STM32学习笔记6（TIM模块定时器）

//TIM1_OC1模块设置TIM_OCStructInit(& TIM_OCInitStructure);TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Toggle;//管脚输出模式：翻转TIM_OCInitStructure.TIM_Pulse = 2000;//翻转周期：2000个脉冲TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;//使能TIM1_CH1通道TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;//输出为正逻辑TIM_OC1Init(TIM1, &TIM_OCInitStructure);//写入配置

//清中断TIM_ClearFlag(TIM1, TIM_FLAG_CC1);

//TIM1中断源设置，开启相应通道的捕捉比较中断TIM_ITConfig(TIM1, TIM_IT_CC1, ENABLE);

//TIM1开启TIM_Cmd(TIM1, ENABLE);//通道输出使能TIM_CtrlPWMOutputs(TIM1, ENABLE);}

Step5.中断服务子程序void TIM1_CC_IRQHandler(void){u16 capture;if(TIM_GetITStatus(TIM1, TIM_IT_CC1) == SET){TIM_ClearITPendingBit(TIM1, TIM_IT_CC1 );capture = TIM_GetCapture1(TIM1);TIM_SetCompare1(TIM1, capture + 2000);//这里解释下://将TIM1_CCR1的值增加2000，使得下一个TIM事件也需要2000个脉冲，//另一种方式是清零脉冲计数器//TIM_SetCounter(TIM2,0x0000);}}

关于TIM的操作，要注意的是STM32处理器因为低功耗的需要，各模块需要分别独立开启时钟，所以，一定不要忘记给用到的模块和管脚使能时钟，因为这个原因，浪费了我好多时间阿~~！

九九的STM32笔记（二）TIM模块产生PWM

这个是STM32的PWM输出模式，STM32的TIM1模块是增强型的定时器模块，天生就是为电机控制而生，可以产生3组6路PWM，同时每组2路PWM为互补，并可以带有死区，可以用来驱动H桥。下面的代码，是利用TIM1模块的1、2通道产生一共4路PWM的代码例子，类似代码也可以参考ST的固件库中相应exampleC语言: TIM1模块产生PWM，带死区//Step1.开启TIM和相应端口时钟//启动GPIORCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOC | RCC_APB2Periph_GPIOD,ENABLE);//启动AFIORCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);//启动TIM1RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);

//Step2. GPIO做相应设置，为AF输出//PA.8/9口设置为TIM1的OC1输出口GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;GPIO_Init(GPIOA, &GPIO_InitStructure);

//PB.13/14口设置为TIM1_CH1N和TIM1_CH2N输出口GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_14;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;GPIO_Init(GPIOB, &GPIO_InitStructure);

//Step3. TIM模块初始化void TIM_Configuration(void){TIM_TimeBaseInitTypeDef TIM_BaseInitStructure;TIM_OCInitTypeDef TIM_OCInitStructure;TIM_BDTRInitTypeDef TIM_BDTRInitStructure;

//TIM1基本计数器设置（设置PWM频率）//频率=TIM1_CLK/(ARR+1)TIM_BaseInitStructure.TIM_Period = 1000-1;TIM_BaseInitStructure.TIM_Prescaler = 72-1;TIM_BaseInitStructure.TIM_ClockDivision = 0;TIM_BaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;TIM_BaseInitStructure.TIM_RepetitionCounter = 0;TIM_TimeBaseInit(TIM1, &TIM_BaseInitStructure);//启用ARR的影子寄存器（直到产生更新事件才更改设置）TIM_ARRPreloadConfig(TIM1, ENABLE);

//TIM1_OC1模块设置（设置1通道占空比）TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;TIM_OCInitStructure.TIM_Pulse = 120;TIM_OC1Init(TIM1, &TIM_OCInitStructure);//启用CCR1寄存器的影子寄存器（直到产生更新事件才更改设置）TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);

//TIM2_OC2模块设置（设置2通道占空比）TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;TIM_OCInitStructure.TIM_Pulse = 680;TIM_OC2Init(TIM1, &TIM_OCInitStructure);//启用CCR2寄存器的影子寄存器（直到