CAN reciever interrupt flage problem

[kdn]

I am using CAN module of MC9S12XHZ512 microcontroller, I successfully archive transmitting of data from my microcontroller, but problem is that I am able to receive data only one time after that my controller get hang, I think that I have not clear my CAN receiver  interrupt flag, can anyone tell me where I can get CAN receiver interrupt flag in datasheet, I post my interrupt code for CAN below. Do MC9S12XHZ512 compiler support sprintf function.

#pragma CODE_SEG __NEAR_SEG NON_BANKED

interrupt void Vcan1RxISR(void)

{

     unsigned char  RxBuffer[8],u8Length=8;

    unsigned int R,temp;

    LCD_Cmd(0x80);

     R = CAN1RXDSR0;

         Convert(R);

         LCD_Data(D);

         delay();

         LCD_Data(C);

         delay();

         LCD_Data(B);

         delay();;

         LCD_Data(A);

         delay();

      PORTA = 0xFF;

      CAN1RFLG_RXF = 1;

}

[iggi]

The flag should be cleared as following, for example:

CANTFLG = 0x01;  //Clear the TXE flag in the CTFLG register to indicate this buffer is full

/* The following is another method to clear the TXE flag to indicate this buffer is full in assembly language.

Notice that the LDA and STA instructions are used. DO NOT USE THE BSET Instructions.

#asm

LDAA #0x01;

STAA $0x106;

#endasm

*/

Here is the link to an appnote Scalable Controller Area Network (MSCAN) Interrupts which is a bit old, but still usefull for your purpose.

Regards,

iggi

[kdn]

volatile unsigned int

volatile  means ?

[lama]

Hi,

http://www.barrgroup.com/Embedded-Systems/How-To/C-Volatile-Keyword

Best regards,

Ladislav

[kdn]

I am getting this error

[kdn]

This code is not working for input capture mode 

#pragma CODE_SEG __NEAR_SEG NON_BANKED

interrupt void  IC0_ISR(void)

{  

  //  new_capture = TC0;   //save the value of input capture register

    LCD_Cmd(0x80);

              PORTA = 0xFF;

         t[i]=TC0;

          i++;

          if(i==2) {

          i=0;

       //    6.0742270546073012209196379760675e-8

         time_interval=(t[1]-t[0]);

         time_period=(float)(0.0000256* time_interval);

         frequency= 1/time_period;

         sprintf(buffer,"%f",frequency);

         for(j=0;j<4;j++)

         {

         LCD_Data(buffer[j]);

         }

}

   TFLG1 = 0x01;       //clear interrupt flag 

}

interrupt void  TOI_ISR(void)

{

    TFLG2 = 0x80;       //clear interrupt flag

}

unsigned int TM;

/* User includes (#include below this line is not maintained by Processor Expert) */

void main(void)

{

  /* Write your local variable definition here */

  /*** Processor Expert internal initialization. DON'T REMOVE THIS CODE!!! ***/

  PE_low_level_init();

  /*** End of Processor Expert internal initialization.                    ***/

  /* Write your code here */

        LCDIni();

//   LCD_Cmd(0x01);

   LCD_Cmd(0x80);

   LCD_Data('T');

    PPST_PPST0 = 0;  //set pull-up

    PERT_PERT0 = 1;  //enable pull-up  

   TSCR1 = 0xE7;       //enable timer, stop timer during wait and freeze, disable fast flag clear

   TIOS_IOS0 = 0;      //channel 0 as an input capture

    TCTL4 = 0x01;       //capture on rising edge

    TIE_C0I = 0x01;        //enable interrupt on channel 1  

    TSCR2 = 0x80;       //timer overflow interrupt enable, timer prescaler is 0

  for(;;){}

  /*** Processor Expert end of main routine. DON'T WRITE CODE BELOW!!! ***/

  /*** Processor Expert end of main routine. DON'T MODIFY THIS CODE!!! ***/

} /*** End of main routine. DO NOT MODIFY THIS TEXT!!! ***/

[kdn]

I have written at end of my code

CANTFLG = 0x01;

but way is different

CAN1RFLG_RXF = 1;

I think  CAN1RFLG_RXF  show CAN receiver FIFO is full , I am looking for CAN receiver interrupt flag.

regard

kushal nandanwar