📄 necdecode.c
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//ICC-AVR application builder : 2006-9-20 14:49:40
// Target : M16
// Crystal: 7.3728Mhz
#include <iom16v.h>
#include <macros.h>
#include <eeprom.h>
#include "hptvstruct.h"
//#include "necdecode.h"
// time2的中断周期为102us
//接收NEC码起始位最小时间 118*102us=12.036ms
//接收NEC码起始位最大时间 147*102us=14.994ms
//接收逻辑0最小时长 10*102us=1.02ms
//接收逻辑0最大时长 13*102us=1.326ms
//接收逻辑1最小时长 20*102us=2.04ms
//接收逻辑1最大时长 25*102us=2.55ms
//重复码与上位的最小时长 980*102us=99.96ms
//重复码的最大时长 1176*102us=120.36ms
//当NEC开始接收还未接收完成同时又不是重复码时超过TimeNecOutoftime的时间将视为不是NEC码
#define NecStartBitMin 118
#define NecStartBitMax 147
#define NecBit0Min 10
#define NecBit0Max 13
#define NecBit1Min 20
#define NecBit1Max 25
#define BTvState 1
#define NecRepeatBitMin 103
#define NecRepeatBitMax 115
#define TimeNecRepeatMin 880
#define TimeNecRepeatMax 1180
#define TimeNecRepeatMins 372
#define TimeNecRepeatMaxs 450
#define TimeNecOutoftime 40
unsigned char BTheFirstFallEdge; //为0时说明为接收到第一个下降沿或接受到第一个；为1时认为已接收到了第一个或大于1个下降沿；做为起始时间基准
unsigned char BReceiveStart; //开始接收数据标志
unsigned char BNecFallEdge; //是否有下降边沿
unsigned char TimeNecFallEdge; //下降边沿时间长度
unsigned char RTimeNecFallEdge; //下降边沿时间长度结果保存
unsigned char BNecStartBit; //是否有起始位
unsigned char NecData[4]; //红外数据
unsigned int NecDecodeNum; //红外数据位个数指针
unsigned int i;
unsigned char BHasReceiveNec; //已收到一个NEC码 为进行接收重复码做准备
unsigned char BPowerButton; //有开机按键
unsigned int NecRepeatCodeNum; //重复码与上一个NEC码时间间隔计数变量和重复码本身长度计数变量
unsigned int RNecRepeatCodeNum;//重复码计数结果保存
unsigned char BNecRepeat; //重复码标志，置1为收到重复码
unsigned char ResultNec;
unsigned char RepeatCountFlag; //为0时为还已收到了一个NEC码还未收到一次重复码，为1时为收到至少一个重复码
unsigned char BRepeatStar; //Repeat开始标志
unsigned char NecData_Map;
//加入的开关机控制变量和I2C变量
unsigned char power_key_open_enable;//
unsigned char power_on_close_enable;//
unsigned char tv_state; //机器状态位
unsigned char irda_num,irda_b;
unsigned char i2c_public; //i2c使用权检测
unsigned char irda_data; //预发送数据
//Add end
extern unsigned char close_machine_enable,open_machine_enable;
unsigned char RepeatControl;
volatile unsigned char Powerdown_signal;
unsigned char Fac_mode;
unsigned char Fac_aging;
extern unsigned char Open_Panel_flag;
/*
typedef enum _TVstate
{
standby,
booting,
delaying,
working,
halting
}TVstate_t;
*/
extern volatile TVstate_t System_State;
//test
union NecTime
{
unsigned int NecRepeatNum;
unsigned char a[2];
}NecTimeTest;
void Head_Reset_Nec_receive()
{
BReceiveStart=0;
TimeNecFallEdge=0;
RTimeNecFallEdge=0;
BNecStartBit=0;
NecData[0]=0;
NecData[1]=0;
NecData[2]=0;
NecData[3]=0;
NecDecodeNum=0;
BPowerButton=0;
i=0;
RepeatControl=0;
}
void HasR_Head_Reset_Nec_receive()
{
BReceiveStart=0;
TimeNecFallEdge=0;
RTimeNecFallEdge=0;
BNecStartBit=0;
NecDecodeNum=0;
BPowerButton=0;
i=0;
}
void Nec_data_deal_fun(void)
{
//UDR=ResultNec;
switch(ResultNec)
{
case 15:
//
if(System_State==working)
{
// UDR=0x90;
if(close_machine_enable==1) //加入System_State后这个条件其实无用处了
{
// UDR=0x91;
Powerdown_signal=1;
i2c_public|=1<<7;
irda_data=ResultNec|(1<<7); //发送键码最高位置1
}
}
else
{
// infrared_open_enable=1;////开机
if(open_machine_enable==1)
{
power_key_open_enable=1;
Open_Panel_flag=1;
}
}
break;
case 50: //工厂遥控器开关机
//
if(System_State==working)
{
// UDR=0x90;
if(close_machine_enable==1)
{
// UDR=0x91;
Powerdown_signal=1;
i2c_public|=1<<7;
irda_data=ResultNec|(1<<7); //发送键码最高位置1
}
}
else
{
// infrared_open_enable=1;////开机
if(open_machine_enable==1)
{
power_key_open_enable=1;
}
}
break;
case 51:
if(System_State==working)
{
if(Fac_aging==0xff)
{
if(Fac_mode==0xff)
{
Fac_mode=0;
EEPROMwrite(0x90,0x00);
}
else
{
Fac_mode=0xff;
EEPROMwrite(0x90,0xff);
}
}
i2c_public|=1<<7;
irda_data=ResultNec|(1<<7);
}
break;
case 52:
if(System_State==working)
{
if(Fac_mode==0)
{
Fac_aging=EEPROMread(0x80);
if(Fac_aging==0)
{
EEPROMwrite(0x80,0xff);
}
else
{
EEPROMwrite(0x80,0x00);
}
}
i2c_public|=1<<7;
irda_data=ResultNec|(1<<7);
}
break;
default: //开关机键不申请i2c通讯
if(System_State==working)
{
i2c_public|=1<<7; //红外键码i2c发送申请
//UDR=rc5_data_cmd;
irda_data=ResultNec|(1<<7); //发送键码最高位置1
// UDR=irda_data;
}
break;
}
}
void Nec_consumer_map()
{
NecData_Map=NecData[2];
switch(NecData_Map)
{
case 0:
case 1:
case 2:
case 3:
case 4:
case 5:
case 6:
case 7:
case 8:
case 9:
case 10:
case 11:
case 12:
case 13:
case 14:
case 15:
case 16:
case 17:
case 18:
case 19:
case 20:
case 21:
case 22:
case 23:
case 24:
case 25:
case 26:
case 27:
case 28:
case 29:
ResultNec=NecData_Map;
break;
case 64:
ResultNec=30;
break;
case 66:
ResultNec=31;
break;
case 67:
ResultNec=32;
break;
case 68:
ResultNec=33;
break;
case 72:
ResultNec=34;
break;
case 73:
ResultNec=35;
break;
case 65: //dot button
ResultNec=36;
break;
default:
ResultNec=49;
break;
}
}
void Nec_fac_map()
{
NecData_Map=NecData[2];
switch(NecData_Map)
{
case 16:
ResultNec=50;
break;
case 0:
ResultNec=51;
break;
case 21:
ResultNec=52;
break;
case 23:
ResultNec=53;
break;
case 94:
ResultNec=54;
break;
case 71:
ResultNec=55;
break;
case 25:
ResultNec=56;
break;
case 67:
ResultNec=57;
break;
case 13:
ResultNec=58;
break;
case 5:
ResultNec=59;
break;
case 1:
ResultNec=60;
break;
case 10:
ResultNec=61;
break;
case 27:
ResultNec=62;
break;
case 93:
ResultNec=63;
break;
case 4:
ResultNec=64;
break;
case 17:
ResultNec=65;
break;
case 6:
ResultNec=66;
break;
case 80:
ResultNec=67;
break;
case 70:
ResultNec=68;
break;
case 76:
ResultNec=69;
break;
case 90:
ResultNec=70;
break;
case 73:
ResultNec=71;
break;
case 74:
ResultNec=72;
break;
case 68:
ResultNec=73;
break;
case 65:
ResultNec=74;
break;
case 75:
ResultNec=75;
break;
case 81:
ResultNec=76;
break;
case 8:
ResultNec=77;
break;
case 69:
ResultNec=78;
break;
case 78:
ResultNec=79;
break;
case 66:
ResultNec=80;
break;
case 84:
ResultNec=81;
break;
case 9:
ResultNec=82;
break;
case 29:
ResultNec=83;
break;
case 31:
ResultNec=84;
break;
case 20:
ResultNec=85;
break;
case 15:
ResultNec=86;
break;
case 91:
ResultNec=87;
break;
case 30:
ResultNec=88;
break;
case 24:
ResultNec=89;
break;
case 89:
ResultNec=90;
break;
case 88:
ResultNec=91;
break;
case 86:
ResultNec=92;
break;
case 72:
ResultNec=93;
break;
case 83:
ResultNec=94;
break;
case 28:
ResultNec=95;
break;
case 79:
ResultNec=96;
break;
default:
ResultNec=126;
break;
}
}
void Deal_Repeat()
{
if((NecData[1]==0x05)&&(NecData[0]==0x86)) //用户码正确 for bestbuy
{
Nec_consumer_map();
// ResultNec=NecData[2];
// UDR=0x20;
irda_num++;
irda_b=1;
if(RepeatControl==3)
{
if(System_State==standby||System_State==working)
{
Nec_data_deal_fun();
}
}
else
{
RepeatControl++;
}
}
else
{
/* UDR=0x20;
while(!(UCSRA&(1<<UDRE)));
UDR=NecData[0];
while(!(UCSRA&(1<<UDRE)));
UDR=NecData[1];
while(!(UCSRA&(1<<UDRE)));
UDR=NecData[2];
while(!(UCSRA&(1<<UDRE)));
UDR=NecData[3];
*/
if((NecData[1]==0xfc)&&(NecData[0]==0x00)) //用户码正确 for fac
{
Nec_fac_map();
// ResultNec=NecData[2];
// UDR=0x20;
irda_num++;
irda_b=1;
if(RepeatControl==3)
{
if(System_State==standby||System_State==working)
{
Nec_data_deal_fun();
}
}
else
{
RepeatControl++;
}
}
}
HasR_Head_Reset_Nec_receive();
}
void Nec_Decode()
{
// if(((NecData[1]==0xbf)||(NecData[1]==0xfc))&&(NecData[0]==0x00)) //用户码正确 for hisense
if((NecData[1]==0x05)&&(NecData[0]==0x86)) //用户码正确 for bestbuy
{
// UDR=0x66;
// while(!(UCSRA&(1<<UDRE)));
// UDR=NecData[2];
Nec_consumer_map();
// ResultNec=NecData[2];
// UDR=0x10;
irda_num++;
irda_b=1;
if(System_State==standby||System_State==working)
{
Nec_data_deal_fun();
}
}
else
{
if((NecData[1]==0xfc)&&(NecData[0]==0x00)) //用户码正确 for bestbuy
{
// UDR=0x10;
Nec_fac_map();
// ResultNec=NecData[2];
// UDR=0x10;
irda_num++;
irda_b=1;
if(System_State==standby||System_State==working)
{
Nec_data_deal_fun();
}
}
}
HasR_Head_Reset_Nec_receive();
}
void RepeatReceive()
{
if(RepeatCountFlag==0)
{
if(BRepeatStar==0)
{
if((RNecRepeatCodeNum>=TimeNecRepeatMins)&&(RNecRepeatCodeNum<=TimeNecRepeatMaxs)) //识别是否在重复码的最大发送时间之内
{
// UDR=0x65;
BRepeatStar=1;
return;
}
else
{
BHasReceiveNec=0;
RNecRepeatCodeNum=0;
Head_Reset_Nec_receive();
return;
}
}
else
{
if((RNecRepeatCodeNum>=NecRepeatBitMin)&&(RNecRepeatCodeNum<=NecRepeatBitMax))
{
// UDR=0x66;
RepeatCountFlag=1;
BRepeatStar=0;
Deal_Repeat();
// Head_Reset_Nec_receive();
return;
}
else
{
BHasReceiveNec=0;
BRepeatStar=0;
Head_Reset_Nec_receive();
return;
}
}
}
if(RepeatCountFlag==1)
{
if(BRepeatStar==0)
{
if((RNecRepeatCodeNum>=TimeNecRepeatMin)&&(RNecRepeatCodeNum<=TimeNecRepeatMax))
{
// UDR=0x67;
BRepeatStar=1;
return;
}
else
{
// UDR=0x91;
BHasReceiveNec=0;
NecRepeatCodeNum=0;
RNecRepeatCodeNum=0;
RepeatCountFlag=0;
Head_Reset_Nec_receive();
return;
}
}
else
{
if((RNecRepeatCodeNum>=NecRepeatBitMin)&&(RNecRepeatCodeNum<=NecRepeatBitMax))
{
// UDR=0x68;
BRepeatStar=0;
Deal_Repeat();
// Head_Reset_Nec_receive();
return;
}
else
{
RepeatCountFlag=0;
BHasReceiveNec=0;
NecRepeatCodeNum=0;
RNecRepeatCodeNum=0;
RepeatCountFlag=0;
BRepeatStar=0;
Head_Reset_Nec_receive();
return;
}
}
}
}
void Nec_Receive()
{
i=NecDecodeNum/8;
if(BNecStartBit==0)
{
if((RTimeNecFallEdge>=NecStartBitMin)&&(RTimeNecFallEdge<=NecStartBitMax)) //识别起始位
{
BNecStartBit=1;
return;
}
else
{
Head_Reset_Nec_receive();
return;
}
}
else
{
if((RTimeNecFallEdge>=NecBit0Min)&&(RTimeNecFallEdge<=NecBit0Max))
{
NecData[i]>>=1;
NecDecodeNum++;
}
else
{
if((RTimeNecFallEdge>=NecBit1Min)&&(RTimeNecFallEdge<=NecBit1Max))
{
NecData[i]>>=1;
NecData[i]+=0x80;
NecDecodeNum++;
}
else //如果不是0或1,重新开始
{
Head_Reset_Nec_receive();
return;
}
}
}
if(NecDecodeNum==32) //一个NEC码接收完成
{
BHasReceiveNec=1;
RepeatControl=0;
BNecStartBit=0;
Nec_Decode();
return;
}
}
//call this routine to initialize all peripherals
void IR_var_init()
{
BTheFirstFallEdge=0;
BReceiveStart=0;
BNecFallEdge=0;
TimeNecFallEdge=0;
RTimeNecFallEdge=0;
BNecStartBit=0;
NecData[0]=0;
NecData[1]=0;
NecData[2]=0;
NecData[3]=0;
NecDecodeNum=0;
BHasReceiveNec=0;
BPowerButton=0;
NecRepeatCodeNum=0;
BNecRepeat=0;
RepeatCountFlag=0;
i=0;
RepeatControl=0;
Powerdown_signal=0;
Fac_mode=EEPROMread(0x90);
Fac_aging=0;
}
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