stm32f103 timer1产生400HzPWM

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/*timer1时钟为72MHz，产生400Hz，占空比为60%的PWM*/void Bsp_Motor_PWM_Init(void){    TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStruct;    TIM_OCInitTypeDef       TIM_OCInitStruct;    GPIO_InitTypeDef GPIO_InitStruct;    RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1 | RCC_APB2Periph_GPIOA, ENABLE);    GPIO_InitStruct.GPIO_Pin = GPIO_Pin_8;    GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF_PP;    GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;    GPIO_Init(GPIOA, &GPIO_InitStruct);    TIM_TimeBaseInitStruct.TIM_Period = 59999; /*400Hz(2.5ms) */    TIM_TimeBaseInitStruct.TIM_Prescaler = 2;    TIM_TimeBaseInitStruct.TIM_ClockDivision = 0;    TIM_TimeBaseInitStruct.TIM_CounterMode = TIM_CounterMode_Up;    TIM_TimeBaseInit(TIM1, &TIM_TimeBaseInitStruct);    TIM_OCStructInit(&TIM_OCInitStruct);/*这一步最好加上*/        TIM_OCInitStruct.TIM_OCMode = TIM_OCMode_PWM1;    TIM_OCInitStruct.TIM_OutputState = TIM_OutputState_Enable;    TIM_OCInitStruct.TIM_Pulse = 36000;    TIM_OCInitStruct.TIM_OCPolarity = TIM_OCPolarity_High;    TIM_OC1Init(TIM1, &TIM_OCInitStruct);    TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);    TIM_ARRPreloadConfig(TIM1, ENABLE);    TIM_CtrlPWMOutputs(TIM1, ENABLE);/*这一个函数只针对timer1和timer8*/    TIM_Cmd(TIM1, ENABLE);      }
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