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add pinetab docs

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Kevin Hester 2020-10-29 13:26:14 +08:00
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docs/hardware/pinetab/PineTab LoRa schematic.pdf Normal file
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docs/software/pinetab.md
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These are **preliminary** notes on support for Meshtastic in the Pinetab.
A RF95 is connected via a CS341 USB-SPI chip.
A RF95 is connected via a CH341 USB-SPI chip.
Pin assignments:
CS0 from RF95 goes to CS0 on CS341
DIO0 from RF95 goes to INT on CS341
RST from RF95 goes to RST on CS341
CS0 from RF95 goes to CS0 on CH341
DIO0 from RF95 goes to INT on CH341
RST from RF95 goes to RST on CH341
This linux driver claims to provide USB-SPI support: https://github.com/gschorcht/spi-ch341-usb
Notes here on using that driver: https://www.linuxquestions.org/questions/linux-hardware-18/ch341-usb-to-spi-adaptor-driver-doesn%27t-work-4175622736/