irq.c

ADI公司的关于光通讯模块的监控程序,在KEIL FOR ARM 的编译环境编译.程序大小约12K,芯片是ADu7020.

// irq.c

/********************************************************************/
/*                                                                  */
/*      IRQ Interrupt Service Rountine                              */
/*                                                                  */
/********************************************************************/
#include <ADuC7020.h>
#include "common.h"

void IRQ_Handler(void) __irq {
    static HALFWORD er_count=0;

    /********************************************************************/
    /*                                                                  */
    /*      Monitor and Diagnostic routine                              */
    /*              triggered by Timer1 underflow                       */
    /********************************************************************/

    if((IRQSTA & GP_TIMER_BIT))            // Timer1 IRQ?
    {

        T1CON = 0x00;

        if((i2c_receive != 0x00) && (i2c_first == TRUE)) {
            FlashUpdate(i2c_receive);
            i2c_receive = 0x00;
        }

            // update DACs
        if(dac_update == 0x01) SetDac(0);
        if(dac_update == 0x02) SetDac(1);
        
        monitor();                          // run monitor routines
        diag();                             // run diagnostic routnies
        fault_recovery_check();             // check recovery status
        
        if(ER_CON)ErCalibration(ER_CON);    // run ER caliburation
        if((er_count>=ER_COMP_TIME) && ER_COMP_ENABLE){
            ErCompensation();               // run ER compensation
            er_count=0;                     // reset counter
        }

        A2h[110] &= 0xFE;                   // clear bit0, DATA_READY_BAR in Status/Control Bits
        er_count++;        
        
        T1CLRI = 0;                         // clear Timer1 interrupt
        T1CON = 0xCF;
    }
    

    /********************************************************************/
    /*                                                                  */
    /*      Tx Laser Fault detection                                    */
    /*              triggered by External IRQ0                          */
    /********************************************************************/
    if ((IRQSTA & XIRQ0_BIT) == 0x00008000)     // XIRQ0, bit15
    {	
        // set bit in status/control bits resister
        A2h[110] |= 0x04;                       // bit2(Tx Fault state) is set high

        IRQCLR = 0x00008000;                    // disable XIRQ0 interrupt 
    }

    /********************************************************************/
    /*                                                                  */
    /*      Tx Disable detection                                        */
    /*              triggered by External IRQ1                          */
    /********************************************************************/
    if ((IRQSTA & XIRQ1_BIT) == 0x00040000)     // XIRQ1, bit14
    {
        // set bit in status/control bits resister
        A2h[110] |= 0x80;                       // bit7(Tx Disable state) is set high

        IRQCLR = 0x00040000;                    // disable XIRQ1 interrupt
    }

    /********************************************************************/
    /*                                                                  */
    /*      Rx LOS detection                                            */
    /*              triggered by PLA IRQ0                               */
    /********************************************************************/
/*
    if ((IRQSTA & PLA_IRQ0_BIT) == 0x00080000)  // PLAIRQ0, bit19
    {
        // set bit in status/control bits resister
        A2h[110] |= 0x02;                       // bit1(LOS) is set high

        IRQCLR = 0x00080000;                    // disable PLAIRQ0 interrupt
    }
*/
    /********************************************************************/
    /*                                                                  */
    /*      Rx Rate Select detection                                    */
    /*              triggered by PLA IRQ1                               */
    /********************************************************************/
    
/*
    if ((IRQSTA & PLA_IRQ1_BIT) == 0x00100000)  // PLAIRQ1
    {
        // set bit in status/control bits resister
        A2h[110] |= 0x10;                       // bit4(RateSel) is set high

        IRQCLR = 0x00100000;                    // disable PLAIRQ0 interrupt
    }

*/

}