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楼主 |
发表于 2018-12-12 23:24:57
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void TIM1_PWM_Init(u32 arr,u32 psc)
{
//此部分需手动修改IO口设置
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1,ENABLE); //TIM1时钟使能
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOE, ENABLE); //使能PORTF时钟
GPIO_PinAFConfig(GPIOE,GPIO_PinSource9,GPIO_AF_TIM1); //GPIOF9复用为定时器1
GPIO_PinAFConfig(GPIOE,GPIO_PinSource11,GPIO_AF_TIM1); //GPIOF9复用为定时器1
GPIO_PinAFConfig(GPIOE,GPIO_PinSource13,GPIO_AF_TIM1); //GPIOF9复用为定时器1
GPIO_PinAFConfig(GPIOE,GPIO_PinSource14,GPIO_AF_TIM1); //GPIOF9复用为定时器1
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9|GPIO_Pin_11|GPIO_Pin_13|GPIO_Pin_14;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; //复用功能
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz; //速度100MHz
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //推挽复用输出
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; //上拉
GPIO_Init(GPIOE,&GPIO_InitStructure); //初始化PE9,11,13,14
TIM_TimeBaseStructure.TIM_Prescaler=psc; //定时器分频
TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up; //向上计数模式
TIM_TimeBaseStructure.TIM_Period=arr; //自动重装载值
TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1;
TIM_TimeBaseInit(TIM1,&TIM_TimeBaseStructure);//初始化定时器1
//初始化TIM1 Channel1 PWM模式
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //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_Low; //输出极性:TIM输出比较极性低
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset;
TIM_OC1Init(TIM1, &TIM_OCInitStructure); //根据T指定的参数初始化外设TIM1 4OC1
TIM_OC2Init(TIM1, &TIM_OCInitStructure);
TIM_OC3Init(TIM1, &TIM_OCInitStructure);
TIM_OC4Init(TIM1, &TIM_OCInitStructure);
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);
TIM_OC3PreloadConfig(TIM1, TIM_OCPreload_Enable);
TIM_OC4PreloadConfig(TIM1, TIM_OCPreload_Enable);
TIM_ARRPreloadConfig(TIM1,ENABLE);//ARPE使能
TIM_Cmd(TIM1, ENABLE); //使能TIM1
TIM_CtrlPWMOutputs(TIM1, ENABLE);
}
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