2019-10-09 02:27:08 -04:00
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CircuitPython port to Spresense
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==============================
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This directory contains the port of CircuitPython to Spresense. It is a compact
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development board based on Sony’s power-efficient multicore microcontroller
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CXD5602.
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Board features:
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* Integrated GPS
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* The embedded GNSS with support for GPS, QZSS and GLONASS enables applications
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where tracking is required.
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* Hi-res audio output and multi mic inputs
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* Advanced 192kHz/24 bit audio codec and amplifier for audio output, and
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support for up to 8 mic input channels.
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* Multicore microcontroller
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* Spresense is powered by Sony's CXD5602 microcontroller (ARM® Cortex®-M4F × 6
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cores), with a clock speed of 156 MHz.
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Currently, Spresense port does not support GNSS, Audio and Multicore.
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Refer to [developer.sony.com/develop/spresense/](https://developer.sony.com/develop/spresense/)
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for further information about this board.
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Build instructions
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------------------
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Pull all submodules into your clone:
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$ git submodule update --init --recursive
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Build the MicroPython cross-compiler:
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$ make -C mpy-cross
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2019-10-11 02:09:15 -04:00
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Change directory to cxd56:
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2019-10-09 02:27:08 -04:00
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2019-10-11 02:09:15 -04:00
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$ cd ports/cxd56
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2019-10-09 02:27:08 -04:00
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To build circuitpython image run:
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$ make
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USB connection
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--------------
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Add user to `dialout` group:
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$ sudo usermod -a -G dialout <user-name>
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Connect the Spresense main board to the PC via the USB cable.
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Flash the bootloader
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--------------------
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The correct bootloader is required for the Spresense board to function.
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Bootloader information:
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* The bootloader has to be flashed the very first time the board is used.
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* You have to accept the End User License Agreement to be able to download and use the Spresense bootloader binary.
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Download the spresense binaries zip archive from: <https://developer.sony.com/file/download/download-spresense-firmware-v1-4-000>
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Extract spresense binaries in your PC to ports/spresense/spresense-exported-sdk/firmware/
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To flash the bootloader run the command:
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$ make flash-bootloader
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Flash the circuitpython.spk image
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---------------------------------
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To flash the firmware run the command:
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$ make flash
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Accessing the board
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-------------------
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Connect the Spresense extension board to the PC via the USB cable.
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Once built and deployed, access the CircuitPython REPL (the Python prompt) via USB. You can run:
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$ screen /dev/ttyACM0 115200
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