cdle-a410_main.c

红外遥控编解码相关资料-9.8M.zip

/*----------------------------------------
CDLE-A410_Main.c

电脑音源切换控制器
	用AT89C251+CD4016切换控制，可控制四路以上
的立体音源输入切换，一路立体声输出,有红外遥
控(SAA3010T电视遥控器，只处理四个音源)

Copyright 2003 http://cdle.yeha.net 
               http://cdle.126.com
All rights reserved.		
		明浩 E-mail: [e-mail]
----------------------------------------*/

#include <AT892051.h>

static unsigned char data CS;
static unsigned char data IRCode[4],IRCON,IRCON2;

void main(void)
{
	unsigned int de;
	void InitCom(unsigned char BaudRate);
	void ComOutChar(unsigned char OutData);
	void CSToOut(void);

	InitCom(6); //设置波特率为9600 1-7波特率300－19200
	EA = 1;	//允许CPU中断
	ES = 1;	//开串口中断
	IT0 = 1; //INT0下降沿有效
	EX0 = 1; //开INT0中断
	CS = 0; //设置CS为0不选任何的音源，如为1则选第1路
	CSToOut();
	do
		{	
			if (P1_0 == 0)  //取按键值
				{
					CS = 1;
					P1 = 255; //P1口全为高电平，4-7通过反相为低不选任何音源，0-3为高用于
					CSToOut();
				}
			if (P1_1 == 0)
				{
					CS = 2;
					P1 = 255;
					CSToOut();
				}
			if (P1_2 == 0)
				{
					CS = 3;
					P1 = 255;
					CSToOut();
				}
			if (P1_3 == 0)
				{
					CS = 4;
					P1 = 255;
					CSToOut();
				}
			for (de=0; de<4000; de++);
		}
	while(1);
}


//串口初始化 晶振为11.0592M　方式1 波特率300-57600
void InitCom(unsigned char BaudRate)
{
	unsigned char THTL;
	switch (BaudRate)
		{
			case 1: THTL = 64; break; //波特率300
			case 2: THTL = 160; break; //600
			case 3: THTL = 208; break; //1200
			case 4: THTL = 232; break; //2400
			case 5: THTL = 244; break; //4800
			case 6: THTL = 250; break; //9600
			case 7: THTL = 253; break; //19200
			case 8: THTL = 255; break; //57600
			default: THTL = 208;
		}
	SCON = 0x50; //串口方式1,允许接收
	TMOD = 0x21; //定时器1定时方式2定时器0方式1　用在别处可以不用定时器0,TMOD=0x20
	TCON = 0x40; //设定时器1开始计数
	TH1 = THTL;
	TL1 = THTL;
	PCON = 0x80; //波特率加倍控制,SMOD位
	RI = 0;	//清收发标志
	TI = 0;
	TR1 = 1; //启动定时器
}

//向串口输出一个字符（非中断方式）
void ComOutChar(unsigned char OutData)
{
	SBUF = OutData; //输出字符
	while(!TI); //空语句判断字符是否发完
	TI = 0; //清TI
}

//串口接收中断
void ComInINT(void) interrupt 4 using 1
{
	if (RI) //判断是不收完字符
		{
			switch(SBUF)
				{
				  case 0x61: CS = 1; break; //根据SBUF设置CS　接收'abcde'调试方便
					case 0x62: CS = 2; break;
					case 0x63: CS = 3; break;
					case 0x64: CS = 4; break;
					case 0x65: CS = 0; break;
				}
			P1 = 255; //P1口全为高电平，4-7通过反相为低不选任何音源，0-3为高用于读取按键
			RI = 0; //RI清零
			CSToOut();
		}
}

//定时器0中断处理
void timeint(void) interrupt 1 using 2
{
  //unsigned char a;
  TH0=0xFD;
  TL0=0x1E; //设定时值为800us

	if (IRCON<3)
    {
      if (IRCON2<8) //每中断一次读一次遥控接收头的状态,每二次为遥控编码中的一个位
        {
          IRCON2++;
		      IRCode[IRCON]=IRCode[IRCON]<<1; //每读一次放入变量中的二进制的一个位，每次左移一位
		      IRCode[IRCON]=IRCode[IRCON] | P3_2; //每八次填满一个字节，一个字节存放遥控编码4个位
        }
      else
        {
          IRCON++; //第填满一个字节，指向下一个变量
          IRCON2=0; //计数清零
        }
    }
 else
  {
		TR0 = 0; //关闭定时器
		ET0 = 0; //定时器0中断关闭
		//for (a=0;a<3;a++)
			//ComOutChar(IRCode[a]); //这两句可通过PC串口调试软件看接收到的数据，测试用
    if ((IRCode[1] == 0x55) && (IRCode[2] == 0xAB)) //取遥控值,取变量中的2,3字节
			{                        //第一字节是引导码，第二、三字节是起始位、控制位和系统码
				CS = 1;               
				P1 = 255;
				CSToOut();
				}
		if ((IRCode[1] == 0x55) && (IRCode[2] == 0xAC))
			{
				CS = 2;
				P1 = 255;
				CSToOut();
			}
		if ((IRCode[1] == 0x55) && (IRCode[2] == 0xAD))
			{
				CS = 3;
				P1 = 255;
				CSToOut();
			}
		if ((IRCode[1] == 0x55) && (IRCode[2] == 0xB2))
			{
				CS = 4;
				P1 = 255;
				CSToOut();
			}
		if ((IRCode[1] == 0x55) && (IRCode[2] == 0xD2)) //关闭
			{
				CS = 0;
				P1 = 255;
				CSToOut(); 
			}
		if ((IRCode[1] == 0x55) && (IRCode[2] == 0xD3)) //静音
			{
				ComOutChar(8);
			}
		if ((IRCode[1] == 0x55) && (IRCode[2] == 0x2A)) //音量控制+
			{
				ComOutChar(6);
			}
		if ((IRCode[1] == 0x55) && (IRCode[2] == 0x2B)) //音量控制-
			{
				ComOutChar(7);
			}
		ES = 1; //打开串口中断
		EX0 = 1; //打开
	} 
}

//INT0中断
void INT0Fun(void) interrupt 0 using 2
{
	ES = 0; //串口中断关闭
  EX0 = 0; //外部中断0关闭
  ET0 = 1; //定时器0中断打开
  TH0=0xFD;
  TL0=0x1E; //设定时值为800us
  
	for (IRCON=0; IRCON<3; IRCON++)
		IRCode[IRCON] = 0;
	IRCON = 0;
	IRCON2 = 0; //计数清零

	TR0 = 1;//开始计数
}

//根据全局变量输出相应的控制信号
void CSToOut(void)
{
	P3_3 = 0;
	P3_4 = 0;
	P3_5 = 0;
	P3_7 = 0; //用P3=0则烧到片上无法运行，原因不明，可能串口P3_0,P3_1有关
	switch(CS)
		{
			case 0:
				P1 = 255; //P1口全为高电平，0-3通过反相为低不选任何音源，4-7为高用于读取按键
				ComOutChar(5); //发0x05到PC
				break;
			case 1:
				P1_4 = 0; //为0反相后高电平选指定的音源
				P3_3 = 1;
				ComOutChar(1);
				break;
			case 2:
				P1_5 = 0;
				P3_4 = 1;
				ComOutChar(2);
				break;
			case 3:
				P1_6 = 0;
				P3_5 = 1;
				ComOutChar(3);
				break;
			case 4:
				P1_7 = 0;
				P3_7 = 1;
				ComOutChar(4);
				break;
		}
}