想请各位大佬看看这个代码哪里有问题

yousse · 发表于 2018-3-20 14:25:30

我想实现的功能是，按键0，光敏感受器读数据，led0随着这个数值变大变小（期间一直不断读取数据，不是按一次读一次），按键1按下蜂鸣器响，三秒一次，按键2按下停止采集数据，蜂鸣器停止，led全灭，但是现在我前两个按键功能都可以实现，就是按键2停不下来，想知道哪里有问题，以下是源代码
#include "sys.h"
#include "delay.h"
#include "usart.h"
#include "led.h"
#include "lcd.h"
#include "beep.h"
#include "key.h"
#include "adc3.h"
#include "lsens.h"
#include "pwm.h"
#include "stdlib.h"

extern int flag1;
extern int flag2;
extern int flag3;
int main(void)
{
  u8 key;          //±￡′æ¼üÖμ
u8 adcx;
u16 led0pwmval=0;
delay_init(168);    //3õê¼»ˉÑóê±oˉêy
BEEP_Init();       //3õê¼»ˉ·äÃùÆ÷¶Ë¿ú
KEY_Init();          //3õê¼»ˉóë°′¼üá¬½óμÄó2¼t½ó¿ú
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);//éèÖÃÏμí3ÖD¶ÏóÅÏè¼¶·Ö×é2
delay_init(168);    //3õê¼»ˉÑóê±oˉêy
uart_init(115200); //3õê¼»ˉ′®¿ú2¨ìØÂêÎa115200
LED_Init();    //3õê¼»ˉLED
LCD_Init();          //3õê¼»ˉLCD FSMC½ó¿ú
Lsens_Init(); //3õê¼»ˉ1aÃô′«¸DÆ÷
TIM14_PWM_Init(500-1,84-1); //84M/84=1MhzμÄ¼ÆêyÆμÂê,ÖØ×°ÔØÖμ500￡¬Ëùò&#212

WMÆμÂêÎa 1M/500=2Khz.
POINT_COLOR=RED;    //éèÖÃ×ÖìåÎaoìé«
  LCD_ShowString(30,40,210,24,24,"2016141241126");
POINT_COLOR=BLUE; //éèÖÃ×ÖìåÎaà¶é«
LCD_ShowString(30,70,200,16,16,"shujianbo");
LCD_ShowString(30,90,200,12,12,"2018.3.18");
LCD_ShowString(30,130,200,16,16,"LSENS_VAL:");

    while(1)
{
if(key==3){flag1=0;flag2=0;}
   KEY_Scan(); //μÃμ½¼üÖμ
if(flag1)
{
   adcx=Lsens_Get_Val();
   LCD_ShowxNum(30+10*8,130,adcx,3,16,0);//ÏÔê¾ADCμÄÖμ
      LED0=!LED0;
      delay_ms(250);
      delay_ms(10);
      led0pwmval=adcx;
      TIM_SetCompare1(TIM14,led0pwmval);//DT¸Ä±è½ÏÖμ￡¬DT¸ÄÕ¼¿Õ±è
   }
if(flag2){
   LED0=0;
   GPIO_ResetBits(GPIOF,GPIO_Pin_10);
         GPIO_SetBits(GPIOF,GPIO_Pin_8);
   delay_ms(3000);
         GPIO_SetBits(GPIOF,GPIO_Pin_10);
         GPIO_ResetBits(GPIOF,GPIO_Pin_8);
         delay_ms(3000);
   break;
   }
if(flag3){

GPIO_SetBits(GPIOF,GPIO_Pin_10);
GPIO_SetBits(GPIOF,GPIO_Pin_9);
      GPIO_ResetBits(GPIOF,GPIO_Pin_8);

      }
}

}

下面是按键代码key.c
#include "key.h"
#include "delay.h"
#include <stdlib.h>

//°′¼ü3õê¼»ˉoˉêy
int flag1=0,flag2=0,flag3=0;
void KEY_Init(void)
{

GPIO_InitTypeDef  GPIO_InitStructure;

  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA|RCC_AHB1Periph_GPIOE, ENABLE);//ê1ÄüGPIOA,GPIOEê±Öó

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4; //KEY0 KEY1 KEY2¶Ôó|òy½Å
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;//ÆÕí¨êäèëÄ￡ê½
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100M
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//éÏà-
  GPIO_Init(GPIOE, &GPIO_InitStructure);//3õê¼»ˉGPIOE2,3,4


  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;//WK_UP¶Ôó|òy½&#197

A0
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_DOWN ;//ÏÂà-
  GPIO_Init(GPIOA, &GPIO_InitStructure);//3õê¼»ˉGPIOA0

}

u8 KEY_Scan(u8 mode)
{
static u8 key_up=1;//°′¼ü°′Ëé¿a±êÖ¾
if(mode)key_up=1;  //Ö§3Öá¬°′
if(key_up&&(KEY1==0||KEY2==0||KEY3==0||WK_UP==1))
{
delay_ms(10);//è￥¶¶¶ˉ
key_up=0;
if(KEY1==0)return 1;
else if(KEY2==0)return 2;
else if(KEY3==0)return 3;
else if(WK_UP==1)return 4;
}else if(KEY1==1&&KEY2==1&&KEY3==1&&WK_UP==0)key_up=1;
return 0;// ÎT°′¼ü°′ÏÂ
}