry=$(ENTRYPT) $(USER_LDSCRIPT) -nostartfiles -nodefaultlibs
```

Change:
 
```
$(Q) $(LD) -o $@ $(USER_LDFLAGS) $(USER_LIBPATHS) $(OBJS) --start-group $(USER_LDLIBS) --end-group $(USER_LIBGCC)
```

to:

```
$(Q) $(LD) -o $@ $(USER_LDFLAGS) $(USER_LIBPATHS) $(OBJS) -Wl,--start-group $(USER_LDLIBS) -Wl,--end-group $(USER_LIBGCC)
```

Depending on your board's customized build scripts, you may need to look out for other `make` variables in your board's `Makefile` or `Make.defs`.

Some variables to look for:

- `ARCHSCRIPT`
- `ARCH_LIBS`
- `CCLINKFLAGS`
- `EXTRALINKCMDS`
- `LDELFFLAGS`
- `LDENDGROUP`
- `LDFLAGS`
- `LDLINKFLAGS`
- `LDMODULEFLAGS`
- `LDSTARTGROUP`
- `NXFLATLDFLAGS1`
- `NXFLATLDFLAGS2`
- `USER_LDFLAGS`

Anything that executes LD, such as:

```
$(Q) $(LD) --entry=__start $(LDFLAGS) $(LIBPATHS) $(EXTRA_LIBPATHS) \
```

Anything that processes LD flags, such as:

```
$(LIBPATHS) "-(" $(LDLIBS) "-)" $(LDFLAGS) -Map="$(TOPDIR)$(DELIM)nuttx.map"
```

In general, any command line options destined for LD must be prefixed with `-Wl,` (dash, capital W, lower-case L, comma) since they are now being passed through GCC.

#### Examples

Change:

```
EXTRALINKCMDS += @$(TOPDIR)/syscall/syscall_wraps.ldcmd
```

to:

```
EXTRALINKCMDS += -Wl,@$(TOPDIR)/syscall/syscall_wraps.ldcmd
```

Change:

```
LDFLAGS += -gc-sections
```

to:

```
LDFLAGS += -Wl,-gc-sections
```

Change:

```
$(LIBPATHS) "-(" $(LDLIBS) "-)" $(LDFLAGS) -Map="$(TOPDIR)$(DELIM)nuttx.map"
```

to:

```
$(LIBPATHS) "-(" $(LDLIBS) "-)" $(LDFLAGS) -Wl,-Map="$(TOPDIR)$(DELIM)nuttx.map"
```

Change:

```
NXFLATLDFLAGS1 = -r -d -warn-common
```

to:

```
NXFLATLDFLAGS1 = -r -Wl,-d -Wl,-warn-common
```

Change:

```
ifeq ($(CONFIG_CYGWIN_WINTOOL),y)
  LDFLAGS += -Map="${shell cygpath -w $(TOPDIR)/nuttx.map}" --cref
else
  LDFLAGS += -Map=$(TOPDIR)/nuttx.map --cref
endif
```

to:

```
ifeq ($(CONFIG_CYGWIN_WINTOOL),y)
  LDFLAGS += -Wl,-Map="${shell cygpath -w $(TOPDIR)/nuttx.map}" -Wl,--cref
else
  LDFLAGS += -Wl,-Map=$(TOPDIR)/nuttx.map -Wl,--cref
endif
```

Also, if you have assigned the LD variable, it would need to change as well:

Change:

```
LD = $(CROSSDEV)ld
```

to:

```
LD = $(CROSSDEV)gcc
```

#### References

* Git commit # 45672c269db13f59bdaa417e564837e8bbb6c8c1 in the NuttX main repository:
  - https://github.com/apache/incubator-nuttx/commit/45672c269db13f59bdaa417e564837e8bbb6c8c1
* PR-3836 in the NuttX main repository:
  - https://github.com/apache/incubator-nuttx/pull/3836
* Issues 3209 and 3826 in the NuttX issue tracker:
  - https://github.com/apache/incubator-nuttx/issues/3209
  - https://github.com/apache/incubator-nuttx/issues/3826
* Description of the change on Binutils mailing list:
  - https://sourceware.org/pipermail/binutils/2021-June/116826.html
* Description of -Wl,option in the GCC manual:
  - https://gcc.gnu.org/onlinedocs/gcc/Link-Options.html