On Thu, 2011-04-21 at 01:45 -0400, V G wrote:
> This is extremely frustrating. I've googled for an hour and can't find AN=
Y
> Verilog example projects for this board. I can't get ANYTHING to compile.=
 I
> just want to blink an LED. I DON'T want to start off with VHDL but all th=
e
> examples I found were VHDL.
>=20
> I found the schematic for the board, but it is not useful until I can get=
 a
> very simple configuration working.
>=20
> All I want to do right now is blink an LED, or light up an LED when a but=
ton
> is pressed, but I have no idea how. I learn best by examples.
>=20
> Help, anyone!?!?!??!?!!!
>=20
> AAAAAAAAAAAAAAAAAAAAAAAARRRRRRRRRRRGHHHHHHHHHHHHHHHHH!!!!!!!!!!!!!!!

Try this:



/* Blinks LED when button is pressed, assumes LED is active high and
BUTTON is active high */
/* make sure you set your pin constraints to match whatever pins CLK,
BUTTON and LED are on. */


module blinkLED (input CLK, input BUTTON, output LED);


/* change to whatever is necessary to make the LED blink at a human
rate. For example, if your clock is 20MHz, and you want the LED to blick
once per second, set your counter to reset at 10million. */

`define MAXCOUNT 32'd10000000

reg [32:0] counter;
reg int_LED;

always @ (posedge CLK)
begin
	if (counter >=3D MAXCOUNT)
	begin
		counter <=3D 0;
		int_LED <=3D !int_LED;
	end
	else
	begin
		counter <=3D counter + 1;
		int_LED <=3D int_LED;
	end
end

always @ (posedge CLK)
begin
	if (BUTTON)
	begin
		LED <=3D int_LED;
	end
	else
	begin
		LED <=3D 0;
	end
end

endmodule
	=09


--=20
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