99 lines
2.8 KiB
Markdown
99 lines
2.8 KiB
Markdown
# CXD56 (Spresense) #
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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 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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## Prerequisites ##
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### Linux ###
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Add user to `dialout` group:
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$ sudo usermod -a -G dialout <user-name>
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### Windows ###
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Download and install USB serial driver
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* [CP210x USB to serial driver for Windows 7/8/8.1](https://www.silabs.com/documents/public/software/CP210x_Windows_Drivers.zip)
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* [CP210x USB to serial driver for Windows 10](https://www.silabs.com/documents/public/software/CP210x_Universal_Windows_Driver.zip)
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### macOS ###
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Download and install USB serial driver
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* [CP210x USB to serial driver for Mac OS X](https://www.silabs.com/documents/public/software/Mac_OSX_VCP_Driver.zip)
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## Build instructions ##
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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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Change directory to cxd56:
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$ cd ports/cxd56
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To build circuitpython image run:
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$ make BOARD=spresense
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## USB connection ##
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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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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: [Spresense firmware v3-0-0](https://developer.sony.com/file/download/download-spresense-firmware-v3-0-0)
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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 BOARD=spresense flash-bootloader
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## Flash the circuitpython image ##
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To flash the firmware run the command:
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$ make BOARD=spresense flash
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## Accessing the board ##
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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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