stm32f103c8t6 time1生成pwm波

#include "pwm.h" //#include "led.h" //PWM输出初始化 //arr：自动重装值 //psc：时钟预分频数 void TIM1_PWM_Init(u16 arr,u16 psc,double ch2_duty ) { GPIO_InitTypeDef GPIO_InitStructure; TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_OCInitTypeDef TIM_OCInitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);// 使能定时器1 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA , ENABLE); //使能GPIO外设时钟使能 //设置该引脚为复用输出功能,输出TIM1 CH1的PWM脉冲波形 //GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8|GPIO_Pin_9; //TIM_CH1 CH2 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; //TIM_CH1 CH2 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOA, &GPIO_InitStructure); TIM_TimeBaseStructure.TIM_Period = arr; //设置在下一个更新事件装入活动的自动重装载寄存器周期的值 80KHZ TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置用来作为TIMx时钟频率除数的预分频值 不分频 TIM_TimeBaseStructure.TIM_ClockDivision = 0; //设置时钟分割:TDTS = Tck_tim TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM向上计数模式 TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure); //根据TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位 // TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; //选择定时器模式:TIM脉冲宽度调制模式2 // TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //比较输出使能 // TIM_OCInitStructure.TIM_Pulse = (arr - 1) * ch1_duty / 100; //设置待装入捕获比较寄存器的脉冲值 // TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //输出极性:TIM输出比较极性高 // TIM_OC1Init(TIM1, &TIM_OCInitStructure); //根据TIM_OCInitStruct中指定的参数初始化外设TIMx 通道1 TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; //选择定时器模式:TIM脉冲宽度调制模式2 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //比较输出使能 TIM_OCInitStructure.TIM_Pulse = (arr - 1) * ch2_duty / 100; //设置待装入捕获比较寄存器的脉冲值 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //输出极性:TIM输出比较极性高 TIM_OC2Init(TIM1, &TIM_OCInitStructure); //根据TIM_OCInitStruct中指定的参数初始化外设TIMx 通道1 TIM_CtrlPWMOutputs(TIM1,ENABLE); //MOE 主输出使能 // TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable); //CH1预装载使能 TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Enable); //CH2预装载使能 TIM_ARRPreloadConfig(TIM1, ENABLE); //使能TIMx在ARR上的预装载寄存器 TIM_Cmd(TIM1, ENABLE); //使能TIM1 }