基于STM32的多功能秒表_用stm32显示秒表的程序 野火

基于STM32的多功能秒表

当上电运行后，按下KEY1,秒表开始正计时，再次按下KEY1秒表停止计时，按下KEY2秒表清零，按下KEY3，手动调节秒表时间递增，按下KEY4手动调节秒表时间递减，按下KEY5秒表倒计时，倒计时到0时蜂鸣器响起来。

#include "stm32f10x.h"
#include "sys.h"
#define FM PBout(10)
#define uint unsigned int
#define KEY1 GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_11)
#define KEY2 GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_12)
#define KEY3 GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_13)
#define KEY4 GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_14)
#define KEY5 GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_15)
void Smg_Init(void);
void Key_Init(void);
void FM_Init(void);  //蜂鸣器初始化
void Delay(void);
void TIM3_Init(u16 arr,u16 psc);
void TIM2_Init(u16 arr,u16 psc);
uint arr1[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};//没有小数点数码管
uint arr2[]={0xbf,0x86,0xdb,0xcf,0xe6,0xed,0xfd,0x87,0xff,0xef};//小数点数码管
uint disp1[2],disp2[2];
uint ID=0;
uint b=0;
uint a,temp1,temp2,flag=0;
int main(void)
{
	NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); //设置2位抢占优先级2位响应优先级
    Smg_Init();
    Key_Init();
    FM_Init();
    TIM3_Init(220,7199);   //时钟参数配置
    TIM2_Init(220,7199);
    while(1)
    {
        if(KEY1==0)
        {
            Delay();
            if(KEY1==0)
            {
                ID++;
                if(ID==3)         
                    ID=1;          
            }     
            switch(ID)
            {
                case 1:
                    TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE); //使能时钟，允许更新中断
                    TIM_Cmd(TIM3,ENABLE);  //使能时钟
                    break;
                case 2:
                    TIM_ITConfig(TIM3,TIM_IT_Update,DISABLE); //关闭更新中断
                    TIM_Cmd(TIM3,DISABLE); //关闭时钟
                    break;
            }
            while(KEY1==0);
        }
        if(KEY2==0)  //清空秒表
        {
            a=0;
            b=0;
            GPIO_Write(GPIOA,0x3fbf);
            GPIO_Write(GPIOC,0x3f3f);
            while(KEY2==0);
        }
        if(KEY3==0)  //手动加数
        {
            a++;
            disp1[0]=arr1[a%10];
            disp1[1]=arr1[a/10];
            disp2[0]=arr2[b%10];
            disp2[1]=arr1[b/10];
            temp1=(disp1[1]<<8)|(disp1[0]&0x00ff);
            temp2=(disp2[1]<<8)|(disp2[0]&0x00ff);
            GPIO_Write(GPIOC,temp1);
            GPIO_Write(GPIOA,temp2);
            while(KEY3==0);
        } 
        if(KEY4==0)  //手动减数
        {
            a--;
            disp1[0]=arr1[a%10];
            disp1[1]=arr1[a/10];
            disp2[0]=arr2[b%10];
            disp2[1]=arr1[b/10];
            temp1=(disp1[1]<<8)|(disp1[0]&0x00ff);
            temp2=(disp2[1]<<8)|(disp2[0]&0x00ff);
            GPIO_Write(GPIOC,temp1);
            GPIO_Write(GPIOA,temp2);
            while(KEY4==0);
        }  
        if(KEY5==0)  //倒计时
        {
            TIM_ITConfig(TIM2,TIM_IT_Update,ENABLE); //使能时钟，允许更新中断
            TIM_Cmd(TIM2,ENABLE);  //使能时钟
            flag=1;
            while(KEY5==0);
        }         
    }       
}
void Smg_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOC,ENABLE);
    GPIO_InitStructure.GPIO_Pin=0xffff;
    GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP;
    GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
    GPIO_Init(GPIOA,&GPIO_InitStructure);
    GPIO_Init(GPIOC,&GPIO_InitStructure);
    GPIO_Write(GPIOA,0x3fbf);
    GPIO_Write(GPIOC,0x3f3f);
}
void Key_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);
    GPIO_InitStructure.GPIO_Pin=GPIO_Pin_11|GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15;
    GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IPU;  //上拉
    GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
    GPIO_Init(GPIOB,&GPIO_InitStructure);
}
void FM_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);
    GPIO_InitStructure.GPIO_Pin=GPIO_Pin_10;
    GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP;
    GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
    GPIO_Init(GPIOB,&GPIO_InitStructure);
    GPIO_SetBits(GPIOB,GPIO_Pin_10);
}
void TIM3_Init(u16 arr,u16 psc)
{
    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
    NVIC_InitTypeDef NVIC_InitStructure;
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE);
    
    TIM_TimeBaseStructure.TIM_Period=arr;  //周期
    TIM_TimeBaseStructure.TIM_Prescaler=psc;  //分频系数
    TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1;//分频因子
    TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up;//计数模式
    TIM_TimeBaseInit(TIM3,&TIM_TimeBaseStructure);
      
    NVIC_InitStructure.NVIC_IRQChannel=TIM3_IRQn;//TIM3中断
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0;// 抢占优先级
    NVIC_InitStructure.NVIC_IRQChannelSubPriority=3;       //响应优先级
    NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
    NVIC_Init(&NVIC_InitStructure);
}
void TIM2_Init(u16 arr,u16 psc)
{
    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure1;
    NVIC_InitTypeDef NVIC_InitStructure1;
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE);
    
    TIM_TimeBaseStructure1.TIM_Period=arr;  //周期
    TIM_TimeBaseStructure1.TIM_Prescaler=psc;  //分频系数
    TIM_TimeBaseStructure1.TIM_ClockDivision=TIM_CKD_DIV1;//分频因子
    TIM_TimeBaseStructure1.TIM_CounterMode=TIM_CounterMode_Up;//计数模式
    TIM_TimeBaseInit(TIM2,&TIM_TimeBaseStructure1);
      
    NVIC_InitStructure1.NVIC_IRQChannel=TIM2_IRQn;//TIM2中断
    NVIC_InitStructure1.NVIC_IRQChannelPreemptionPriority=0;// 抢占优先级
    NVIC_InitStructure1.NVIC_IRQChannelSubPriority=3;       //响应优先级
    NVIC_InitStructure1.NVIC_IRQChannelCmd=ENABLE;
    NVIC_Init(&NVIC_InitStructure1);
}
void TIM3_IRQHandler(void)  //TIM3中断服务程序
{
    a++;
    disp1[0]=arr1[a%10];
    disp1[1]=arr1[a/10];
    disp2[0]=arr2[b%10];
    disp2[1]=arr1[b/10];
    temp1=(disp1[1]<<8)|(disp1[0]&0x00ff);
    temp2=(disp2[1]<<8)|(disp2[0]&0x00ff);
    GPIO_Write(GPIOC,temp1);
    GPIO_Write(GPIOA,temp2);
    if(a==60)
    {
        a=0;
        b++;
    }  
    if(b==60)
    {
        b=0;
        a=0;
    }
    TIM_ClearITPendingBit(TIM3,TIM_IT_Update);
}
void TIM2_IRQHandler(void)  //TIM2中断服务程序
{
    a--;
    disp1[0]=arr1[a%10];
    disp1[1]=arr1[a/10];
    disp2[0]=arr2[b%10];
    disp2[1]=arr1[b/10];
    temp1=(disp1[1]<<8)|(disp1[0]&0x00ff);
    temp2=(disp2[1]<<8)|(disp2[0]&0x00ff);
    GPIO_Write(GPIOC,temp1);
    GPIO_Write(GPIOA,temp2);
    if(a==0)
    {
        if(b!=0)
        {
            b--;
            a=60;
        }
    }
    if((a==0)&&(b==0)&&(flag==1))
    {
        flag=0;a=0;b=0;
        GPIO_Write(GPIOA,0x3fbf);
        GPIO_Write(GPIOC,0x3f3f);     
        while(1)
        {
            FM=~FM;
            Delay();
        }
    }     
    TIM_ClearITPendingBit(TIM2,TIM_IT_Update);
}            
void Delay(void)
{
    uint i,j;
    for(i=0;i<50;i++)
    for(j=0;j<80;j++);
}

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硬件电路原理图