[Ovmsdev] debugging CAN bus error flags

[Michael Balzer]

Derek,

error flags are bus (driver) specific, for can2/can3 see
mcp2515::AsynchronousInterruptHandler().

E.g.

errflags=0x22400402 → CANINTF = 0x22, EFLG = 0x40, 0x0402 = reading RX buffer 1, which was overflown from buffer 0


MCP2515 documentation:

CANINTF = 0x22 → Error Interrupt + Receive Buffer 1 Full

EFLG = 0x40 → Receive Buffer 0 Overflow

Regards,
Michael


Am 15.07.20 um 13:15 schrieb Derek Caudwell:
> On my Nissan Leaf I am getting the following error irqs repeating on
> CAN bus 2. The error flags appear to be set in esp32can.cpp but I
> could use some pointers on how to interpret their meaning and hence
> how to handle the interrupts (assuming they are not real errors):
>
> 1970-01-01 13:01:41 NZDT E (89501) can: can2: intr=93510 rxpkt=127559 txpkt=14 errflags=0x23000001 rxerr=0 txerr=0 rxovr=0 txovr=0 txdelay=0 wdgreset=0 errreset=0
> 1970-01-01 13:01:41 NZDT E (89511) can: can2: intr=93511 rxpkt=127564 txpkt=14 errflags=0x23400401 rxerr=0 txerr=0 rxovr=0 txovr=0 txdelay=0 wdgreset=0 errreset=0
> 1970-01-01 13:01:41 NZDT E (89531) can: can2: intr=93525 rxpkt=127592 txpkt=14 errflags=0x22400402 rxerr=0 txerr=0 rxovr=0 txovr=0 txdelay=0 wdgreset=0 errreset=0
>

-- 
Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
Fon 02333 / 833 5735 * Handy 0176 / 206 989 26

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