Jacdac v0

[jamesadevine]

This will be the PR for all v0 related jacdac commits (will close previous PRs and consolidate).

[jamesadevine]

• [X] Control Packet refactor
  • [X] devices should broadcast their drivers every 500 ms
  • [X] as before, control packets should be routed by the logic driver to correct drivers
• [X] Dynamic packet sizes
  • [X] device should receive a JDPkt header which will contain the size and the checksum
  • [X] device should then prepare to receive the remainder of the packet
• [X] Dynamic baud rate
  • [X] the pulse should dictate the baud rate for communication 10 us is 1mbaud. (i.e. 10 bits at whatever baud)
  • [X] a device should reconfigure the baud rate upon receiving the pulse and prepare to receive the packet
  • [ ] ❌ control packets should be sent at the lowest baud rate on the bus. This point is no longer going to be implemented, those that can't communicate at the baud will not see other devices. Other devices will have to change their addresses if a collision occurs.
  • [x] Represent the communication rate in JDDriver
• [x] Error detection and recovery
  • [x] JACDAC should have a dedicated timer for detecting error conditions
  • [x] As before, UART errors (BREAK, PARITY) are not permissible in JACDAC
  • [x] Packet timeouts should be tighter as specified on JACDAC.org
  • [x] maximum interbyte gap should be enforced.
  • [x] minimum interframe gap should be enforced.
  • [x] maximum gap between the lo pulse and data should be enforced.
  • [x] minimum gap before lo pulse and data
  • [x] timer should check if the line has gone high (although GPIO should do, there is a race)
  • [x] difference between lo pulse and transmitting baud rate should not be tolerated.
• [X] JACDAC version number in control packets
• [x] Fast gpio interrupts
• [ ] Testing:
  • [ ] Define and write physical layer tests
  • [ ] Define and write Link layer tests
  • [ ] Define and write logic layer tests
  • [ ] Regression test SAMD21 / 51 and make it work again
  • [ ] Regression test NRF52 and make it work again
• [ ] Mass rename, revise terminology
• [ ] JACDAC NACK (for bus level NACKING)

[jamesadevine]

Overall this PR is terrible, have another go puny human 😈

[jamesadevine]

maximum interbyte gap should be enforced.

Interbyte gap is now defined as 2 bytes at the minimum baud (125k): 160us

minimum interframe gap should be enforced.

Interframe gap is now defined as 2 bytes at the minimum baud (125k): 160us

maximum gap between the lo pulse and data should be enforced.

Maximum InterLoData gap is now defined as 2 bytes at the minimum baud (125k): 160us

minimum gap before lo pulse and data

Minimum InterLoData gap is now defined as 2 bytes at the transmitting baud rate (125k):

• 20 us at 1mbaud
• 40 us at 500kbaud
• 80 us at 250kbaud
• 160 us at 125kbaud

[jamesadevine]

• [X] STM32 physical layer tests working at various baud rates and packet lengths.

[jamesadevine]

• [x] EUI 64
• [x] 8-bit address conflicts