void TIM1_PWM1_Init(u16 arr,u16 psc)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE); //使能TIMx外设
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); //使能GPIOA外设时钟使能
//设置该引脚为复用输出功能,输出TIM1 CH1的PWM脉冲波形
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8; //TIM1_CH1
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用功能输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure); //初始化GPIO
TIM_TimeBaseStructure.TIM_Period = arr; //设置自动重装载周期值
TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置预分频值 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(TIM1, &TIM_TimeBaseStructure); //根据指定的参数初始化TIMx
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; //CH1 PWM2模式
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; //OC1 低电平有效
TIM_OC1Init(TIM1, &TIM_OCInitStructure); //根据指定的参数初始化外设TIMx
TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable); //CH1 预装载使能
TIM_ARRPreloadConfig(TIM1, ENABLE); //使能TIMx在ARR上的预装载寄存器
TIM_CtrlPWMOutputs(TIM1,ENABLE); //MOE 主输出使能,高级定时器必须开启这个
TIM_Cmd(TIM1, ENABLE); //使能TIMx
}
void TIM1_PWM2_Init(u16 arr,u16 psc)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE); //使能TIMx外设
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE); //使能GPIOB外设时钟使能
//设置该引脚为复用输出功能,输出TIM1 CH1的PWM脉冲波形
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_14; //TIM1_CH2
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用功能输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure); //初始化GPIO
TIM_TimeBaseStructure.TIM_Period = arr; //设置自动重装载周期值
TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置预分频值 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(TIM1, &TIM_TimeBaseStructure); //根据指定的参数初始化TIMx
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; //CH1 PWM2模式
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; //OC2 低电平有效
TIM_OC2Init(TIM1, &TIM_OCInitStructure); //根据指定的参数初始化外设TIMx
TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Enable); //CH2 预装载使能
TIM_ARRPreloadConfig(TIM1, ENABLE); //使能TIMx在ARR上的预装载寄存器
TIM_CtrlPWMOutputs(TIM1,ENABLE); //MOE 主输出使能,高级定时器必须开启这个
TIM_Cmd(TIM1, ENABLE); //使能TIMx
}
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