用超声波测距显示，并且超过一定距离之后报警，触摸按键之后距离重新显示，并且蜂...

370916632 · 发表于 2019-5-10 22:52:52

我想用超声波测距显示，并且超过一定距离之后报警，触摸按键之后距离重新显示，并且蜂鸣器停止，恢复初态

但是现在超过距离之后，触摸可以重新显示距离，但是蜂鸣器关不了。。。哪里错了

#define MAIN_Fosc 11059200L
#include "config.h"
#include "PWM.h"
#include "delay.h"
#include "lcd1602.h"

sbit ECHO=P4^6;
sbit TRIG=P4^7;
sbit beep = P3^7;
sbit KEY=P2^5;
sbit LED_R=P0^7;

#define Distance_MAX 700
uint8 code Cls[] =    {"             "};
uint8 code ASCII[15] =  {'0','1','2','3','4','5','6','7','8','9','.','-','M'};
uint8 code table[] =  {"the distance is:"};

uint16  time=0;
uint32  S=0;
bit    flag =0;
uint8 disbuff[4]    ={ 0,0,0,0,};

void feng()
{
beep=1;
      delay_ms(200);


}


void Conut(void)
{
   time=TH0*256+TL0;
   TH0=0;
   TL0=0;

   S=(time*1.7)/100;
   if((S>=Distance_MAX))
   {
   flag=0;

   DisplayOneChar(0, 1, ASCII[11]);
   DisplayOneChar(1, 1, ASCII[10]);
   DisplayOneChar(2, 1, ASCII[11]);
   DisplayOneChar(3, 1, ASCII[11]);
   DisplayOneChar(4, 1, ASCII[12]);
   }
   else
   {
   disbuff[0]=S%1000/100;
   disbuff[1]=S%1000%100/10;
   disbuff[2]=S%1000%10 %10;
   DisplayOneChar(0, 1, ASCII[disbuff[0]]);
   DisplayOneChar(1, 1, ASCII[10]);
   DisplayOneChar(2, 1, ASCII[disbuff[1]]);
   DisplayOneChar(3, 1, ASCII[disbuff[2]]);
   DisplayOneChar(4, 1, ASCII[12]);
   }
}

void Timer0Init(void)
{
AUXR &= 0x7F;
TMOD &= 0xF8;
TMOD &= 0xF7;
TMOD |= 0x01;
TL0 = 0;
TH0 = 0;
ET0 = 1;
}

void timer0_int (void) interrupt TIMER0_VECTOR
{
  flag=1;
}

void  StartModule(void)
{
TRIG=1;
delay_ms(5);
TRIG=0;
}

void PWM_config(void)
{
PWMx_InitDefine PWMx_InitStructure;

PWMx_InitStructure.PWMx_IO_Select    = PWM2_P37;
PWMx_InitStructure.Start_IO_Level    = 0;
PWMx_InitStructure.PWMx_Interrupt    = DISABLE;
PWMx_InitStructure.FirstEdge_Interrupt  = DISABLE;
PWMx_InitStructure.SecondEdge_Interrupt = DISABLE;
PWMx_InitStructure.FirstEdge          = 64;
PWMx_InitStructure.SecondEdge          = 192;
PWMx_Configuration(PWM2_ID, &PWMx_InitStructure);
P3n_standard(1<<7);

TH2 = (u8)((65536UL - MAIN_Fosc / 500000UL) / 256);
TL2 = (u8)((65536UL - MAIN_Fosc / 500000UL) % 256);
AUXR = 0x14;
PWM_SourceClk_Duty(PwmClk_T2, 256);

PWMCR |= ENPWM;
PWMCR &= ~ECBI;
}

/
int main(void)
{

P0M1 = 0; P0M0 = 0;
P2M1  &= 0xE5; P2M0 &= 0xE5;
P4M1 &= 0x3F; P4M0 &= 0x3F;
delay_ms(100);

  lcd_init();
  DisplayListChar(0, 0, table);

delay_ms(100);
DisplayListChar(0, 1, Cls);

  Timer0Init();
EA=1;

while(1)
{
      StartModule();
      while(!ECHO);
      TR0=1;
      while(ECHO);
      TR0=0;
if(KEY==0)
{
delay_ms(10);
if(KEY==0)
{
      Conut();
      delay_ms(50);
if(S>=100)
{

delay_ms(10);
      if(S>=100)
{
flag=0;
PWM_config();
feng();
while(!KEY);
feng();
beep=0;
Conut();

}
}
}
      }
   delay_ms(80);
}
}

正是河豚 · 发表于 2019-5-11 08:40:36

蜂鸣器是PWM驱动的吧，注意还要把PWM对应的通道关掉才可。

正是河豚 · 发表于 2019-5-11 13:46:32

PWMCR &= ~ENPWM; 使用这个语句关掉蜂鸣器

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用超声波测距显示，并且超过一定距离之后报警，触摸按键之后距离重新显示，并且蜂...

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