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Update AHBVGASYS.sv to SystemVerilog and style

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Aadi Desai 2022-11-07 13:57:19 +00:00
parent 018013d3c8
commit 0d4099ce15
1 changed files with 93 additions and 114 deletions
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167
rtl/AHB_VGA/AHBVGASYS.sv
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@ -3,7 +3,7 @@
// // // //
//Copyright (c) 2012, ARM All rights reserved. // //Copyright (c) 2012, ARM All rights reserved. //
// // // //
//THIS END USER LICENCE AGREEMENT (“LICENCE”) IS A LEGAL AGREEMENT BETWEEN // //THIS END USER LICENCE AGREEMENT (<EFBFBD>LICENCE<EFBFBD>) IS A LEGAL AGREEMENT BETWEEN //
//YOU AND ARM LIMITED ("ARM") FOR THE USE OF THE SOFTWARE EXAMPLE ACCOMPANYING // //YOU AND ARM LIMITED ("ARM") FOR THE USE OF THE SOFTWARE EXAMPLE ACCOMPANYING //
//THIS LICENCE. ARM IS ONLY WILLING TO LICENSE THE SOFTWARE EXAMPLE TO YOU ON // //THIS LICENCE. ARM IS ONLY WILLING TO LICENSE THE SOFTWARE EXAMPLE TO YOU ON //
//CONDITION THAT YOU ACCEPT ALL OF THE TERMS IN THIS LICENCE. BY INSTALLING OR // //CONDITION THAT YOU ACCEPT ALL OF THE TERMS IN THIS LICENCE. BY INSTALLING OR //
@ -34,23 +34,20 @@
// OF DOUBT, NO PATENT LICENSES ARE BEING LICENSED UNDER THIS LICENSE AGREEMENT.// // OF DOUBT, NO PATENT LICENSES ARE BEING LICENSED UNDER THIS LICENSE AGREEMENT.//
////////////////////////////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////////////////////////
module AHBVGA
module AHBVGA( ( input wire HCLK
input wire HCLK, , input wire HRESETn
input wire HRESETn, , input wire [31:0] HADDR
input wire [31:0] HADDR, , input wire [31:0] HWDATA
input wire [31:0] HWDATA, , input wire HREADY
input wire HREADY, , input wire HWRITE
input wire HWRITE, , input wire [1:0] HTRANS
input wire [1:0] HTRANS, , input wire HSEL
input wire HSEL, , output wire [31:0] HRDATA
, output wire HREADYOUT
output wire [31:0] HRDATA, , output wire HSYNC
output wire HREADYOUT, , output wire VSYNC
, output wire [7:0] RGB
output wire HSYNC,
output wire VSYNC,
output wire [7:0] RGB
); );
//Register locations //Register locations
localparam IMAGEADDR = 4'hA; localparam IMAGEADDR = 4'hA;
@ -79,13 +76,11 @@ module AHBVGA(
wire sel_image; wire sel_image;
reg [7:0] cin; reg [7:0] cin;
always_ff @(posedge HCLK)
always @(posedge HCLK) if(HREADY) begin
if(HREADY) last_HADDR <= HADDR;
begin
last_HADDR <= HADDR;
last_HWRITE <= HWRITE; last_HWRITE <= HWRITE;
last_HSEL <= HSEL; last_HSEL <= HSEL;
last_HTRANS <= HTRANS; last_HTRANS <= HTRANS;
end end
@ -93,86 +88,71 @@ module AHBVGA(
assign HREADYOUT = ~scroll; assign HREADYOUT = ~scroll;
//VGA interface: control the synchronization and color signals for a particular resolution //VGA interface: control the synchronization and color signals for a particular resolution
VGAInterface uVGAInterface ( VGAInterface uVGAInterface
.CLK(HCLK), ( .CLK (HCLK)
.COLOUR_IN(cin), , .COLOUR_IN (cin)
.cout(RGB), , .cout (RGB)
.hs(HSYNC), , .hs (HSYNC)
.vs(VSYNC), , .vs (VSYNC)
.addrh(pixel_x), , .addrh (pixel_x)
.addrv(pixel_y) , .addrv (pixel_y)
); );
//VGA console module: output the pixels in the text region //VGA console module: output the pixels in the text region
vga_console uvga_console( vga_console uvga_console
.clk(HCLK), ( .clk (HCLK)
.resetn(HRESETn), , .resetn (HRESETn)
.pixel_x(pixel_x), , .pixel_x (pixel_x)
.pixel_y(pixel_y), , .pixel_y (pixel_y)
.text_rgb(console_rgb), , .text_rgb (console_rgb)
.font_we(console_write), , .font_we (console_write)
.font_data(console_wdata), , .font_data (console_wdata)
.scroll(scroll) , .scroll (scroll)
); );
//VGA image buffer: output the pixels in the image region //VGA image buffer: output the pixels in the image region
vga_image uvga_image( vga_image uvga_image
.clk(HCLK), ( .clk (HCLK)
.resetn(HRESETn), , .resetn (HRESETn)
.address(last_HADDR[15:2]), , .address (last_HADDR[15:2])
.pixel_x(pixel_x), , .pixel_x (pixel_x)
.pixel_y(pixel_y), , .pixel_y (pixel_y)
.image_we(image_write), , .image_we (image_write)
.image_data(image_wdata), , .image_data (image_wdata)
.image_rgb(image_rgb) , .image_rgb (image_rgb)
); );
assign sel_console = (last_HADDR[23:0]== 12'h000000000000); assign sel_console = (last_HADDR[23:0] == 12'h000000000000);
assign sel_image = (last_HADDR[23:0] != 12'h000000000000); assign sel_image = (last_HADDR[23:0] != 12'h000000000000);
//Set console write and write data //Set console write and write data
always @(posedge HCLK, negedge HRESETn) always_ff @(posedge HCLK, negedge HRESETn)
begin if(!HRESETn) begin
if(!HRESETn) console_write <= 0;
begin console_wdata <= 0;
console_write <= 0; end else if (last_HWRITE & last_HSEL & last_HTRANS[1] & HREADYOUT & sel_console) begin
console_wdata <= 0; console_write <= 1'b1;
end console_wdata <= HWDATA[7:0];
else if(last_HWRITE & last_HSEL & last_HTRANS[1] & HREADYOUT & sel_console) end else begin
begin console_write <= 1'b0;
console_write <= 1'b1; console_wdata <= 0;
console_wdata <= HWDATA[7:0]; end
end
else
begin
console_write <= 1'b0;
console_wdata <= 0;
end
end
//Set image write and image write data //Set image write and image write data
always @(posedge HCLK, negedge HRESETn) always_ff @(posedge HCLK, negedge HRESETn)
begin if(!HRESETn) begin
if(!HRESETn) image_write <= 0;
begin image_wdata <= 0;
image_write <= 0; end else if(last_HWRITE & last_HSEL & last_HTRANS[1] & HREADYOUT & sel_image) begin
image_wdata <= 0; image_write <= 1'b1;
end image_wdata <= HWDATA[7:0];
else if(last_HWRITE & last_HSEL & last_HTRANS[1] & HREADYOUT & sel_image) end else begin
begin image_write <= 1'b0;
image_write <= 1'b1; image_wdata <= 0;
image_wdata <= HWDATA[7:0]; end
end
else
begin
image_write <= 1'b0;
image_wdata <= 0;
end
end
//Select the rgb color for a particular region //Select the rgb color for a particular region
always @* always_comb
begin
if(!HRESETn) if(!HRESETn)
cin <= 8'h00; cin <= 8'h00;
else else
@ -180,7 +160,6 @@ module AHBVGA(
cin <= console_rgb ; cin <= console_rgb ;
else else
cin <= image_rgb; cin <= image_rgb;
end
endmodule endmodule