STM32高级定时器TIM1产生两路互补的PWM波

1 /* 配置TIM1复用输出PWM时用到的I/O */ 2 static void TIM1_GPIO_Config(void) 3 { 4 GPIO_InitTypeDef GPIO_InitStructure; 5 6 /* TIM1 clock enable */ 7 RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE); 8 9 /* GPIOA and GPIOB clock enable */10 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB, ENABLE);11 12 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_10;13 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;14 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;15 16 GPIO_Init(GPIOA, &GPIO_InitStructure);17 18 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_14 | GPIO_Pin_15;19 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;20 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;21 22 GPIO_Init(GPIOB, &GPIO_InitStructure);23 24 }

初始化IO

1 u16 CCR2_Val = 500; 2 u16 CCR3_Val = 500;//占空比，周期为1000 3  4 /*配置TIM1输出的PWM信号的模式，如周期、极性、占空比 */ 5 void TIM1_Mode_Config(void) 6 { 7     TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure; 8     TIM_BDTRInitTypeDef      TIM1_BDTRInitStruct; 9     TIM_OCInitTypeDef        TIM_OCInitStructure;10 11     /* Time base configuration */12     TIM_TimeBaseStructure.TIM_Period = 1000-1; //计数周期，向上记到此数，计数值清零13     TIM_TimeBaseStructure.TIM_Prescaler = 72-1;//定时器分频系数，Ftimer = 72M/(TIM_Prescaler+1) = 1ms14     TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;//与死区时间分频有关15     TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;//向上计数模式16     TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);17     18     /****** 配置BDTR寄存器，配置死区时间****************/19     /*20        定时器时钟 72M   TIM_ClockDivision = TIM_CKD_DIV1时,  Tdts = 13.89ns21        0 - 1.764us  用算法一22        1.778us - 3.505us  用算法二23        3.556us - 7.000us  用算法三 24        7.1117us - 14us    用算法四25        需要更长时间,使用TIM_ClockDivision分频26     */27     TIM1_BDTRInitStruct.TIM_OSSRState = TIM_OSSRState_Disable;28     TIM1_BDTRInitStruct.TIM_OSSIState = TIM_OSSIState_Disable;29     TIM1_BDTRInitStruct.TIM_LOCKLevel = TIM_LOCKLevel_OFF;30     TIM1_BDTRInitStruct.TIM_DeadTime = 205; //死区时间  72:1us 172:3us 205:5us31     TIM_BDTRConfig(TIM1,&TIM1_BDTRInitStruct);32  33 //    TIM1->BDTR |= 72;   //设置死区  注:上面那种方法也可以，这种快且简单34     35      /* PWM1 Mode configuration: Channel2 */36      TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;//PWM2模式37      TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //比较输出使能38      TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;//比较互补输出使能39      TIM_OCInitStructure.TIM_Pulse = CCR2_Val;   //比较值，即占空比40      TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;  //输出极性41      TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;//互补输出极性42      TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset;//指定空闲状态下的TIM输出比较的引脚状态。43      TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;//指定空闲状态下的TIM互补输出比较的引脚状态。44      TIM_OC2Init(TIM1, &TIM_OCInitStructure);   //初始化通道二比较输出45      TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Enable);      //配置通道二，自动重装载使能46 47 48     /* PWM1 Mode configuration: Channel3 */49     TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;50     TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;51     TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;52     TIM_OCInitStructure.TIM_Pulse = CCR3_Val;53     TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;54     TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;55     TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset;56     TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;      57     TIM_OC3Init(TIM1, &TIM_OCInitStructure);58     TIM_OC3PreloadConfig(TIM1, TIM_OCPreload_Enable);    59 60     TIM_ARRPreloadConfig(TIM1, ENABLE);//重载装载值 ENABLE 立即生效，DISABLE 下一个比较周期生效61 62     /* TIM1 enable counter */63     TIM_Cmd(TIM1, ENABLE);//使能定时器164     65     TIM_CtrlPWMOutputs(TIM1, ENABLE);//使能PWM外围输出    66 }