AN1105 datasheet(84/100 Pages) STMICROELECTRONICS

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ST7 pCAN PERIPHERAL DRIVER

{

Clr_SCIF_Bit();

//clears the CANISR TXIF flag, before

reenabling ITs

SetBit(CANICR,SCIE);

/*sets the CANICR TXIE flag, before

reenabling ITs*/

}

else if(wucause==SOFT_WAKEUP)

{

Clr_SCIF_Bit();

//clears the CANISR TXIF flag, before

reenabling ITs

}

return CAN_SLEEP_SUCCESS;

}

return CAN_SLEEP_ERROR;

//default exit

}

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

ROUTINE NAME : CAN_Switch_on

INPUT/OUTPUT : pointer on an init data, order : emission of a dominant pulse by

wake up or not/error status

DESCRIPTION : Puts the CAN node into active state

COMMENTS

: Calls CAN_Init

Possible return value : SWITCH_ON_SUCCES

SWITCH_ON_FAILURE

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

CAN_Switch_Error CAN_Switch_On (Init_Data_Ptr idptr, CAN_Bool wupulse_allowed)

{

if (!ValBit(CANCSR,RUN))

//The can must not be running

{

CAN_Switch_Error error_status;

status_counter=0;

CANPSR=PAGE_1;

Clr_LOCK_Bit();

//Cancels any pending transmission

SetBit(CANBCSR,LOCK);

//Thus the buffer 1 cannot be used for reception

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