CircuitPython port to Spresense¶
This directory contains the port of CircuitPython to Spresense. It is a compact development board based on Sony’s power-efficient multicore microcontroller CXD5602.
- Integrated GPS
- The embedded GNSS with support for GPS, QZSS and GLONASS enables applications where tracking is required.
- Hi-res audio output and multi mic inputs
- Advanced 192kHz/24 bit audio codec and amplifier for audio output, and support for up to 8 mic input channels.
- Multicore microcontroller
- Spresense is powered by Sony’s CXD5602 microcontroller (ARM® Cortex®-M4F × 6 cores), with a clock speed of 156 MHz.
Currently, Spresense port does not support GNSS, Audio and Multicore.
Refer to developer.sony.com/develop/spresense/ for further information about this board.
Add user to
$ sudo usermod -a -G dialout <user-name>
Download and install USB serial driver
Pull all submodules into your clone:
$ git submodule update --init --recursive
Build the MicroPython cross-compiler:
$ make -C mpy-cross
Change directory to cxd56:
$ cd ports/cxd56
To build circuitpython image run:
$ make BOARD=spresense
Spresense main board to the PC via the USB cable.
Flash the bootloader¶
The correct bootloader is required for the Spresense board to function.
- The bootloader has to be flashed the very first time the board is used.
- You have to accept the End User License Agreement to be able to download and use the Spresense bootloader binary.
Download the spresense binaries zip archive from: Spresense firmware v1-4-000
Extract spresense binaries in your PC to ports/spresense/spresense-exported-sdk/firmware/
To flash the bootloader run the command:
$ make BOARD=spresense flash-bootloader
Flash the circuitpython image¶
To flash the firmware run the command:
$ make BOARD=spresense flash
Accessing the board¶
Spresense extension board to the PC via the USB cable.
Once built and deployed, access the CircuitPython REPL (the Python prompt) via USB. You can run:
$ screen /dev/ttyACM0 115200