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c51红外通讯程序
void int1Remote() interrupt 2
{
uCHAR tempTH1;
bit ir_0_1,ir_flag;
tempTH1=TH1;
EX1=0;
ir_flag=0;
ir_enable=0;
if(TF1)
{
IRTimer1Start();
goto ir_return1;
}
IRTimer1Start();
switch(tempTH1)
{
case IR_13_5MS://ir start
ir_word=0;
ir_bit=0;
ir_start=1;
PRE_REMOTE_KEY=0;
ir_key_continue_pressed=0;
goto ir_return1;
case IR_1_125MS://bit '0'
if(ir_start)
{
ir_0_1=0;
ir_flag=1;
}
break;
case IR_2_25MS://bit '1'
if(ir_start)
{
ir_0_1=1;
ir_flag=1;
}
break;
case IR_11_25MS1://ir key continue pressed
ir_bit=0;
ir_word=4;
ir_key_continue_pressed=1;
break;
default:
ir_bit=0;
ir_word=0;
goto ir_return1;
}
if(ir_flag)
{
ir_data[ir_word]>>=1;
if(ir_0_1){
ir_data[ir_word]|=0x80;
}
else{
ir_data[ir_word]&=0x7f;
}
ir_bit++;
ir_flag=0;
}
if(ir_bit==8)
{
ir_word++;
ir_bit=0;
}
if(ir_word==4)
{
ir_word=0;
Using_Timer1=0;
#ifdef RC42
if(ir_key_continue_pressed){
ir_enable=1;
Using_Timer1=0;
PUSH_Message_Buf(IR_Key, ir_data[2]);
}
else if((ir_data[0]==IR_CUSTOM_CODE1)&&(ir_data[1]
==IR_CUSTOM_CODE2)){
ir_enable=1;
Using_Timer1=0;
PUSH_Message_Buf(IR_Key, ir_data[2]);
}
#else
if(ir_key_continue_pressed){
ir_enable=1;
}
else if((ir_data[2]==IR_CUSTOM_CODE1)&&(ir_data[3]==IR_CUSTOM_CODE2))
{
ir_enable=1;
PUSH_Message_Buf(IR_Key, ir_data[0]);
}
#endif
else{
ir_start=0;
}
}
ir_return1:
INT1=1;
EX1=1;
return;
}
void Timer1Clock(uCHAR T1_TH,uCHAR T1_TL)
{
TMOD=TMOD|0X10;
TH1=T1_TH;
TL1=T1_TL;
TR1=1;
}
void Timer1_IRQ () interrupt 3
{
if(IR_560US_Re){ //重发码结束
goto IR_END;
}
else if(IR_2MS_Re){ //重发码的低电平0.5ms
IR_OUT=0;
IR_560US_Re=1;
Timer1Clock(IR_560us_TH1,IR_560us_TL1);
}
else if(LeaderCode_9MS){ //前导码和重发码的9ms
IR_OUT=1;
LeaderCode_9MS=0;
if(IR_Keep_Press){
IR_2MS_Re=1;
Timer1Clock(IR_2MS_TH1,IR_2MS_TL1);//重发码的高
电平2mS
}
else{
LeaderCode_4_5MS=1;
IR_Out_Times=0;
Timer1Clock(IR_4_5MS_TH1,IR_4_5MS_TL1);//前导码
的4.5ms
}
}
else if(LeaderCode_4_5MS){
IR_OUT=0;
LeaderCode_4_5MS=0;
IR_Sending=1;
Timer1Clock(IR_560us_TH1,IR_560us_TL1);
}
else if(IR_Sending){
IR_OUT=1;
if(IR_Tran_data[0]&0x01){//为什么一直用IR_Tran_data[0]，参
考RRC_IR_OUT()函数。
Timer1Clock(IR_1960us_TH1,IR_1960us_TL1);// 1
}
else{
Timer1Clock(IR_560us_TH1,IR_560us_TL1);// 0
}
IR_Out_Times++;
if(IR_Out_Times!=33){
LeaderCode_4_5MS=1;
RRC_IR_OUT();
}
else{ //发
送完毕
IR_END:
RESET_IROUT();
EX1=1;
}
}
}
void IR_Start_Tran(uchar Send_Data)
{
IR_Tran_data[0]=Send_Data;
IR_Tran_data[1]=(~IR_Tran_data[0]);
IR_Tran_data[2]=IR_CUSTOM_CODE1;
IR_Tran_data[3]=IR_CUSTOM_CODE2;
LeaderCode_9MS=1;
IR_OUT=0;
EX1=0;
Timer1Clock(IR_9MS_TH1,IR_9MS_TL1);
}
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