STM32 TIM1 PWM

ID:571940 · 发表于 2019-6-25 21:27

GPIO_InitTypeDef GPIO_InitStructure2;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
TIM_BDTRInitTypeDef TIM_BDTRInitStructure;
//第一步：配置时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB|RCC_APB2Periph_TIM1,ENABLE);
//第二步，配置goio口
GPIO_InitStructure2.GPIO_Pin=GPIO_Pin_8;
GPIO_InitStructure2.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_InitStructure2.GPIO_Mode=GPIO_Mode_AF_PP;                //设置为复用浮空输出
GPIO_Init(GPIOA,&GPIO_InitStructure2);


GPIO_InitStructure2.GPIO_Pin=GPIO_Pin_13;
GPIO_InitStructure2.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_InitStructure2.GPIO_Mode=GPIO_Mode_AF_PP;                //设置为复用浮空输出
GPIO_Init(GPIOB,&GPIO_InitStructure2);

//第三步，定时器基本配置
TIM_TimeBaseStructure.TIM_Period=1000-1;                // 自动重装载寄存器的值
TIM_TimeBaseStructure.TIM_Prescaler=72-1;                // 时钟预分频数
TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1;    // 采样分频
TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up;  //向上计数
TIM_TimeBaseStructure.TIM_RepetitionCounter=0;    //重复寄存器，用于自动更新pwm占空比
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);

//第四步pwm输出配置
TIM_OCInitStructure.TIM_OCMode=TIM_OCMode_PWM2;                   //设置为pwm1输出模式
TIM_OCInitStructure.TIM_Pulse=500;                               //设置占空比时间
TIM_OCInitStructure.TIM_OCPolarity=TIM_OCPolarity_Low;          //设置输出极性
TIM_OCInitStructure.TIM_OutputState=TIM_OutputState_Enable;       //使能该通道输出

//下面几个参数是高级定时器才会用到，通用定时器不用配置
TIM_OCInitStructure.TIM_OCNPolarity=TIM_OCNPolarity_High;       //设置互补端输出极性
TIM_OCInitStructure.TIM_OutputNState=TIM_OutputNState_Enable;//使能互补端输出
TIM_OCInitStructure.TIM_OCIdleState=TIM_OCIdleState_Reset;       //死区后输出状态
TIM_OCInitStructure.TIM_OCNIdleState=TIM_OCNIdleState_Reset;//死区后互补端输出状态
TIM_OC1Init(TIM1,&TIM_OCInitStructure);                                           //按照指定参数初始化

//第五步，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
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_Disable;                //刹车功能使能
TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High;//刹车输入极性
TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable;//自动输出使能
TIM_BDTRConfig(TIM1,&TIM_BDTRInitStructure);

//第六步，使能端的打开
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TIMx在ARR上的预装载寄存器
TIM_Cmd(TIM1,ENABLE);                            //打开TIM2

//下面这句是高级定时器才有的，输出pwm必须打开
TIM_CtrlPWMOutputs(TIM1, ENABLE);                                  //pwm输出使能，一定要记得打开

// 在运行当中想要改变pwm的频率和占空比调用：
TIM_SetAutoreload(TIM1,1000);
TIM_SetCompare1(TIM1,500);

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