circuitpython/ports/renesas-ra

The Renesas RA port

This is a port of MicroPython to the Renesas RA family of microcontrollers. Currently supported features are:

• Filesystem on the internal flash using FatFs.
• utime module with sleep, time, and ticks functions.
• uos module with VFS support.
• machine module with the following classes: Pin, ADC, I2C, SPI, SoftI2C, SoftSPI, UART, RTC
• sdcard driver if frozen driver is installed.

Currently supported board product names are:

• EK-RA6M2
• RA4M1 CLICKER
• EK-RA6M1
• EK-RA4M1
• EK-RA4W1

Please refer to the quick reference of renesas-ra port for more information about the boards.

Build instructions

• MicroPython cross-compier The MicroPython cross-compiler must be built first, which will be used to pre-compile (freeze) built-in Python code. THis cross-compiler is built and run on the host machine, using:

  $ make -C mpy-cross
  

  This command should be executed from the root directory of this repository. All other commands below should be executed from the ports/renesas-ra/ directory.

• Arm compiler An Arm compiler is required for the build, along with the associated binary utilities. The default compiler is arm-none-eabi-gcc, which is available for Linux, Mac and Windows hosts via https://developer.arm.com/downloads/-/arm-gnu-toolchain-downloads. The compiler can be changed using the CROSS_COMPILE variable when invoking make.

• Obtain submodules First the submodules must be obtained using:

  $ make submodules
  

• Build binary image .hex Then to build for a given board subdirectory name, run:

  $ make BOARD=EK_RA6M2 clean
  $ make BOARD=EK_RA6M2
  

  The default board subdirectory name is EK_RA6M2 (which is for EK-RA6M2 board) but any of the names of the subdirectories in the boards/ directory can be passed as the argument to BOARD=; for example RA4M1_CLICKER, EK_RA4M1, EK_RA4W1 and EK_RA6M1. The above command should produce binary images firmware.hex in the build-EK_RA6M2/` subdirectory (or the equivalent directory for the board specified).

Supported/Unsupprted funtions

Please refer to the renesas-ra quick reference.

Known issues

all boards

• machine.lightsleep(time_ms) and machine.deepsleep(time_ms) raise uncaught exceptions.

  machine.deepsleep(1000) Uncaught exception in ExtInt interrupt handler line 16 TypeError:

RA4M1-CLICKER

• mpremote: mount command is not available due to limited memory resources.

EK-RA4M1

• mpremote: mount command is not available due to limited memory resources.

EK-RA4W1

• mpremote: "Execution: timeout waiting for remote" error happens when importing a file on /remote.