TIM8和TIM3冲突

影腾 · 发表于 2015-10-10 14:25:58

[mw_shl_code=c,true]#include "timer.h" #include "led.h" #include "usart.h" //******************************************************************************** //V1.1 20120904 //1,增加TIM3_PWM_Init函数。 //2,增加LED0_PWM_VAL宏定义，控制TIM3_CH1脉宽 ////////////////////////////////////////////////////////////////////////////////// //通用定时器3中断初始化 //这里时钟选择为APB1的2倍，而APB1为36M //arr：自动重装值。 //psc：时钟预分频数 //这里使用的是定时器3! //void TIM3_Int_Init(u16 arr,u16 psc) //{ // TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; // NVIC_InitTypeDef NVIC_InitStructure; // RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); //时钟使能 // 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计数到5000为500ms // TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置用来作为TIMx时钟频率除数的预分频值 10Khz的计数频率 // 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(TIM3, &TIM_TimeBaseStructure); //根据TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位 // // TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE ); //使能指定的TIM3中断,允许更新中断 // NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn; //TIM3中断 // NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //先占优先级0级 // NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; //从优先级3级 // NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道被使能 // NVIC_Init(&NVIC_InitStructure); //根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器 // TIM_Cmd(TIM3, ENABLE); //使能TIMx外设 // //} //定时器3中断服务程序 //void TIM3_IRQHandler(void) //TIM3中断 //{ // if (TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET) //检查指定的TIM中断发生与否:TIM 中断源 // { // TIM_ClearITPendingBit(TIM3, TIM_IT_Update ); //清除TIMx的中断待处理位:TIM 中断源 // LED1=!LED1; // } //} //TIM3 PWM部分初始化 //PWM输出初始化 //arr：自动重装值 //psc：时钟预分频数 void TIM3_PWM_Init(u16 arr,u16 psc) { GPIO_InitTypeDef GPIO_InitStructure; TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_OCInitTypeDef TIM_OCInitStructure; RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); //使能定时器3时钟 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA , ENABLE); //使能GPIO外设和AFIO复用功能模块时钟 //设置该引脚为复用输出功能,输出TIM3 CH1的PWM脉冲波形 GPIOA.6 |GPIOA.7 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6|GPIO_Pin_7; //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);//初始化GPIO //初始化TIM3 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 TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置用来作为TIMx时钟频率除数的预分频值 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(TIM3, &TIM_TimeBaseStructure); //根据TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位 //初始化TIM3 Channel2 PWM模式 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_OutputState = TIM_OutputState_Enable; //比较输出使能 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //输出极性:TIM输出比较极性高 TIM_OC1Init(TIM3, &TIM_OCInitStructure); //根据T指定的参数初始化外设TIM3 OC1 TIM_OC2Init(TIM3, &TIM_OCInitStructure); //根据T指定的参数初始化外设TIM3 OC1 TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable); //使能TIM3在CCR1上的预装载寄存器 TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Enable); //使能TIM3在CCR2上的预装载寄存器 TIM_Cmd(TIM3, ENABLE); //使能TIM3 } void TIM4_PWM_Init(u16 arr,u16 psc) { GPIO_InitTypeDef GPIO_InitStructure; TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_OCInitTypeDef TIM_OCInitStructure; RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE); //使能定时器4时钟 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB , ENABLE); //使能GPIO外设和AFIO复用功能模块时钟 //设置该引脚为复用输出功能,输出TIM4 CH1~CH2的PWM脉冲波形 GPIOB.6 |GPIOB.7 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6|GPIO_Pin_7; //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);//初始化GPIO //初始化TIM4 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 TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置用来作为TIMx时钟频率除数的预分频值 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(TIM4, &TIM_TimeBaseStructure); //根据TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位 //初始化TIM4 Channel2 PWM模式 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_OutputState = TIM_OutputState_Enable; //比较输出使能 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //输出极性:TIM输出比较极性高 TIM_OC1Init(TIM4, &TIM_OCInitStructure); //根据T指定的参数初始化外设TIM3 OC1 TIM_OC2Init(TIM4, &TIM_OCInitStructure); //根据T指定的参数初始化外设TIM3 OC1 TIM_OC1PreloadConfig(TIM4, TIM_OCPreload_Enable); //使能TIM3在CCR1上的预装载寄存器 TIM_OC2PreloadConfig(TIM4, TIM_OCPreload_Enable); //使能TIM3在CCR2上的预装载寄存器 TIM_Cmd(TIM4, ENABLE); //使能TIM3 } //TIM1 PWM部分初始化 //PWM输出初始化 //arr：自动重装值 //psc：时钟预分频数 void TIM1_PWM_Init(u16 arr,u16 psc) { GPIO_InitTypeDef GPIO_InitStructure; TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_OCInitTypeDef TIM_OCInitStructure; TIM_BDTRInitTypeDef TIM_BDTRInitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE); //使能定时器1时钟 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB , ENABLE); //使能GPIO外设和AFIO复用功能模块时钟 //设置该引脚为复用输出功能,输出TIM1 CH1~CH3的PWM脉冲波形 GPIOB.13 | GPIOB.14 | GPIOB.15 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15; //TIM1_CH1 TIM1_CH2 TIM1_CH3 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);//初始化GPIO //设置该引脚为复用输出功能,输出TIM1 CH4的PWM脉冲波形 GPIOA.11 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11; //TIM1_CH4 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);//初始化GPIO //初始化TIM1 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 TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置用来作为TIMx时钟频率除数的预分频值 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 //初始化TIM1 Channel2 PWM模式 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_OutputState = TIM_OutputState_Enable; //比较输出使能 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //输出极性:TIM输出比较极性高 //下面几个函数只有高级定时器用 TIM_OCInitStructure.TIM_OCNPolarity=TIM_OCNPolarity_Low; //设置互补断输出极性 TIM_OCInitStructure.TIM_OutputNState=TIM_OutputNState_Enable;//使能互补输出端 TIM_OCInitStructure.TIM_OCIdleState=TIM_OCIdleState_Reset; //死去后输出状态 TIM_OCInitStructure.TIM_OCNIdleState=TIM_OCNIdleState_Reset;//死去后互补端输出状态 TIM_OC1Init(TIM1, &TIM_OCInitStructure); //根据T指定的参数初始化外设TIM1 OC1 TIM_OC2Init(TIM1, &TIM_OCInitStructure); //根据T指定的参数初始化外设TIM1 OC2 TIM_OC3Init(TIM1, &TIM_OCInitStructure); //根据T指定的参数初始化外设TIM1 OC3 TIM_OC4Init(TIM1, &TIM_OCInitStructure); //根据T指定的参数初始化外设TIM1 OC4 TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable); //使能TIM1在CCR1上的预装载寄存器 TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Enable); //使能TIM1在CCR2上的预装载寄存器 TIM_OC3PreloadConfig(TIM1, TIM_OCPreload_Enable); //使能TIM1在CCR3上的预装载寄存器 TIM_OC4PreloadConfig(TIM1, TIM_OCPreload_Enable); //使能TIM1在CCR4上的预装载寄存器 //死区和刹车功能配置，高级定时器才有的，通用定时器不用配置 TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Disable;//运行模式下输出选择 TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Disable;//空闲模式下输出选择 TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_OFF; //锁定设置 TIM_BDTRInitStructure.TIM_DeadTime = 0X90; //死区时间设置 TIM_BDTRInitStructure.TIM_Break = TIM_Break_Enable; //刹车功能使能 TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_Low;//刹车输入极性 TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable;//自动输出使能 TIM_BDTRConfig(TIM1,&TIM_BDTRInitStructure); TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable); //使能TIMx在CCR1上的预装载寄存器 TIM_ARRPreloadConfig(TIM1, ENABLE); //使能ARR预装载缓冲器 TIM_Cmd(TIM1,ENABLE); //打开TIM2 TIM_CtrlPWMOutputs(TIM1, ENABLE); //pwm输出使能，一定要记得打开 TIM_Cmd(TIM1, ENABLE); //使能TIM1 } //TIM8 PWM部分初始化 //PWM输出初始化 //arr：自动重装值 //psc：时钟预分频数 void TIM8_PWM_Init(u16 arr,u16 psc) { GPIO_InitTypeDef GPIO_InitStructure; TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_OCInitTypeDef TIM_OCInitStructure; TIM_BDTRInitTypeDef TIM_BDTRInitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM8, ENABLE); //使能定时器1时钟 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB , ENABLE); //使能GPIO外设和AFIO复用功能模块时钟 //设置该引脚为复用输出功能,输出TIM8 CH1~CH3的PWM脉冲波形 GPIOB.0 | GPIOB.1 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1; //TIM8_CH2 TIM8_CH3 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);//初始化GPIO //初始化TIM8 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 TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置用来作为TIMx时钟频率除数的预分频值 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(TIM8, &TIM_TimeBaseStructure); //根据TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位 //初始化TIM8 Channel2 PWM模式 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_OutputState = TIM_OutputState_Enable; //比较输出使能 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //输出极性:TIM输出比较极性高 //下面几个函数只有高级定时器用 TIM_OCInitStructure.TIM_OCNPolarity=TIM_OCNPolarity_Low; //设置互补断输出极性 TIM_OCInitStructure.TIM_OutputNState=TIM_OutputNState_Enable;//使能互补输出端 TIM_OCInitStructure.TIM_OCIdleState=TIM_OCIdleState_Reset; //死去后输出状态 TIM_OCInitStructure.TIM_OCNIdleState=TIM_OCNIdleState_Reset;//死去后互补端输出状态 TIM_OC2Init(TIM8, &TIM_OCInitStructure); //根据T指定的参数初始化外设TIM8 OC2 TIM_OC3Init(TIM8, &TIM_OCInitStructure); //根据T指定的参数初始化外设TIM8 OC3 TIM_OC2PreloadConfig(TIM8, TIM_OCPreload_Enable); //使能TIM8在CCR2上的预装载寄存器 TIM_OC3PreloadConfig(TIM8, TIM_OCPreload_Enable); //使能TIM8在CCR3上的预装载寄存器 //死区和刹车功能配置，高级定时器才有的，通用定时器不用配置 TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Disable;//运行模式下输出选择 TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Disable;//空闲模式下输出选择 TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_OFF; //锁定设置 TIM_BDTRInitStructure.TIM_DeadTime = 0X90; //死区时间设置 TIM_BDTRInitStructure.TIM_Break = TIM_Break_Enable; //刹车功能使能 TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_Low;//刹车输入极性 TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable;//自动输出使能 TIM_BDTRConfig(TIM8,&TIM_BDTRInitStructure); TIM_ARRPreloadConfig(TIM8, ENABLE); //使能ARR预装载缓冲器 TIM_Cmd(TIM8,ENABLE); //打开TIM8 TIM_CtrlPWMOutputs(TIM8, ENABLE); //pwm输出使能，一定要记得打开 TIM_Cmd(TIM8, ENABLE); //使能TIM8 } [/mw_shl_code]

我用到了TIM3 CH1 CH2 还有TIM8 CH2 CH3 TIM8和TIM3进行了同样的配置，为什么TIM3能输出PWM，而TIM8没有，当单独使用TIM8的时候，TIM8会输出PWM