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- 积分
- 42
- 金钱
- 42
- 注册时间
- 2019-7-26
- 在线时间
- 9 小时
|
1金钱
这是我的程序源码
- void TIM1_PWM_Init(u16 arr,u16 psc)
- {
- GPIO_InitTypeDef GPIO_InitStructure;
- TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
- TIM_OCInitTypeDef TIM_OCInitStructure;
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- RCC_APB1PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE); //使能定时器1时钟
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOE | RCC_APB2Periph_AFIO, ENABLE); //使能GPIO外设和AFIO复用功能模块时钟
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- GPIO_PinRemapConfig(GPIO_FullRemap_TIM1, ENABLE); //Timer3部分重映射
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- //设置该引脚为复用输出功能,输出TIM3 CH2的PWM脉冲波形 GPIOB.5
- GPIO_InitStructure.GPIO_Pin =GPIO_Pin_9|GPIO_Pin_11|GPIO_Pin_13|GPIO_Pin_14; //TIM1_CH1.2.3.4
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_Init(GPIOE, &GPIO_InitStructure);//初始化GPIOE
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- //初始化TIM1
- 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
- TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置用来作为TIMx时钟频率除数的预分频值
- 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TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位
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- //初始化TIM1 Channel2 PWM模式
- 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_OCPolarity = TIM_OCPolarity_High; //输出极性:TIM输出比较极性高
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- TIM_OC1Init(TIM1, &TIM_OCInitStructure); //根据T指定的参数初始化外设TIM3 OC1.2.3.4
- TIM_OC2Init(TIM1, &TIM_OCInitStructure);
- TIM_OC3Init(TIM1, &TIM_OCInitStructure);
- TIM_OC4Init(TIM1, &TIM_OCInitStructure);
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- TIM_CtrlPWMOutputs(TIM1,ENABLE); //高级定时器配置输出模式
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- TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable); //使能TIM1在CCR2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);
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- TIM_ARRPreloadConfig(TIM1, ENABLE); //使能 TIMx 在 ARR 上的预装载寄存器
- TIM_Cmd(TIM1, ENABLE); //使能TIM1
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- }
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