New ContributorHello, I am writing a verilog code from my DE10-Lite Board to scroll the a word or number but keep having errors. Would you be able to help?
module DE10_LITE_Default(
input clock, reset,
input HEX0, HEX1, HEX2, HEX3, //the 4 inputs for each display
output a, b, c, d, e, f, g, dp, //the individual LED output for the seven segment along with the digital point
output [3:0] an // the 4 bit enable signal
);
localparam N = 18;
reg [N-1:0]count; //the 18 bit counter which allows us to multiplex at 1000Hz
always @ (posedge clock or posedge reset)
begin
if (reset)
count <= 0;
else
count <= count + 1;
end
reg [6:0]sseg_temp; //the 7 bit register to hold the data to output ==== Changed from 'reg' ====
reg [3:0]an_temp; //register for the 4 bit enable
always @ (*)
begin
case(count[N-1:N-2]) //using only the 2 MSB's of the counter
2'b00 : //When the 2 MSB's are 00 enable the fourth display
begin
sseg = HEX0;
an_temp = 4'b1110;
end
2'b01: //When the 2 MSB's are 01 enable the third display
begin
sseg = HEX1;
an_temp = 4'b1101;
end
2'b10: //When the 2 MSB's are 10 enable the second display
begin
sseg = HEX2;
an_temp = 4'b1011;
end
2'b11: //When the 2 MSB's are 11 enable the first display
begin
sseg = HEX3;
an_temp = 4'b0111;
end
endcase
end
assign an = an_temp;
reg [6:0] HEX_Display; // 7 bit register to hold the binary value of each input given
always @ (*)
begin
case(sseg)
4'd0 : HEX_Display = 7'b0111111; //to display dash
4'd1 : HEX_Display = 7'b0000001; //to display 0
4'd2 : HEX_Display = 7'b1001111; //to display 1
4'd3 : HEX_Display = 7'b0110000; //to display E
4'd4 : HEX_Display = 7'b1000010; //to display d
4'd5 : HEX_Display = 7'b0111111; //to display dash
//4'd6 : sseg_temp = 7'b0000010; //to display 6
// 4'd7 : sseg_temp = 7'b1111000; //to display 7
// 4'd8 : sseg_temp = 7'b0000000; //to display 8
//4'd9 : sseg_temp = 7'b0010000; //to display 9
//default : sseg_temp = 7'b0111111; //dash
endcase
end
assign HEX_Display = {g, f, e, d, c, b, a} ; //concatenate the outputs to the register, this is just a more neat way of doing this.
// I could have done in the case statement: 4'd0 : {g, f, e, d, c, b, a} = 7'b1000000;
// its the same thing.. write however you like it
assign dp = 1'b1; //since the decimal point is not needed, all 4 of them are turned off
endmodule
