程序开始就启动代码



int __low_level_init(void)

{

    unsigned long *jtagPwd = (unsigned long *)JTAG_DIS_PWD1;

    /* Feed the watchdog timer */

    WDTCTL = WDTPW | WDTCNTCL;

    /* Check JTAG password locations and disable JTAG if passwords don't match.

     * Else the JTAG will be enabled in the 64th cycle after reset.

     */

    if ((*jtagPwd != 0x00000000) && (*jtagPwd != 0xFFFFFFFF))

    {
        /* Disable JTAG */

        SYSJTAGDIS = JTAGDISKEY;
    }

    /* Calibration section

     * Check for the BORIFG flag in IFG1. Execute calibration if this was a BORIFG.

     * Else skip calibration

     */
   if (IFG1 & BORIFG)
    {
        // Perform 2's complement checksum on 62 bytes of TLV data 

      unsigned int checksum = 0;

        unsigned char *TLV_address_for_parse = ((unsigned char *)TLV_START);

        unsigned int *TLV_address_for_checksum = ((unsigned int *)TLV_START + 1);
       do
        {
            checksum ^= *TLV_address_for_checksum++;

        } while (TLV_address_for_checksum <= (unsigned int *)TLV_END);

        checksum ^= 0xFFFF;

        checksum++;

        // If check sum is not correct go to LPM4 

       if (*((unsigned int *)TLV_START) != checksum)

        {

            // Enter LPM4 if checksum failed 

            __bis_SR_register(LPM4_bits);

        }

        // Check sum matched, now set calibration values 

        //Calibrate REF 

        REFCAL1 = *(TLV_address_for_parse + TLV_CAL_REFCAL1);

        REFCAL0 = *(TLV_address_for_parse + TLV_CAL_REFCAL0);

 

        // Calibrate DCO 

        CSIRFCAL = *(TLV_address_for_parse + TLV_CAL_CSIRFCAL);

        CSIRTCAL = *(TLV_address_for_parse + TLV_CAL_CSIRTCAL);

        CSERFCAL = *(TLV_address_for_parse + TLV_CAL_CSERFCAL);

        CSERTCAL = *(TLV_address_for_parse + TLV_CAL_CSERTCAL);

 

        // Calibrate SD24 

        SD24TRIM = *(TLV_address_for_parse + TLV_CAL_SD24TRIM);    

        

        // Clear BORIFG 

        IFG1 &= ~(BORIFG);

    }  
    /* Feed the watchdog timer */

    WDTCTL = WDTPW | WDTCNTCL;

    /* Return value:

     *  1 - Perform data segment initialization.

     *  0 - Skip data segment initialization.

     */

    return 1;

}

 

主程序

void main(void)

{

    static int adjustState=0;

    u8 temp;

    _DINT();

    _NOP();

  

    WDTCTL = WDTPW | WDTHOLD;// 关毕内部看门狗

    CSCTL1 = DIVS__4 + DIVM__4;   //   MCLK=SMCLK=4096K

     FCTL2 = FWKEY | FSSEL_1 |FN2 |FN3; // FN1 | FN3 |FN5;  // MCLK/12 for Flash Timing Generator  257k~476K 

//   FCTL2 = FWKEY | FSSEL_1 |FN1 | FN3 |FN5;  // MCLK/42 for Flash Timing Generator  257k~476K    

    WDTCTL=WDT_ARST_1000; 

    

    Init_TimerA0();

    InitTimeA1Pwm();

    InitCfg();    //组态参数的初始化

    Init_ADI();             //AD初始化

    Init_485();             //UART初始化

 

    _EINT();

 

    while(1)

    {

        if(needRset==0)

          WDTCTL=WDT_ARST_1000;

 

        if((needInitAd==1)&&(CommSending()==0))

        {  

            needInitAd=0;

            _DINT();

            Init_ADI();             //AD初始化

            _EINT();

        }

        

        if(GetBeChanged()==YES)

        {  

            DealData(0);  

        }

        

        temp = GetKeyCode();  

        

        if(temp == KEY_SETUP_QQ)

        {

            SetRange(1);

            adjustState = SET_RANGE1;

            

        }

        else if(temp == KEY_SETDOWN_QQ)

        {

            SetRange(0);

            adjustState = SET_RANGE1;

        }  

        else if(temp ==KEY_SETUP)

        {

          if((adjustState == SET_RANGE1)||(adjustState == SET_RANGE2)) 

          {

            SetFineOut(adjustState,-1);

          }

        }

        else if(temp ==KEY_SETDOWN)

        {

          if((adjustState == SET_RANGE1)||(adjustState == SET_RANGE2)) 

          {

            SetFineOut(adjustState,1);

          }

        }

        else if(temp ==KEY_DOUBLE)

        {

          adjustState = SET_RANGE2;

        }

        else if(temp ==KEY_DOUBLE_QQ)

        {

          ResetFine();

          adjustState=0;

        }

        else if(GetNullKey()==1)

        {

          adjustState=0;

        }        

    }

}