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Honored ContributorSOPC New Component Control 7 Segment LED
Hi every body,
I'm a newbie in SoPC. I use DE2. I want to create a new component connect to Avalon Switch Fabric (ASF). This component uses to control 7 segment LED. ASF will create write signal and send writedata to component. Base on writedata my component will control to show on 7 segment LED. example:+ when receive writedata [15:0]= 1000 0000 0000 1010 this component will output character "A" (1010) to HEX7 + when receive writedata [15:0]= 0010 0000 0000 1100 this component will output character "C" (1100) to HEX5 + when receive writedata [15:0]= 0000 0001 0000 1001 this component will output character "9" (1001) to HEX0 .... I write my code, but I don't know it is correct or not. Hope you can help me to correct my code. Thank you. my code:
module control_led7seg(
clk,
reset_n,
cs,
write,
write_data
);
input clk;
input reset_n;
input cs; // Chip select
input write; // Write request
//write_data: 16-bit --> HHHH HHHH xxxx DDDD
//8 bit H to indicate Led 7 segment i
//4 bit D to indicate data written to HEX i
input write_data; // Write data: 0 1 2 3 4 5 6 7 8 9 a b c d e f
reg write_data;
reg seg;//Thanh ghi chua data dc write ra HEX
reg HEX0, HEX1, HEX2, HEX3, HEX4, HEX5, HEX6, HEX7;
always @ (posedge clk)
begin
if(~reset_n)
begin
HEX0 <= 'h0;
HEX1 <= 'h0;
HEX2 <= 'h0;
HEX3 <= 'h0;
HEX4 <= 'h0;
HEX5 <= 'h0;
HEX6 <= 'h0;
HEX7 <= 'h0;
end
else
begin
if(cs)
begin
if (write)
begin
case (write_data)
4'h0: seg = 7'b1000000;
4'h1: seg = 7'b1111001; // ---a----
4'h2: seg = 7'b0100100; // | |
4'h3: seg = 7'b0110000; // f b
4'h4: seg = 7'b0011001; // | |
4'h5: seg = 7'b0010010; // ---g----
4'h6: seg = 7'b0000010; // | |
4'h7: seg = 7'b1111000; // e c
4'h8: seg = 7'b0000000; // | |
4'h9: seg = 7'b0011000; // ---d----
4'ha: seg = 7'b0001000;
4'hb: seg = 7'b0000011;
4'hc: seg = 7'b1000110;
4'hd: seg = 7'b0100001;
4'he: seg = 7'b0000110;
4'hf: seg = 7'b0001110;
endcase
if (write_data == 1'b1)
HEX7 = seg;
else HEX7 = 7'b1000000
if (write_data == 1'b1)
HEX6 = seg;
else HEX6 = 7'b1000000
if (write_data == 1'b1)
HEX5 = seg;
else HEX5 = 7'b1000000
if (write_data == 1'b1)
HEX4 = seg;
else HEX4 = 7'b1000000
if (write_data == 1'b1)
HEX3 = seg;
else HEX3 = 7'b1000000
if (write_data == 1'b1)
HEX2 = seg;
else HEX2 = 7'b1000000
if (write_data == 1'b1)
HEX1 = seg;
else HEX1 = 7'b1000000
if (write_data == 1'b1)
HEX0 = seg;
else HEX0 = 7'b1000000
end
end
end
end
endmodule
