求助大神，F5438A捕获调了一天都没出结果
代码如下显示结果不对，而且数字会慢慢掉；/*
* main.c
*/
#include "msp430x54x.h"
# include "info.h"
unsigned long int countnumber=0;
unsigned long int add=0;
uint capture_array; //存放捕获时计数器的值
uint count1=0,buf;
float Freq=0.0;
uint buffer;
char data1;
void floatTochar(float datain,char dataout[],int Num);
void Bubble_Sort(int dat[],int Num);
int M_Filter(int dat[],int Num);
void main(void)
{
//UCS_XT1_DCO_DCO(8);
WDTCTL = WDTPW + WDTHOLD;
P1SEL|=BIT1; //使用P1.1，也就是子系统入口
TA0CCTL0 = CM_2 + CCIS_0 + SCS + CAP + CCIE; //OFFFF,计数来源是CCIS0,同步计数，捕获模式，中断允许
TA0CTL = TASSEL_2 +MC_2 + TACLR; //SM,递增模式，清零
Lcd_Init(); //液晶显示初始化
Lcd_Clear();
__bis_SR_register(GIE); //中断允许
while(1);
}
#pragma vector=TIMER0_A0_VECTOR
__interrupt void TIMER0_ISR(void)
{
uint i;
capture_array = TA0R;//存计数器的值到数组capture_array
if (count1 == 5)
{
count1 = 0;
for(i=0;i<4;i++)
{ if(capture_array>capture_array)
{ add= (capture_array-capture_array)+add;}
else{ add= (capture_array+(65535-capture_array))+add;}
}
float k;
k=add/4.0;
Freq=1000000.0/k;
floatTochar(Freq,data1,1);
Lcd_Clear();
StrDisplay("P2.1:",0,0,0);
StrDisplay(data1,2,2,0);
_Nop();_Nop();
}
}
页:
[1]