Events of the CAN Controller

These event procedures are called when the CAN controller's state or one of it’s error counters (errorCountRX, errorCountTX) changes. You would use this procedure to monitor the error counters (e.g. output of a warning) or to end the measurement or simulation.

Within these procedures the error counters of the CAN controller are made available by the this variable. They are accessed with the following syntax:

• this.errorCountRX (Receive error counter)
• this.errorCountTX (Transmit error counter)
• this.can (Assign the channel)

Note

Error counters are supported and thus changed by the complete XL family.

Example

on errorPassive procedure

on errorPassive {
   ...
   write("CAN Controller is in errorPassive state")
   write(" errorCountTX = %d", this.errorCountTX);
   write(" errorCountRX = %d", this.errorCountRX);
};

on busOff procedure

on busOff
{
int errRxCnt;
int errTxCnt;
int channel;
double timestamp; // [seconds]

timestamp = (double)timeNow() / (double)100000;
channel = this.can;
errRxCnt = this.errorCountRX;
errTxCnt = this.errorCountTX;
Write("Bus Off: time=%f channel=%d, errRxCnt=%d, errTxCnt=%d",
timestamp, channel, errRxCnt, errTxCnt);

resetCanEx(channel);
}