rgbramps.tdf

基于fpga的屏幕测试程序

--To generate rgbramps
--for PDP measurement
--On the base of EF and AVD's original work
--Zhang Yuning
--2005.4.12

include "fran_pg.inc";
include "lpm_compare.inc";

SUBDESIGN rgbramps
(	VPS_0[10..0]			: INPUT;
	VPS_1[10..0]			: INPUT;
	VPS_2[10..0]			: INPUT;
	VPS_3[10..0]			: INPUT;
	clk						: INPUT;

	act_hcounter[10..0]     : INPUT;
	act_vcounter[10..0]		: INPUT;
	red_out[9..0]			: OUTPUT;
	green_out[9..0]			: OUTPUT;
	blue_out[9..0]			: OUTPUT;	
)


VARIABLE


	start_ramp1 : lpm_compare WITH (
				LPM_WIDTH = 11,
				ONE_INPUT_IS_CONSTANT = "YES",
				LPM_REPRESENTATION = "UNSIGNED",
				LPM_PIPELINE = 2
				);

	start_ramp2 : lpm_compare WITH (
				LPM_WIDTH = 11,
				ONE_INPUT_IS_CONSTANT = "YES",
				LPM_REPRESENTATION = "UNSIGNED",
				LPM_PIPELINE = 2
				);

	start_ramp3 : lpm_compare WITH (
				LPM_WIDTH = 11,
				ONE_INPUT_IS_CONSTANT = "YES",
				LPM_REPRESENTATION = "UNSIGNED",
				LPM_PIPELINE = 2
				);

	start_ramp4 : lpm_compare WITH (
				LPM_WIDTH = 11,
				ONE_INPUT_IS_CONSTANT = "YES",
				LPM_REPRESENTATION = "UNSIGNED",
				LPM_PIPELINE = 2
				);
	rgb_compare : lpm_compare WITH (
			LPM_WIDTH = 11,
			ONE_INPUT_IS_CONSTANT = "YES",
			LPM_REPRESENTATION = "UNSIGNED",
			LPM_PIPELINE = 2
			);
				
	ramp1					:	SRFF;
	ramp2					:	SRFF;
	ramp3					:	SRFF;
	ramp4					:	SRFF;
	red_active              :   NODE;
	gre_active              :   NODE;
	blu_active              :   NODE;
	hcounter[10..0]         :   NODE;

BEGIN
	
	start_ramp1.dataa[10..0] = act_vcounter[10..0];
	start_ramp1.datab[10..0] = VPS_0[];
	start_ramp1.clock = clk;

	start_ramp2.dataa[10..0] = act_vcounter[10..0];
	start_ramp2.datab[10..0] = VPS_1[];
	start_ramp2.clock = clk;

	start_ramp3.dataa[10..0] = act_vcounter[10..0];
	start_ramp3.datab[10..0] = VPS_2[];
	start_ramp3.clock = clk;

	start_ramp4.dataa[10..0] = act_vcounter[10..0];
	start_ramp4.datab[10..0] = VPS_3[];
	start_ramp4.clock = clk;

	ramp1.clk = clk;
	ramp1.S   = start_ramp1.aeb;
	ramp1.R   = start_ramp2.aeb;

	ramp2.clk = clk;
	ramp2.S   = start_ramp2.aeb;
	ramp2.R   = start_ramp3.aeb;

	ramp3.clk = clk;
	ramp3.S   = start_ramp3.aeb;
	ramp3.R   = start_ramp4.aeb;

	ramp4.clk = clk;
	ramp4.S   = start_ramp4.aeb;
	ramp4.R   = start_ramp1.aeb;

	red_active = ramp1.q OR ramp4.q;
	gre_active = ramp2.q OR ramp4.q;
	blu_active = ramp3.q OR ramp4.q;

    hcounter[10..0]= act_hcounter[10..0];  -- -3;

	rgb_compare.clock		= clk;
	rgb_compare.dataa[] = hcounter[10..0];
	rgb_compare.datab[] = 1024;

	CASE rgb_compare.alb IS
		WHEN 1 =>
		 red_out[9..0]  = red_active AND hcounter[9..0] ; 
		 green_out[9..0]= gre_active AND hcounter[9..0] ;
		 blue_out[9..0] = blu_active AND hcounter[9..0] ;
		WHEN 0 =>
		 red_out[9..0]  = red_active AND 1023 ; 
		 green_out[9..0]= gre_active AND 1023 ;
		 blue_out[9..0] = blu_active AND 1023 ;
	END CASE;
	
	
END;