stm32定时器触发adc采样用代码实现

好的，以下是示范代码：

#include "stm32f4xx.h"
 
void TIM2_IRQHandler(void) {
    // 定时器中断处理函数
    if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET)
    {
        // 清除中断标志位
        TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
        // 开始 ADC 采样
        ADC_SoftwareStartConv(ADC1);
    }
}
 
int main(void) {
    // 初始化时钟等必要参数
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);

    // 配置 ADC1 通道
    ADC_InitTypeDef ADC_InitStruct;
    ADC_InitStruct.ADC_Resolution = ADC_Resolution_12b;
    ADC_InitStruct.ADC_ScanConvMode = DISABLE;
    ADC_InitStruct.ADC_ContinuousConvMode = ENABLE;
    ADC_InitStruct.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
    ADC_InitStruct.ADC_DataAlign = ADC_DataAlign_Right;
    ADC_InitStruct.ADC_NbrOfConversion = 1;
    ADC_Init(ADC1, &ADC_InitStruct);
    // 配置 ADC1 采样通道
    ADC_RegularChannelConfig(ADC1, ADC_Channel_4, 1, ADC_SampleTime_480Cycles);

    // 配置定时器 TIM2
    TIM_TimeBaseInitTypeDef TIM_InitStruct;
    TIM_InitStruct.TIM_Period = 2000; // 定时器周期 2s
    TIM_InitStruct.TIM_Prescaler = 41999; // 定时器分频
    TIM_InitStruct.TIM_ClockDivision = TIM_CKD_DIV1;
    TIM_InitStruct.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInit(TIM2, &TIM_InitStruct);
    // 中断优先级设置
    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);
    // 使能定时器 TIM2
    TIM_Cmd(TIM2, ENABLE);
    // 使能 TIM2 定时器中断
    TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);

    // 一直进行 ADC 采样
    while (1) {
        if (ADC_GetITStatus(ADC1, ADC_IT_EOC) != RESET) {
            // 获取 ADC 采样值
            uint16_t adc_value = ADC_GetConversionValue(ADC1);
            // 处理采样值
            // ...
            // 清除 ADC1 采样完成标志位
            ADC_ClearITPendingBit(ADC1, ADC_IT_EOC);
        }
    }
}

希望对您有所帮助！