ir.c

STM32 单片机例程

#include "stm32f10x_lib.h"
#include "MyType.h"
#include "config.h"
#include "globals.h"
#include "STM32_Reg.h"

#define  NULL 0
#define  IRIN  PC12in 
#define  SERIES_TIME  20  

uint8 ConsumerCode = 0;//用户码

/*
//红外数据格式
同步头 + 8bit用户码 + 8bit用户码反码 + 8bit数据 + 8bit数据反码

//同步头： 9ms低电平，4.5ms高电平
数据：
//0.5ms低电平,0.5ms高电平   ==BIT 0
//0.5ms低电平,1ms高电平     ==BIT 1

连续码：
9ms低电平+2.2ms高电平+0.6ms低电平

上面的时间是个大概值，不一定精确
*/

/*
等待端口状态
time：等待超时时间，单位毫秒
f：等待端口状态，1=高电平，0=低电平
gTimerI：等待端口状态成功的时间，单位100us
返回：0=端口状态是等待的值，1=端口状态不是等待的值
*/
uint8 WaitBit(uint32 time, uint8 f, uint32 *gTimerI)
{//uint32 timer;
 uint8 over;
   
   gTimer_100us=0;
   //TIM1->CR1 |= TIMX_CR1_CEN;
   time*=10;
   while(1)
   {
      if(gTimer_100us>time)
      {   over=1; break;}
      //if (GPIO_ReadInputDataBit(GPIOC, GPIO_Pin_12) == f)
      if(IRIN==f)
      {   over=0; break;}
   }
   
   //TIM1->CR1 &= ~TIMX_CR1_CEN;
   
   if(gTimerI!=NULL)
      *gTimerI=gTimer_100us;
   
   return(over);
   //return(1);
}


//头9ms高，4.5ms低
char IrHeader()
{uint32 timer;
 //uint8 i=0;	
	 
	 
	 //等待出现高电平立即返回，并且得到计数值
   WaitBit(20, 1, &timer);
   if(timer<60 || timer>150)//非头脉冲
      return(0);
   
   //等待出现低电平立即返回，并且得到计数值
   WaitBit(20, 0, &timer);
   
   if(timer<35 || timer>70)//非头脉冲
      return(0);
   
   return(1);
}

//接收8位数据
//0.5ms低电平,0.5ms高电平   ==BIT 0
//0.5ms低电平,1ms高电平     ==BIT 1
int Ir8Bit()
{uint32 timer;
   char i;
   int ir_data = 0;

   for (i = 0; i < 8; i++)
   {
      if(WaitBit(1, 1, NULL))//1ms内不出现高电平就无效
         return(-1);
      
      if(WaitBit(1, 0, &timer))//1ms内不出现低电平Bit=1
      {
         ir_data <<= 1;
         ir_data |= 0x01;
         
         if(WaitBit(1, 0, &timer))//1ms内不出现低电平非法脉冲
            return(-1);
      }
      else//0.5秒就出现低电平Bit=0
      {
         ir_data <<= 1;
         ir_data &= 0xfe;
      }
   }
   return(ir_data);
}

uint32 t1,t2,t3;
int IrIn(char check, char CheckF)
{uint32 timer;
   int ir_data1, ir_data2;
   char header;
   
//   WaitBit(2, 0, &timer);
//   if(timer>150/10)
//      return(0);
//   else
//      return(-1);
   
   //if(WaitBit(1, 1, &timer))
   //   return(-1);
   
   if(WaitBit(1, 0, &timer))//2ms内不出现低电平就无效(用时1ms)
   //if(GPIO_ReadInputDataBit(GPIOC, GPIO_Pin_12) == 1)
      return(-1);


   header = IrHeader();
   if (header == 0)//(用时13ms)
      return(-1);//非法脉冲
   
   ir_data1 = Ir8Bit();
   if (CheckF == 1)
   {
      if (ir_data1 != check)
      {
         return(-1);
      }
   }
   if (ir_data1 == -1)
      return(-1);

   ir_data2 = Ir8Bit();
   
   if (ir_data2 == -1)
      return(-1);
   if ((ir_data1 + ir_data2) != 0xff )
   {
      return(-1);
   }
   else
   {
      ConsumerCode = (uint8) ir_data1; //设置用户码
   }
   
   ir_data1 = Ir8Bit();
   if (ir_data1 == -1)
      return(-1);
   
   ir_data2 = Ir8Bit();
   if (ir_data2 == -1)
      return(-1);
   
   if ((ir_data1 + ir_data2) != 0xff )
      return(-1);
   else
   {
      return(ir_data1);
   }
}


extern void delay(uint32 time);

void IR_Run(void)
{
int temp;
static uint8 flag=0;

   if(ConsumerCode==0)
      temp = IrIn(ConsumerCode, 0);
   else
      temp = IrIn(ConsumerCode, 1);
   if (temp != -1)
   {
      if(flag==0)
      {
         flag=1;
         /*PC8=0;*/ PC9=0; PC10=0; PC11=0;
      }
      else
      {
         flag=0;
         /*PC8=1;*/ PC9=1; PC10=1; PC11=1;
      }
      
      delay(500);
   }
}