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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]
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]
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]
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 |