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STM32红外发射Timer1 ch1 PWM输出

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2018-10-15 16:53:45 2191 STM32 PWM输出红外发射

1 之前做红外发射，在网上都找不到现成的资料，现在自己做出来了，拿出来给有需要的人 void timer1_PWM_Init(void) { GPIO_InitTypeDef GPIO_InitStructure; TIM_TimeBaseInitTypeDef TIM_BaseInitStructure; TIM_OCInitTypeDef TIM_OCInitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA\|RCC_APB2Periph_AFIO,ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE); GPIO_InitStructure.GPIO_Pin=GPIO_Pin_8; GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP; GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz; GPIO_Init(GPIOA, &GPIO_InitStructure); //TIM1基本计数器设置（设置PWM频率） //频率=TIM1_CLK/(ARR+1) TIM_BaseInitStructure.TIM_Period = 1894; //不分频。PWM频率=72000/1894=38Khz TIM_BaseInitStructure.TIM_Prescaler = 0; 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_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); TIM_Cmd(TIM1, ENABLE); //TIM1开启 //TIM1_OC通道输出PWM（一定要加） TIM_CtrlPWMOutputs(TIM1, ENABLE); TIM_SetCompare1(TIM1,625); //设置占空比为1/3 } 下面是简单的发送 void IR_Send(void) { //9ms TIM_Cmd(TIM1, ENABLE); Delay_nMS(9); //4.5ms TIM_Cmd(TIM1, DISABLE); Delay_nMS(4); Delay_nUS(500); //0 TIM_Cmd(TIM1, ENABLE); Delay_nUS(565); TIM_Cmd(TIM1, DISABLE); Delay_nUS(565); //0 TIM_Cmd(TIM1, ENABLE); Delay_nUS(565); TIM_Cmd(TIM1, DISABLE); Delay_nUS(565); //0 TIM_Cmd(TIM1, ENABLE); Delay_nUS(565); TIM_Cmd(TIM1, DISABLE); Delay_nUS(565); //0 TIM_Cmd(TIM1, ENABLE); Delay_nUS(565); TIM_Cmd(TIM1, DISABLE); Delay_nUS(565); //0 TIM_Cmd(TIM1, ENABLE); Delay_nUS(565); TIM_Cmd(TIM1, DISABLE); Delay_nUS(565); //0 TIM_Cmd(TIM1, ENABLE); Delay_nUS(565); TIM_Cmd(TIM1, DISABLE); Delay_nUS(565); //0 TIM_Cmd(TIM1, ENABLE); Delay_nUS(565); TIM_Cmd(TIM1, DISABLE); Delay_nUS(565); //0 TIM_Cmd(TIM1, ENABLE); Delay_nUS(565); TIM_Cmd(TIM1, DISABLE); Delay_nUS(565); //0 TIM_Cmd(TIM1, ENABLE); Delay_nUS(565); TIM_Cmd(TIM1, DISABLE); Delay_nUS(565); //0 TIM_Cmd(TIM1, ENABLE); Delay_nUS(565); TIM_Cmd(TIM1, DISABLE); Delay_nUS(565); //0 TIM_Cmd(TIM1, ENABLE); Delay_nUS(565); TIM_Cmd(TIM1, DISABLE); Delay_nUS(565); //0 TIM_Cmd(TIM1, ENABLE); Delay_nUS(565); TIM_Cmd(TIM1, DISABLE); Delay_nUS(565); //0 TIM_Cmd(TIM1, ENABLE); Delay_nUS(565); TIM_Cmd(TIM1, DISABLE); Delay_nUS(565); //0 TIM_Cmd(TIM1, ENABLE); Delay_nUS(565); TIM_Cmd(TIM1, DISABLE); Delay_nUS(565); //0 TIM_Cmd(TIM1, ENABLE); Delay_nUS(565); TIM_Cmd(TIM1, DISABLE); Delay_nUS(565); //0 TIM_Cmd(TIM1, ENABLE); Delay_nUS(565); TIM_Cmd(TIM1, DISABLE); Delay_nUS(565); //0 TIM_Cmd(TIM1, ENABLE); Delay_nUS(565); TIM_Cmd(TIM1, DISABLE); Delay_nUS(565); //0 TIM_Cmd(TIM1, ENABLE); Delay_nUS(565); TIM_Cmd(TIM1, DISABLE); Delay_nUS(565); //0 TIM_Cmd(TIM1, ENABLE); Delay_nUS(565); TIM_Cmd(TIM1, DISABLE); Delay_nUS(565); //0 TIM_Cmd(TIM1, ENABLE); Delay_nUS(565); TIM_Cmd(TIM1, DISABLE); Delay_nUS(565); //0 TIM_Cmd(TIM1, ENABLE); Delay_nUS(565); TIM_Cmd(TIM1, DISABLE); Delay_nUS(565); //0 TIM_Cmd(TIM1, ENABLE); Delay_nUS(565); TIM_Cmd(TIM1, DISABLE); Delay_nUS(565); //0 TIM_Cmd(TIM1, ENABLE); Delay_nUS(565); TIM_Cmd(TIM1, DISABLE); Delay_nUS(565); //0 TIM_Cmd(TIM1, ENABLE); Delay_nUS(565); TIM_Cmd(TIM1, DISABLE); Delay_nUS(565); //0 TIM_Cmd(TIM1, ENABLE); Delay_nUS(565); TIM_Cmd(TIM1, DISABLE); Delay_nUS(565); //0 TIM_Cmd(TIM1, ENABLE); Delay_nUS(565); TIM_Cmd(TIM1, DISABLE); Delay_nUS(565); //0 TIM_Cmd(TIM1, ENABLE); Delay_nUS(565); TIM_Cmd(TIM1, DISABLE); Delay_nUS(565); //0 TIM_Cmd(TIM1, ENABLE); Delay_nUS(565); TIM_Cmd(TIM1, DISABLE); Delay_nUS(565); //0 TIM_Cmd(TIM1, ENABLE); Delay_nUS(565); TIM_Cmd(TIM1, DISABLE); Delay_nUS(565); //0 TIM_Cmd(TIM1, ENABLE); Delay_nUS(565); TIM_Cmd(TIM1, DISABLE); Delay_nUS(565); //0 TIM_Cmd(TIM1, ENABLE); Delay_nUS(565); TIM_Cmd(TIM1, DISABLE); Delay_nUS(565); //0 TIM_Cmd(TIM1, ENABLE); Delay_nUS(565); TIM_Cmd(TIM1, DISABLE); Delay_nUS(565); TIM_Cmd(TIM1, ENABLE); Delay_nUS(565); Delay_nUS(565); Delay_nUS(565); TIM_Cmd(TIM1, DISABLE); } 0
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