2019-12-14 14:34:26 -05:00
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# Building CircuitPython
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Welcome to CircuitPython!
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This document is a quick-start guide only.
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Detailed guides on how to build CircuitPython can be found in the Adafruit Learn system at
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2019-12-16 20:15:53 -05:00
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https://learn.adafruit.com/building-circuitpython/
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2019-12-14 14:34:26 -05:00
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## Setup
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Please ensure you setup your build environment appropriately, as per the guide. You will need:
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* Linux: https://learn.adafruit.com/building-circuitpython/linux
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* MacOS: https://learn.adafruit.com/building-circuitpython/macos
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* Windows Subsystem for Linux (WSL): https://learn.adafruit.com/building-circuitpython/windows-subsystem-for-linux
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### Submodules
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This project has a bunch of git submodules. You will need to update them regularly.
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git submodule sync
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2019-12-17 19:17:46 -05:00
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git submodule update --init
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2019-12-14 14:34:26 -05:00
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### mpy-cross
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As part of the build process, mpy-cross is needed to compile .py files into .mpy files.
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To compile (or recompile) mpy-cross:
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make -C mpy-cross
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# Building
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There a number of ports of CircuitPython! To build for your board, change to the appropriate ports directory and build.
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Examples:
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cd ports/atmel-samd
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make BOARD=circuitplayground_express
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cd ports/nrf
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make BOARD=circuitplayground_bluefruit
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If you aren't sure what boards exist, have a peek in the boards subdirectory of your port.
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2019-12-17 18:59:54 -05:00
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If you have a fast computer with many cores, consider adding `-j` to your build flags, such as `-j17` on
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a 6-core 12-thread machine.
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2019-12-14 14:34:26 -05:00
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# Testing
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If you are working on changes to the core language, you might find it useful to run the test suite.
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The test suite in the top level `tests` directory. It needs the unix port to run.
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cd ports/unix
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make axtls
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make micropython
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Then you can run the test suite:
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cd ../../tests
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./run-tests
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A successful run will say something like
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676 tests performed (19129 individual testcases)
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676 tests passed
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30 tests skipped: buffered_writer builtin_help builtin_range_binop class_delattr_setattr cmd_parsetree extra_coverage framebuf1 framebuf16 framebuf2 framebuf4 framebuf8 framebuf_subclass mpy_invalid namedtuple_asdict non_compliant resource_stream schedule sys_getsizeof urandom_extra ure_groups ure_span ure_sub ure_sub_unmatched vfs_basic vfs_fat_fileio1 vfs_fat_fileio2 vfs_fat_more vfs_fat_oldproto vfs_fat_ramdisk vfs_userfs
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# Debugging
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2019-12-17 09:48:55 -05:00
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The easiest way to debug CircuitPython on hardware is with a JLink device, JLinkGDBServer, and an appropriate GDB.
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2019-12-14 14:34:26 -05:00
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Instructions can be found at https://learn.adafruit.com/debugging-the-samd21-with-gdb
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2019-12-17 09:48:55 -05:00
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If using JLink, you'll need both the `JLinkGDBServer` and `arm-none-eabi-gdb` running.
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2019-12-14 14:34:26 -05:00
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Example:
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JLinkGDBServer -if SWD -device ATSAMD51J19
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2019-12-17 09:48:55 -05:00
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arm-none-eabi-gdb build-metro_m4_express/firmware.elf -iex "target extended-remote :2331"
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2019-12-17 18:59:54 -05:00
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If your port/build includes `arm-none-eabi-gdb-py`, consider using it instead, as it can be used for better register
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debugging with https://github.com/bnahill/PyCortexMDebug
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