NuttX-7.19 ---------- The 119th release of NuttX, Version 7.19, was made on December 26, 2016, and is available for download from the Bitbucket.org website. Note that release consists of two tarballs: nuttx-7.19.tar.gz and apps-7.19.tar.gz. These are available from: https://bitbucket.org/nuttx/nuttx/downloads https://bitbucket.org/nuttx/apps/downloads Both may be needed (see the top-level nuttx/README.txt file for build information). Additional new features and extended functionality: * Core OS: - sched/semaphore, sched/phread/, libc/semaphore, libc/pthread: Add pthread_mutexattr_get/set_protocol and non-standard sem_get/set_protocol. These may use to enable or disable priority inheritance on a single semaphore. - Spinlocks: Added capability to provide architecture-specific memory barriers. - SMP: Add spin_trylock(). Use this in conditions where other CPUs need to stopped but we cannot call enter_critical_section(). - sched note: Extend OS instrumentation to include some SMP events. Also add spinlock instrumentation; In SMP configurations, add a filter mask to log only notes from certain CPUs. - sched note: Permit spinlock and critical section notes in in-memory buffer iff sched_not_get() interfaces is disabled. - sched note: Add additional note to see if/when CPU is started in SMP mode. - sched note: Record ID enumeration now results on constant values; ID values do not change with configuration. This makes writing post-processing software much easier. - boardctl: Add new boardctl() command, BOARDIOC_NX_START, to start the NX server as a kernel thread. - pthreads: Add pthread_cleanup_push() and pthread_cleanup_pop(). - pthreads: Added pthread_setcanceltype() and pthread_testcancel(). - pthreads: Add support for cancellation points. - task_delete() now obeys all cancellation point semantics. - Add task_setcancelstate(), task_setcanceltype(), and task_testcancel(). These are non-standard interfaces analogous to the corresponding pthread_ interfaces that provide cancellation controls for tasks. * Graphics/Display Drivers: - boardctl: Add new boardctl() command, BOARDIOC_NX_START, to start the NX server as a kernel thread. * Networking/Network Drivers: - Network drivers: Add option to use low-priority work queue to all Ethernet and MAC level drivers. - Network Drivers: Adapt all Ethernet (and other MAC) drivers to work as though CONFIG_NET_MULTIBUFFER were set. Remove all references to CONFIG_NET_MULTIBUFFER. - Eliminate CONFIG_NO_NOINTS. There is no longer any support for interrupt level processing of the network stack. Lots of files changed. * Other Common Device Drivers: - Vishay VEML6070: Add Vishay VEML6070 driver. From Alan Carvalho de Assis. * ARMv7-A - ARMv7-A/i.MX6: Add SCU register definitions. Add some controls to enable SMP cache coherency in SMP mode. Makes no difference, however -- cache still incoherent on i.MX6. - ARMv7 GIC: SGIs are non-maskable but go through the same path as other, maskable interrupts. Added logic to serialize SGI processing when necessary. * Atmel SAM3/4: - SAM3/4: Add SMP support for the dual-core SAM4CM. From Masayuki Ishikawa. * Atmel SAM3/4 Drivers: - Add support for the SAM5CMP-DB board. From Masayuki Ishikawa. * Atmel SAM3/4 Boards: - SAM4CMP-DB: Add support for the Atmel SAM4CMP-DB board running in an SMP configuration. From Masayuki Ishikawa. - SAM4CMP-DB: Add hooks to auto-mount the procfs file system on startup in board bring-up logic. * Atmel SAMV7 Drivers: - SAMv7: Register the watchdog device at the configured device path CONFIG_WATCHDOG_DEVPATH vs. hard-coded /dev/wdt. From Frank Benkert. * Calypso - Calyps: Remove all Calypso board configurations. Remove Calypso architecture support and support for Calypso SERCOMM driver. * Misoc LM32: - Misoc LM32: Adds basic support for the Misoc procoessors and the LM32 in particular. From Ramtin Amin. - Misoc LM32: Add signal handling logic. From Ramtin Amin. - Misoc LM32: Add logic to flush/invalidate caches. From Ramtin Amin. * Misoc LM32 Drivers: - Misoc LM32 Serial: Add interrupting Misoc serial driver. From Ramtin Amin. - Misoc LM32 Timer: Add timer driver. From Ramtin Amin. - Misoc LM32: Add Misoc Ethernet driver From Ramtin Amin. * Misoc LM32 Boards: - Misoc LM32 Qemu: Board support for testing Misoc LM32 with Qemu. From Ramtin Amin. - Misoc LM32 Qemu: Integrate network support into configs/misoc/hello. From Ramtin Amin. - Misoc LM32 Qemu: Remove configs/misoc/include/generated directory. I suppose the intent now is that this is a symbolic link? DANGER! This means that you cannot compile this code with first generating these files a providing a symbolic link to this location! There is a sample directory containing generated sources. This is really only useful for performing test builds. You really must generate the Misoc architecture for a real-life build. From Ramtin Amin. * NXP Freescale i.MX6 Drivers: - i.MX6: Add an untested SPI driver taken directly from the i.MX1 port. * NXP Freescale Kinetis: - Kinetis: Added missing headers. Kinetis broke out SPI to kinetis/kinetis_spi.h. Broke out DMA to use the modern NuttX chip inclusion - still STUBS. Add Kinetis support for ARMV7-M Common Vector and FPU. Allow CONFIG_ARMV7M_CMNVECTOR, CONFIG_STACK_COLORATION, CONFIG_ARCH_FPU. Fix i2c driver offset swapped for value in kinetis_i2c_putreg. From David Sidrane. * NXP Freescale Kinetis Drivers: - Kinetis: Add UID Unique ID. From Neil Hancock. * NXP Freescale Kinetis Boards: - Freedom-K64F board: Add support for UID Unique ID. From Neil Hancock. * NXP Freescale LPC17xx Boards: - Olimex-LPC1766-STK: Enable procfs in NSH configuration. Automount /proc on startup. * NXP Freescale LPC43xx Drivers: - LPC43xx: Add timer driver: From Alan Carvalho de Assis. - LPC43xx GPDMA driver: The GPDMA block is basically the same as the LPC17xx. Only the clock configuration is different and LPC43xx has four different DMA request sources, where LPC17xx has only two. From Alan Carvalho de Assis. * NXP Freescale LPC43xx Boards: - Bambino 200E: Add basic support to Micromint Bambino 200E board. This includes contributions from Jim Wolfman. From Alan Carvalho de Assis. - Bambino 200E: Add support for timer driver. From Alan Carvalho de Assis. * RGMP: - Remove RGMP and RGMP drivers. * RISC-V: - RISC-V: Add support for the RISC-V architecture and configs/nr5m100-nexys4 board. The board support on this is pretty thin, but it seems like maybe a good idea to get the base RISC-V stuff in since there are people interested in it. From Ken Pettit. * STMicro STM32 Drivers: - STM32 F3: Implementation of the STM32 F37xx SDADC module. There are also changes to ADC, DAC modules. SDADC has only been tested in DMA mode and does not support external TIMER triggers. This is a work in progress. From Marc Rechté. - STM32 F3: Add PWM driver support for STMF37xx. The changes have been tested successfully for TIM4 and TIM17 (different IPs). From Marc Rechté. - STM32 F4: Support oversampling by 8 for the STM32 F4. From David Sidrane. - STM32 F4: Added Timers 2-5 and control of SAI and I2S PLLs. Added support for stmf469 SAI and I2S PLL configuration and STM446 fixes. From David Sidrane. - STM32 F4: Expanded OTGFS support to stm32F469 and stm32f446. Added missing bit definitions, Used stm32F469 and stm32f446 bit definitions, Removed unused header file. From David Sidrane. - STM32 F4: Allow dma in 1 bit mode in STM32F4xxx. From David Sidrane. - STM32 F7: Allow the config to override the clock edge setting. From David Sidrane. - STM32 L4: Support Complementary PWM outputs on STM32L4. From Sebastien Lorquet. - STM32 L4: Add implementation of dumpgpio for stm32l4, was required for pwm debug. From Sebastien Lorquet. * STMicro STM32 Boards: - STM32F103 Minimum: Add button support. From Alan Carvalho de Assis. - STM32F103 Minimum: Add support to PWM on STM32F103-Minimum board. From Alan Carvalho de Assis. - STM32F103 Minimum: Add RGB LED support on STM32F103 Minimum board. From Alan Carvalho de Assis. - STM32F103 Minimum: Add Vishay VEML6070 driver support to the STM32F103-Minimum board. From Alan Carvalho de Assis. - Nucleo-F303RE: Add STM32 F303RE hello configuration. From Marc Rechté. - Nucleo-L476: Support PWM testing on board Nucleo L476. From Sebastien Lorquet. - Nucleo L476: Add support for timers to Nucleo L476. From Sebastien Lorquet. - Hymini STM32v: Enable CONFIG_RTC in the hymini-stm32v/nsh2 (kitchensink) config. From Maciej Wójcik. - Olimex STM32-p407: Add support for the Olimex STM32 P407 board. * TI Tiva Drivers: - Tiva PWM: Support PWM_PULSECOUNT feature for TI tiva. From Young.Mu. * Xtensa/ESP32 - Xtensa ESP32: Basic architectural support for Xtensa processors and the Espressif. ESP32 added. - Xtensa ESP32: Add EXPERIMENTAL hooks to support lazy Xtensa co-processor state restore in the future. - Xtensa ESP32: Basic port is function in both single CPU and dual CPU SMP configurations. There is an NSH configuration for each CPU configuration. Outstanding issues include missing clock configuration logic, missing partition tables to support correct configuration from FLASH, and some serial driver pin configuration issues. - Xtensa ESP32: Add stack checking logic. * Xtensa/ESP32 Boards: - ESP32 Core v2: Basic support for Espressif ESP32 Core v2 board added. The initial release includes an NSH and an SMP test configuration. - ESP32 Core v2: Add configuration to support linking NuttX for execution out of IRAM. - ESP32 Core v2: Automatically mount /proc at start-up. - ESP32 Core v2: Add an OS test to verify the port. * C Library/Header Files: - libc/locale: Add a dummy setlocale() function to avoid drawing the function from newlib. Add clocale header file. - include/locale.h: Modify locale.h to add localeconv() and lconv structure. From Alan Carvalho de Assis. - libc/locale: Allows c++ code to compile with or without CONFIG_LIBC_LOCALE and will generate a link error if CONFIG_LIBC_LOCALE is not defined and setlocale is referenced. With CONFIG_LIBC_LOCALE defined setlocale will act as if MB string is not supported and return "C" for POSIX. C and "". From David Sidrane. - libc/wchar: Add wcslen, wmemchr, wmemcmp, wmemcpy wmemset, btowc, mbrtowc, mbtowc, wcscmp, wcscoll, and wmemmove to NuttX. From Alan Carvalho de Assis. - libc/wctype: Add functions wcrtomb, wcslcpy, wcsxfrm, wctob, wctomb, wctype, localeconv, strcoll, strxfrm, swctype, towlower, towupper and wcsftime. Add wctype.h; Move lib_wctype.c to libc/wctype. From Alan Carvalho de Assis. - include/ctype.h : Add isblank() macro to ctype.h. From Alan Carvalho de Assis. - lic/stdlib: Add strtof() and strtold() as simply a copy of strtod with types and limits changed. - sscanf(): Use strtof() instead of strtod() if a short floating point value was requested. The should help performance with MCUs with 32-bit FPU support with some additional code size. - sscanf(): Add scansets to the scanf function. Enabled CONFIG_LIBC_SCANSET option. From Aleksandr Vyhovanec. - include/inttypes.h: Add architecture-specific inttypes.h. From Paul A. Patience. - C Library: Allow option to enable IP address conversions even when the IP address family is not supported. * Build/Configuration System: - The Smoothie project needs to compile C++ inside config/boardname/src/ to use with High Priority Interruption, then I modified the board configs Makefile to support it. It works fine for the first time compilation, but if we execute "touch config/boardname/src/Pin.cxx" and execute "make" it will not detect that Pin.cxx was modified. I think there is some other place I should modify, but I didn't find it. From Alan Carvalho de Assis. * Tools: - tools/: Add tools/showsize.sh. * NSH: apps/nshlib: - NSH: dd command will show statistics. From Masayuki Ishikawa. * Applications: apps/system: - apps/system/sched_note: Extend to include additions to instumentation for SMP. - apps/system/sched_note: Add support for spinlock notes. - apps/system/sched_note: Add support for new scheduler instrumentation. * Platforms: apps/platform: - ESP32 Core v2: Add platform support for the ESP32 core v2 board. - Olimex STM32-p407: Add platform support for the Olimex STM32 P407. * Graphics: apps/graphics - graphics/traveler/tcledit and libwld: Add an X11 Tcl/Tk tool that can be used to edit Traveler world files. - Graphics: Remove all NX server taks. Instead, call boardctl() to the NX server kernel thread. * Applications: apps/examples: - examples/buttons: Add a new buttons example that uses the button character driver instead of the architecture buttons directly. From Alan Carvalho de Assis. - examples/cctype: Add an example to verify cctype functions. - Remove RGMP example. - examples/ostest: Extend the pthread cancellation test to exercise pthread_cleanup_push() (and pthread_cleanup_pop() indirectly via pthread_cancel() and pthread_exit(). - examples/ostest: enhance pthread cancellation test some. Works-In-Progress: * IEEE802.14.5/6LowPAN. Hooks and framework for this effort were introduced in NuttX-7.15. Work has continued on this effort on forks from the main repositories, albeit with many interruptions. The completion of this wireless feature will postponed until at least NuttX-7.20. Bugfixes. Only the most critical bugfixes are listed here (see the ChangeLog for the complete list of bugfixes and for additional, more detailed bugfix information): * Core OS: - sched/semaphore: Within the OS, when a thread obtains a semaphore count it must call sem_addholder() if CONFIG_PRIORITY_INHERITANCE is enabled. If a count is available, then sem_wait() calls sem_addholder(), otherwise it waited for the semaphore and called sem_addholder() when it eventually received the count. This caused a problem when the thread calling sem_wait() was very low priority. When it received the count, there may be higher priority threads "hogging" the CPU that prevent the lower priority task from running and, as a result, the sem_addholder() may be delayed indefinitely. The fix was to have sem_post() call sem_addholder() just before restarting the thread waiting for the semaphore count. This problem was noted by Benix Vincent who also suggested the solution. - Many files: Make sure that priority inheritance is not enabled for semaphores whose primary use is signaling (vs locking of resources) by calling sem_setprotocol(). - sched/semaphore: sem_trywait() no longer modifies the errno value UNLESS an error occurs. This allows these functions to be used internally without clobbering the errno value. From Freddie Chopin. - sched/clock: Correct clock initialization. The correct range for the month is 0-11 but is entered as 1-12 in the .config file. Add ranges to START_YEAR, MONTH, and DAY in sched/Kconfig. - sched/clock: Correct calculation for the case of Tickless mode with a 32-bit timer. In that case, the calculation was returning millisecond accuracy. That is not good when the timer accuracy is < 1 msec. From Rajan Gill. - Work Queue: When queuing new LP work, don't signal any threads if they are all busy. From Heesub Shin. - Work Queue: Signal sent from work_signal() may interrupt the low priority worker thread that is already running. For example, the worker thread that is waiting for a semaphore could be woken up by the signal and break any synchronization assumption as a result. It also does not make any sense to send signal if it is already running and busy. This change fixes it. From Heesub Shin. - Fix DEBUGASSERT() in group_signal.c. From Masayuki Ishikawa. - Eliminate bad boardctl() commands: Remove all references to BOARDIOC_PWMSETUP and board_pwm_setup(). Remove all references to BOARDIOC_ADCSETUP and board_adc_setup(). Remove BOARDIOC_CAN_INITIALIZE. CAN initialization is now done in the board initialization logic just like every other device driver. - pthreads: Fix an error in pthread_mutex_destroy(). An error could occur while destroying a mutex after a pthread has been canceled while holding the mutex. - task_restart: Make sure new task starts with pre-emption disabled and not in a critical section. - Enter/leave Critical Sections. Major redeign to enter/leave_critical_section logic to deal with the case where interrupts are disabled only on the local CPU. In this case, some rather complex spinlocks must be used to maintain the critical section across all CPUs. - SMP Critical Sections: Fixes for the SMP case: (1) Change order for SMP case in enter_critical_section: (1) Disable local interrupts BEFORE taking spinlock and (2) If SMP is enabled, if any interrupt handler calls enter_critical_section(), it should take the spinlock. - SMP wdogs: Wdog timers use a tasking interface that to manipulate wdogs, and a different interface in the timer interrupt handling logic to manage wdog expirations. In the single CPU case, this is fine. Since the tasking level code calls enter_critical_section, interrupts are disabled and no conflicts can occur. But that may not be the case in the SMP case. Most architectures do not permit disabling interrupts on other CPUs so enter_critical_section must work differently: Locks are required to protect code. this change adds locking (via enter_critical section) to wdog expiration logic for the the case if the SMP configuration. - SMP vfork(): Fix a race condition in the SMP case. Existing logic depended on the fact that the child would not run until waitpid was called because the child had the same priority as the parent. BUT in the SMP case that is not true... the child may run immediately on a different CPU. - SMP: This change adds a new internal interfaces and fixes a problem with three APIs in the SMP configuration. The new internal interface is sched_cpu_pause(tcb). This function will pause a CPU if the task associated with 'tcb' is running on that CPU. This allows a different CPU to modify that OS data structures associated with the CPU. When the other CPU is resumed, those modifications can safely take place. The three fixes are to handle cases in the SMP configuration where one CPU does need to make modifications to TCB and data structures on a task that could be running running on another CPU. Those three cases are task_delete(), task_restart(), and execution of signal handlers. In all three cases the solutions is basically the same: (1) Call sched_cpu_pause(tcb) to pause the CPU on which the task is running, (2) perform the necessary operations, then (3) call up_cpu_resume() to restart the paused CPU. - SMP: Add logic to avoid a deadlock condition when CPU1 is hung waiting for g_cpu_irqlock with interrupts interrupts and CPU0 is waiting for g_cpu_paused. - SMP: Enforce this rule: Tasks which are normally restored when sched_unlock() is called must remain pending (1) if we are in a critical section, i.e., g_cpu_irqlock is locked , or (2) other CPUs still have pre-emption disabled, i.e., g_cpu_schedlock is locked. In those cases, the release of the pending tasks must be deferred until those conditions are met. * File System/Block Drivers/MTD Drivers: - AT24XX EEPROM MTD driver: Added EEPROM timeout. Fromo Aleksandr Vyhovanec. - fs/procfs: Fix procfs status for SMP case. * Graphics/Graphic Drivers: - Fonts: Correct some default font IDs. From Pierre-Noel Bouteville. * Common Drivers: - usbhost/enumerate: Fix possible buffer overwrite. From Janne Rosberg. - usbhost/composite: Fix compile; missing semicolons. From Jann Rosberg. - syslog: Fixes required for file syslog output. From Max Kriegleder. - SPI configuration: Fix Kconfig warning. This change moves the ARCH_HAVE_SPI options outside the check for SPI. Those options don't depend on SPI, and Kconfig files in arch/ enable them even if SPI isn't enabled. Source the driver's Kconfig in drivers/Kconfig only if support for the driver is enabled prevents us from defining these ARCH_HAVE options in the driver's Kconfig. We should probably remove the other checks in drivers/Kconfig and check if the drivers are enabled only in their Kconfig. From Paul A. Patience. - drivers/timer: Remove the timer driver TIOC_SETHANDLER IOCTL call. This calls directly from the timer driver into application code. That is non-standard, non-portable, and cannot be supported. Instead, add timer driver hooks to support signal notification of timer expiration. Signal notification logic added by Sebastien Lorquet. - All timer lower half drivers. Port Sebastien's changes to all other implementations of the timer lower half. - USB MSC Device: Fix length of mode6 sense reply packet. From Wolfgang Reißnegger. - USB Composite Host: Fix end offset in usbhost_copyinterface(). From Janne Rosberg. - USB CDC/ACM Host: Add CDC_SUBCLASS_ACM and CDC_PROTO_ATM to supported class and proto. From Janne Rosberg. - SSD1306: Fix errors in SPI mode configuration. From Gong Darcy. - CDC/ACM Device Class: uart_ops_s portion of cdcacm will not be initialized with correct functions if CONFIG_SERIAL_DMA is selected. * Networking/Network Drivers: - drivers/net/tun.c: Fix bug in TUN interface driver. From Max Nekludov. * ARMv7-A: - ARMv7-A SMP: Add SMP logic to signal handling. * ARMv7-M: - ARMv7-M: Fix double allocation of MPU region in mmu.h. * ARMv7-R: - ARMv7-R: Fix compilation error. This change fixes compilation errors on MPU support for ARMv7-R. From Heesub Shin. - ARMv7-R: fix invalid drbar handling. In ARMv7-R, [31:5] bits of DRBAR is physical base address and other bits are reserved and SBZ. Thus, there is no point in passing other than the base address. From Heesub Shin. - ARMv7-R: Remove the redundant update on SCTLR. mpu_control() is invoking cp15_wrsctlr() around SCTLR update redundantly. From Heesub Shin. - ARMv7-R: Add new Kconfig entries for D/I-cache. Unlike in ARMv7-A/M, Kconfig entries for data and instruction caches are currently missing in ARMv7-R. This change adds those missing Kconfig entries. Actual implementation for those functions will be added in the subsequent patches. From Heesub Shin. - ARMv7-R: Add cache handling functions. This change adds functions for enabling and disabling d/i-caches which were missing for ARMv7-R. From Heesub Shin. - ARMv7-R: Fix typo in mpu support. s/ARMV7M/ARMV7R/g. From Heesub Shin. - ARMv7-R: Fix CPSR corruption after exception handling. A sporadic hang with consequent crash was observed when booting. It seemed to be caused by the corrupted or wrong CPSR restored on return from exception. NuttX restores the context using code like this: msr spsr, r1. GCC translates this to: msr spsr_fc, r1. As a result, not all SPSR fields are updated on exception return. This should be: msr spsr_fsxc, r1. On some evaluation boards, spsr_svc may have totally invalid value at power-on-reset. As it is not initialized at boot, the code above may result in the corruption of cpsr and thus unexpected behavior. From Heesub Shin. - ARMv7-R: Fix to restore the Thumb flag in CPSR. Thumb flag in CPSR is not restored back when the context switch occurs while executing thumb instruction. From Heesub Shin. * Atmel SAM3/4 Drivers: - SAM3/4 UDP: Add delay between setting and clearing the endpoint RESET bit in sam_ep_resume(). We need to add a delay between setting and clearing the endpoint reset bit in SAM_UDP_RSTEP. Without the delay the USB controller will (may?) not reset the endpoint. If the endpoint is not being reset, the Data Toggle (DTGLE) bit will not to be cleared which will cause the next transaction to fail if DTGLE is 1. If that happens the host will time-out and reset the bus. Adding this delay may also fix the USBMSC_STALL_RACEWAR in usbmsc_scsi.c, however this has not been verified yet. From Wolfgang Reißnegger. - SAM3/4: Remove unused 'halted' flag from UDP driver. From Wolfgang Reißnegger. - SAM3/4: Remove 'stalled' flag from the UDP driver. This flag is not necessary because the state of the endpoint can be determined using 'epstate' instead. From Wolfgang Reißnegger. * Atmel SAM3/4 Boards: - SAM4S Xplained Pro: Configuration uses old, improper timer interface. CONFIG_TIMER disabled in configuration. Remove obsolete timer initialization logic. * Atmel SAMV7 Drivers: - SAMv7 USBDEVHS: A problem occurred with the SAMV7 USBDEVHS driver if the USB cable is unplugged while a large amount of data is send over an IN endpoint using DMA. If the USB cable is plugged in again after a few seconds it is not possible to send data over this IN endpoint again, all other endpoints work as expected. The problem occurs because if the USB cable is unplugged while an DMA transfer is in flight the transfer is canceled but the register SAM_USBHS_DEVDMACTRL is left in an undefined state. The problem was fixed the problem by resetting the register SAM_USBHS_DEVDMACTRL to a known state. Additionally all pending interrupts are cleared. From Stefan Kolb. - SAMV7 MCAN: Prevent Interrupt-Flooding of ACKE when not connected to CAN-BUS. An Acknowledge-Error will occur every time no other CAN Node acknowledges the message sent. This will also occur if the device is not connected to the can-bus. The CAN-Standard declares, that the Chip has to retry a given message as long as it is not sent successfully (or it is not cancelled by the application). Every time the chip tries to resend the message an Acknowledge-Error-Interrupt is generated. At high baud rates this can lead in extremely high CPU load just for handling the interrupts (and possibly the error handling in the application). To prevent this Interrupt-Flooding we disable the ACKE once it is seen as long we didn't transfer at least one message successfully. From Frank Benkert. - SAMV7 MCAN: Make delete_filter functions more robust. From Frank Benkert. * Atmel SAMA5 Drivers: - SAMA5 PWM: Driver does not build when executing from SDRAM before board frequencies are not constant. Rather, the bootloader configures the clocking and we must derive the clocking from the MCK left by the bootloader. This means lots more computations. This is untested on initial change because I don't have a good PWM test setup right now. * Misoc LM32: - Misoc LM32: Corrects a bug that never occurred in qemu on simulation or real fpga. The error was that the r1 register was being modified out of context switching and not restoring it. From Ramtin Amin * NXP Freescale i.MX6: - i.MX6 interrupt handling: Additional logic needed to handle nested interrupts when an interrupt stack is used. Nesting can occur because SGI interrupts are non-maskable. * NXP Freescale LPC43xx Drivers: - LPC43xx serial: Fix a typo in ioctl TIOCSRS485 ioctl. From Vytautas Lukenskas. - LPC43xx serial: Restore RS485 mode on serial port open (if RS485 is enabled via menuconfig). From Vytautas Lukenskas. - LPC43xx SD/MMC: Correct some definitions on SMMC control register in lpc43_sdmmc.h. From Alan Carvalho de Assis. - LPC43xx SD card: Correct pin configuration options needed for SD card pins. From Alan Carvalho de Assis. * SiLabs EFM32: - EFM32: Fix a compilation error. From Pierre-noel Bouteville. * STMicro STM32 Drivers: - STM32 CHxN channels are always outputs. From Sebastien Lorquet. - STM32 DAC: Fix shift value whenever there are is a DAC2 and, hence, up to three interfaces. From Marc Rechté. - STM32 F1: Add TIM8 to STM32F103V pinmap. From Maciej Wójcik. - STM32 F1: Fix for F1 RTC Clock, tested on F103. From Maciej Wójcik. - STM32 F3: STM32F303xB and STM32F303xC chips have 4 ADCs. From Paul A. Patience. - STM32 F4: A new implementation of the STM32 F4 I2C bottom half. The common I2C as this did not handled correctly in the current implementation (see also https://github.com/PX4/NuttX/issues/54). The changes almost exclusively affect the ISR. From Max Kriegleder. - STM32 F4 OTGHS Host: If STM32F446 increase number of channels to 16. From Janne Rosberg. - STM32 F4: I think, that Size is (highest address+1 - Base address). Base address has been removed and if address+count >= size we are outside of the Flash. From David Sidrane. - STM32 F4: Fix ADC compilation error when DMA isn't enabled. From Paul A. Patience. - STM32 F4: STM32F427 was rebooting. Over reached family. From David Sidrane. - STM32 F4: Added STM32F469 RAM size and deliberated STM32F446 size. From David Sidrane. - STM32 F4: Typo in stm32f76xxxx_pinmap.h edited online with Bitbucket. From David Sidrane. - STM32 F7: stm32_i2c.c Dejavu. Fixes a bug previously found in the F4. From David Sidrane. - STM32 F7: OTGDEV fixed typo. From David Sidrane. - STM32 F7: Fix to SPI-Master driver. Without this the chip select decoding feature will not work properly. From Michael Spahlinger. - STM32 F7: STM32F7 SD/MMC driver depends on CONFIG_SDIO_DMA which is only defined in stm32/Kconfig. Changed to CONFIG_STM32F7_SDMMC_DMA and defined in stm32f7/Kconfig. - STM32 F7: Fix some STM32F7 copy paste errors. From David Sidrane. - STM32 L4: Complementary PWM outputs on STM32L4" (1) too many parentheses when calculating max chan count and (2) channel 4 does not have a complementary output. From Sebastien Lorquet. - STM32 L4: Fix I2C devices RCC registers. From Sebastien Lorquet. - STM32 L4: Enable and renaming for 32l4 UARTs 4 and 5. From Sebastien Lorquet. - STM32 L4: Change the way to configure quadrature encoder prescalers. From Sebastien Lorquet. - STM32 L4: Correct USART1/2 definitions. Use default mbed UART4 settings. From Sebastien Lorquet. * STMicro STM32 Boards: - STM32F103 Minimum: Fix Timers 2 to 7 clock frequencies. From Alan Carvalho de Assis. - Nucleo-F303RE: Remove duplicate setting from board.h. From Marc Rechté. - Nucleo F303RE: Various fixes to get the ADC configuration building again after PR. Refresh all configurations. - Nucleo L476RG: Add better selection of timer. * TI Tiva Boards: - DK-TM4C129x: Typo fix. From Wolfgang Reißnegger. * Xtensa ESP32: - ESP32 core v2: Flush the UART TX buffer in the esp32 serial shutdown routine. The ROM bootloader does not flush the FIFO before handing over to user code, so some of this output is not currently seen when the UART is reconfigured in early stages of startup. From Angus Gratton. - Xtensa ESP32: Corrects a problem with dispatching to signal handlers: Cannot vector directly to the signal handling function as in other ABIs under the Xtensa Window ABI. In that case, we need to go through a tiny hook when performs the correct window call (call4) otherwise registers will be scrambled in the signal handler. * Xtensa ESP32 Boards: - ESP32 core v2: Changes the openocd config file's default flash voltage from 1.8V to 3.3V. This is not necessary right now, but may save some hard-to-debug moments down the track (3.3V-only flash running at 1.8V often half-works and does weird things...). From Angus Gratton. * C Library/Header Files: - libc/stdio: Fixes sscanf() %sn where strlen(data) < n. From David Sidrane. - libc/stdio: Include wchar.h in lib_libvsprintf.c to fix compilation error. From Alan Carvalho de Assis. - include/sys/time.h: timersub macro modified per recommendations of phreakuencies. - include/ctype.h and cxx/cctype: Implement ctype.h functions as inline if possible. cctype can then properly select namespace. - include/: Fix a number of header files with mismatched 'extern C {' and '}'. - libc/unisted: Change brings strtol() and related functions more conformant with POSIX. Corner cases like strtol(-2147483648, NULL, 10) now pass clang -fsanitize=integer without warnings. From Juha Niskanen. - libc/unistd: sleep() was returning remaining nanoseconds (kind of), instead the remaining seconds. From Eunbong Song. - termios.h: Fix CRTSCTS define to include input and output flow. From Lorenz Meier. * Build/Configuration System: - configs/*/defconfig: The buttons example was changed to archbuttons. As a result all of the button configurations are broken and need some renaming in the defconfig files. Noted by Frank Berkert. - config/*/defconfgs: More fallout from name change of apps/examples/buttons to archbuttons. - configs: All QE encoder files. Last change made timer hard-coded to 3. Make configurable. - configs: Remove all traces of the no-longer existent ARCHBUTTONS example. Remove all button configurations that depended on the obsoleted ARCHBUTTON example. - minnsh Configurations: Remove minnsh configurations and support logic: up_getc() and lowinstream. This was an interesting exercise to see just how small you could get NuttX, but otherwise it was not useful: (1) the NSH code violated the OS interface layer by callup up_getc() and up_putc() directly, and (2) while waiting for character input, NSH would call up_getc() which would hog all of the CPU. Not a reasonable solution other than as a proof of concept. * Application Build/Configuration System: - Make.defs: Using wrong link script if native window tool used with Cygwin. * apps/platform: - ESP32 Core v2 Platform: Fix some naming that prevented building the C++ support. * apps/nshlib: - NSH Library: nsh_getdirpath(), use snprint instead of sprintf to avoid possibility of buffer overrun. Noted by Chung Hwan Kim. * apps/system: - Remove std_readline(). This called up_getc() and up_putc() directly, violating the POSIX OS interface. * apps/netutils: - FTPD: Fixed bug that didn't free ftpd resources on exit. From Pascal Speck. - NTP client: Fix missing left parenthesis. From Pierre-Noel Bouteville. - cJSON: Import patch to fix:cJSON_PrintUnformatted() behaves unexpected if an empty array shall be printed to text. from Jerome Lang 2012-04-19. From Pierre-Noel Bouteville. - esp8266 update cosmetic and many bug fix. From Pierre-Noel Bouteville. - FTPD: Fix bug un ftpd file or socket may be not closed. From Pierre-Noel Bouteville. * apps/modbus: - Modbus Master is missing many files and doesn't compile at all. More details in https://groups.yahoo.com/neo/groups/nuttx/conversations/topics/13734. From Vytautas Lukenskas. * apps/examples: - The examples/qencoder app was trying to init the encoder by a direct call into the board, cheating in a local header to declare the normally unavailable function prototype. From Sebastien Lorquet. - apps/examples/timer: Should detach signal handler before exiting. - examples/qencode: The examples/qencoder app was trying to init the encoder by a direct call into the board, cheating in a local header to declare the normally unavailable function prototype. From Sebastien Lorquet. - apps/examples/archbuttons: Removed because it violates OS interface principles. - examples/adc, pwm, can: Remove all usage of BOARDIOC_ADCTEST_SETUP, BIOARDIOC_PWMSETUP. Remove BOARDIOC_CAN_INITIALIZE. CAN initialization is now done in the board initialization logic just like every other device driver. - examples/ostest: Add some delays to the pthread cancellation test. With deferred cancellation enabled, things happen more asynchronously.