GPIO_InitTypeDef GPIO_InitStructure; TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_OCInitTypeDef TIM_OCInitStructure; TIM_BDTRInitTypeDef TIM1_BDTRInitStruct; RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);// RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB|RCC_APB2Periph_GPIOA , ENABLE); //使能GPIO外设时钟使能 //RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO , ENABLE); //复用引脚 //设置该引脚为复用输出功能,输出TIM1 CH1的PWM脉冲波形 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15; //TIM_CH1 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOB, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; //TIM_CH1 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOA, &GPIO_InitStructure); //GPIO_PinRemapConfig(GPIO_PartialRemap_TIM1,ENABLE); TIM_TimeBaseStructure.TIM_Period = arr; //设置在下一个更新事件装入活动的自动重装载寄存器周期的值 80K TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置用来作为TIMx时钟频率除数的预分频值 不分频 TIM_TimeBaseStructure.TIM_ClockDivision = 0; //设置时钟分割:TDTS = Tck_tim TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM向上计数模式 TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure); //根据TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位 ///****** 配置BDTR寄存器，配置死区时间****************/ ///* //20 定时器时钟 72M TIM_ClockDivision = TIM_CKD_DIV1时, Tdts = 13.89ns //21 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 */ // TIM1_BDTRInitStruct.TIM_OSSRState = TIM_OSSRState_Disable; // TIM1_BDTRInitStruct.TIM_OSSIState = TIM_OSSIState_Disable; // TIM1_BDTRInitStruct.TIM_LOCKLevel = TIM_LOCKLevel_OFF; // TIM1_BDTRInitStruct.TIM_DeadTime = 205; //死区时间 72:1us 172:3us 205:5us // TIM_BDTRConfig(TIM1,&TIM1_BDTRInitStruct); TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; //选择定时器模式:TIM脉冲宽度调制模式2 TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable; //比较输出使能 N TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; TIM_OCInitStructure.TIM_Pulse = 400; //设置待装入捕获比较寄存器的脉冲值 TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_Low; //输出极性:TIM输出比较极性高 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCNPolarity_Low; TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset ; TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset ; TIM_OC3Init(TIM1, &TIM_OCInitStructure); //根据TIM_OCInitStruct中指定的参数初始化外设TIMx TIM_CtrlPWMOutputs(TIM1,ENABLE); //MOE 主输出使能 //TIM_SetCompare4(TIM8,700); TIM_OC3PreloadConfig(TIM1, TIM_OCPreload_Enable); //CH1预装载使能 TIM_ARRPreloadConfig(TIM1, ENABLE); //使能TIMx在ARR上的预装载寄存器 TIM_Cmd(TIM1, ENABLE); //使能TIM1
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