pwm互补波输出

caixiaoqing627 · 发表于 2015-8-13 20:39:07

[mw_shl_code=c,true] GPIO_InitTypeDef GPIO_InitStructure; TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_OCInitTypeDef TIM_OCInitStructure; TIM_BDTRInitTypeDef TIM_BDTRInitStructure; //?????±?? RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1,ENABLE); //TIM1?±?????? RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE); //????PORTA?±?? RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO, ENABLE); GPIO_PinRemapConfig(GPIO_PartialRemap_TIM1,ENABLE); //io???????? GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9|GPIO_Pin_7|GPIO_Pin_8; //GPIOA9,GPIOA9 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //???????? GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //????50MHz GPIO_Init(GPIOA,&GPIO_InitStructure); //??????PA9,PA7 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0; //GPIOA9,GPIOA9 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //???????? GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //????50MHz GPIO_Init(GPIOB,&GPIO_InitStructure); //??????PA9,PA7 //?¨?±?÷?ù±????? TIM_TimeBaseStructure.TIM_Period=arr; //×?????×°???? TIM_TimeBaseStructure.TIM_Prescaler=psc; //?¨?±?÷·??? TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1; //???ù·??? TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up; //?ò?????????? TIM_TimeBaseInit(TIM1,&TIM_TimeBaseStructure);//???????¨?±?÷1 //??????TIM1 PWM???? ?????·?????¨ TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //?????¨?±?÷????:TIM?????í???÷??????2 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //±??????????? TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //????????:TIM????±????????? TIM_OCInitStructure.TIM_OCIdleState=TIM_OCIdleState_Reset; //?????ó????×??? TIM_OC1Init(TIM1, &TIM_OCInitStructure); //?ù??T???¨???????????????èTIM1 4OC1 TIM_OCInitStructure.TIM_OCNPolarity=TIM_OCNPolarity_High; //?è???????????????? TIM_OCInitStructure.TIM_OutputNState=TIM_OutputNState_Enable; //?????????????? TIM_OCInitStructure.TIM_OCNIdleState=TIM_OCNIdleState_Reset; //?????ó??????????×??? TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable); //????TIM14??CCR1?????¤×°???????÷ //?????·?????¨ TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //?????¨?±?÷????:TIM?????í???÷??????2 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //±??????????? TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //????????:TIM????±????????? TIM_OCInitStructure.TIM_OCIdleState=TIM_OCIdleState_Reset; //?????ó????×??? TIM_OCInitStructure.TIM_OCNPolarity=TIM_OCNPolarity_High; //?è???????????????? TIM_OCInitStructure.TIM_OutputNState=TIM_OutputNState_Enable; //?????????????? TIM_OCInitStructure.TIM_OCNIdleState=TIM_OCNIdleState_Reset; //?????ó??????????×??? TIM_OC2Init(TIM1, &TIM_OCInitStructure); //?ù??T???¨???????????????èTIM1 4OC1 TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Enable); //????TIM14??CCR1?????¤×°???????÷ //?????????????????? TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable; //?????????????????? TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable; //?????????????????? TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_OFF; //???¨?è?? TIM_BDTRInitStructure.TIM_DeadTime = 0x60; //?????±???è?? TIM_BDTRInitStructure.TIM_Break = TIM_Break_Disable; //???????????? TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High; //???????????? TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Disable;//×??????????? TIM_BDTRConfig(TIM1,&TIM_BDTRInitStructure); TIM_ARRPreloadConfig(TIM1,ENABLE);//ARPE???? TIM_Cmd(TIM1, ENABLE); //????TIM14 TIM_CtrlPWMOutputs(TIM1, ENABLE); [/mw_shl_code] [mw_shl_code=c,true][/mw_shl_code] [mw_shl_code=c,true]现在我需要两种模式一种是输出带死区互补的pwm波，另外一种就是TIM1的CH1正常输出pwm，CH1N输出低电平，这两种模式来回转换，第二种模式我现在用 TIM_CCxCmd(TIM1,TIM_Channel_1,TIM_CCxN_Disable); TIM_SetCompare1(TIM1,20); 函数控制，但是输出并不是低电平，而是pwm波，感觉莫名其妙，求大神解答[/mw_shl_code]