Posted on April 03, 2014 at 08:27
Hello,
i am working with a STM32f103 with the integrated CAN controller and i use the std. periph library.
In the function
CAN_ClearITPendingBit(CAN1, CAN_IT_BOF);
the entire CAN_MSR register will be overwritten but not the ERRI bit.
case CAN_IT_BOF:
/* Clear CAN_MSR_ERRI (rc_w1) */
CANx->MSR = CAN_MSR_ERRI;
/* Note : the corresponding Flag is cleared by hardware depending
of the CAN Bus status*/
CAN_MSR_ERRI is 0x0004;
Inthe reference manual at bit descriction of ERRI of the CAN_MSR register i can read
''This bit is cleared by software''. An in the code documentation of the std. per. lib. is also written
''Clear CAN_MSR_ERRI''.
Is this a bug? Can i use the function CAN_ClearITPendingBit(CAN1, CAN_IT_BOF);
in the BusOff ISR?
Thanks!!
