使用MSP430F5529实现超声波测距的时候中断死循环如何解决？

如题，在Init_cap函数过后会直接进入中断且TBIV的值一直是12

测距模块输入是P3.5+P3.6

#include <msp430f5529.h>
#include "cap.h"
#include "delay.h"


#define FILTER_NUM 2

unsigned char choice=0;
//char table[30];
unsigned long channel[2];//存放时间
unsigned long channel_count[4]={0};//存放计数值
unsigned char channel_flag[2]={0};
unsigned char yichu_flag=0;//溢出标志
float distance[3];
float distance_temp1;
float distance_temp2;
float ArrDataBuffer[2][FILTER_NUM];//行表示3个通道，列表示需要滤波的次数
/************************************/
#define Trig_H_1  P3OUT|=BIT7//端口P3.7输出高电平
#define Trig_L_1  P3OUT&=~BIT7//端口P3.7输出低电平

#define Trig_H_2  P8OUT|=BIT2//端口P8.2输出高电平
#define Trig_L_2  P8OUT&=~BIT2//端口P8.2输出低电平


/**************变量定义****************/
unsigned char flag=1;
long time;
/****************************************/
void XT1_init(void)
{P5SEL |= BIT4+BIT5; //配置为XT1功能,电路板上晶振接于这两脚UCSCTL6 |= XCAP_3; //配置电容为12pFUCSCTL6 &= ~XT1OFF; //使能XT1while(SFRIFG1&OFIFG)//如果有时钟错误{UCSCTL7&=~(XT2OFFG+DCOFFG+XT1LFOFFG);//清除3种时钟错误标志SFRIFG1&=~OFIFG;//清除时钟错误标志位}UCSCTL4&=UCSCTL4&~(SELS_7+SELM_7) + SELS_0 + SELM_0;//将SMCLK和MCLK时钟源配置为XT1
}

/*******************************************
函数名称：void init_dvice(void)
函数功能：超声波模块初始化
入口参数：无
返回值：无
*******************************************/
void Init_cap(void)
{P3DIR|=BIT7;//输出方向（用来产生大于10us的脉冲）P8DIR|=BIT2;Trig_L_1;Trig_L_2;P3DIR&=~(BIT5+BIT6);//P3.5-3.6的管脚为输入P3SEL|=(BIT5+BIT6);//CCI0B输入TB0CTL=TBSSEL_2+TBCLR+ID_3+MC_2;//MCLK,清除TAR,八分频,连续计数模式//工作在捕捉模式,捕获/比较中断使能TB0CCTL5 |= CM_1 + SCS + CAP + CCIE + CCIS_1;//捕获模式,同步捕获,中断打开,上降沿捕获TB0CCTL6 |= CM_1 + SCS + CAP + CCIE + CCIS_1;//捕获模式,同步捕获,中断打开,上降沿捕获_EINT();//使能GIE(总中断)
 }
/*******************************************
函数名称：void start(void)
函数功能：超声波开始信号,产生10us的脉冲
入口参数：无
返回值：无
*******************************************/
void start_1(void)
{Trig_L_1;delay_us(20);Trig_H_1;delay_us(20);Trig_L_1;
}
void start_2(void)
{Trig_L_2;delay_us(20);Trig_H_2;delay_us(20);Trig_L_2;
}

/*******************************************
函数名称：void count_distance(void)
函数功能：计算距离
入口参数：无
返回值：无
*******************************************/
float count_distance( unsigned long ti1)
{float dista;dista = ti1*0.000173;return dista;
}

void ULTRASONIC(void)
{if(choice==0)start_1();//if(channel_flag[0]==1)//通道1捕获完成{channel_flag[0]=0;if(channel_count[1]>channel_count[0])channel[0]=channel_count[1]-channel_count[0];else{channel[0]=65535-channel_count[0]+channel_count[1];yichu_flag=0;}distance_temp1=count_distance(channel[0]);}if(choice==1)start_2();if(channel_flag[1]==1)//通道2捕获完成{channel_flag[1]=0;if(channel_count[3]>channel_count[2])channel[1]=channel_count[3]-channel_count[2];else{channel[1]=65535-channel_count[2]+channel_count[3];yichu_flag=0;}distance_temp2=count_distance(channel[1]);}delay_ms(1);choice++;if(choice>=2)choice=0;
}

void MiddleValueFilter(void)
{unsigned char i,j,k;float temp;unsigned char channel_num;for(i=0;i<FILTER_NUM;i++)//一次采集N个数据放入数组中{ULTRASONIC();ArrDataBuffer[0][i] = distance_temp1;ArrDataBuffer[1][i] = distance_temp2;}for(channel_num=0;channel_num<2;channel_num++){for(j=0;j<FILTER_NUM-1;j++)//采样值由小到大排列{for(k=0;k<FILTER_NUM-j-1;k++){if(ArrDataBuffer[channel_num][k]>ArrDataBuffer[channel_num][k+1]){temp=ArrDataBuffer[channel_num][k];ArrDataBuffer[channel_num][k]=ArrDataBuffer[channel_num][k+1];ArrDataBuffer[channel_num][k+1]=temp;}}}distance[channel_num] = ArrDataBuffer[channel_num][(FILTER_NUM-1)/2];//取中间值}
}

#pragma vector = TIMERB1_VECTOR 
__interrupt void timera1_vec() 
{switch(TBIV){case 10:if(TBCCTL5 & CM_1)//上升沿{TBCCTL5 = (TBCCTL5 & (~CM_1) | CM_2);//改成下降沿channel_count[0]=TBCCR5;TBCCTL5 &= ~CCIFG;//清除中断标志}else //下降沿{TBCCTL5 = (TBCCTL5 &(~CM_2) | CM_1);//改成上升沿channel_count[1]=TBCCR5;channel_flag[0]=1;TBCCTL5 &= ~CCIFG;//清除中断标志}break;case 12:if(TBCCTL6 & CM_1)//上升沿{TBCCTL6 = (TBCCTL6 & (~CM_1) | CM_2);//改成下降沿channel_count[2]=TBCCR6;TBCCTL6 &= ~CCIFG;//清除中断标志}else //下降沿{TBCCTL6 = (TBCCTL6 &(~CM_2) | CM_1);//改成下降沿channel_count[3]=TBCCR6;channel_flag[1]=1;TBCCTL6 &= ~CCIFG;//清除中断标志}break;case 14:	yichu_flag++;break;default:	break;}
}

Andy He：

你好, 请问是程序一直处于出中断后马上又进中断的循环吗?

请再查看下你的程序中:

#pragma vector = TIMERB1_VECTOR__interrupt void timera1_vec()

Timera1 是否要修改为 Timerb1?

Regards,

Andy