Why disable/enable CAN interrupt will make not working abnormally

kimchan_eb — Mon, 20 Aug 2018 11:21:45 GMT

Hi,

I have a CAN stack project integrated with CanNM.(S12G128 with Trace32 debugger)

And I add CAN DisInterrupt/EnInterrupt in exclusive area like this:

FUNC(void, RTE_CODE) SchM_Enter_CanNm_SCHM_CANNM_EXCLUSIVE_AREA_0 (void)

{

/* disable */

CAN_RIER = 0U;

CAN_TIER = 0U;

} /* FUNC(void, RTE_CODE) SchM_Enter_Nm_SCHM_NM_EXCLUSIVE_AREA_0 (void) */

FUNC(void, RTE_CODE) SchM_Exit_CanNm_SCHM_CANNM_EXCLUSIVE_AREA_0 (void)

{

/* enable */

#if (CAN_RX_MODE == CAN_INTERRUPT_MODE)

/* The CAN interrupts defines have been specified to correspond with */

/* the CANRIER and CANTIER registers */

/* CANRIER : 7 : WAKE-UP */

/* 6 : CAN status change */

/* 5..4 : Rx status change */

/* 3..2 : Tx status change */

/* 1 : Overrun */

/* 0 : RxOK */

/* CANTIER : 7..3 : unused */

/* 2 : TxOK mailbox 2 */

/* 1 : TxOK mailbox 1 */

/* 0 : TxOK mailbox 0 */

CAN_RIER |= CAN_RIER_RXFIE;

/* TxOK interrupts are enabled before each frame transmission. */

/* They must be disabled if any frame transmission is in progress */

/* to prevent from a TxOK interrupt which is not due to a frame transmission */

CAN_TIER = 0U;

#endif

/* Generate CSCIF interrupt in Bus-off state both in interrupt and polling mode */

CAN_RIER |= CAN_RIER_TSTATE_BOF;

#if (CAN_ERROR_STATUS_MODE == CAN_INTERRUPT_MODE)

/* Generate an error interrupt request when CSCIF bit is set */

CAN_RIER |= CAN_RIER_CSCIE;

#endif

} /* FUNC(void, RTE_CODE) SchM_Exit_Nm_SCHM_NM_EXCLUSIVE_AREA_0 (void) */

But when I run this program, it will not working normally.

It should send period frames but only send several times and stop sending.

Program is still running, not fleeting.

I referred to S12XHY128 and S12G192, but I didn't find breakpoint.

Does anyone have suggestions about this?

Br,

Kim

topic Why disable/enable CAN interrupt will make not working abnormally in S12 / MagniV Microcontrollers