写一个stm32输出pwm的程序，频率为10k赫兹

好的，以下是输出10kHz频率的PWM信号的基本程序框架，使用的是STM32的标准库：

#include "stm32f10x.h"

int main(void)
{
  // 初始化GPIO和TIM
  GPIO_InitTypeDef GPIO_InitStructure;
  TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
  TIM_OCInitTypeDef TIM_OCInitStructure;
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOB, &GPIO_InitStructure);
  TIM_TimeBaseStructure.TIM_Period = 999;
  TIM_TimeBaseStructure.TIM_Prescaler = 71;
  TIM_TimeBaseStructure.TIM_ClockDivision = 0;
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
  TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = 499;
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
  TIM_OC2Init(TIM3, &TIM_OCInitStructure);
  TIM_Cmd(TIM3, ENABLE);

  while (1)
  {
  }
}

这个程序使用TIM3的通道2产生PWM信号，输出引脚为GPIOB Pin5。TIM3的时钟频率为72MHz，预分频器为71，计数器周期为999，因此PWM信号的频率为72000000 / (71 + 1) / (999 + 1) = 10kHz。占空比设置为50%。您可以根据需要修改引脚和占空比。