stm32f103c6t6pwm例程

你可以使用以下代码作为 STM32F103C6T6 的 PWM 例程：

#include "stm32f10x.h"

void RCC_Configuration(void)
{
    /* Enable GPIOA clock */
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
    /* Enable TIM1 clock */
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);
}

void GPIO_Configuration(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;

    /* Configure PA8 as alternate function push-pull */
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);
}

void TIM_Configuration(void)
{
    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
    TIM_OCInitTypeDef TIM_OCInitStructure;

    /* Time base configuration */
    TIM_TimeBaseStructure.TIM_Period = 1000 - 1; // PWM周期为1ms
    TIM_TimeBaseStructure.TIM_Prescaler = 72 - 1; // 预分频系数为72
    TIM_TimeBaseStructure.TIM_ClockDivision = 0;
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);

    /* PWM1 Mode configuration: Channel1 */
    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
    TIM_OCInitStructure.TIM_Pulse = 500; // 初始占空比为50%
    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
    TIM_OC1Init(TIM1, &TIM_OCInitStructure);

    TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);

    /* TIM1 enable counter */
    TIM_Cmd(TIM1, ENABLE);
}

int main(void)
{
    RCC_Configuration();
    GPIO_Configuration();
    TIM_Configuration();

    while (1)
    {
        // 可以在这里修改占空比和频率
    }
}

这个例程使用了定时器 TIM1 和 GPIOA 的引脚 PA8，将 PA8 配置为 PWM 输出。可以通过修改 `TIM_OCInitStructure.TIM_Pulse` 的值来调整占空比。