Jonas Thörnblad 0a634c76da
ch552: Use the new hardware CTS signals for UART access
- Use CTS signals to let the FPGA and CH552 signal each other that
    it is OK send UART data.
  - Update the CH552 rx and frame handling logic.
  - Fix minor spelling errors and indentation
2025-02-11 13:50:04 +01:00
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