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@ironsheep ironsheep released this 23 Nov 10:51
· 19 commits to main since this release
v1.0.0
7b658ed

Initial release of P2 Octo Serial port driver

  • Services 1 to 8 ports from single cog running Pasm2
  • Tested initial configuration: 115,200 bps, N81
  • Validated with serial decoding logic analyzer
  • Tested Raspberry Pi <-> P2 - two serial pairs
  • Tested P2 <-> P2 - six more serial pairs

Known Issues

  • WARNING (totally my fault) I accidentally left the logic analysis outputs active in this release! I'm posting a next release without these enabled.
  • We need to characterize this now that it's mostly working
  • We saw one issue with the 2nd serial port connected to a test RPi 4. The second serial port started the first transmission with a leading 0x00 byte. The cause has not been found.
  • When testing P2 <-> P2 with many ports we saw no such issues as is the same with the first of the two serial lines connected to the RPi

FYI- My LA Instrumentation outputs:

  • Pins 8,9,10 are the port address [0-7] being serviced
  • Pin 4 is high while servicing the receive side of a port
  • Pin 5 is high while servicing the transmit side of a port
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