moving message display

[halee awan]

hi to every one

i want to make a single/doble line led moving message dispaly
using 8051 micro controller .but i have no information or idea how i can do it ...

 

[sahn001]

Just use timer interrupt.
Check the pseudo codes below..



//-------------------------------------------------
char dispBuffer[MessageSize];


//Timer interrupt 500mSec
void Timer1()
{

printf(" "); // Clear LCD Line

strcpy (dispBuffer, dispBuffer+1, MessageSize-1); // Scroll n-1 Byte
strncat (dispBuffer, dispBuffer,1); // Add 1st char at the end
dispBuffer[MessageSize] = 0; // String Termination

printf (dispBuffer); // display New Messeage

}

//------------------------------------------------------


the message should be initialized in a main routine at the very beginning..

Timer routine can also be replaced into simple loop using loop-delay in it.

You may process any user input to break out of the loop then.

Try this and have fun...