## Build an intersection traffic light using the led, Electrical Engineering

Assignment Help:

Build an intersection traffic light using the LED's as in the diagram below

Day

Use the LED's on the trainer (port 11)

Main Street and Side Street alternate.

Main Street is green for 6 seconds, yellow for 2 seconds (Side Street is red while Main Street is green and yellow (8 seconds).

When Main Street is red, Side Street is green for 6 seconds, yellow for 2 seconds.

Night

Bit D0 of the dip switch controls Day and Night. (port 12)

Day is a logic 0 on Bit D0 of the dip switch

Night is a logic 1 on Bit D0 of the dip switch

Main Street is green unless a car is detected on the Side Street.

Bit D1 of the dip switch controls a car on Side Street.

When Bit D1 toggles (changes from its previous state), a car is present on Side Street.

For the 2 and 6 second delay, use a ½ second loop program as the core subroutine.

TRAFFIC LIGHT FLOW CHART

**********************************************************

************ MAIN ROUTINE (PARTIAL) *************

**********************************************************

start              LXI         SP XX,XX      ;set the stack

dmaingrn    CALL     maingrn         ;call main street green light, side red

CALL     6 sec delay

dmainyel     CALL     mainyel          ;call main street yellow light, side red

CALL     2 sec delay

dsidegrn     CALL     sidegrn           ; call side street green light, main red etc.

nite              IN           \$12                 ;check the dip switches

RAR                              ;rotate the day-nite bit in to the cy flag

JNC       maingrn         ;if 0, still day and goes to day routine,

;if 1 falls through to "Call Main Greem"

CALL     maingrn         ;returns to "Car at Side Street"

IN           12

RAR

RAR

CC         mainyel          ;make main yellow

JMP       nite

************************************************************************

********************** NIGHT SUBROUTINE ***********************

************************************************************************

CALL     maingrn         ;make the main street green

IN           12                    ;check side street

RAR                              ;is lsb still a 1 (nite)

RAR

JC          mainyel          ;make main street yellow

************************************************************************

********************* LIGHT SUBROUTINES **********************

************************************************************************

maingrn      MVI A    %11011011   ; main green, side red

OUT       \$11

CALL     6sec                ; the the 6 sec subroutine

RET

etc

********************************************************************************************

******************************** 6 SEC DELAY*******************************************

********************************************************************************************

Refer to the OPEN AND CLOSED LOOP and EXTENDING THE LOOP experiments.

********************************************************************************************

******************************** 2 SEC DELAY*******************************************

********************************************************************************************

Refer to the OPEN AND CLOSED LOOP and EXTENDING THE LOOP experiments.

Use the following memory locations for each subroutine:

MAIN ROUTINE                           \$8000

MAIN GREEN                              \$8100

MAIN YELLOW                            \$8200

SIDE GREEN                              \$8300

SIDE YELLOW                            \$8400

6 SECOND DELAY                      \$8500

2 SECOND DELAY                      \$8600

HALF SECOND DELAY                 \$8700

Put the MAIN ROUTINE on a separate listing sheet label it MAIN ROUTINE.

Put the MAIN GREEN, MAIN YELLOW on separate listing sheet label it, MAIN GREEN AND YELLOW.

Put the SIDE GREEN and SIDE YELLOW on a separate listing sheet, label it SIDE GREEN AND YELLOW.

Put the HALF SECOND DELAY on a separate listing sheet, label it HALF SECOND DALAY.

Put the 6 and 2 SECOND DELAY routines on a separate listing sheet, label it 2 AND SECOND DELAYS.

#### Different type of errors that occur during data transmission, Data Communic...

Data Communication 1. Write short notes on: a. Sky wave propagation b. Line of sight propagation 2. List and describe the different types of errors that occur during dat

#### Electrical drives, induction motor drives

induction motor drives

#### What is an interrupt, What is an interrupt? An interrupt is either a s...

What is an interrupt? An interrupt is either a software-generated CALL or hardware-generated CALL.

#### Explain acceptance cone, Explain Acceptance cone? The fibre air - core ...

Explain Acceptance cone? The fibre air - core interface is display below: In this figure Omax is the maximum angle, inside that the rays undergo total internal reflecti

#### Show the boundary of a word, Q. Show the boundary of a Word? The bounda...

Q. Show the boundary of a Word? The boundary of a Word is defined as either 16-bits or the size of the data bus for the processor, and a Double Word is Two Words. so, a Word an

#### Find the decibels of improvement in signal-to-noise ratio, If a compressor ...

If a compressor in a system can change a message crest factor from 3.2 to 2, while maintaining its peak amplitude constant, find the decibels of improvement in signal-to-noise rati

#### Digital electronic, What are the advantages of wired-AND connection of digi...

What are the advantages of wired-AND connection of digital IC

#### Convert decimal numbers into binary, Q. Convert the following DECIMAL numbe...

Q. Convert the following DECIMAL numbers into BINARY, double check by converting the result BINARY to DECIMAL. Assume all binary numbers are represented by 12 bits on LHS of binary

#### Find the equation of the circle concentric, 1. Find the slope and the y-int...

1. Find the slope and the y-intercept of the line whose equation is 5x + 6y = 7. 2. Find the equation of the line that is parallel to 2x + 5y = 7 and passes through the midpoint

#### Insulators, various types of electrical insulators used in electrical engin...

various types of electrical insulators used in electrical engineering