PWM脉冲程序.docx

一个定时器四个通道，分别产生不同频率（这个例子网上也有）vu16 CCR1_Val = 32768;vu16 CCR2_Val = 16384;vu16 CCR3_Val = 8192;vu16 CCR4_Val = 4096;void TIM_Configuration(void){TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;TIM_OCInitTypeDef TIM_OCInitStructure;RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);TIM_TimeBaseStructure.TIM_Period = 65535;TIM_TimeBaseStructure.TIM_Prescaler = 2;TIM_TimeBaseStructure.TIM_ClockDivision = 0;?TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;TIM_TimeBaseInit(TIM2, TIM_TimeBaseStructure);TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Toggle;??????//PWM模式2TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //正向通道有效TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Disable;//反向通道无效TIM_OCInitStructure.TIM_Pulse = CCR1_Val;????????//占空时间TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;????//输出极性TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;????//互补端的极性TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;TIM_OC1Init(TIM2,TIM_OCInitStructure);????????//通道1TIM_OC1PreloadConfig(TIM2, TIM_OCPreload_Disable);TIM_OCInitStructure.TIM_Pulse = CCR2_Val;????????//占空时间TIM_OC2Init(TIM2,TIM_OCInitStructure);????????//通道2TIM_OC2PreloadConfig(TIM2, TIM_OCPreload_Disable);TIM_OCInitStructure.TIM_Pulse = CCR3_Val;????????//占空时间TIM_OC3Init(TIM2,TIM_OCInitStructure);????????//通道3TIM_OC3PreloadConfig(TIM2, TIM_OCPreload_Disable);TIM_OCInitStructure.TIM_Pulse = CCR4_Val;????????//占空时间TIM_OC4Init(TIM2,TIM_OCInitStructure);????????//通道4TIM_OC4PreloadConfig(TIM2, TIM_OCPreload_Disable);TIM_Cmd(TIM2,ENABLE);//TIM_CtrlPWMOutputs(TIM2,ENABLE);?TIM_ITConfig(TIM2, TIM_IT_CC1 | TIM_IT_CC2 | TIM_IT_CC3 | TIM_IT_CC4, ENABLE);}void GPIO_Configuration(void){GPIO_InitTypeDef GPIO_InitStructure;RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD