對應(yīng)于開發(fā)實例2，TIM1時鐘為72MHz，若需要在TIM1CH2通道輸出頻率為10KHz，占空比為91%的PWM脈沖，那么定時器的各項參數(shù)該如何給定呢？并對PWM配置程序進行修改。 TIM_TimeBaseStructure.TIM_Prescaler =71; TIM_TimeBaseStructure.TIM_Period =49; TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure); TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; TIM_OCInitStructure.TIM_Pulse = 47; TIM_OC1Init(TIM1, &TIM_OCInitStructure); TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable) ; TIM_ARRPreloadConfig(TIM1, ENABLE); TIM_Cmd(TIM1, ENABLE); TIM_CtrlPWMOutputs(TIM1,ENABLE);