a1052d5f73
This targets the 64-bit CPU Raspberry Pis. The BCM2711 on the Pi 4 and the BCM2837 on the Pi 3 and Zero 2W. There are 64-bit fixes outside of the ports directory for it. There are a couple other cleanups that were incidental: * Use const mcu_pin_obj_t instead of omitting the const. The structs themselves are const because they are in ROM. * Use PTR <-> OBJ conversions in more places. They were found when mp_obj_t was set to an integer type rather than pointer. * Optimize submodule checkout because the Pi submodules are heavy and unnecessary for the vast majority of builds. Fixes #4314 |
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| .. | ||
| boards/spresense | ||
| common-hal | ||
| configs/circuitpython | ||
| mkspk | ||
| spresense-exported-sdk@6a148be849 | ||
| supervisor | ||
| tools | ||
| .gitignore | ||
| Makefile | ||
| README.md | ||
| alloca.h | ||
| background.c | ||
| background.h | ||
| fatfs_port.c | ||
| mpconfigport.h | ||
| mpconfigport.mk | ||
| mphalport.c | ||
| mphalport.h | ||
| qstrdefsport.h | ||
README.md
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.
Board features:
- 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 Audio and Multicore.
Refer to developer.sony.com/develop/spresense/ for further information about this board.
Prerequisites
Linux
Add user to dialout group:
$ sudo usermod -a -G dialout <user-name>
Windows
Download and install USB serial driver
macOS
Download and install USB serial driver
Build instructions
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
USB connection
Connect the Spresense main board to the PC via the USB cable.
Flash the bootloader
The correct bootloader is required for the Spresense board to function.
Bootloader information:
-
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 v2-3-000
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
Connect the 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