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发表于 2018-12-1 14:11:49
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/******************************************************* * 定时器1产生2路互补的PWM波（频率=pfreq / (psc+1)） * channel1 ,channel2 -->A.8, A.9,A.10 channel1N,channel2N-->B.13, B.14 B.15(互补) * TimerPeriod --> 自动重装载周期值 * ChannelxPulse --> 占空周期值 ******************************************************/ /******************************************************* * 定时器1产生2路互补的PWM波（频率=pfreq / (psc+1)） * channel1 ,channel2 -->A.8, A.9,A.10 channel1N,channel2N-->B.13, B.14 B.15(互补) * TimerPeriod --> 自动重装载周期值 * ChannelxPulse --> 占空周期值 ******************************************************/ void TIM1_PWM_Init(unsigned int pfreq,unsigned int psc) //pfreq为不分频时的PWM频率，psc为预分频值 { GPIO_InitTypeDef GPIO_InitStructure; TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_OCInitTypeDef TIM_OCInitStructure; //输出通道配置 TIM_BDTRInitTypeDef TIM_BDTRInitStructure; //死区和刹车配置 TimerPeriod = (SystemCoreClock / pfreq) - 1; //自动重装载周期值 /* ChannelxPulse = DutyCycle * (TIM1_Period - 1) / 100 */ Channel1Pulse = (u16)((u32)(50 * (TimerPeriod - 1)) / 100 ); //占空比50% Channel2Pulse = (u16)((u32)(50 * (TimerPeriod - 1)) / 100 ); //占空比50% Channel3Pulse = (u16)((u32)(50 * (TimerPeriod - 1)) / 100 ); //占空比50% /* 使能TIM1，GPIOA，GPIOB，GPIOE */ RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB|RCC_APB2Periph_GPIOE, ENABLE); /*channel1 ,channel2 -->A.8,A.9,A.10* *channel1N,channel2N-->B.13,B.14,B.15*/ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_10; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15; GPIO_Init(GPIOB, &GPIO_InitStructure); /* 初始化TIM1 */ TIM_TimeBaseStructure.TIM_Period = TimerPeriod; //设置重装载周期值 TIM_TimeBaseStructure.TIM_Prescaler = psc; //设置预分频值 TIM_TimeBaseStructure.TIM_ClockDivision = 0; //时钟分频因子，仅与输入捕获有关（定时器与滤波器的频率比） TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;//TIM向上计数模式 TIM_TimeBaseStructure.TIM_RepetitionCounter = 0; //重复溢出中断 TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure); //初始化定时器基本配置 /* Channel_1 TIM_OCMode_PWM1模式 */ TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //在向上计数时，一旦TIMx_CNT<TIMx_CCR1时通道1为有效电平 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //比较输出使能 TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable; //PWM互补输出使能 TIM_OCInitStructure.TIM_Pulse = Channel1Pulse; //占空比 = TIM_Pulse/TIM_Period; TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //有效电平为高电平 TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High; //互补PWM极性 TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set; //输出空闲状态 TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset; //PWM互补输出空闲状态 TIM_OC1Init(TIM1, &TIM_OCInitStructure); //根据指定的参数初始化外设TIM1 OC1 /* Channel_2 TIM_OCMode_PWM1模式 */ TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //在向上计数时，一旦TIMx_CNT>TIMx_CCR1时通道1为有效电平 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //比较输出使能 TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable; //PWM互补输出使能 TIM_OCInitStructure.TIM_Pulse = Channel2Pulse; //占空比 = TIM_Pulse/TIM_Period; TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //有效电平为高电平 TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High; //互补PWM极性 TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set; //输出空闲状态 TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset; //PWM互补输出空闲状态 TIM_OC2Init(TIM1, &TIM_OCInitStructure); //根据指定的参数初始化外设TIM1 OC2 /* Channel_3 TIM_OCMode_PWM1模式 */ TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //在向上计数时，一旦TIMx_CNT>TIMx_CCR1时通道1为有效电平 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //比较输出使能 TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable; //PWM互补输出使能 TIM_OCInitStructure.TIM_Pulse = Channel3Pulse; //占空比 = TIM_Pulse/TIM_Period; TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //有效电平为高电平 TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High; //互补PWM极性 TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set; //输出空闲状态 TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset; //PWM互补输出空闲状态 TIM_OC3Init(TIM1, &TIM_OCInitStructure); //根据指定的参数初始化外设TIM1 OC3 TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable); //使能TIM3在CCR1上的预装载寄存器 TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Enable); //使能TIM3在CCR2上的预装载寄存器 TIM_OC3PreloadConfig(TIM1, TIM_OCPreload_Enable); //使能TIM3在CCR2上的预装载寄存器 /*死区和刹车功能配置*/ TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable; TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable; TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_1; TIM_BDTRInitStructure.TIM_DeadTime = 0x2F; //设置TIM1_BDTR的DTG[7:0] TIM_BDTRInitStructure.TIM_Break = TIM_Break_Disable; TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High; TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable; TIM_BDTRConfig(TIM1, &TIM_BDTRInitStructure); TIM_Cmd(TIM1, ENABLE); //使能TIM1 TIM_CtrlPWMOutputs(TIM1,ENABLE); //PWM输出使能 } /******************************************************* * 定时器8产生2路互补的PWM波（频率=pfreq / (psc+1)） * channel1 ,channel2 -->C.6, C.7,C.8 channel1N,channel2N-->A.7, B.0,B.1 (互补) * TimerPeriod --> 自动重装载周期值 * ChannelxPulse --> 占空周期值 ******************************************************/ void TIM8_PWM_Init(unsigned int pfreq ,unsigned int psc) //pfreq为不分频时的PWM频率，psc为预分频值 { GPIO_InitTypeDef GPIO_InitStructure; TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_OCInitTypeDef TIM_OCInitStructure; //输出通道配置 TIM_BDTRInitTypeDef TIM_BDTRInitStructure; //死区和刹车配置 TimerPeriod1 = (SystemCoreClock / pfreq) - 1; //自动重装载周期值 /* ChannelxPulse = DutyCycle * (TIM8_Period - 1) / 100 */ Channe8_1Pulse = (unsigned int)((unsigned short int)(50 * (TimerPeriod - 1)) / 100 ); //占空比50% Channe8_2Pulse = (unsigned int)((unsigned short int)(50 * (TimerPeriod - 1)) / 100 ); //占空比50% Channe8_3Pulse = (unsigned int)((unsigned short int)(50 * (TimerPeriod - 1)) / 100 ); //占空比50% /* 使能TIM1，GPIOA，GPIOB，GPIOE */ RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM8, ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB|RCC_APB2Periph_GPIOC, ENABLE); /* channel1 ,channel2 -->C.6, C.7,C.8 channel1N,channel2N-->A.7, B.0,B.1 (互补)*/ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOC, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1; GPIO_Init(GPIOB, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7; GPIO_Init(GPIOA, &GPIO_InitStructure); /* 初始化TIM1 */ TIM_TimeBaseStructure.TIM_Period = TimerPeriod1; //设置重装载周期值 TIM_TimeBaseStructure.TIM_Prescaler = psc; //设置预分频值 TIM_TimeBaseStructure.TIM_ClockDivision = 0; //时钟分频因子，仅与输入捕获有关（定时器与滤波器的频率比） TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;//TIM向上计数模式 TIM_TimeBaseStructure.TIM_RepetitionCounter = 0; //重复溢出中断 TIM_TimeBaseInit(TIM8, &TIM_TimeBaseStructure); //初始化定时器基本配置 /* Channel_1 TIM_OCMode_PWM1模式 */ TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //在向上计数时，一旦TIMx_CNT<TIMx_CCR1时通道1为有效电平 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //比较输出使能 TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable; //PWM互补输出使能 TIM_OCInitStructure.TIM_Pulse = Channe8_1Pulse; //占空比 = TIM_Pulse/TIM_Period; TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //有效电平为高电平 TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High; //互补PWM极性 TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set; //输出空闲状态 TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset; //PWM互补输出空闲状态 TIM_OC1Init(TIM8, &TIM_OCInitStructure); //根据指定的参数初始化外设TIM1 OC1 /* Channel_2 TIM_OCMode_PWM1模式 */ TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //在向上计数时，一旦TIMx_CNT>TIMx_CCR1时通道1为有效电平 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //比较输出使能 TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable; //PWM互补输出使能 TIM_OCInitStructure.TIM_Pulse = Channe8_2Pulse; //占空比 = TIM_Pulse/TIM_Period; TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //有效电平为高电平 TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High; //互补PWM极性 TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set; //输出空闲状态 TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset; //PWM互补输出空闲状态 TIM_OC2Init(TIM8, &TIM_OCInitStructure); //根据指定的参数初始化外设TIM1 OC2 /* Channel_3 TIM_OCMode_PWM1模式 */ TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //在向上计数时，一旦TIMx_CNT>TIMx_CCR1时通道1为有效电平 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //比较输出使能 TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable; //PWM互补输出使能 TIM_OCInitStructure.TIM_Pulse = Channe8_3Pulse; //占空比 = TIM_Pulse/TIM_Period; TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //有效电平为高电平 TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High; //互补PWM极性 TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set; //输出空闲状态 TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset; //PWM互补输出空闲状态 TIM_OC3Init(TIM8, &TIM_OCInitStructure); //根据指定的参数初始化外设TIM1 OC3 TIM_OC1PreloadConfig(TIM8, TIM_OCPreload_Enable); //使能TIM2在CCR1上的预装载寄存器 TIM_OC2PreloadConfig(TIM8, TIM_OCPreload_Enable); //使能TIM2在CCR2上的预装载寄存器 TIM_OC3PreloadConfig(TIM8, TIM_OCPreload_Enable); //使能TIM2在CCR2上的预装载寄存器 /*死区和刹车功能配置*/ TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable; TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable; TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_1; TIM_BDTRInitStructure.TIM_DeadTime = 0x2F; //设置TIM1_BDTR的DTG[7:0] TIM_BDTRInitStructure.TIM_Break = TIM_Break_Disable; TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High; TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable; TIM_BDTRConfig(TIM8, &TIM_BDTRInitStructure); TIM_Cmd(TIM8, ENABLE); //使能TIM1 TIM_CtrlPWMOutputs(TIM8,ENABLE); //PWM输出使能 } |
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