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AFera1's avatar
AFera1
Icon for New Contributor rankNew Contributor
6 years ago

Error Code (121014): Net HEX2, HEX1, HEX0 cannot be assigned to more than one value. If someone can help that would be greatly appreciated.

module bcd_seven_seg(SW,HEX0,HEX1,HEX2,LEDG);

input [9:0] SW;

output [6:0] HEX0, HEX1, HEX2;

output [9:0] LEDG;

wire [6:0] hex0,hex1,hex2;

assign HEX0 = ~hex0;

assign HEX1 = ~hex1;

assign HEX2 = ~hex2;

bcd_seven_seg_behavioral u0(SW[3:0],HEX0);

bcd_seven_seg_behavioral u1(SW[7:4],HEX1);

bcd_seven_seg_behavioral u2(SW[9:8],HEX2);

endmodule

module bcd_seven_seg_behavioral(bcd,hex);

input [3:0] bcd;

output reg [6:0] hex;

always @ (bcd) begin

case(bcd)

4'b0000: hex <= 7'b0111111;

4'b0001: hex <= 7'b0000110;

4'b0010: hex <= 7'b1011011;

4'b0011: hex <= 7'b1001111;

4'b0100: hex <= 7'b1100110;

4'b0101: hex <= 7'b1101101;

4'b0110: hex <= 7'b1111101;

4'b0111: hex <= 7'b0000111;

4'b1000: hex <= 7'b1111111;

4'b1001: hex <= 7'b1100111;

4'b1010: hex <= 7'b1110111;

4'b1011: hex <= 7'b1111100;

4'b1100: hex <= 7'b0111001;

4'b1101: hex <= 7'b1011110;

4'b1110: hex <= 7'b1111001;

4'b1111: hex <= 7'b1110001;

endcase

end

endmodule

1 Reply

  • ak6dn's avatar
    ak6dn
    Icon for Regular Contributor rankRegular Contributor
    6 years ago

    On these lines:

    bcd_seven_seg_behavioral u0(SW[3:0],HEX0);

    bcd_seven_seg_behavioral u1(SW[7:4],HEX1);

    bcd_seven_seg_behavioral u2(SW[9:8],HEX2);

    the second arg HEXn is an OUTPUT of this function.

    And nowhere do you assign a value to 'hexN' before using it.

    I think the above lines want to be:

    bcd_seven_seg_behavioral u0(SW[3:0],hex0);

    bcd_seven_seg_behavioral u1(SW[7:4],hex1);

    bcd_seven_seg_behavioral u2(SW[9:8],hex2);

    otherwise you are assigning a value to HEXn via the assign statements, and also the bcd_seven_seg_behavioral module output.

    Note verilog is a case sensitive language.