PROGRAM FOR TRAFFIC LIGHT CONTROLLER

 TRAFFIC LIGHT CONTROLLER Basics  :

Port A – E800 / E804

EAST RED

EAST AMBER

EAST RIGHT

EAST LEFT

SOUTH RED

SOUTH AMBER

SOUTH RIGHT

SOUTH LEFT

Port B – E801/ E805

WEST RED

WEST AMBER

WEST RIGHT

WEST LEFT

NORTH RED

NORTH AMBER

NORTH RIGHT

NORTH LEFT

Port C – E802 / E806

EAST PEDESTRIAN

SOUTH PEDESTRIAN

WEST PEDESTRIAN

NORTH PEDESTRIAN

SOUTH STRAIGHT

EAST STRAIGHT

NORTH STRAIGHT

WEST STRAIGHT

Pedestrian LED – 1 –RED                                                       Other LEDs      1 – GLOW

                              0 – GREEN                                                                        2 - OFF

MOV DPTR,#E803

MOV A,#80

MOVX @DPTR,A

RPT:    MOV DPTR,#0000

NXT:   MOVX A,@DPTR

PUSH 83

PUSH 82

MOV DPTR,#E800

MOVX @DPTR,A

POP 82

POP 83

INC DPTR

MOVX A,@DPTR

PUSH 83

PUSH 82

MOV DPTR,#E801

MOVX @DPTR,A

POP 82

POP 83

INC DPTR

MOVX A,@DPTR

PUSH 83

PUSH 82

MOV DPTR,#E802

MOVX @DPTR,A

POP 82

POP 83

LCALL DELAY

INC DPTR

MOV A,82

CJNE #06,NXT (06 – if number of data byte is six)

SJMP RPT

DELAY:    MOV R0,#06

MOV R1,#FF

MOV R2,#FF

DJNZ R2,L1

DJNZ R1,L2

DJNZ R0,L3

RET

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