AN1105 datasheet(66/100 Pages) STMICROELECTRONICS

66 / 100 page

66/100

ST7 pCAN PERIPHERAL DRIVER

SetBit(CANCSR,SRTE);

#endif /*SIMULTANEOUS_EMISSION_RECEPTION*/

if (run_set)

{

CAN_RUN_Cell();

}

return CAN_INIT_SUCCESS;

}

else {

return CAN_INIT_FAILURE;

}

/*--------------------------------------------------------------------------

ROUTINE NAME : CAN_In_Queue

INPUT/OUTPUT : pointer on a CAN buffer

output error code

DESCRIPTION : Put a message given by the application into the transmission queue

Updates the queue parameters

COMMENTS

: Called by CAN_Transmit_Request

Must not be interrupted

Possible return values : CAN_FIFO_FULL

CAN_TRANSMIT_SUCCESS

CAN_TRANSMIT_FATAL

--------------------------------------------------------------------------*/

static CAN_Transmit_Error CAN_In_Queue (CAN_Buffer* msg_to_queue)

{

if (CAN_transmit_queue.isinuse)

//Necessary to avoid multiple simultaneous

access

{

return CAN_TRANSMIT_FATAL;

//Time out ?

}

//to the datas

CAN_transmit_queue.isinuse=CTRUE;

//Locks the queue

if ((CAN_transmit_queue.fifo_size)>=MAX_FIFO_SIZE)

//Tests if the FIFO is

already full

{

CAN_transmit_queue.isinuse=CFALSE;

//If yes, releases the queue

return CAN_FIFO_FULL;

//...and aborts process

AN1105 Datasheet(PDF) 66 Page - STMicroelectronics

AN1105 Datasheet(HTML) 66 Page - STMicroelectronics

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