MiaoUI/HARDWARE/Tim_Tick.c

#include "Tim_Tick.h"

// 初始化定时器，设置1ms周期的中断
void Timer_Init(void)
{
    // 使能定时器2外设时钟
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);

    // 配置定时器2
    TIM_TimeBaseInitTypeDef TIM_InitStruct;
    TIM_InitStruct.TIM_Prescaler = SystemCoreClock / 1000 - 1;   // 设置预分频值，将时钟频率降低为1KHz
    TIM_InitStruct.TIM_CounterMode = TIM_CounterMode_Up;         // 向上计数模式
    TIM_InitStruct.TIM_Period = 1;                               // 自动重装载寄存器的值，设置为1以产生1ms的中断
    TIM_InitStruct.TIM_ClockDivision = TIM_CKD_DIV1;             // 时钟分割: 不分割
    TIM_InitStruct.TIM_RepetitionCounter = 0;                    // 重复计数器的值，设置为0
    TIM_TimeBaseInit(TIM2, &TIM_InitStruct);

    // 使能定时器2更新中断
    TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);

    // 配置中断优先级
    NVIC_InitTypeDef NVIC_InitStruct;
    NVIC_InitStruct.NVIC_IRQChannel = TIM2_IRQn;
    NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStruct.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStruct);

    // 启动定时器2
    TIM_Cmd(TIM2, ENABLE);
}

// 定时器2中断服务函数
void TIM2_IRQHandler(void)
{
    static uint8_t tims;
    if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET)
    {
        // 清除中断标志位
        TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
        tims++;
        if(tims>5){button_ticks();tims=0;}
    }
}

void Tims_delay_us(uint16_t nus)
{
    uint32_t count = nus * (SystemCoreClock / 1000000);
    while (count--);
}

void Tims_delay_ms(uint32_t xms)
{
	while(xms--)
	{
		Tims_delay_us(1000);
	}
}