AN1105 STMicroelectronics, AN1105 Datasheet - Page 73

• Manufacturer Part Number: AN1105
• Description: ST7 PCAN PERIPHERAL DRIVER
• Manufacturer: STMicroelectronics

new reception
the messsage that successfully passed the filters
!!!
message_ident = (((unsigned int)CANIDHR)<<8)|CANIDLR;
message_ident >>= FILTER_SHIFT;
message_ident &= 0xFFF0;
//Filtering function
#ifdef FILTERS_ENABLED
filtering_status=CAN_Filter(message_ident); //Filtering fonction call
if (filtering_status==CAN_FILTER_NO_MATCH)
#endif
//Tests if remote frame
if(ValBit(CANIDLR,4))
//Else, saves the datas in a buffer passed by the application
soft_buffer_ptr=CAN_Request_Buffer(message_ident); //Requests a buffer for
if (soft_buffer_ptr==NULL)
if (soft_buffer_ptr->buffer_rw)
soft_buffer_ptr->buffer_rw=CTRUE;//Locks the buffer
if (!(soft_buffer_ptr->buffer_free))
return CAN_RECEIVE_REMOTE;
{
Clr_RDY_Bit();
return CAN_FILTERING_FAILURE;
}
{
Clr_RDY_Bit();
CAN_Remote_Reception_Notification(message_ident);
}
{
Clr_RDY_Bit();
return CAN_NO_BUFFER;
}
{
Clr_RDY_Bit();
return CAN_RECEIVE_FATAL;
}
{
/*Conditionnal compilation*/
//Kind of "software overrun"
//The buffer must exist prior to beeing filled
//Appropriate rigth shift
//Frees the hardware buffer for a
ST7 pCAN PERIPHERAL DRIVER
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