Peter-van-Tol/LiteX-CNC

Support SPI

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Peter-van-Tol commented

Support SPI for RPi4.

This entails:

  • Update configuration, so people can choose which connection the want to make;
  • New SPI-driver. Proposed connection string will be spi:<file-descriptor-path>;
  • New SPI-bridge for the firmware;
Peter-van-Tol commented

Boilerplate added, the new driver can be added with:

loadrt litexcnc connections="spi:/dev/spidev0.0"

With the boilerplate code, this will load the correct driver and opens a connection with the SPI pins of the card. It will fail the communication to the card, because the communication routines have not been implemented yet. For this a card with the SPI-bridge is required....