利用TIM计数耗费1s,启动中断，秒表加一
时间显示代码：

#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2NVIC_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OLEDTimer_Init();while(1){ // Show_Time();}
}

时间 + 日期代码：

#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2NVIC_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OLEDTimer_Init();while(1){ // Show_Time();}
}