msp430f5529的超声波测距，一直在lcd上显示0m？求大神指点 -

标题: msp430f5529的超声波测距，一直在lcd上显示0m？求大神指点 [打印本页]

作者: 两个半橙子 时间: 2021-6-9 22:45
标题: msp430f5529的超声波测距，一直在lcd上显示0m？求大神指点
#include <lcd.h>
#include <msp430f5529.h>
#include <string.h>

unsigned char Range[]= " maxD: 50 M ";
unsigned char distance[] = "distance:";
unsigned char ASCII[15] = {'0','1','2','3','4','5','6','7','8','9','.','-','M'};
uint lastCCR1;

unsigned int  t=0;
unsigned long S=0;
unsigned char disbuff[4] = {0,0,0,0};

void delayms(unsigned int m)
      {
         unsigned int i, j;
         for(i=0; i<m; i++)
         for(j=0; j<1000; j++);
      }

void Conut(void)
      {
               S=(t*1.7)/100;    //算出来是CM
               if((S>=700))    //超出测量范围显示“-”
               {
                  DisplayOneChar(10, 1, ASCII[11]);
                  DisplayOneChar(11, 1, ASCII[10]);  //显示点
                  DisplayOneChar(12, 1, ASCII[11]);
                  DisplayOneChar(13, 1, ASCII[11]);
                  DisplayOneChar(14, 1, ASCII[12]);  //显示M
               }
               else
               {
                  disbuff[0]=S%1000/100;
                  disbuff[1]=S%1000%100/10;
                  disbuff[2]=S%1000%100%10;
                  DisplayOneChar(10, 1, ASCII[disbuff[0]]);
                  DisplayOneChar(11, 1, ASCII[10]);  //显示点
                  DisplayOneChar(12, 1, ASCII[disbuff[1]]);
                  DisplayOneChar(13, 1, ASCII[disbuff[2]]);
                  DisplayOneChar(14, 1, ASCII[12]);  //显示M
               }
   }

void  StartModule()                //启动模块
      {
         uint i;
         P6OUT|=BIT0  ;                         //启动一次模块
         __delay_cycles(20);    //20个机器周期，20μs
         P6OUT&=~BIT0 ;
      }

void  Initclock()
   {
      UCSCTL3 = SELREF_2;//FLL参考时钟源REFO
      UCSCTL4 |= SELA_2; //先设置ACLK为REFO
      //测试晶振是否失效，并清除故障失效标志位
      do
      {
         UCSCTL7 &= ~(XT2OFFG + XT1LFOFFG + DCOFFG);
                                       //清除XT2、XT1、DCO故障失效标志位
         SFRIFG1 &= ~OFIFG;          //清除晶振故障失效中断标志位
      }while (SFRIFG1&OFIFG);       //测试晶振故障失效中断标志位

      __bis_SR_register(SCG0);       //关闭FLL
      UCSCTL1 = DCORSEL_5;          //选择DCO的工作频率范围
      UCSCTL2 |= 249;                //（259+1）*32768 = 8Mhz
      __bic_SR_register(SCG0);       //启用FLL
      __delay_cycles(2500000);       //延时，等待DCO工作稳定
      UCSCTL4 |=SELM_3 + SELS_3;    //主时钟、子时钟均配置为dcoclk
      UCSCTL5 |=DIVM_3 + DIVS_3;    //主时钟、子时钟8分频
   }

void  SetTIMEA()
   {
         t=0;
         lastCCR1=0;
         TA0CTL = CM_3+TACLR+TASSEL_2+ID_2+MC_2+TAIE;  //计数清0，选子系统时钟做时钟源，连续计数模式，定时器允许中断

   }

int main(void)
{
WDTCTL = WDTPW | WDTHOLD; // stop watchdog timer
P6DIR|=BIT0;
P1DIR&=~BIT2;
P1SEL|=BIT2;
Initclock();
P6OUT&=~BIT0 ;
InitLcd1602();
SetTIMEA();
TA0CCTL1 |= CAP+CM_1+CCIS_0+SCS+CCIE;//改为上升沿捕获
LcdShowStr(2,0,Range);
LcdShowStr(0,1,distance);
_EINT();
while(1)
{

      StartModule();
      Conut();
      delayms(10);

}
}

#pragma vector = TIMER0_A1_VECTOR    //CCR1捕获产生中断
__interrupt void TIMER0_A1__ISR(void)
{
TA0CCTL1&=~CCIFG;//中断标志清零
switch(__even_in_range(TA0IV,14))
{
case 0:
      break;
case 2:             //CCR1捕获中断
   if(P1IN&BIT2==1)
         {
         lastCCR1 = TA0CCR1;
         TA0CCTL1 = CAP+CM_2+CCIS_0+SCS+CCIE;//改为下降沿捕获
         }
   else
   {
         _DINT();                            //关闭全局中断
         t=TA0CCR1-lastCCR1;
         TA0CCR1 = 0;
         TA0CCTL1= CAP+CM_1+CCIS_0+SCS+CCIE;//改为上升沿捕获
         _EINT();
   }
   break;
case 4:
   break;
case 6:
   break;
case 8:
   break;
case 0x0A:
   break;
case 0x0C:
   break;
case 0x0E:                                     //定时器溢出中断
   if(TA0CCTL1&COV)
      TA0CCTL1&=~COV;
   break;
default:
   break;
}
}

作者: lidalinqing 时间: 2021-7-6 01:00
兄弟你定义的接口是哪里？我怎么看不懂

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