一、定时器定时中断
1.1 main.c
/* Includes ------------------------------------------------------------------*/
#include "stm32f10x.h" // Device header
#include "OLED.h"
#include "Timer.h"/* 声明全局变量 ------------------------------------------------------------------*/
uint16_t Num = 0;/* 主函数 ------------------------------------------------------------------*/
int main(void)
{/*-------- 初始化硬件 --------*/OLED_Init(); // OLED初始化Timer_Init(); // 定时器初始化/*-------- OLED显示 --------*/OLED_ShowString(1, 1, "Num: "); // 5
// OLED_ShowString(2, 1, "Count: "); // 7while(1){OLED_ShowNum(1, 8, Num, 5);
// OLED_ShowNum(2, 8, TIM_GetCounter(TIM2), 5);}}/* 定时器中断函数 ------------------------------------------------------------------*/
void TIM2_IRQHandler(void)
{if (TIM_GetITStatus(TIM2, TIM_IT_Update) == SET){ // 检查更新中断标志位Num++;TIM_ClearITPendingBit(TIM2, TIM_IT_Update); // 清除更新中断标志位}
}
1.2 Timer.c
/* Includes ------------------------------------------------------------------*/
#include "stm32f10x.h" // Device headervoid Timer_Init(void)
{/*-------- 声明和初始化变量 --------*/TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStruct;NVIC_InitTypeDef NVIC_InitStruct;TIM_TimeBaseInitStruct.TIM_ClockDivision = TIM_CKD_DIV1; // 滤波时钟的分频配置TIM_TimeBaseInitStruct.TIM_CounterMode = TIM_CounterMode_Up; // 向上计数模式TIM_TimeBaseInitStruct.TIM_Period = 10000 - 1; // 自动重装值（相当于1s重装载1次）TIM_TimeBaseInitStruct.TIM_Prescaler = 7200 - 1; // 预分频值（当前f = 10,000Hz, T = 0.1ms）TIM_TimeBaseInitStruct.TIM_RepetitionCounter = 0; // 重复计数器只有高级定时器才有NVIC_InitStruct.NVIC_IRQChannel = TIM2_IRQn; // 指定中断通道NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE; // 使能NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 1; // 抢占优先级NVIC_InitStruct.NVIC_IRQChannelSubPriority = 1; // 响应优先级/*-------- 配置时钟 --------*/RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE); // 使能TIM2时钟TIM_InternalClockConfig(TIM2); // 选择内部时钟源/*-------- 配置时基单元 --------*/TIM_TimeBaseInit(TIM2, &TIM_TimeBaseInitStruct);TIM_ClearFlag(TIM2, TIM_FLAG_Update); // 手动清除中断标志位/*-------- 使能更新中断 --------*/TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);/*-------- 配置NVIC --------*/NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); // 注意：整个芯片只能使用1种分组NVIC_Init(&NVIC_InitStruct);/*-------- 启动TIM --------*/TIM_Cmd(TIM2, ENABLE);}
