求帮忙看下这个程序怎么只发生一次中断？

只看该作者 · 2008-5-12 15:33

用JTAG调试，TIMERA1_VECTOR中断只发生一次，就不发生了，问题出来哪里？

#include  <msp430x20x2.h>
#include "VLO_Library.h"
#include "intrinsics.h"

unsigned int dco_delta;
unsigned long F_VLOCLK;
unsigned int TACCR0_INIT;

int main(void)
{
  WDTCTL = WDTPW +WDTHOLD;                  // Stop Watchdog Timer
  P1DIR |= 0x11;                            // P1.0,1,4 outputs
  P1SEL |= 0x10;                            // P1.4 = SMCLK

  BCSCTL3 |= LFXT1S_2;                      // ACLK = VLO
  BCSCTL1 = CALBC1_8MHZ;                    // 8MHz cal value
  DCOCTL = CALDCO_8MHZ;                     // 8MHz cal value

  __delay_cycles(100);
  dco_delta = TI_measureVLO();              // dco delta = number of
                                            // 1MHz cycles in 8 ACLK cycles
  F_VLOCLK=8000000UL / dco_delta;            //VLO时钟频率
  TACCR0_INIT=F_VLOCLK/100-1;

  //TACCTL0 = CCIE;
  TACCR0 = TACCR0_INIT;
  TACTL = TASSEL_1 + MC_1  + TAIE;    //ACLK作为时钟源，不分频，开TIMERA1中断
  P1OUT = 0x01;
  __enable_interrupt();

  while(1);
}

#pragma vector=TIMERA1_VECTOR
__interrupt void Timer_A(void)
{
if(TAIV==10)
{
  P1OUT ^= 0x01;                            // 50HZ输出？？

}
}

只看该作者 · 2008-5-14 09:09

请问楼主，"VLO_Library.h"这个头文件怎么用？为什么我的IAR没有办法调用？？

2万 · 2008-5-28 01:51

只看该作者 · 2008-5-28 17:46

Using the VLO Library
The very low oscillator (VLO) is a clock source included in the 2xx family of devices. This library provides a method of measuring the speed of the VLO without using any external components such as a 32-kHz crystal. Once measured, the VLO can be used to trigger periodic interrupts with greater accuracy. Measuring the VLO also allows for setting the DCO to a specific frequency using a software FLL.

http://focus.ti.com/general/docs/techdocsabstract.tsp?abstractName=slaa340

2万 · 2008-5-28 22:26

求帮忙看下这个程序怎么只发生一次中断？

相关帖子

"VLO_Library.h"怎么用

楼主搞的什么好玩意???

VLO库

原来TI_measureVLO()是汇编的