msp430f5529驱动HC-sr04测距

1楼-- · 2019-07-15 18:32

我也再求有没有分享一下

2楼-- · 2019-07-16 00:30

#include <msp430f5529.h>
#include "HAL_Dogs102x6.h"
#include "stdio.h"
#include "stdlib.h"

void Timer_init();
unsigned int overflow = 0;
unsigned int pwm_start = 0;
unsigned int pwm_end =0;
unsigned long interval =0;
int distance=0;
char buff[25];
int i=0,n=0;
volatile unsigned int a;
volatile unsigned int b;
volatile unsigned int c;
volatile unsigned int d;
volatile unsigned int *f;
void main()
{ WDTCTL=WDTPW+WDTHOLD;

/*****************Set up LCD**********************************/
Dogs102x6_init();                         //初始化LCD
Dogs102x6_backlightInit();                //背光初始化
Dogs102x6_setBacklight(8);          //设置初始背光值
Dogs102x6_setContrast(5);          //设置初始对比度值
Dogs102x6_clearScreen();                   //清屏

Timer_init();
__enable_interrupt();

while(1){

      a=distance/1000+48;//千
f=&a;
Dogs102x6_charDraw(1,54,*f,0);
b=distance%1000/100+48;//百
f=&b;
Dogs102x6_charDraw(1,60,*f,0);
c=distance%1000%100/10+48;
   f=&c;
   Dogs102x6_charDraw(1,66,*f,0);
d=distance%1000%100%10+48;
           f=&d;
           Dogs102x6_charDraw(1,72,*f,0);


}
}

#pragma vector=TIMER2_A0_VECTOR
__interrupt void TAIV_ISR(void)
{
   if(TA2CTL &TAIFG)
   {  overflow=0;
      TA2CTL &= ~TAIFG;
      overflow++;
      P1OUT &=~ BIT2;

   }
   if(TA2CCTL0 & COV)
   {
      TA2CCTL0 &= ~COV;
   //  P1OUT |= BIT3;
   }


   if((TA2CCTL0 & CCI)==0) //按键松开，上升沿触发
{

      P1OUT ^= BIT3;
      TA1CCTL0 &= ~CCIE;
      pwm_end = TA2CCR0;
      interval = (pwm_end-pwm_start);//+ overflow*65535
      distance=interval*0.02125;
      TA2CCR0=0;
      overflow=0;

}

}

void Timer_init()
{
   TA0CTL = TASSEL_1 + ID_1 + MC_1 + TACLR + TAIE;  // ACLK, contmode, clear TAR
   TA0CCR0 = 32767;

P2DIR |= BIT0;
P2OUT &= ~BIT0;
P2REN |= BIT0;
P2OUT |= BIT0;
  // P2SEL |=  BIT3 ;          //p2.3作为捕获CCIxA的输入
P2IES &= ~BIT0;
P2IFG &= ~BIT0;
P2IE |= BIT0;
P2DIR |=  BIT4 ;
P1DIR |=  BIT0+BIT2+BIT3;
P1OUT &= ~BIT0;
}

// Timer0_A5 Interrupt Vector (TAIV) handler
#pragma vector=TIMER0_A1_VECTOR
__interrupt void TIMER0_A1_ISR(void)
{
  switch(__even_in_range(TA0IV,14))
  {
case  0: break;                         // No interrupt
case  2: break;                         // CCR1 not used
case  4: break;                         // CCR2 not used
case  6: break;                         // reserved
case  8: break;                         // reserved
case 10: break;                         // reserved
case 12: break;                         // reserved
case 14:
   // n++;
   // if(n==2){
   P2OUT &=~BIT4;
         for(i=10;i>0;i--);
         P2OUT |=BIT4;
         for(i=20;i>0;i--);
         P2OUT &=~BIT4;
   //  }
         break;
default: break;
  }
}

// Port 1 interrupt service routine
#pragma vector=PORT2_VECTOR
__interrupt void Port_1(void)
{if( P2IFG&BIT0==1 )
{ P1OUT^=BIT0;
TA2CTL = TASSEL_2 + ID_0 + MC_2+TACLR;    //定时器取ACLK，无分频，连续计数
TA2CCTL0 = CM_3 + CCIS_0 + SCS + CAP+CCIE;  //上下沿都触发捕捉，用于测脉宽，同步模式,使能中断
P2DIR &=  ~BIT3 ;
   P2SEL |=  BIT3;          //p1.7作为捕获CCIxA的输入
   P2REN |=  BIT3;
   P2OUT |=  BIT3;
   P2IFG &= ~BIT0;
}
}