写一个用STM32F103C8T6的TIM5来计算函数运行时间的代码

这是一个技术问题，我可以为您提供一个代码示例：

#include "stm32f10x.h"
#include <stdio.h>

uint32_t start_time, end_time, time_elapsed;

void TIM5_IRQHandler(void) {
// Get the current time from the timer
end_time = TIM5->CNT;

// Calculate the time elapsed since the start
time_elapsed = end_time - start_time;

// Reset the timer
TIM5->CNT = 0;

// Clear the timer interrupt flag
TIM5->SR &= ~TIM_SR_UIF;
}

int main(void) {
// Initialize TIM5
RCC->APB1ENR |= RCC_APB1ENR_TIM5EN;

TIM5->PSC = 0;
TIM5->ARR = 0xFFFFFFFF;

TIM5->CR1 |= TIM_CR1_CEN;

// Enable the timer interrupt
TIM5->DIER |= TIM_DIER_UIE;
NVIC_EnableIRQ(TIM5_IRQn);

// Start the timer
start_time = TIM5->CNT;

// Run the function to be timed
// ...

// Stop the timer
end_time = TIM5->CNT;

// Calculate the time elapsed
time_elapsed = end_time - start_time;

// Print the result
printf("Time elapsed: %d\n", time_elapsed);

while (1) {
// ...
}
}

注意：本示例仅供参考，具体实现可能需要根据您的需求进行修改。