Help with assembly coding

[Greg]

Write a program that continuously flashes the LEDs on the PB-507 trainer as described below. The output LEDs will always be defined as follows regardless of the trainer you use: b7  b6  b5  b4  b3  b2 b1  b0. (11.0592 MHz crystal oscillator)

 

• Turn on the b7 – b4 LEDs on for 1 seconds
• Then turn on b0 LED on for 2 seconds
• Then turn on b4, & b3 LEDs on for 0.5 second
• Repeat continuously

The only moves I can use is…

MOV

NOP

DJNZ

SJMP

something like this but I cant get the timing down.

 

MOV P1,#01H

MOV R0,#250

SUE:

NOP

NOP

NOP

NOP

NOP

DJNZ R0,SUE

MOV P1,#0H

MOV R0,#250

BOB:

NOP

NOP

NOP

NOP

NOP

DJNZ R0,BOB

SJMP JOE

[Ashutosh Bhatt]

this is very simple program

just you need is delay. make a delay loop of 0.5 sec – 500000 micro sec.

use it twice to get delay of 1 sec and four times to get delay of 4 sec thats it

[Author]

Posts