TMS320F28P650DK: How the MCAN recovers from a CAN bus off status

Hi Wang,

 I don't understand how to verify that the bus-off is recovered and then clear CCCR.INIT?

MCAN_getProtocolStatus(MCANA_DRIVER_BASE,&ProtocolStatus);

If ProtocolStatus.lastErrCode has a value of not 0 or 7 to 7.I think the Bus-off has been recovered.

Is that right?

Regarding your FAQ: "Before resetting the CCCR.INIT bit, the application software needs to clear all the pending messages and CAN TX status" - where do I find this requirement in the TMS320F28P55x datasheet?

And where do I find the function CanCancelPendingMsg()? It does not seem to be included in C2000Ware 5.x.

StephanS said:

where do I find the function CanCancelPendingMsg()? It does not seem to be included in C2000Ware 5.x.

Just noticed that the MCAN driver in C2xWare doesn't have this function. You can write "1" to corresponding bit of TXBCR register to cancel the pending TX buffer.

The API name in C2000WARE is MCAN_txBufCancellationReq(..)

int32_t MCAN_txBufCancellationReq(uint32_t baseAddr, uint32_t buffNum)

Okay, thanks!