I2CTarget, improved floats and native emitter, STM32N6 & ESP32C2 support

This release of MicroPython sees the introduction of machine.I2CTarget, which allows Python code to implement an I2C target device. It's available on the alif, esp32, mimxrt, rp2, samd, stm32 and zephyr ports. In the simplest case it can create an I2C register/memory device that connects to a bytearray (or similar buffer) and allows an I2C controller to read from and write into that bytearray. For more complex scenarios the I2CTarget class exposes a set of interrupts which can be acted upon by Python code, allowing an arbitrary I2C device to be created. See the documentation for more details and examples. Floating point support has been improved in a few ways in this release. First, the formatting (printing) of floats has been rewritten to significantly improve the repr reversibility of floating-point numbers. That is, formatting and then re-parsing a float should return the original value. In MicroPython the percentage of floats that correctly repr and parse back was around 28% (single precision) and 38% (double precision), but has now been improved (in the standard build configuration) to 98.5% and 99.8% (single and double respectively). In addition to printing out more accurate floats, that helps a lot when saving floats to .mpy files, because it means they can be loaded back to the same value. Second, there is now support in the compiler for handling floats as constants. Floats can now be folded (along with integers) in arithmetic operations, and be part of const assignments. This helps to optimize bytecode because constant float expressions can now be evaluated in the compiler instead of at runtime. The third float improvement involves object representation C, where floats are stored within the immediate object value rather than on the heap. In this object module, the float can only take up 30 bits, so the last two bits of the single precision number are lost. Previously they were just truncated, but now a heuristic is applied when recovering the float value from the object such that the last two bits are copied from the previous two. This alleviates a bias towards zero and in general improves floating point calculations when using this representation. The native and viper emitter backends have been improved to emit more optimal machine code, for example to use more compact instructions in loads and stores. This is for all supported architectures: ARM, Thumb, Xtensa, RISC-V 32, x86 and x64. Thumb v1 (for example RP2040) now supports long jumps greater than 12 bits, allowing larger Python functions to be compiled to this native architecture. Also, the inline Xtensa assembler now implements most of the LX3 opcodes, with additions including addx2, subx2, ssl and ssr, among others. Two new MCUs are supported by this release: STM32N6xx and ESP32-C2 (aka ESP8684). The STM32N6xx is a new STMicroelectronics MCU running at 800MHz with a large amount of RAM and machine-learning accelerators. MicroPython now supports this MCU with USB, XSPI memory-mapped external flash, a filesystem, basic peripherals and deepsleep. The ESP32-C2 is by Espressif and is a small and low cost RISC-V MCU with WiFi and BLE. MicroPython running on this MCU supports a REPL, filesystem, GPIO, I2C, ADC, PWM, timers, WiFi and BLE. The date range supported by the time module has now been standardized to work the same across all platforms. The functions time(), localtime() and mktime() now work properly on a reasonable range of dates, from at least 1970 up to 2099, regardless of the Epoch used by the platform. The MicroPython virtual machine is now able to avoid heap-allocating slices when subscripting bytearray and memoryview objects, for example expressions like bytearray_obj[a:b] = c. The slice object is now allocated on the C stack, helping to reduce memory churn and allowing such expressions to work when the heap is locked, for example during a hard interrupt handler. This improvement goes in the general direction of MicroPython using the heap as little as possible, making execution more deterministic. Other improvements to the core runtime include support for using __all__ in star imports, support for PEP487's __set_name__ special method, support for the _b/o/x specifier in str.format, and arrays can now be extended from any iterable, not just from an object with the buffer protocol. A new MicroPython-specific sys.implementation._thread attribute has been added, which exists when threading is enabled and tells which threading model is used (GIL or unsafe/no-GIL). The framebuf module now supports blit'ing read-only data to a FrameBuffer, which helps when implementing custom fonts that can now be stored in ROM. The DTLS implementation in the tls module now enables DTLS HelloVerify and Anti Replay protection (for the mbedTLS backend), allowing proper DTLS servers to be implemented. The lwIP socket layer now has a queue of incoming UDP and raw packets (previously it only had room for one outstanding packet), allowing for more robust and efficient UDP protocols. Mpremote has had a few improvements. There is a new fs tree command which mimics the Unix tree command, and includes the -s and -h options to show the file sizes in the output. The df command has been enhanced to use the new no-argument vfs.mount() query, and shows a much better summary of the mounted filesystems. The mip install command now uses hashes to skip files that exist. The location of the user config.py file is now more portable across many different OSes and configuration styles, thanks to the use of the platformdirs helper package. There is also support for targets without the errno module, improved disconnect handling, and better ESP-device detection for USB-CDC ports. The mpy_ld.py linker can now resolve fixed-address symbols if requested, for example on ESP8266 it can link to ROM-provided functions. There is also now support for ABS32 text relocations on ARMv6M (RP2040). These improvements extend the set of C extensions that can be compiled for such targets. Libraries that have been updated in this release include: lwIP updated to STABLE-2_2_1_RELEASE, LittleFS updated to v2.11, libhydrogen updated to the latest release, and stm32lib updated to include support for STM32N6. There have been many improvements to the test suite, to both the tests and the test runners. This is in part to aid the new Octoprobe test framework, which provides hardware-in-the-loop testing. The continuous integration testing now also includes an undefined behaviour sanitizer (UBSan) build, an address sanitizer (ASan) build, a long-long unix variant, and also testing of object representation C. MicroPython has a lot of tests! The alif port now supports pin interrupts, has improved SPI transfers, and I2C configuration now allows changing the SCL and SDA pins. The esp32 port is updated to use ESP-IDF v5.4.2, and now supports ESP32-C2. Most ESP32-based boards now auto-detect the size of their flash on boot and automatically create an appropriate vfs partition based on the size of the flash. This allows the same firmware image to work on boards with various flash sizes. This port has also added a new esp32.PCNT class along with machine.Counter and machine.Encoder, which can count input edges, including motor rotation. The PWM class has been improved, and its API now matches other ports. There is support for the LAN8670 PHY, and a new esp32.idf_task_info() function (useful with the new utop package in micropython-lib). The UART.sendbreak() method has been rewritten so that it doesn't reconfigure the UART during its execution. The nrf port has had fixes and improvements to its UART REPL to make it more robust, and work with mpremote. It also now uses the correct iRAM address for native code execution on nRF52 MCUs. The nrf implementation of machine.enable_irq() and machine.disable_irq() has been reworked so it uses the code common with all other ports, and this is a breaking change (on nrf boards only) due to the signature change of enable_irq(). Previously the signature was enable_irq(), and now the signature matches other ports, and the docs, and is enable_irq(state), where state is the return value from disable_irq(). The rp2 port now enables compressed error messages by default, which reduces firmware size by about 3000 bytes. The pico-sdk alarm pool is now used (again, instead of custom soft-time code) for power-saving delays, and lightsleep has been improved. Open drain mode has been fixed on RP2350 with more than 32 GPIOs, and support for hard IRQ timer callbacks has been added. The webassembly port has seen improvements to its FFI interface with JavaScript: it improves "has" and "get" proxying, fixes binding of self to JavaScript methods, implements equality for JsProxy objects, and reuses JsProxy references when possible to improve equality relationships of JavaScript objects on the Python side. The zephyr port has been updated to use Zephyr v4.0.0, and many improvements have been made: PWM support has been added, UARTs are now interrupt driven with ring-buffers and can set the baudrate and other parameters, GPIO supports open-drain mode, SoftI2C and SoftSPI have been enabled, and the zephyr.FlashArea class now contains constants which enumerate the available partitions. REPL reliability has also been improved and it now supports ctrl-C in the default configuration. BLE can now create services at runtime using the standard BLE.register_services() method. Other small things have been added to make the zephyr port match the behaviour of other bare-metal ports, including: boot.py and main.py are now executed at start-up, /lib is added to sys.path as appropriate, stdin/out/err have been enabled in the sys module, along with the ability to import .mpy files, and await/async keywords are enabled. This port now uses the standardized ROM configuration levels, with the default being the New boards added in this release are: GARATRONIC_PYBSTICK26_ESP32C3 and SPARKFUN_IOT_REDBOARD_ESP32 (esp32 port), SPARKFUN_REDBOARD_TURBO and SPARKFUN_SAMD21_DEV_BREAKOUT (samd port), NUCLEO_N657X0 and OPENMV_N6 (stm32 port), beagleplay_cc1352p7, nrf5340dk, nrf9151dk and rpi_pico (zephyr port). The change in code size since the previous release for select builds of various ports is (absolute and percentage change in the text section): bare-arm: -96 -0.168% minimal x86: -207 -0.112% unix x64: -376 -0.045% stm32: +3776 +0.966% cc3200: +392 +0.212% esp8266: +3484 +0.498% esp32: +19064 +1.122% mimxrt: +3600 +0.970% renesas-ra: +1296 +0.207% nrf: +1140 +0.607% rp2: +556 +0.245% (RPI_PICO board) rp2: +2252 +0.245% (RPI_PICO_W board) samd: +3296 +1.233% The leading causes of these changes in code size are: bare-arm, minimal: various code size improvements including optimized integer var-arg handling unix: remove static PATH variable (bss size reduction), implement DTLS HelloVerify and Anti Replay protection (size increase) stm32: implement machine.I2CTarget, improve accuracy of float formatting and range of time functions, improve native emitter and inline assembler, update LittleFS to v2.11. cc3200: enable io.IOBase at core feature level, avoid heap-allocating slices when subscripting built-ins. esp8266: add more LX3 opcodes to the inline assembler, update LittleFS to v2.11, native emitter improvements, add float constant folding. esp32: update to IDF 5.4.2 (+10k), implement machine.I2CTarget. mimxrt: implement machine.I2CTarget, improve accuracy of float formatting, improve native emitter, add float constant folding, update LittleFS to v2.11. renesas-ra: improve accuracy of float formatting, native emitter improvements, add float constant folding. nrf: improve accuracy of float formatting, enable io.IOBase, standardize the range of time functions. rp2 (RPI_PICO): enable compressed error messages (-3k), implement machine.I2CTarget, improve accuracy of float formatting. rp2 (RPI_PICO_W): enable compressed error messages (-3k), implement machine.I2CTarget, implement DTLS HelloVerify and Anti Replay. samd: implement machine.I2CTarget, improve accuracy of float formatting, improve native emitter, float constant folding. Thanks to everyone who contributed to this release: Alessandro Gatti, Andrea Giammarchi, Andrew Leech, Angus Gratton, Anson Mansfield, Anton Blanchard, Ayush Singh, Chris Webb, Christian Lang, Damien George, Daniel Campora, Daniël van de Giessen, David Schneider, David Yang, Detlev Zundel, Dryw Wade, dubiousjim, Elvis Pfutzenreuter, ennyKey, Garatronic, Herwin Grobben, iabdalkader, IhorNehrutsa, Jeff Epler, Jim Mussared, Jonathan Hogg, Jos Verlinde, Koudai Aono, Malcolm McKellips, Matt Trentini, Maureen Helm, Meir Armon, Patrick Joy, Peter Harper, Phil Howard, purewack, Rick Sorensen, robert-hh, root, SiZiOUS, stijn, TianShuang Ke, Vdragon, Yanfeng Liu, Yoctopuce dev, Yuuki NAGAO. MicroPython is a global Open Source project, and contributions were made from the following timezones: -0600, -0500, -0400, -0300, +0000, +0100, +0200, +0300, +0530, +0800, +0900, +1000, +1100. The work done in this release was funded in part through GitHub Sponsors, and in part by George Robotics, Espressif, Arduino, OpenMV, Yoctopuce, Microbric and Planet Innovation. What follows is a detailed list of changes, generated from the git commit history, and organized into sections. Main components all: rename the "NORETURN" macro to "MP_NORETURN" bump Ruff version to v0.11.6 go back to using default ruff quote style py core: objrange: match CPython range slicing objstr: fix handling of OP_MODULO with namedtuple dynruntime.mk: fix use of musl's libm.a when LINK_RUNTIME=1 mkrules.cmake: add CMake support for compressed error messages make struct-initializing macros compatible with C++ malloc: add mutex for tracked allocations modthread: initialize thread state nlr_top to NULL makeversionhdr.py: change utcfromtimestamp() to fromtimestamp() mpconfig: enable io.IOBase at core feature level emitinlinethumb: refactor string literal as array initializer objstr: add support for the :_b/o/x specifier in str.format emitnative: improve Viper register-indexed code for Arm emitnative: improve Viper register-indexed code for Thumb emitnative: refactor Viper register-indexed load/stores asm: remove unused generic ASM API opcode definitions asmthumb: generate proper sequences for large register offsets emitnative: clean up int-indexed Viper load/store code persistentcode: allow a port a custom commit function and track data asmxtensa: replace printf messages with exceptions asmxtensa: make the generated code dumper work on mpy-cross emitinlinextensa: add the rest of LX3 opcodes to the assembler asmxtensa: emit prologue jump only when constants table is in use scheduler: only run scheduler callbacks queued before run started emitnative: let Viper int-indexed code use appropriate operands asmthumb: extend load/store generators with ARMv7-M opcodes asmxtensa: extend existing specialised load/store operations range emitnative: remove redundant RV32 Viper int-indexed code asmarm: extend int-indexed 32-bit load/store offset ranges asmarm: give a proper name to the temporary register asmxtensa: extend BCCZ range to 18 bits asmxtensa: extend BCC range to 18 bits asmthumb: implement long jumps on Thumb/armv6m architecture dynruntime.mk: enable single-precision float by default on armv6/7m parsenum: reduce code size in check for inf/nan parsenum: further reduce code size in check for inf/nan objarray: allow extending array with any iterable parsenum: fix parsing complex literals with negative real part objfloat: change MSVC workaround for NAN being a constant mpz: avoid undefined behavior decrementing NULL objlist: reduce code size in slice operations mpprint: remove unused "PF_FLAG_NO_TRAILZ" flag asmbase: fix assertion error with viper code fix undefined left shift operations modio: fix the case where write fails in BufferedWriter.flush repl: skip private variables when printing tab completion options runtime: add support for using all in star import obj: fix nan handling in object REPR_C and REPR_D misc: fix fallback implementation of mp_popcount misc: introduce macros to check values' bits size asmrv32: implement the full set of Viper load/store operations asmarm: implement the full set of Viper load/store operations asmxtensa: implement the full set of Viper load/store operations asmthumb: remove redundant load/store opcode implementations asmx86: implement the full set of Viper load/store operations asmx64: implement the full set of Viper load/store operations asmthumb: clean up integer-indexed load/store emitters emitnative: let emitters know the compiled entity's name runtime: initialize profile fields in mp_thread_init_state profile: fix printing lineno in frame objects bc: factor out helper for line-number decoding showbc: use line-number decoding helper objcode: implement co_lines method obj: add functions to retrieve large integers from mp_obj_t vm: avoid heap-allocating slices when subscripting built-ins mpprint: rework integer vararg handling objint_longlong: add arithmetic overflow checks smallint: update mp_small_int_mul_overflow() to perform the multiply parsenum: extend mp_parse_num_integer() to parse long long objcode: remove co_lnotab from v2 preview mkrules.mk: mute blobless errors modsys: add sys.implementation._thread attribute obj: fix REPR_C bias toward zero obj: add new type flag to indicate subscr accepts slice-on-stack objint_longlong: fix left shift of negative values mpconfig: define new HEX_FMT formatting macro cast type names to qstr explicitly fix mp_printf integer size mismatches objcell: fix printing of cell ID/pointer mpprint: fix printing pointers with upper bit set objint_mpz: fix pow3 where third argument is zero objint_longlong: fix overflow check in mp_obj_int_get_checked objint_longlong: fix longlong interoperability with floats objtype: add support for PEP487 set_name mphal: add stddef.h header for size_t objboundmeth: add option to use mp_is_equal instead of == comparison parsenum: refactor float parsing code formatfloat: improve accuracy of float formatting code parse: add support for math module constants and float folding asmthumb: don't corrupt base register in large offset store parse: fix missing nlr_pop call in complex path of binary_op_maybe extmod: machine_usb_device: add exception text wrappers modbluetooth: use newer mp_map_slot_is_filled function asyncio: fix early exit of asyncio scheduler create common cyw43 driver config header cyw43: move the LWIP responder fix into common CYW43 config moductypes: refactor string literal as array initializer modlwip: implement a queue of incoming UDP/raw packets vfs_lfsx: fix errno value raised from chdir modjson: detect unterminated composite entities network_cyw43: disconnect STA if making inactive modlwip: add optional flags argument for recv and recvfrom modbluetooth: add timeout to deinit modframebuf: add support for blit'ing read-only data modnetwork: consolidate definition of common drivers modre: use specific error message if regex is too complex machine_pulse: optimise time_pulse_us for code size modlwip: fix crash when calling recv on listening socket network_lwip: add sys_untimeout_all_with_arg helper function mbedtls: implement DTLS HelloVerify cookie support mbedtls: implement recommended DTLS features, make optional mbedtls: undefine ARRAY_SIZE if defined by platform vfs_lfsx: allow overriding the LFS2 on-disk version format vfs_posix: add additional readonly checks vfs_posix: add MICROPY_VFS_POSIX_WRITABLE option modlwip: print timeout with correct format string modtls_mbedtls: do gc_collect and retry ssl_init on any error machine_i2c_target: add new machine.I2CTarget class shared: tinyusb: use device event hook to schedule USB task timeutils: standardize supported date range on all platforms netutils: cast the ticks value before printing drivers: ninaw10/machine_pin_nina: add exception text wrappers esp-hosted: rename Bluetooth HCI backend driver ninaw10: rename Bluetooth HCI backend driver cyw43: remove old BTHCI UART backend esp-hosted: replace EVENT_POLL_HOOK with mp_event_wait_ms support special QSPI direct-read protocol mpy-cross: main: exit with error if arch not specified with emit=native main: document emit=host option in help lib: lwip: update lwIP to STABLE-2_2_1_RELEASE littlefs: update LittleFS to v2.10.2 littlefs: reuse existing CRC32 function to save space littlefs: fix string initializer in lfs1.c littlefs: update LittleFS to v2.11 libhydrogen: update to latest release berkeley-db-1.xx: update submodule to latest libm_dbl: support FLT_EVAL_METHOD == 16 stm32lib: update library for N6 v1.1.0 pico-sdk: fix Pico SDK fetching develop picotool micropython-lib: update submodule to latest Support components docs: zephyr: add quick reference for PWM support zephyr: add zephyr FlashArea IDs docs fix SparkFun capitalization esp32: improve PWM documentation and examples esp32/quickref: add PWM lightsleep example reference/mpremote: document the 'fs tree' command library/time: amend the documentation of time.mktime() esp32/quickref: mention the different timer counts esp32: mention the use of Timer(0) by UART.IRQ_RXIDLE add a description of recv/recvfrom flags argument rp2: document the new rp2 Timer hard= option develop/natmod: add notes on Picolibc and natmods reference/speed_python: document schedule/GIL limitation of native document PEP487 set_name implementation library/bluetooth: document all allowed args to UUID constructor library/rp2.StateMachine: add a note about PIO in and jmp pins library/btree: fix method links to explicitly specify class library: document the new machine.I2CTarget class esp32: add documentation for esp32.PCNT library/machine: add docs for Counter and Encoder reference/mpremote: document location of config file examples: natmod/random: fix build for Xtensa natmod/framebuf: fix build for Xtensa natmod/deflate: fix build for Xtensa natmod/btree: fix build for Xtensa rp2/pio_uart_rx.py: fix use of PIO constants natmod/btree: fix build on RV32 with Picolibc natmod: use LINK_RUNTIME=1 when building for armv6m usercmodule: cast arguments for printf bluetooth/ble_advertising.py: fix decoding UUIDs tests: basics/builtin_range.py: add more tests for range slicing extmod: skip binascii tests when hexlify/unhexlify don't exist extmod/vfs_lfs_ilistdir_del.py: skip test if not enough memory extmod/vfs_mountinfo.py: don't import unused errno module extmod/vfs_posix.py: fix test on Android net_hosted: only run network loopback test on supported targets ports/rp2: convert rp2.DMA test to a unittest ports/rp2: tune rp2.DMA test so it runs in all configurations extmod: rename ssl tests that only use the tls module net_inet: update micropython.org certificate for SSL tests extmod/vfs_rom.py: clear sys.path before running test multi_net: add test that requires queuing UDP packets ports/rp2: update machine idle test to revert skip for RP2350 ports/rp2: add a test case for light sleeping from CPU1 cpydiff: document format separator difference extmod/vfs_lfs_error.py: test value of all OSError's errno cpydiff: explain the numeric literal parsing difference cpydiff: document that uPy requires space after number+period cpydiff: add test of underscore-in-literals cpydiff: ensure all have two levels of category run-tests.py: add list of passed/skipped tests to _result.json micropython/viper_ptr: add tests for arch edge cases float/math_constants.py: test actual e and pi constant values run-tests.py: change _results.json to have a combined result list multi_net: add test coverage for socket recv flag MSG_PEEK multi_net: add test coverage for socket recv flag MSG_DONTWAIT run-natmodtests.py: allow injected code customisation run-tests.py: automatically skip tests that are too large run-tests.py: remove filename arg from prepare_script_for_target run-tests.py: unconditionally enable native tests if asked extmod/random_extra_float.py: skip when funcs not available run-tests.py: factor out helper function to create test report run-multitests.py: create a _result.json at end of run run-natmodtests.py: create a _result.json at end of run run-perfbench.py: create a _result.json at end of run run-natmodtests.py: consider a test skipped if mpy doesn't exist ports/rp2: add tests for rp2-specific timer options cpydiff: document complex() parsing difference extmod: add platform_basic.py for basic coverage test of platform run-tests.py: add support for ctrl keys in REPL tests cmdline: add a test for REPL paste mode micropython: improve viper ptr boundary tests run-tests.py: allow injected code customisation misc: improve test coverage of py/profile.c extmod/machine_uart_tx.py: support STM32WB boards extmod_hardware: add UART config for STM32WB boards extmod_hardware/machine_uart_irq_rxidle.py: ignore inital IRQ extmod_hardware/machine_uart_irq_rxidle.py: test multiple writes ports/stm32: tweak tests to run on a wider set of boards extmod/select_poll_eintr.py: skip test if target can't bind basics/fun_code_full: test code objects with full feature set basics/fun_code_colines: test decoded co_lines values extmod/asyncio_iterator_event.py: use format instead of f-string micropython: add missing SystemExit after printing SKIP run-tests.py: consider tests ending in _async.py as async tests extmod: close UDP sockets at end of test add specific tests for "long long" 64-bit bigints extmod/json_loads_int_64.py: add test cases for LONGINT parse thread: rename thread_lock4 test to thread_lock4_intbig skip bm_pidigits perf test if no arbitrary precision int support basics/fun_code_lnotab: test removal of co_lnotab from v2 extmod/select_poll_eintr.py: pre-allocate global variables thread/stress_aes.py: reduce test time on PC targets run-tests.py: detect threading and automatically run thread tests thread: allow thread tests to pass with the native emitter net_inet: update micropython.org certificate for SSL tests run-tests.py: use TEST_TIMEOUT as timeout for bare-metal tests extmod_hardware/machine_uart_irq_break.py: remove send_uart multi_bluetooth: synchronise MTU exchange in BLE MTU tests multi_net: update DTLS multi-net test extmod: add (failing) test for VfsPosix in readonly mode micropython: rename viper boundary tests that depend on big int basics: add tests for PEP487 set_name internal_bench/class_create: benchmark class creation internal_bench/var: benchmark descriptor access run-internalbench.py: allow running internalbench on hardware run-natmodtests.py: automatically skip tests that are too large multi_bluetooth: extend the deep sleep test timeout run-multitests.py: escape encoding errors instead of crashing cpydiff: remove passing types_float_rounding test micropython: test that viper offset stores don't clobber base reg extmod_hardware: add self unittest for I2CTarget multi_extmod: add I2CTarget multi tests extmod_hardware: add basic tests for machine.Counter and Encoder tools: mpremote: use zlib.compressobj instead of zlib.compress mpremote/tests: add tests for errno behavior mpremote: refactor error handling to apply generally to any errno mpremote: fix possibly-missing EOPNOTSUPP errno name mpremote/tests: add test for rm -r on /remote vfs mpremote: prevent deletion of /remote files via rm -r ci.sh: update URL for xtensa-lx106-elf-standalone.tar.gz mpremote: for mip install, use hash to skip files that exist verifygitlog.py: apply stricter rules on git subject line verifygitlog.py: disallow a leading slash in commit subject line verifygitlog.py: allow long co-author and sign-off names gen-cpydiff.py: improve stdout vs stderr interleaving gen-cpydiff.py: fix RST heading generation gen-cpydiff.py: ensure every item has at least 2 TOC levels mpremote: add new 'fs tree' command mpremote/tests: add tests for 'fs tree' command pyboard.py: avoid initial blocking read in read_until() pyboard.py: introduce timeout_overall for read_until() pyboard.py: add write_timeout and catch errors in enter_raw_repl mpy_ld.py: resolve fixed-address symbols if requested ci.sh: remove natmod build restrictions for Xtensa ci.sh: clean the correct MPY files when batch compiling ci.sh: allow errors in code-size build to fail the CI boardgen.py: ensure board pin locals_dict has consistent order ci.sh: fix nanbox CI test runs mpy_ld.py: support R_ARM_ABS32 relocation in text mpremote: improve df command to use new no-arg vfs.mount() query ci.sh: add functions for sanitizer builds autobuild: build alif boards as part of auto-build ci.sh: disable "stack use after return" in ASan build mpremote: fix disconnect handling on Windows and Linux ci.sh: increase test timeout to 60s in coverage jobs mpremote: support OSError's on targets without errno ci.sh: always call apt-get update before apt-get install pyboard.py: align execpty prefix ci.sh: increase timeout for unix qemu test runs ci.sh: increase timeout for stackless clang test runs ci.sh: skip thread/stress_heap.py test on macOS test run ci.sh: skip thread/stress_recurse.py on unix qemu test runs ci.sh: change averaging to 1 for run-perfbench.py test pyboard.py: add timeout argument to Pyboard.exec_/exec ci.sh: test building all natmod examples with all ARM-M archs mpremote: fix errno.ENOTBLK attribute error on Windows mpremote: update ESPxxx detection for USB-CDC ports mpremote: add platformdirs dependency to requirements.txt mpremote: locate config.py location across different host OSes CI: workflows: split QEMU/Arm builds into separate entries workflows: use windows-latest runner for all Windows CI jobs workflows: add sanitize_undefined workflow to unix port CI workflows: run the address sanitizer (ASan) build during CI workflows: remove the unix "settrace" CI job workflows: use Python 3.11 for unix coverage testing workflows: add new CI job to test unix port with GIL enabled workflows: build unix port for docs and run workflow more often workflows: add a CI job to build ESP32-C2 and ESP32-C6 boards The ports all ports: fix SparkFun capitalization update board.json files for vendor/product consistency eliminate define of {U,}INT_FMT where redundant define new HEX_FMT formatting macro alif port: create common cyw43 driver config header Makefile: create firmware.zip with files needed for deploying boards/ALIF_ENSEMBLE: add board.json and deploy instructions README: update README with build instructions Makefile: allow specifying a custom build directory machine_pin: add support for machine.Pin IRQ machine_spi: improve transfer function to poll events lwip_inc: refactor lwipopts.h to use extmod's common options machine_i2c_target: implement I2CTarget class machine_i2c: allow changing I2C SCL/SDA pins bare-arm port: no changes specific to this component/port cc3200 port: no changes specific to this component/port embed port: port: fix alloca include for Windows platforms esp8266 port: main: print error information on crash-induced reboots modmachine: use common machine_time_pulse_us implementation esp32 port: enable compressed error messages by default esp32_common.cmake: skip BTree module when requested tools: update metrics_esp32 script for ESP-IDF >=v5.4.x esp32_common.cmake: use the tinyusb source files from ESP-IDF machine_timer: fix timer.value() for an uninitialized timer esp32_common.cmake: allow adding defines and compiler flags main: make the entry point function name configurable machine_uart: correctly manage UART queue and event task network_common: raise a memory error on ESP_ERR_NO_MEM network_ppp: restructure to match extmod/network_ppp_lwip machine_pwm: improve PWM and make its API match other ports mpconfigport: document how to get more debug info mpthreadport: fix double delete of tasks on soft reset update to use ESP-IDF v5.4.1 network_lan: add support for LAN8670 PHY modesp32: implement esp32.idf_task_info() machine_i2c: fix default I2C pins for C3, S3 network_lan: add PHY_GENERIC device type boards/SPARKFUN_IOT_REDBOARD_ESP32: add SparkFun board modsocket: add optional flags argument for recv and recvfrom machine_timer: do not free interrupt from ISR re-use allocated timer interrupts and simplify UART timer code update ADC driver update to the new esp_adc API main: auto detect the size of flash and auto create vfs partition boards: convert all boards to auto detect flash size README: update README to describe auto filesystem sizing modesp32: make wake_on_ulp available only on SoCs that support it modesp32: make wake_on_touch available only on SoCs supporting it modesp32: make wake_on_ext0 available only on SoCs supporting it modesp32: make wake_on_ext1 available only on SoCs supporting it modesp32: fix access to ext0_pin only if defined boards/GARATRONIC_PYBSTICK26_ESP32C3: add pybstick26-esp32c3 defn panichandler: support building against IDFv5.4.2 machine_uart: improve sendbreak so it doesn't reconfig the UART update to use ESP-IDF v5.4.2 add support for ESP32-C2 (aka ESP8684) add "Free RAM" optimisation config flags fix first line ESP32-C2 serial output after reset or deepsleep machine_i2c: factor default pin macros to header file machine_i2c_target: implement I2CTarget class modesp32: add esp32.PCNT class modules/machine.py: add Counter and Encoder classes mpconfigport: disable I2CTarget on ESP32-C6 to reduce code size machine_timer: enable timer clock source for ESP32C6 machine_timer: fix machine.Timer() tick frequency on ESP32C2,C6 mimxrt port: machine_uart: enable CTS SION so it can be read cyw43_configport: update cyw43 config to use new BTHCI UART create common cyw43 driver config header machine_i2c_target: support I2C target mode minimal port: no changes specific to this component/port nrf port: use correct IRAM address for native code execution on nRF52 only process interrupt chars on UARTs used for REPL fix UART write on parts that can't write more than 255 bytes boards: use 64 byte raw-paste buffer on PCA10028 and PCA10040 use common implementation of machine disable/enable IRQ revert "nrf/Makefile: Enable LTO by default only on newer gcc." drivers/bluetooth: change soft-device download URL to self hosted pic16bit port: no changes specific to this component/port powerpc port: no changes specific to this component/port qemu port: Makefile: allow passing flags to test_natmod via RUN_TESTS_EXTRA renesas-ra port: replace MICROPY_EVENT_POLL_HOOK with mp_event_wait mpconfigport: enable MICROPY_TIME_SUPPORT_Y1969_AND_BEFORE rp2 port: add exception text wrappers enable compressed error messages by default create common cyw43 driver config header move the LWIP responder fix into common CYW43 config Makefile: add deploy target that uses picotool load rp2_dma: fix default value used in pack_ctrl on RP2350 add temporary workaround for GCC 15.1 build failure use pico-sdk alarm pool instead of soft timer for sleep modmachine: add debug code for mp_machine_lightsleep modmachine: add mutual exclusion for machine.lightsleep() disable the LWIP tick timer when not needed machine_pin: replace macros with Pico SDK functions machine_pin: fix simulated open drain with more than 32 GPIOs boards/SPARKFUN_XRP_CONTROLLER_BETA: fix default I2C to use I2C1 make FLASH LENGTH match PICO_FLASH_SIZE_BYTES in .ld files machine_timer: support hard IRQ timer callbacks rp2_flash: add MICROPY_HW_FLASH_MAX_FREQ to replace fixed max freq rp2_flash: add default MICROPY_HW_FLASH_MAX_FREQ CMakeLists.txt: make board's pins.csv configurable CMakeLists.txt: make linker script configurable mpnetworkport: deregister all sys timeouts when netif is removed modmachine: do not use deprecated XOSC_MHZ and XOSC_KHZ rp2_pio: configure jmp_pin for PIO use if it's isolation is set CMakeLists.txt: fix flash size check logic rp2_pio: fix use of PIO2 in prog data structure machine_i2c: factor default pin macros to header file machine_i2c_target: implement I2CTarget class rp2_flash: add binary info for ROMFS samd port: boards/SAMD_GENERIC_Dxxx: add Microchip URL to board.json machine_i2c: add the timeout keyword argument to the constructor modtime: change time.time_ns() to follow the RTC time boards/SAMD_GENERIC_D51xxx: fix VFS settings for internal flash samd_spiflash: improve the flash type detection samd_qspiflash: remove the attempt to handle a unknown device boards: add two SparkFun SAMD21 boards boards: change the SparkFun vendor name to SparkFun machine_i2c_target: support I2C target mode stm32 port: main: replace mp_stack_set calls with new mp_cstack_init_with_top cyw43_configport: update cyw43 config to use new BTHCI UART create common cyw43 driver config header allow QSPI to work on STM32G4 machine_adc: enable ADC re-read errata handling for STM32WB55 boards/ARDUINO_PORTENTA_H7: free reserved timer main: add support for additional GC blocks boards/ARDUINO_GIGA: define additional GC blocks in SDRAM uart: enable UART FIFO for H7 MCUs adc: apply re-read errata for WB55 adc: simplify ADC calibration settings adc: fix core temperature reading on WB55 machine_adc: fix internal ADC channel reading on WB MCUs uart: suppress additional RX idle IRQs on F4/L1 irq: change SPI IRQ priority to be higher than DMA IRQ dma: extend STM32H5 DMA use to SPI3 and SPI4 machine_adc: add machine.ADC implementation for STM32L1 boards/make-pins.py: support up to GPIO-O add support for STM32N6xx MCUs main: disable D-cache when debugging N6 lwip_inc: increase lwIP memory on N6 boards: add board support files for N6 mboot: add support for STM32N6xx MCUs spi: fail spi_init if pins can't be configured boards/OPENMV_N6: add new board definition files boards/NUCLEO_N657X0: add new board definition files stm32.mk: error out if compiling for cortex-m55 on old gcc add casts when printing small integers i2c: move I2C IRQ handlers from stm32_it.c to i2c.c i2cslave: change irq handler name to i2c_slave_irq_handler i2cslave: add functions to read/write I2C data i2cslave: support i2c_slave_process_tx_end callback on F4 i2cslave: account for slow addr_match callback machine_i2c_target: implement I2CTarget class unix port: variants: enable os.uname() in coverage build for tests main: remove PATH_MAX from realpath mpthreadport: work around lack of thread cancellation on Android coveragecpp: verify struct-initializing macros' C++-compatibility modsocket: expose MSG_PEEK flag for recv & recvfrom coverage: add coverage test for mp_sched_schedule_node coverage: add coverage test for left adjusted print README: add some small documentation about sanitizers variants/coverage: enable sys.settrace coverage: initialize more code_state fields coverage: add missing MP_OBJ_FROM_PTR casts Makefile: drop include path of "i686-linux-gnu" coverage: expand mp_printf coverage tests variants: add a 'longlong' variant to test 64-bit bigints in CI allow the GIL to be enabled variants/longlong: use REPR_C on this variant mpconfigport: include time.h to get definition of time_t mpthreadport: ensure consistent type of PTHREAD_STACK_MIN coverage: avoid type checking an invalid string coverage: cast type names to qstr explicitly coverage: cast values to fit %x formatting code coverage: cast values to int for format printing coverage: provide argmuents of expected integer types coverage: remove unused printf arguments webassembly port: objpyproxy: avoid throwing on symbol or iterator has-check objpyproxy: avoid throwing on implicit symbols access proxy_c: provide constants for fixed JsProxy refs objjsproxy: fix binding of self to JavaScript methods objjsproxy: implement equality for JsProxy objects proxy_js: reuse JsProxy ref if object matches windows port: no changes specific to this component/port zephyr port: fix prj.conf for v4.1-rc1 fix call to thread_analyzer_print for v4.0 remove reference to CONFIG_MMC_VOLUME_NAME for v4.0 upgrade to Zephyr v4.0.0 machine_pwm: implement PWM support boards: enable PWM on beagleconnect_freedom create options to enable frozen modules boards: add nrf5340dk board configuration boards: add nrf9151dk board configuration create ability to use device_next with CDC ACM as REPL introduce auto-listing of FlashArea Partitions boards: enable ADC on beagleconnect_freedom modbluetooth_zephyr: allow BLE to create services at runtime mpconfigport: fix mp_int_t and mp_uint_t to work on 64-bit archs boards: add support for BeaglePlay CC1352p7 boards/beagleconnect_freedom: enable networking boards/beagleconnect_freedom: remove board overlay machine_uart: complete UART driver and make it interrupt driven machine_pin: configure OUT pin also as input so it's readable boards: disable WDT on qemu boards and networking for cortex_m3 README: update URL describing QEMU network settings prj.conf: use UART for console as default, not CONSOLE_SUBSYS update generated header path main: execute boot.py and main.py like other ports main: add /flash/lib or /sd/lib to sys.path on start up enable sys.stdin/out/err src: increase UART input buffer to 512 bytes and reduce latency src: fix USB device_next driver to work with zephyr 4.0.0 machine_pin: add Pin.OPEN_DRAIN constant machine_pin: allow constructing a Pin with an existing Pin mphalport: implement C-level pin HAL mpconfigport: enable machine.SoftI2C and machine.SoftSPI mpconfigport: enable import of mpy and a few related features mpconfigport: enable MICROPY_NLR_THUMB_USE_LONG_JUMP boards/frdm_k64f: improve board configuration boards/nucleo_wb55rg: enable BLE, I2C, SPI and add filesystem boards/rpi_pico: add board configuration for rpi_pico mpconfigport: enable sys.maxsize mpconfigport: enable emergency exception buffer machine_timer: make machine.Timer id argument optional machine_pin: retry configuring gpio with just GPIO_OUTPUT mpconfigport_minimal: use MICROPY_CONFIG_ROM_LEVEL_MINIMUM mpconfigport: use MICROPY_CONFIG_ROM_LEVEL_BASIC_FEATURES machine_i2c_target: implement I2CTarget class