基于keil编写stm32f103互补输出PWM的代码，使用TIM1，部分映射管脚

以下是基于Keil编写的STM32F103互补输出PWM的代码，使用TIM1，其中PA8和PA9被映射到TIM1的通道1和通道2上：

#include "stm32f10x.h"

int main(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
    TIM_OCInitTypeDef TIM_OCInitStructure;

    // 使能GPIOA和TIM1的时钟
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_TIM1, ENABLE);

    // 配置PA8和PA9为复用推挽输出
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    // 配置TIM1的时基
    TIM_TimeBaseStructure.TIM_Period = 999;  // 1kHz的PWM频率
    TIM_TimeBaseStructure.TIM_Prescaler = 71;  // 72MHz时钟，分频为72，计数器时钟为1MHz
    TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);

    // 配置TIM1的通道1
    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
    TIM_OCInitStructure.TIM_Pulse = 0;  // 初始占空比为0
    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
    TIM_OC1Init(TIM1, &TIM_OCInitStructure);

    // 配置TIM1的通道2
    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
    TIM_OCInitStructure.TIM_Pulse = 0;  // 初始占空比为0
    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
    TIM_OC2Init(TIM1, &TIM_OCInitStructure);

    // 启动TIM1
    TIM_Cmd(TIM1, ENABLE);

    // 设置TIM1的互补输出模式
    TIM_BDTRInitTypeDef TIM_BDTRInitStructure;
    TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable;
    TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable;
    TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_OFF;
    TIM_BDTRInitStructure.TIM_DeadTime = 50;  // 50ns的死区时间
    TIM_BDTRInitStructure.TIM_Break = TIM_Break_Disable;
    TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_Low;
    TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable;
    TIM_BDTRConfig(TIM1, &TIM_BDTRInitStructure);

    // 设置TIM1的互补输出使能
    TIM_CCPreloadControl(TIM1, ENABLE);
    TIM_CtrlPWMOutputs(TIM1, ENABLE);

    while (1) {
        // 修改TIM1通道1的占空比，使LED灯逐渐亮起
        for (int i = 0; i <= 1000; i += 10) {
            TIM_SetCompare1(TIM1, i);
            TIM_SetCompare2(TIM1, 1000 - i);
            for (int j = 0; j < 100000; j++);  // 延时一段时间
        }
    }
}

这个代码先配置了GPIOA的PA8和PA9为复用推挽输出，然后配置了TIM1的时基和两个通道的PWM输出模式。接着设置了TIM1的互补输出模式并使能互补输出，最后在主循环中修改TIM1通道1和通道2的占空比，使得互补输出的PWM信号逐渐改变。