STM32H743 CANBus TX Timing Hi all, I have what's probably a niche problem but a problem (seemingly) nonetheless. I'm making a CANBus application that I'd like to use DAR (Disable Auto-Retransmit) mode for. I'm running into an issue where, after a certain amount of time while the only node on the bus (so each TX ends in an ACK error), the CAN peripheral will stop handling TX requests made through FDCAN_TXBAR (the last-queued message never goes out the wire) and no further IRQs occur.I'm using just a single TX buffer (no queue or FIFO, just the one buffer). I've been probing the bus using a Saleae logic analyzer, and I've found an interesting thing about the timing of the CAN peripheral. A message will go out, the ACK error will occur near the end, and the peripheral will inject its own error frame (6 dominant or recessive bits in a row (depending on pre- or post-error passive mode activation) followed by 8 error delimiter bits and 3 IFS bits). All of that is expected. However, somewhat unexpectedly, when I toggle
