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https://github.com/meshtastic/meshtastic.git
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39 lines
1.7 KiB
Markdown
39 lines
1.7 KiB
Markdown
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---
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id: pinetab
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title: Pinetab
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sidebar_label: Pinetab
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---
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These are **preliminary** notes on support for Meshtastic in the Pinetab.
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A RF95 is connected via a CH341 USB-SPI chip.
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Pin assignments:
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CS0 from RF95 goes to CS0 on CH341
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DIO0 from RF95 goes to INT on CH341
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RST from RF95 goes to RST on CH341
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This linux driver claims to provide USB-SPI support: https://github.com/gschorcht/spi-ch341-usb
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Notes here on using that driver: https://www.linuxquestions.org/questions/linux-hardware-18/ch341-usb-to-spi-adaptor-driver-doesn%27t-work-4175622736/
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Or if **absolutely** necessary could bitbang: https://www.cnx-software.com/2018/02/16/wch-ch341-usb-to-serial-chip-gets-linux-driver-to-control-gpios-over-usb/
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## Portduino tasks
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- How to access spi devices via ioctl (spidev): https://www.raspberrypi.org/documentation/hardware/raspberrypi/spi/README.md#:~:text=Troubleshooting-,Overview,bus)%2C%20UARTs%2C%20etc.
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- access gpio via libgpiod?
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- Use dkms to distribute driver?
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- echo 100 > /sys/module/spi_ch341_usb/parameters/poll_period
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## Task list
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- Port meshtastic to build (under platformio) for a poxix target. spec: no screen, no gpios, sim network interface, posix threads, posix semaphores & queues, IO to the console only
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Use ARM linux: https://platformio.org/platforms/linux_arm
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And linux native: https://platformio.org/platforms/native
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- Test cs341 driver - just test reading/writing a register and detecting interrupts, confirm can see rf95
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- Make a radiolib spi module that targets the cs341 (and builds on linux)
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- use new radiolib module to hook pinebook lora to meshtastic, confirm mesh discovery works
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- Make a subclass of StreamAPI that works as a posix TCP server
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- Use new TCP endpoint from meshtastic-python
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