定时器5和8为什么不能输出pwm波

___heima__ · 发表于 2015-8-8 22:02:17

我是模仿定时器2和1改的程序，调试无错，可是定时器5和8经过软件仿真输出全为0，请问这是为什么，求各路大神指教

[mw_shl_code=c,true]void TIM5_Init(u16 arr,u16 psc) { GPIO_InitTypeDef GPIO_InitStructure; TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_OCInitTypeDef TIM_OCInitStructure; RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM5, ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA , ENABLE); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0; //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_InitStructure.GPIO_Pin = GPIO_Pin_1; //TIM_CH2 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_InitStructure.GPIO_Pin = GPIO_Pin_2; //TIM_CH3 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_InitStructure.GPIO_Pin = GPIO_Pin_3; //TIM_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); 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(TIM5, &TIM_TimeBaseStructure); //根据TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位 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_Pulse = 0; //设置待装入捕获比较寄存器的脉冲值 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; //输出极性:TIM输出比较极性高 TIM_OC1Init(TIM5, &TIM_OCInitStructure); TIM_OC1PreloadConfig(TIM5, TIM_OCPreload_Enable); //使能TIMx在CCR1上的预装载寄存器 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_Pulse = 0; //设置待装入捕获比较寄存器的脉冲值 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; //输出极性:TIM输出比较极性高 TIM_OC2Init(TIM5, &TIM_OCInitStructure); TIM_OC2PreloadConfig(TIM5, TIM_OCPreload_Enable); //使能TIMx在CCR2上的预装载寄存器 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_Pulse = 0; //设置待装入捕获比较寄存器的脉冲值 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; //输出极性:TIM输出比较极性高 TIM_OC3Init(TIM5, &TIM_OCInitStructure); TIM_OC3PreloadConfig(TIM5, TIM_OCPreload_Enable); //使能TIMx在CCR3上的预装载寄存器 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_Pulse = 0; //设置待装入捕获比较寄存器的脉冲值 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; //输出极性:TIM输出比较极性高 TIM_OC4Init(TIM5, &TIM_OCInitStructure); TIM_OC4PreloadConfig(TIM5, TIM_OCPreload_Enable); //使能TIMx在CCR4上的预装载寄存器 TIM_ARRPreloadConfig(TIM5, ENABLE); //使能TIMx在ARR上的预装载寄存器 TIM_Cmd(TIM5, ENABLE); //使能TIMx外设 } void TIM8_Init(u16 arr,u16 psc) //Advanced TIM { GPIO_InitTypeDef GPIO_InitStructure; TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_OCInitTypeDef TIM_OCInitStructure; TIM_BDTRInitTypeDef TIM_BDTRInitStructure; // RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE); RCC_APB2PeriphClockCmd( RCC_APB2Periph_TIM8, ENABLE); //RCC_APB2Periph_TIM1 in RCC_APB2ENR RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO |RCC_APB2Periph_GPIOC , ENABLE); // RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); //使能PA端口时钟 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6; //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(GPIOC, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7; //TIM_CH2 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOC, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8; //TIM_CH3 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOC, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; //TIM_CH4 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOC, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13; //TIM_CH1N GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOC, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_14; //TIM_CH2N 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_15; //TIM_CH3N 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); 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(TIM8, &TIM_TimeBaseStructure); //根据TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位 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_OutputNState = TIM_OutputNState_Enable; //比较输出使能 TIM_OCInitStructure.TIM_Pulse = 0; //设置待装入捕获比较寄存器的脉冲值 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; //输出极性:TIM输出比较极性高 TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High; //输出极性:TIM输出比较极性高 TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set; TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset; TIM_OC1Init(TIM8, &TIM_OCInitStructure); TIM_OC1PreloadConfig(TIM8, TIM_OCPreload_Enable); //使能TIMx在CCR1上的预装载寄存器 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_OutputNState = TIM_OutputNState_Enable; //比较输出使能 TIM_OCInitStructure.TIM_Pulse = 0; //设置待装入捕获比较寄存器的脉冲值 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; //输出极性:TIM输出比较极性高 TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High; //输出极性:TIM输出比较极性高 TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set; TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset; TIM_OC2Init(TIM8, &TIM_OCInitStructure); TIM_OC2PreloadConfig(TIM8, TIM_OCPreload_Enable); //使能TIMx在CCR2上的预装载寄存器 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_OutputNState = TIM_OutputNState_Enable; //比较输出使能 TIM_OCInitStructure.TIM_Pulse = 0; //设置待装入捕获比较寄存器的脉冲值 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; //输出极性:TIM输出比较极性高 TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High; //输出极性:TIM输出比较极性高 TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set; TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset; TIM_OC3Init(TIM8, &TIM_OCInitStructure); TIM_OC3PreloadConfig(TIM8, TIM_OCPreload_Enable); //使能TIMx在CCR3上的预装载寄存器 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_OutputNState = TIM_OutputNState_Enable; //比较输出使能 TIM_OCInitStructure.TIM_Pulse = 0; //设置待装入捕获比较寄存器的脉冲值 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; //输出极性:TIM输出比较极性高 TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High; //输出极性:TIM输出比较极性高 TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set; TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset; TIM_OC4Init(TIM8, &TIM_OCInitStructure); TIM_OC4PreloadConfig(TIM8, TIM_OCPreload_Enable); //使能TIMx在CCR4上的预装载寄存器 TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable; TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable; TIM_BDTRConfig(TIM8, &TIM_BDTRInitStructure); /* assert_param(IS_TIM_OSSR_STATE(TIM_BDTRInitStruct->TIM_OSSRState)); assert_param(IS_TIM_OSSI_STATE(TIM_BDTRInitStruct->TIM_OSSIState)); assert_param(IS_TIM_LOCK_LEVEL(TIM_BDTRInitStruct->TIM_LOCKLevel)); assert_param(IS_TIM_BREAK_STATE(TIM_BDTRInitStruct->TIM_Break)); assert_param(IS_TIM_BREAK_POLARITY(TIM_BDTRInitStruct->TIM_BreakPolarity)); assert_param(IS_TIM_AUTOMATIC_OUTPUT_STATE(TIM_BDTRInitStruct->TIM_AutomaticOutput)); */ TIM_ARRPreloadConfig(TIM8, ENABLE); //使能TIMx在ARR上的预装载寄存器 TIM_Cmd(TIM8, ENABLE); //使能TIMx外设 TIM_CtrlPWMOutputs(TIM8, ENABLE); //pwm输出使能，一定要记得打开 }[/mw_shl_code]