今天帮公司写个相对简单的单片机程序

来源：互联网发布：cepii距离数据怎么看编辑：程序博客网时间：2024/04/30 14:55

/* 单片机： PIC12C508/ MDT10P52

功能：按KEY0 冲汽105S，长按2S结束（第一次按无效）。按下KEY0冲汽，放开不冲汽

按下KEY2放汽，放开不放汽

// C语言版

#include<pic.h>
#define uchar unsigned char

#define key0 GP0   //105S充气开关
#define key1 GP1   //一按一充开关
#define key2 GP2   //一按一放气开关

#define LED0 GP4   //模拟放气LED灯
#define LED1 GP5   //模拟充气LED灯

#define LONG_TIME 1050  //充气时间
#define LONG_AN  20  //长按充气开关时间

bit key0_flag;    //按键次数奇偶性
uchar count;    //长按充气时间变量
int r;

__CONFIG(0XFF6);
/******************************/
//初始化函数
void Init(void)
{
TRIS = 0xcf; //11001111
LED0 = 0;
LED1 = 0;
key0_flag = 0;
count = 0;
OPTION = 0X4F;
}
/******************************/
/******************************/
//延时100MS时间函数
void delay(void)
{
uchar i,j;
for(i=0;i<50;i++)
for(j=0;j<177;j++) //100m
;
}

void main()
{
Init();    //初始化
while(1)
{
  asm("CLRWDT");
  if(!key0)  //充气按键按下
  {
   delay();
   if(!key0)
   {
    LED1 = 1;  //开始充气
    for(r=0;r<LONG_TIME;r++)  //延时105S
    {
     delay();
     if(r%20 == 0)
      asm("CLRWDT");
     if(!key0 && key0_flag)  //判断是否为长按
     {
      count++;
      if(count >= LONG_AN)
      {
       LED1 = 0;   //是长按就不充气了
       break;
      }
     }
     else
      count = 0;
    }
    LED1 = 0;
    LED0 = 0;
    while(!key0);
    key0_flag = 1;
   }
  }
  if(!key1)
  {
   delay();
   if(!key1)
   {
    LED1 = 1;
    LED0 = 0;
    while(!key1);
    LED1 = 0;
   }
  }
  if(!key2)
  {
   delay();
   if(!key2)
   {
    LED0 = 1;
    LED1 = 0;
    while(!key2);
    LED0 = 0;
   }
  }

}

}

;汇编版

GPIO EQU  06H
TMR0 EQU  01H
STATUS EQU  03H

DEL1 EQU  11H   ;时间延时变量
DEL2 EQU  12H
DEL3 EQU  13H
COUNT EQU  14H   ;按键KEY0长按时间变量
KEY_NUMBER EQU 15H   ;按键KEY0按键次数变量

KEY0 EQU  0 ;按键0，冲汽105S
KEY1 EQU  1 ;按键1，按下冲汽，放开不冲
KEY2 EQU  2 ;按键2，按下放汽，放开不放汽

LED0 EQU 4
LED1 EQU 5

__CONFIG(0XFF6);

ORG  00H
  NOP
  MOVLW 0CFH ;11001111
  TRIS GPIO
  MOVLW 47H  ;设置定时器
  OPTION

  MOVLW 0FFH   ;初始化变量
  MOVWF KEY_NUMBER
START: BCF  GPIO,LED0  ;初始化输出口
  BCF  GPIO,LED1
  MOVLW 28H
  MOVWF COUNT

CHECK_KEY0:     ;判断按键0
  BTFSC GPIO,KEY0
  GOTO CHECK_KEY1
  CALL DELAY
  BTFSC GPIO,KEY0
  GOTO CHECK_KEY1

  INCF KEY_NUMBER ;按键次数加1
  BSF  GPIO,LED1 ;冲汽
  CALL TIME_105S ;延时105S

CHECK_KEY1:     ;判断按键1
  BTFSC GPIO,KEY1
  GOTO CHECK_KEY2
  CALL DELAY
  BTFSC GPIO,KEY1
  GOTO CHECK_KEY2

  BSF  GPIO,LED1 ;冲汽
KEY1_UP:
  BTFSS GPIO,KEY1
  GOTO KEY1_UP  ;放开按键
  BSF  GPIO,LED1 ;不冲汽

CHECK_KEY2:     ;判断按键2
  BTFSC GPIO,KEY2
  GOTO START
  CALL DELAY
  BTFSC GPIO,KEY2
  GOTO START
  BSF  GPIO,LED0 ;按下，放汽
KEY2_UP:
  BTFSS GPIO,KEY2
  GOTO KEY2_UP
  BSF  GPIO,LED0 ;放开，不放汽
  GOTO START

DELAY:      ;按键去斗延时
  MOVLW 10H
  MOVWF DEL1
DE1: MOVLW 64H
  MOVWF DEL2
DE2: DECFSZ DEL2
  GOTO DE2
  DECFSZ DEL1
  GOTO DE1
  RETURN


TIME_105S:    ;延时105S
  CLRF TMR0
  MOVLW 02H
  MOVWF DEL1
LOOP1: MOVLW 10H
  MOVWF DEL2
LOOP2: MOVLW 40H
  MOVWF DEL3
LOOP3: CLRF TMR0
;-----------------------------------
  MOVLW 00H    ;判断KEY0是否为第一次按
  SUBWF KEY_NUMBER,0
  SKPZ REST
;----------------------------------
  BTFSC GPIO,KEY0  ;判断KEY0是否长按2S
  GOTO LOOP
  DECFSZ COUNT
  GOTO LOOP
  BCF  GPIO,LED1
;--------------------------------
KEY_UP: BTFSS GPIO,KEY0
  GOTO KEY_UP
  GOTO STOP

REST: MOVLW 28H
  MOVWF COUNT
;----------------------------------
LOOP:
  MOVLW 0C3H ;定时器延时 195*256=5000MS
  SUBWF TMR0,0
  SKPZ OK
  GOTO LOOP
OK:
  DECFSZ DEL3
  GOTO LOOP3
  DECFSZ DEL2
  GOTO LOOP2
  DECFSZ DEL1
  GOTO LOOP1
STOP: RETURN
END