Experiment 8 Traffic Light Control (80C51 MCU Assembly Language Programming)

Design a traffic light control system to control the red, yellow and green lights in the east-west direction and the red, yellow and green lights in the north-south direction. It can be controlled manually or automatically. Set two input control switches (P1.0 and P1.1 can be used as input control). The control process is as follows: East 
                -West Direction                  North-South Direction
P1.0  P1.1     Red  Yellow Green     Red  Yellow Green 1  0  On  for 3S then on 0  1  On for 3S then on 0  0  On  1  1  Flash (On for 1S and Off for 1S)  Flash (On for 1S and Off for 1S) ORG 0000H AJMP MAIN ORG 000BH AJMP T0 ORG 0030H MAIN:MOV P1,#03H MOV TMOD,#01H MOV TH0,#3CH MOV TL0,#0B0H SETB EA SETB ET0 MOV R2,#30 MOV R3,#30 MOV R4,#50 MOV R5,#50 MOV R6,#10 MOV R7,#10 SETB TR0 SJMP $ ORG 0200H;Enter the timer, first judge the situation T0:SETB P1.0 SETB P1.1 JB P1.0,AA;Judge the situation every 100ms JNB P1.0,BB AA:JB P1.1,SHAN;11 JNB P1.1,ZD2;01 BB:JB P1.1,ZD1  ;10 JNB P1.1,HONG;00 SHAN:MOV TH0,#3CH;Yellow light flashing situation MOV TL0,#0B0H CJNE R6,#00H,LOOP1 MOV P1,#01001011B;Light up for one second DJNZ R7,GORET1 MOV R6,#0AH GORETI:RETI LOOP1:MOV P1,#00000011B;Off for one second DJNZ R6,GORET1 MOV R7,#0AH GORET1:RETI HONG:MOV TH0,#3CH ;Red light is always on MOV TL0,#0B0H MOV P1,#10010000B RETI ZD1:JB P1.4,ZD11 MOV TH0,#3CH;Automatic situation MOV TL0,#0B0H CJNE R4,#00H,LOOP2 MOV P1,#10001001B;Yellow light is on for 3 seconds DJNZ R2,GORET2 MOV R4,#50 LJMP ZD11 LOOP2:MOV P1,#10000101B;Red light is on for 5 seconds DJNZ R4,GORET2 MOV R2,#1EH GORET2:RETI ZD11:MOV TH0,#3CH ;Automatic situation 11 MOV TL0,#0B0H CJNE R4,#00H,LOOP5 MOV P1,#01010001B; Yellow light on for 3 seconds DJNZ R2,GORET3 MOV R4,#32H MOV P1,#10000110B AJMP ZD1 LOOP5:MOV P1,#00110001B; Green light on for 5 seconds DJNZ R4,GORET3 MOV R2,#1EH GORET3:RETI ZD2:JB P1.7,ZD21 MOV TH0,#3CH ; Automatic situation 2 MOV TL0,#0B0H CJNE R5,#00H,LOOP3 MOV P1,#01010010B; Yellow light on for 3 seconds DJNZ R3,GORET4 MOV R5,#32H AJMP ZD21 LOOP3:MOV P1,#00110010B;Green light on for 5 seconds DJNZ R5,GORET4 MOV R3,#1EH GORET4:RETI ZD21:MOV TH0,#3CH;Automatic situation MOV TL0,#0B0H CJNE R5,#00H,LOOP6 MOV P1,#10001010B;Yellow light on for 3 seconds DJNZ R3,GORET5 MOV R5,#32H                  
                                            
                       
                            
                          
 




 


    
    
    
    
    
    
    
    
    
    
    
    
    
 


  
  
  

  

  
 

    
    
    
    
    
    
 
       
       
  
 

    
    
    
 

   
   
   
   
   
   
   
 
       
       
    
 
 
   
   
   
   
   
   
   
 
       
       
     
 

   
   
   
   
   
   
   
 
       
       
       
 
 
   
   
   
   
   
   MOV P1,#00110010B
   AJMP ZD2
 LOOP6:MOV P1,#10000110B; Red light on for 5 seconds
       DJNZ R5,GORET5
       MOV R3,#1EH
    GORET5:RETI