Flashing LED Program

[AWJay]

Hi,

I have got a development board with an 18F8722 on it. The bored comes with a built in LED for testing.
I'm trying to write a program to flash the LED. I written a whole host of different programs and none of them work.
The board has the LED connect to RH0 and in my code am using #define <htc.h> which contains the link to the pic18f8722 hex file which has the ports adress on it.
Does anyone have any programs that are similar to this or knows how to write it because none of mine are working when I am wiring to the board.

Jay

[sean]

#define <htc.h>

Are you really using #define, or was this just a typo? Because you almost certainly mean #include. #include is used when you want to include source from another file, #define is used for defining constants or macros.Try that and see if that changes anything.

[MK27]

Also you need to mention your OS.

[itCbitC]

Can you post the code you have written so far; is it in C or assembly?

[AWJay]

Yeh sorry I meant Include not define.

This is the code that the seller of the boards has actually sent to me.

#include	<htc.h>

void Delay(unsigned long cntr) {
	while (--cntr != 0);
}

// main function
void main( void ) {


	INTCON 	= 0x0;			// Disable inerupt
	CMCON 	= 0x07;		    	// Comparators Off
	ADCON1  = 0x06;			// Port as Digital IO
	TRISA0 	= 0;			// Led pin as output
	CVRCON  = 0;


	// loop forever - echo 
	while(1) {

		// Toggle led
		RH0 ^= 1;
		// Simple delay
		Delay(50000);
	}
}

[Salem]

Does the supplied program work on the board?

> I written a whole host of different programs and none of them work.
Programming at this level can be like that - don't worry too much.
There is no safety net, and it takes no prisoners. You have to be very sure that what you have will work (rather than will probably work, but I've got a debugger to help).

You need to start out with really small baby steps (say just change the frequency of the LED).
Build up slowly at first.


Does the board come with a host emulator?
Such a thing would allow you to run your code on your PC, and probably give you some decent debug into the bargain.