【stm32f0实验】红外接收+串口中断收发

只看该作者 · 2012-8-24 13:54

首先谢谢ST送的板子。最近抽空写了一个stm32f0的程序，IAR的。主要的功能是利用定时器2的输入捕获功能，接收普通红外按键发出的数据，然后实验了一下F0的两个串口，中断方式下的接收和发送。
捕获用的管管脚是PA1，定时器2的2通道。
希望有的坛友能用的到。

stm32f0红外接收.rar (5.53 MB)

只看该作者 · 2012-8-24 13:56

定时器2的2通道配置
void REMOTE_config(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
  TIM_ICInitTypeDef  TIM_ICInitStructure;
  TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);//PA1
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1 ;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
  GPIO_PinAFConfig(GPIOA, GPIO_PinSource1, GPIO_AF_2);

  TIM_TimeBaseStructure.TIM_Period = 65535;
  TIM_TimeBaseStructure.TIM_Prescaler = 19;//24ms
  TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
  TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);

  TIM_ICInitStructure.TIM_Channel = TIM_Channel_2;
  TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Falling;
  TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;
  TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;
  TIM_ICInitStructure.TIM_ICFilter = 0x00;
  TIM_PWMIConfig(TIM2, &TIM_ICInitStructure);

  TIM_ClearITPendingBit(TIM2,  TIM_IT_CC2);
  TIM_ITConfig(TIM2, TIM_IT_CC2, ENABLE);
  TIM_Cmd(TIM2, ENABLE);
}

只看该作者 · 2012-8-24 13:58

这是定时器2的中断处理
extern u8 remotekey;
u16 ccd [80] ;
volatile u16 data0;          //前16个脉冲存放地址
volatile u16 data1;          //后16个脉冲存放地址
void TIM2_IRQHandler(void)
{
  static int  id  = 0 ;
  static u16  cur = 0 ;
  static u16  last= 0 ;
  u8 remotekey_1;
  u16 step ;
  int fh;
  u8 i;
  if(TIM_GetITStatus( TIM2,  TIM_IT_CC2 ))
{
   TIM_ClearITPendingBit(TIM2,TIM_IT_CC2);
   cur = TIM_GetCapture2(TIM2);
      if(cur > last )
      {step = cur - last ;}
      else
         {step = 65535 - last + cur ;}
         fh = step *10 / (2400) ;
      if((fh>130)&&(fh<140))
      {id =0;}
      else if((fh>9)&&(fh<13))
            {ccd[id++]=0;}
            else if( (fh > 20 ) && (fh <24 ))
                     {ccd[id++]=1;}
      if(id==32)
         {
         id=0;
         remotekey=0;
         for(i= 0 ;i< 8 ; i++ )
            {remotekey |= ccd[16+i]<<i ; }
         remotekey_1 = 0 ;
         for(i= 0 ;i< 8 ; i++ )
            {remotekey_1 |= ccd[24+i]<<i ;}
         if((remotekey+remotekey_1)!=255)
         {remotekey=0;remotekey_1=0;}
         }
   }
  last = cur ;
}