int.lst

用51单片机实现IR解码

                                                      KEY_IR_,//                                                             0xF2,
                                                      KEY_IR_,//                                                             0xFF,
                                                      KEY_IR_,//                                                             0xF4,
                                                      KEY_IR_,//                                                             0xF5,
                                                      KEY_IR_,//                                                             0xF6,
                                                      KEY_IR_,//                                                             0xF7,
                                                      KEY_IR_,//                                                             0xF8,
                                                      KEY_IR_,//                                                             0xF9,
C51 COMPILER V8.02   INT                                                                   10/16/2006 17:42:27 PAGE 11  

                                                      KEY_IR_,//                                                             0xFA,
                                                      KEY_IR_,//                                                             0xFB,
                                                      KEY_IR_,//                                                             0xFC,
                                                      KEY_IR_,//                                                             0xFD,
                                                      KEY_IR_,//                                                             0xFE,
                                                      KEY_IR_//                                                              0xFF,
              
                                                       
                                          
              };
              #define  IR_KEY_REPEAT_MASK_TIMES               5
              #define IR_INPUT_BUFFER_CLEAR                   0x0000
              BOOL Get_Key_Code_Part=0;
              void T2EX_int (void)   interrupt   5  using 2 /* Negative Transition on T2EX */
              {
                     //process the interrupt  reason
              BOOL temp_bit;
                  //  EX1=0; 
                      
                      /*1. When the timer2 overflow */
                     if(TF2)
                     {        
                     
                                               
                           IR_Get_Start_Begin=0;
                                                      
                                  //clear interrupt flag
                                  TF2=0;
                                  EXF2=0;  
                                      //reaset  the Timer2
                                      TR2=0;                /*stop timer2*/
                                      TH2=0;  TL2=0;  /*reload the prescalor 19.6ms for X=40M ,  28.9mS for X=27M   37.5ms for X=22.118M*/  
                                     TR2=1;      
              
                              IR_Bit_Counter=0;
                                Get_Single_Key_Code=0;
                                IR_Input_Bits_Buffer=0x0000;
              
                                      Timer2_Overflow_Times_Counter++;
                                      
                                      if(Get_Key_Code_Part)
                                      {
                                                  Enable_Repeat_Bit=1;        
                                      }
                                      if(Timer2_Overflow_Times_Counter&0x08)    //8*28.9ms>=224ms      //&0x10    //16*9.8ms>=150ms)   
                                      {
                                      //when the time intervel is large than 108-58.5=49.5ms,disable the repeat key
                                              Enable_Repeat_Bit=0;
                                             Get_Key_Code_Part=0;
                                              Timer2_Overflow_Times_Counter=0x08;      //0x10;
                                      }
                                      
                                      return;
                                      
                                      
                                        
                     }
              
                        
                       
              
                       
C51 COMPILER V8.02   INT                                                                   10/16/2006 17:42:27 PAGE 12  

                       /* 2.the extern T2EX high-to-low  triggle the interrupt*/      
                      
                       EXF2=0;  
                       //reaset  the Timer2
                       TR2=0;                /*stop timer2*/
                      TH2=0;  TL2=0;  /*reload the prescalor 19.6ms for X=40M , 9.69ms for X=40.78X2   37.5ms for X=22.118M 25.9
             -8ms for X=24.598X*/  
                       TR2=1;               /*start timer2*/
              
                                //check the bit width
                              IR_Bit_Width=   RCAP2L+ ( (U16)(RCAP2H) <<8 );
                                
                                 
                                      
                       //when the start bit interrupt,we will kill this interrupt
                       if(IR_Get_Start_Begin==0)
                       {
                               IR_Get_Start_Begin=1;
              
                      #if(    SYSTEM_CRYSTAL  ==USE_CRYSTAL_40M039_X2)
                      //only when the X>69.36M ,theis part is needed
                               if(Timer2_Overflow_Times_Counter==1)
                                {
                                                      
                                                      if(Enable_Repeat_Bit==1)
                                                              {
                                                                       if(IR_Bit_Width>NEC_IR_REPEAT_BIT_WIDTH_MIN&&IR_Bit_Width<NEC_IR_REPEAT_BIT_WIDTH_MAX)
                                                                   {
                                                                           RCAP2H=0;
                                                                                RCAP2L=0;
                                                                              
                                                                           if(IR_Key_Repeat_Counter>=IR_KEY_REPEAT_MASK_TIMES)
                                                                              {
                                                                              //look for the repeat enable table ,if repeat enable send the key ,else do nothing
                                                                                    if(IR_Key_Repeat_Enable_Table[IR_Key_Code]==1)
                                                                                 {
                                                                                   Key_Code=IR_Key_Code;
                                                                                       IR_Key_Repeat_Counter=IR_KEY_REPEAT_MASK_TIMES;
                                                                                      }
                                                                                      else
                                                                                      IR_Key_Repeat_Counter=0;
                                                                                              
                                                                                        
                                                                              }
                                                                                   IR_Key_Repeat_Counter++;
                                                                                      
                                                                       }
                                                              }
                               }
                               
                            #endif
                              Timer2_Overflow_Times_Counter=0;
                                      
                               return;
              
                      }
              
                        
                                                      if(Enable_Repeat_Bit==1)
                                                              {
                                                                       if(IR_Bit_Width>NEC_IR_REPEAT_BIT_WIDTH_MIN&&IR_Bit_Width<NEC_IR_REPEAT_BIT_WIDTH_MAX)
                                                                   {
C51 COMPILER V8.02   INT                                                                   10/16/2006 17:42:27 PAGE 13  

                                                                           RCAP2H=0;
                                                                                RCAP2L=0;
                                                                              
                                                                           if(IR_Key_Repeat_Counter>=IR_KEY_REPEAT_MASK_TIMES)
                                                                              {
                                                                              //look for the repeat enable table ,if repeat enable send the key ,else do nothing
                                                                                    if(IR_Key_Repeat_Enable_Table[IR_Key_Code]==1)
                                                                                 {
                                                                                   Key_Code=IR_Key_Code;
                                                                                       IR_Key_Repeat_Counter=IR_KEY_REPEAT_MASK_TIMES;
                                                                                      
                                                                                      }
                                                                                      else
                                                                                      IR_Key_Repeat_Counter=0;
                                                                                              
                                                                                        
                                                                              }