AN1105 datasheet(63/100 Pages) STMICROELECTRONICS

63 / 100 page

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ST7 pCAN PERIPHERAL DRIVER

}

else if (current_content == 0)

return (CAN_FILTER_MATCH);

else

{

current_last = current_checked - 1;

if (current_last < current_first)

break;

}

return (CAN_FILTER_NO_MATCH);

}

#endif

/*ifdef FILTERS_ENABLED*/

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

ROUTINE NAME : CAN_Get_IT_Type

INPUT/OUTPUT : -- / generic type of the event that caused the IT

DESCRIPTION : IT type fetching routine

COMMENTS

: Called by CAN_Interrupt

Possible status returned : ITRECEPT for reception IT

ITTRANSMIT for transmission IT

ITERR for error IT

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

static IT_Type CAN_Get_IT_Type(void)

{

#ifdef DEBUG

/*In this case, priority is given to error detection*/

if ((ERROR_MASK & CANISR)!=0)

{

return ITERR;

}

else if ((SCIF_MASK & CANISR)!=0)

{

return ITSCIF;

}

#endif

#ifdef SATUS_CHANGE_NOTIFICATION /*In this case, prioity given to status change,

eg. to early detect bus-off state*/

#ifndef DEBUG

/*If debug is defined, this IT has already been

taken into account*/

AN1105 Datasheet(PDF) 63 Page - STMicroelectronics

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