利用TIM计数耗费1s,启动中断，秒表加一
时间显示代码：
c
#include "stm32f10x.h" // Device header
#include "Delay.h"
#include "OLED.h"
uint16_t num = 0;
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
/*初始化通用定时器TIM2*/
void Timer_Init(void){
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);//APB1外设开启
TIM_InternalClockConfig(TIM2);//选择内部时钟
/*初始化时基单元*/
TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;//向上计数
TIM_TimeBaseInitStructure.TIM_Period = 10000 - 1;//ARR自动重装
TIM_TimeBaseInitStructure.TIM_Prescaler = 7200 - 1;//psc预分频器
TIM_TimeBaseInitStructure.TIM_RepetitionCounter = 0;//高级计时器内容直接给零
//记录1s
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseInitStructure);//刚初始化完就会进中断
TIM_ClearFlag(TIM2, TIM_FLAG_Update);//消除中断标志位
//使能更新中断
TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);
/*配置中断*/
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);//选择组2
NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;//定时器2在NVIC内的通道
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_Init(&NVIC_InitStructure);
TIM_Cmd(TIM2, ENABLE);//启动定时器
}
unsigned char time[] = {23, 59, 30};
unsigned int date[] = {2023, 12, 31};
char month[] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
void Show_Time(void){
OLED_ShowNum(1,1,time[0], 2);
OLED_ShowString(1, 3, ":");
OLED_ShowNum(1,4,time[1], 2);
OLED_ShowString(1, 6, ":");
OLED_ShowNum(1,7,time[2], 2);
}
void Time_Control(void){
time[2] = time[2] + 1;
if(time[2] >= 60){
time[2] = 0;
time[1] = time[1] + 1;
if(time[1] >= 60){
time[1] = 0;
time[0] = time[0] + 1;
if(time[0] >= 24){
time[0] = 0;
date[2] = date[2] + 1;
if(date[2] >= month[date[1]] + 1){
date[2] = 1;
date[1] = date[1] + 1;
if(date[1] >= 13){
date[1] = 1;
date[0] = date[0] + 1;
if(date[0] >= 9999){
date[0] = 2023;
}
}
}
}
}
}
Show_Time();
}
void TIM2_IRQHandler(void){//定时器2的中断函数，名字固定
if(TIM_GetITStatus(TIM2, TIM_IT_Update) == SET){
TIM_ClearITPendingBit(TIM2, TIM_IT_Update);//清除标志位
Time_Control();
}
}
void month2_Control(void){//判别闰平年
if((date[0] % 4 == 0 && date[0] % 100 != 0 )|| date[0] % 400 == 0) month[2] = 29;
else month[2] = 28;
}
int main(void){
OLED_Init();//初始化OLED
Timer_Init();
while(1){
// Show_Time();
}
}
时间 + 日期代码：
c
#include "stm32f10x.h" // Device header
#include "Delay.h"
#include "OLED.h"
uint16_t num = 0;
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
/*初始化通用定时器TIM2*/
void Timer_Init(void){
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);//APB1外设开启
TIM_InternalClockConfig(TIM2);//选择内部时钟
/*初始化时基单元*/
TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;//向上计数
TIM_TimeBaseInitStructure.TIM_Period = 10000 - 1;//ARR自动重装
TIM_TimeBaseInitStructure.TIM_Prescaler = 7200 - 1;//psc预分频器
TIM_TimeBaseInitStructure.TIM_RepetitionCounter = 0;//高级计时器内容直接给零
//记录1s
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseInitStructure);//刚初始化完就会进中断
TIM_ClearFlag(TIM2, TIM_FLAG_Update);//消除中断标志位
//使能更新中断
TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);
/*配置中断*/
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);//选择组2
NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;//定时器2在NVIC内的通道
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_Init(&NVIC_InitStructure);
TIM_Cmd(TIM2, ENABLE);//启动定时器
}
unsigned char time[] = {22, 59, 30};
unsigned int date[] = {2023, 12, 31};
char month[] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
void Show_Time(void){
OLED_ShowNum(1,1,time[0], 2);
OLED_ShowString(1, 3, ":");
OLED_ShowNum(1,4,time[1], 2);
OLED_ShowString(1, 6, ":");
OLED_ShowNum(1,7,time[2], 2);
}
void Show_Date(void){
OLED_ShowNum(2,1,date[0], 4);
OLED_ShowString(2, 5, "/");
OLED_ShowNum(2,6,date[1], 2);
OLED_ShowString(2, 7, "/");
OLED_ShowNum(2,8,date[2], 2);
}
void Time_Control(void){
time[2] = time[2] + 1;
if(time[2] >= 60){
time[2] = 0;
time[1] = time[1] + 1;
if(time[1] >= 60){
time[1] = 0;
time[0] = time[0] + 1;
if(time[0] >= 24){
time[0] = 0;
date[2] = date[2] + 1;
if(date[2] >= month[date[1]] + 1){
date[2] = 1;
date[1] = date[1] + 1;
if(date[1] >= 13){
date[1] = 1;
date[0] = date[0] + 1;
if(date[0] >= 9999){
date[0] = 2023;
}
}
}
}
}
}
Show_Time();
Show_Date();
}
void TIM2_IRQHandler(void){//定时器2的中断函数，名字固定
if(TIM_GetITStatus(TIM2, TIM_IT_Update) == SET){
TIM_ClearITPendingBit(TIM2, TIM_IT_Update);//清除标志位
Time_Control();
}
}
void month2_Control(void){//判别闰平年
if((date[0] % 4 == 0 && date[0] % 100 != 0 )|| date[0] % 400 == 0) month[2] = 29;
else month[2] = 28;
}
int main(void){
OLED_Init();//初始化OLED
Timer_Init();
while(1){
// Show_Time();
}
}