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
}
}
```