MPC5604B CAN RX Interrupt

[joyoungdae]

I dont know why dont occur RX Can interrupt

please review the code

(configuration function)

void InitCAN_0 (void) 
{
    uint8_t   i;

    CAN_0.MCR.R = 0x5000003F;       /* Put in Freeze Mode & enable all 64 msg bufs */
    CAN_0.CR.R = 0x01490082;        /* Configure for 8MHz OSC, 500KHz bit time */
    for (i=0; i<64; i++)
    {
        CAN_0.BUF[i].CS.B.CODE = 0; /* Inactivate all message buffers */
    }
    CAN_0.BUF[8].CS.B.CODE = 8;     /* Message Buffer 0 set to TX INACTIVE */
CAN_0.BUF[9].CS.B.CODE = 8;     /* Message Buffer 0 set to TX INACTIVE */

CAN_0.BUF[0].CS.B.IDE = 0;      /* MB 4 will look for a standard ID */
    CAN_0.BUF[0].ID.B.STD_ID = 0x154; /* MB 4 will look for ID = 555 */
CAN_0.BUF[0].CS.B.CODE = 4;     /* Message Buffer 0 set to RX INACTIVE */
CAN_0.RXGMASK.R = 0x1FFFFFFF;   /* Global acceptance mask */
    SIU.PCR[16].R = 0x0624;         /* MPC56xxB: Config port B0 as CAN0TX, open drain */
    SIU.PCR[17].R = 0x0100;         /* MPC56xxB: Configure port B1 as CAN0RX */
    CAN_0.MCR.R = 0x0000003F;       /* Negate FlexCAN 0 halt state for 64 MB */
/* CAN_0.IMRL.B.BUF01M = 1; */
CAN_0.IMRL.B.BUF00M = 1;
    INTC.PSR[68].R = 0x04;
}

(TX Function)

    CAN_0.BUF[8].CS.B.IDE = 0;      /* Use standard ID length */
    CAN_0.BUF[8].ID.B.STD_ID = 0x148; /* Transmit ID is 0x148 */

    CAN_0.BUF[8].CS.B.RTR = 0;      /* Data frame, not remote Tx request frame */
    CAN_0.BUF[8].CS.B.LENGTH = 8 ; /* # bytes to transmit w/o null */

    for (i=0; i<sizeof(TxData); i++)
    {
        CAN_0.BUF[8].DATA.B[i] = TxData[i]; /* Data to be transmitted */
    }

(RX Function)

while (CAN_0.IFRL.B.BUF00I == 0){};

    gRxCODE = CAN_0.BUF[0].CS.B.CODE;    /* Read CODE, ID, LENGTH, DATA, TIMESTAMP */

    gRxID = CAN_0.BUF[0].ID.B.STD_ID;

    gRxLENGTH = CAN_0.BUF[0].CS.B.LENGTH;

    for (j=0; j<gRxLENGTH; j++)

    {

        gRxDATA[j] = CAN_0.BUF[0].DATA.B[j];

    }

    gRxTIMESTAMP = CAN_0.BUF[0].CS.B.TIMESTAMP;

    dummy = CAN_0.TIMER.R;                /* Read TIMER to unlock message buffers */   

    CAN_0.IFRL.R = 0x00000001;            /* Clear CAN 0 MB 1flag */

interrupt means is vector table

#pragma section data_type ".intc_sw_isr_vector_table" ".intc_sw_isr_vector_table" data_mode=far_abs 

  uint32_t IntcIsrVectorTable[] = {    

(uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, /* ISRs 00 - 04 */

(uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, /* ISRs 05 - 09 */

(uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, /* ISRs 10 - 14 */

(uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, /* ISRs 15 - 19 */

(uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, /* ISRs 20 - 24 */

(uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, /* ISRs 25 - 29 */

(uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, /* ISRs 30 - 34 */

(uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, /* ISRs 35 - 39 */

(uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, /* ISRs 40 - 44 */

(uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, /* ISRs 45 - 49 */

(uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, /* ISRs 50 - 54 */

(uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, /* ISRs 55 - 59 */

/* Use the next line for MPC551x or MPC563x: */

/* (uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy,*/ /* ISRs 60 - 64 */

/* Use the next line for MPC56xB, MPC56xxP, MPC56xS, where PIT1 vector number is 60: */

(uint32_t)&Pit1ISR, (uint32_t)&Dummy, (uint32_t)&ADCECHISR, (uint32_t)&Dummy, (uint32_t)&Dummy, /* ISRs 60 - 64 */

(uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&CanISR1, (uint32_t)&Dummy, /* ISRs 65 - 69 */

(uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, (uint32_t)&Dummy, /* ISRs 70 - 74 */

(interrupt service routine function)

void CanISR1 (void)

{

    RecieveMsg();

}

[PetrS]

Hi,

Please check following…

1. You set receive ID as 0x154, but transmit ID 0x148. As RXGMASK.R = 0x1FFFFFFF the received ID must be equal so message can be stored into MB0.
2. if the FlexCAN is not connected to other node, test the behavior with loopback mode first.
3. Check if the MB flag is set (IFRL[BUF00I]). If yes, INTC is not properly initialized.

BR, Petr