stm32f103c8t6pwm的配库函数

在STM32F103C8T6中，可以使用库函数来实现PWM功能。下面是一个使用库函数进行PWM初始化和设置的例子：

#include "stm32f10x.h"

void PWM_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
    TIM_OCInitTypeDef TIM_OCInitStructure;

    // 使能GPIO和定时器时钟
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);

    // 配置GPIO引脚
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    // 配置定时器
    TIM_TimeBaseStructure.TIM_Period = 999; // 设置周期为1000
    TIM_TimeBaseStructure.TIM_Prescaler = 71; // 设置预分频为72
    TIM_TimeBaseStructure.TIM_ClockDivision = 0;
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);

    // 配置PWM输出通道
    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
    TIM_OCInitStructure.TIM_Pulse = 500; // 设置占空比为50%
    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
    TIM_OC1Init(TIM2, &TIM_OCInitStructure);
    TIM_OC1PreloadConfig(TIM2, TIM_OCPreload_Enable);

    // 启动定时器
    TIM_Cmd(TIM2, ENABLE);
}

这段代码使用了TIM2定时器和GPIOA的引脚0来实现PWM输出。通过调整`TIM_TimeBaseStructure.TIM_Period`和`TIM_OCInitStructure.TIM_Pulse`的值，可以实现不同的占空比和频率。