about dominant error

[kevin xu]

Dear Guys

I get the "bit dominant error" when programming for can with STM32F302.

even i set CAN_MODE_SILENT_LOOPBACK mode , also get this error after exec the statement  "SET_BIT(hcan->Instance->sTxMailBox[transmitmailbox].TIR, CAN_TI0R_TXRQ);"

anyone can help me thank you very much

[waclawek.jan]

Observe waveform on the CAN_Tx and CAN_Rx pins, using logic analyzer/oscilloscope.

For the CAN pins, read out the relevant GPIO registers content and check if they are properly set.

JW

[kevin xu]

hi Jan

thank you for you sending messages. I use STM32cubmax to generate code for can settings. actually, I set the  CAN_MODE_SILENT_LOOPBACK mode also same problem. so i think do not need to check the one "CAN_Tx and CAN_Rx pins, using logic analyzer/oscilloscope. is correct? thank you.