stm32定义TIM7定时器设置计数器值和采样分频数代码

解析：这个问题需要生成STM32的代码，用于定义TIM7定时器并设置计数器值和采样分频数。 代码如下： ```c #include "stm32f10x.h" void TIM7_Configuration(uint16_t counter_value, uint16_t sample_frequency) { TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; NVIC_InitTypeDef NVIC_InitStructure; // 使能TIM7时钟 RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM7, ENABLE); // 配置TIM7基本参数 TIM_TimeBaseStructure.TIM_Period = counter_value; // 设置计数器周期 TIM_TimeBaseStructure.TIM_Prescaler = (SystemCoreClock / sample_frequency) - 1; // 设置采样分频数 TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; // 不分频 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; // 向上计数模式 TIM_TimeBaseInit(TIM7, &TIM_TimeBaseStructure); // 使能TIM7更新中断 TIM_ITConfig(TIM7, TIM_IT_Update, ENABLE); // 配置NVIC中断优先级 NVIC_InitStructure.NVIC_IRQChannel = TIM7_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); } int main(void) { uint16_t counter_value = 1000; // 设置计数器值为1000 uint16_t sample_frequency = 1000; // 设置采样分频数为1000Hz TIM7_Configuration(counter_value, sample_frequency); while (1) { // 其他代码逻辑 } } ```