configurable_yuv_to_rgb.v

根据输出显示模式不同可以选择不同的色度转换模式

  else
	begin
	if(r5_wire >= 10'h314)
		r2_temp <= r5_wire - 10'h314;
	else
		r2_temp <= 12'h000;
	end

reg[11:0]	r2_temp_d1;
always @(posedge dclk or negedge ngreset)
  if(~ngreset)
	r2_temp_d1 <= 12'h000;
  else
	r2_temp_d1 <= r2_temp;	
/***********************    step1 end     ****************************/

/*********************************************************************/
// step2: Green
reg[10:0]	g2_1;
reg[8:0]	g2_2;
reg[7:0]	g2_3;
reg[4:0]	g2_4;
reg[6:0]	g2_5;
always @(posedge dclk or negedge ngreset)
  if(~ngreset)
	begin
	g2_1 <= 11'h7ff;
	g2_2 <= 9'h1ff;
	g2_3 <= 8'hff;
	g2_4 <= 5'h1f;
	g2_5 <= 7'h7f;
	end
  else
	begin
	g2_1 <= {1'b0,y_data,2'b00} + 10'h158;//+
	g2_2 <= {1'b0,u_data} + {1'b0,v_data};//-
	g2_3 <= {1'b0,v_data[7:1]} + {2'b0,v_data[7:2]};//-
	g2_4 <= {1'b0,v_data[7:4]} + {3'b000,v_data[7:6]};//-
	g2_5 <= {1'b0,u_data[7:2]} + {5'b00000,u_data[7:6]};//+
	end

reg[8:0]	g2_34;
reg[11:0]	g2_15;
always @(posedge dclk or negedge ngreset)
  if(~ngreset)
	begin
	g2_34 <= 9'h1ff;
	g2_15 <= 12'h3ff;
	end
  else
	begin
	g2_15 <= {1'b0,g2_1} + {5'b00000,g2_5};
	g2_34 <= {1'b0,g2_3} + {3'b000,g2_4};
	end
	
reg[9:0]	g2_d1;
always @(posedge dclk or negedge ngreset)
  if(~ngreset)
	g2_d1 <= 10'h3ff;
  else
	g2_d1 <= {1'b0,g2_2} + {1'b0,g2_34};
	
reg[11:0]	g2_temp;
always @(posedge dclk or negedge ngreset)
  if(~ngreset)
	g2_temp <= 12'h000;
  else
	if(g2_15>=g2_d1)
		g2_temp <= g2_15 - g2_d1;
	else
		g2_temp <= 12'h000;
/*******************      step2 end      ***************************/

/*******************      step3: blue convert start    **************/
reg[10:0]	b2_1;
reg[9:0]	b2_2;
reg[6:0]	b2_3;
always @(posedge dclk or negedge ngreset)
  if(~ngreset)
	begin
	b2_1 <= 11'h7ff;
	b2_2 <= 10'h3ff;
	b2_3 <= 7'h7f;
	end
  else
	begin	
	b2_1 <= {1'b0,y_data,2'b00} + {1'b0,u_data,2'b00};
	b2_2 <= {1'b0,u_data,1'b0} + {2'b00,u_data};
	b2_3 <= {5'b00000,u_data[7:6]} + {1'b0,u_data[7:2]};
	end

reg[10:0]	b2_d1;
always @(posedge dclk or negedge ngreset)
  if(~ngreset)
	b2_d1 <= 11'h7ff;
  else
	b2_d1 <= {1'b0,b2_2} + {4'b0000,b2_3};

reg[11:0]   b2_d2;
always @(posedge dclk or negedge ngreset)
  if(~ngreset)
        b2_d2 <= 12'hfff;
  else
        b2_d2 <= {1'b0,b2_d1} + {1'b0,b2_1};

reg[11:0]	b2_temp;
always @(posedge dclk or negedge ngreset)
  if(~ngreset)
	b2_temp <= 12'h000;
  else
	if(b2_d2 >= 10'h3a0)
		b2_temp <= b2_d2 - 10'h3a0;
	else
		b2_temp <= 12'h000;

reg[11:0]	b2_temp_d1;
always @(posedge dclk or negedge ngreset)
  if(~ngreset)
	b2_temp_d1 <= 12'h000;
  else
	b2_temp_d1 <= b2_temp;
/**************      step3  end     *********************/
/********************************************************/
//output
reg[9:0]	rout2_10,gout2_10,bout2_10;
always @(posedge dclk or negedge ngreset)
  if(~ngreset)
	begin
	rout2_10 <= 10'h000;
	gout2_10 <= 10'h000;
	bout2_10 <= 10'h000;
	end
  else
	begin
	if(r2_temp_d1 <=10'h3ff)
		rout2_10 <= r2_temp_d1[9:0];
	else
		rout2_10 <= 10'h3ff;
	
        if(g2_temp <=10'h3ff)
		gout2_10 <= g2_temp[9:0];
	else
		gout2_10 <= 10'h3ff;
	
	if(b2_temp_d1 <=10'h3ff)
		bout2_10 <= b2_temp_d1[9:0];
	else
		bout2_10 <= 10'h3ff;
	end
/*****************************************************************/

/***************************************************/
/*             converter3: for PC                  */
/***************************************************/

// step1:Red
reg[10:0]	r3_1;
reg[7:0]	r3_2;
always @(posedge dclk or negedge ngreset)
  if(~ngreset)
	begin
	r3_1 <= 11'h7ff;	
	r3_2 <= 8'hff;
	end
  else
	begin
	r3_1 <= {1'b0,y_data,2'b00} + {1'b0,v_data,2'b00};
	r3_2 <= {4'b0000,v_data[7:4]} + {1'b0,v_data[7:1]};
	end

reg[11:0]  r3_3;
always @(posedge dclk or negedge ngreset)
  if(~ngreset)
	r3_3 <= 12'hfff;
  else
	r3_3 <= {1'b0,r3_1} + {5'b00000,r3_2};

reg[11:0]	r3_temp_d1;
always @(posedge dclk or negedge ngreset)
  if(~ngreset)
	r3_temp_d1 <= 12'h000;
  else
	r3_temp_d1 <= r3_3;	
/***********************    step1 end     ****************************/

/*********************************************************************/
// step2: Green
reg[9:0]	g3_1;
reg[7:0]	g3_2;
reg[4:0]	g3_3;
reg[2:0]	g3_4;
reg[11:0]  g3_5;
always @(posedge dclk or negedge ngreset)
  if(~ngreset)
	begin
	g3_1 <= 10'h3ff;
	g3_2 <= 8'hff;
	g3_3 <= 5'h1f;
	g3_4 <= 3'h7;
	g3_5 <= 12'hfff;
	end
  else
	begin
	g3_1 <= {2'b00,u_data} + {1'b0,v_data,1'b0};//-
	g3_2 <= {1'b0,u_data[7:1]} + {2'b00,v_data[7:2]};//-
	g3_3 <= {1'b0,u_data[7:4]} + {2'b0,v_data[7:4]};//-
	g3_4 <= {1'b0,u_data[7:6]} + {1'b0,v_data[7:6]};//-
	g3_5 <= {2'b00,y_data,2'b00};
	end

reg[10:0]	g3_12;
reg[5:0]	g3_34;
always @(posedge dclk or negedge ngreset)
  if(~ngreset)
	begin
	g3_12 <= 11'h7ff;
	g3_34 <= 6'h2f;
	end
  else
	begin
	g3_12 <= {1'b0,g3_1} + {2'b00,g3_2};
	g3_34 <= {1'b0,g3_3} + {3'b000,g3_4};
	end
	
reg[11:0]	g3_d1;
always @(posedge dclk or negedge ngreset)
  if(~ngreset)
	g3_d1 <= 12'hfff;
  else
	g3_d1 <= {1'b0,g3_12} + {6'b000000,g3_34};
	
reg[11:0]	g3_temp;
always @(posedge dclk or negedge ngreset)
  if(~ngreset)
	g3_temp <= 12'h000;
  else
	if(g3_5 >= g3_d1)
		g3_temp <= g3_5 - g3_d1;
	else
		g3_temp <= 12'h000;
/*******************      step2 end      ***************************/

/*******************      step3: blue convert start    **************/
reg[10:0]	b3_1;
reg[9:0]	b3_2;
reg[6:0]	b3_3;
always @(posedge dclk or negedge ngreset)
  if(~ngreset)
	begin
	b3_1 <= 11'h7ff;
	b3_2 <= 10'h3ff;
	b3_3 <= 7'h7f;
	end
  else
	begin	
	b3_1 <= {u_data,3'b000};
	b3_2 <= {1'b0,y_data,2'b00} + {6'b000000,u_data[7:3]};
	end

reg[11:0]	b3_d1;
always @(posedge dclk or negedge ngreset)
  if(~ngreset)
	b3_d1 <= 12'hfff;
  else
	b3_d1 <= {1'b0,b3_1} + {4'b0000,b3_2};

reg[11:0]	b3_temp_d1;
always @(posedge dclk or negedge ngreset)
  if(~ngreset)
	b3_temp_d1 <= 12'h000;
  else
	b3_temp_d1 <= b3_d1;
/**************      step3  end     *********************/
/********************************************************/
//output
reg[9:0]	rout3_10,gout3_10,bout3_10;
always @(posedge dclk or negedge ngreset)
  if(~ngreset)
	begin
	rout3_10 <= 10'h000;
	gout3_10 <= 10'h000;
	bout3_10 <= 10'h000;
	end
  else
	begin
	if(r3_temp_d1 <=10'h3ff)
		rout3_10 <= r3_temp_d1[9:0];
	else
		rout3_10 <= 10'h3ff;
	
        if(g3_temp <=10'h3ff)
		gout3_10 <= g3_temp[9:0];
	else
		gout3_10 <= 10'h3ff;
	
	if(b3_temp_d1 <=10'h3ff)
		bout3_10 <= b3_temp_d1[9:0];
	else
		bout3_10 <= 10'h3ff;
	end
/*********************************************************************/
/***************************************/
/*          the final output           */
/***************************************/
reg[7:0]	rout_d1,gout_d1,bout_d1;
always @(posedge dclk or negedge ngreset)
if(~ngreset)
begin
	  rout_d1 <= 8'h00;
	  gout_d1 <= 8'h00;
	  bout_d1 <= 8'h00;
end
else
begin
case(scontrl)
2'b00:
begin
		rout_d1 <= rout1_10[9:2];
		gout_d1 <= gout1_10[9:2];
		bout_d1 <= bout1_10[9:2];
end
2'b01:
begin
		rout_d1 <= rout2_10[9:2];
		gout_d1 <= gout2_10[9:2];
		bout_d1 <= bout2_10[9:2];
end	
default:
begin
		rout_d1 <= rout3_10[9:2];
		gout_d1 <= gout3_10[9:2];
		bout_d1 <= bout3_10[9:2];
end	
endcase
end

wire[7:0] rout8,gout8,bout8;
assign rout8 = rout_d1;
assign gout8 = gout_d1;
assign bout8 = bout_d1;
endmodule