为什么进入不了中断程序？？？？

2019-07-31 14:21发布

13349 2

#include<msp430g2553.h>
/*
* the OSC is not work, run this function
*/
void FaultRoutine()
{
P1OUT = 0x01; // P1.0 on (red LED)
while(1); // TRAP
}
/*
* initialize Clock Module
* use DCO clock as MCLK and SMCLK
* the frequency of DCO is 1MHZ; MCLK and SMCLK is 1MHZ
*/
void init_CLOCK()
{
if(CALBC1_1MHZ ==0xFF || CALDCO_1MHZ == 0xFF)
{
FaultRoutine(); // If calibration data is erased then run FaultRoutine
}
BCSCTL1=CALBC1_1MHZ; //Set range
DCOCTL=CALDCO_1MHZ; //Set DCO step + modulation
BCSCTL3 |= LFXT1S_0; // LFXT1 =Normal operation
IFG1 &= ~OFIFG; // Clear OSCFault flag
BCSCTL2|=SELM_0+DIVM_0+DIVS_0; //MCLK and SMCLK(use DCO) Divider:1 [internal resistor]
}
/*
* initialize digital IO port
*/
void init_IO()
{
P1DIR&=~BIT3; //set P1DIR is input(Reset with PUC)[P1.3 is input]
P1DIR|=BIT6+BIT0; //set P1.0 and P1.6 are output
P1OUT=0;
}
/*
* initialize Timer A
* SMCLK is 1MHZ
*/
void init_TA()
{
TACTL|=TASSEL_2+ID_0+MC_1+TAIE; //use SMCLK[1M]/up mode/interrupt enable/No interrupt pending
TAR=0;
TACCR0=500; //0.05s
TACCTL0|=CAP+CCIE; //use Compare mode
TACCTL0&=~CCIFG;
}
/*
* main function
*/
void main()
{
WDTCTL=WDTHOLD+WDTPW; //watch dog timer is stopped
init_CLOCK(); //initialize basic clock
init_IO(); //initialize digtal IO port
init_TA();
_EINT();
while(1)
{
// P1OUT|=BIT6;
// _delay_cycles(100000);
// P1OUT&=~BIT6;
// _delay_cycles(100000);
}
}
#pragma vector=TIMER0_A0_VECTOR
__interrupt void Timer_A (void)
{
//P1OUT=0; //close green led
P1OUT|=BIT6; //open red led
_delay_cycles(100000);
//TACCTL0&=~CCIFG; //clear interrupt flag
}