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module vga_ctrl(
sclk,
rst_n,
hsync,
vsync,
rgb_data
);
input sclk;
input rst_n;
output hsync;
output vsync;
output [7:0]rgb_data;
reg clk;
reg hsync;
reg vsync;
reg [9:0]cnt_h;
reg [9:0]cnt_v;
reg [7:0]rgb_data;
/* wire [7:0]out_data;
reg [13:0]rd_addr; */
/* my_pll my_pll_inst (
.inclk0 ( sclk ),
.c0 ( clk )
);
*/
always@(posedge sclk or negedge rst_n)
if(rst_n==1'b0)
clk<=0;
else
clk<=~clk;
//cnt_h;
always@(posedge clk or negedge rst_n)
if(rst_n==1'b0)
cnt_h<=0;
else if(cnt_h==799)
cnt_h<=0;
else
cnt_h<=cnt_h+1;
always@(posedge clk or negedge rst_n)
if(rst_n==1'b0)
cnt_v<=0;
else if(cnt_v==524&&cnt_h==799)
cnt_v<=0;
else if(cnt_h==799)
cnt_v<=cnt_v+1;
always@(posedge clk or negedge rst_n)
if(rst_n==1'b0)
hsync<=1;
else if(cnt_h==95)
hsync<=1;
else if(cnt_h==799)
hsync<=0;
always@(posedge clk or negedge rst_n)
if(rst_n==1'b0)
vsync<=1;
else if(cnt_h==799&&cnt_v==1)
vsync<=1;
else if(cnt_h==799&&cnt_v==524)
vsync<=0;
always@(posedge clk or negedge rst_n)
if(rst_n==1'b0)
rgb_data<=0;
else if( cnt_h>=143&&cnt_h<243&&cnt_v>=34&&cnt_v<134)
rgb_data<=8'b0011_1111;
else if(cnt_h>=143&&cnt_h<783&&cnt_v>=34&&cnt_v<194)
rgb_data<=8'b111_000_00;
else if(cnt_h>=143&&cnt_h<783&&cnt_v>=194&&cnt_v<354)
rgb_data<=8'b000_111_00;
else if(cnt_h>=143&&cnt_h<783&&cnt_v>=354&&cnt_v<514)
rgb_data<=8'b000_000_11;
else
rgb_data<=8'b0;
/* my_ram my_ram_inst (
.clock ( clk ),
.data ( 0 ),
.rdaddress ( rd_addr ),
.wraddress ( 0 ),
.wren ( 0 ),
.q ( out_data )
); */
/*
always@(posedge clk or negedge rst_n)
if(rst_n==1'b0)
rd_addr<=0;
else if(cnt_h>=143&&cnt_h<243&&cnt_v>=34&&cnt_v<134)
begin
if(rd_addr==9999)
rd_addr<=0;
else
rd_addr<=rd_addr+1;
end
*/
endmodule

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