how to show the data on led

riya · Joined: 15 Feb 2012 Posts: 10

hello,
I am new to this forum. I am doing the project gsm based notice board on led display.
Help me how to start the coding part. I am using pic16f877a
thanks everyone.

How to use Johnson counter to shift the led matrix display?

temtronic · Posted: Wed Feb 15, 2012 6:43 am

Start by getting the basic hardware to run right ! Cut code for the basic 'blinking LED' and 'hello World' programs.
Every line of code you cut, you learn.
Be sure to save all versions of your code.Save the old,make a copy, edit the copy,try it, save it, repeat as required until your program does what you want.

riya · Joined: 15 Feb 2012 Posts: 10

Thank you for the reply.
I tried like this:

riya · Joined: 15 Feb 2012 Posts: 10

I started the program by flashing the LED.
Now I have to write the main code.
My aim is to send a message from gsm modem that has to be displayed in a bunch of leds.
How to start ?

temtronic · Posted: Thu Feb 16, 2012 5:37 pm

Standard 'scientific approach'....break down the project into modules or sections that you can do.
Start by downloading the specs on the gsm modem and get the PIC to talk/rcv from it, verify that command 'x' does what it says....
...maybe display command/results on a terminal program in a PC or on a local LCD( on the PIC project board)
'bunch of LEDs' is vague....how many,arrangement,type,power levels,etc....type of data to be displayed? form(hex,ASCII,??)

riya · Joined: 15 Feb 2012 Posts: 10

My requirement is to display a message in group of leds arranged in a 5*7(5 rows and 7 columns) matrix form. Initially the message is sent from a remote mobile phone to the gsm modem. Now the message is from gsm modem to control unit to led display. The data is displayed in English font. i require small , large font letters(26+26=52) and some special characters.

Thank you