Question

这是我的代码。但是当我编译它时，我收到了错误消息。

我的代码怎么了？

// seg7dec.v
module seg7dec (
input [3:0] val,
output reg [6:0] seg // from MSB  A, B, C, D, E, F, G 
);
always @(*)
begin
case (val[3:0])
4'h0: seg[6:0] = 7'b111_1110;
4'h1: seg[6:0] = 7'b011_0000;
4'h2: seg[6;0] = 7'b110_1101;                                                                 
4'h3: seg[6;0] = 7'b111_1001;
4'h4: seg[6;0] = 7'b011_0011;         
4'h5: seg[6;0] = 7'b101_1011; 
4'h6: seg[6;0] = 7'b101_1111; 
4'h7: seg[6;0] = 7'b111_0000;
4'h8: seg[6;0] = 7'b111_1111;
4'h9: seg[6;0] = 7'b111_1011;
4'ha: seg[6;0] = 7'b111_1101;
4'hb: seg[6;0] = 7'b001_1111;
4'hc: seg[6;0] = 7'b100_1110;
4'hd: seg[6;0] = 7'b100_1111;
4'hg: seg[6;0] = 7'b111_1011;
default: seg[6:0] = 7'b100_0111 ; // 4'hF
endcase
end
endmodule

这些是错误消息：

;'.
** Error: (vlog-13069) C:/Intel/seg7dec.v(14): near ";": syntax error, unexpected ';'.

** Error: (vlog-13069) C:/Intel/seg7dec.v(15): near ";": syntax error, unexpected ';'.

** Error: (vlog-13069) C:/Intel/seg7dec.v(16): near ";": syntax error, unexpected ';'.

** Error: (vlog-13069) C:/Intel/seg7dec.v(17): near ";": syntax error, unexpected ';'.

** Error: (vlog-13069) C:/Intel/seg7dec.v(18): near ";": syntax error, unexpected ';'.

** Error: (vlog-13069) C:/Intel/seg7dec.v(19): near ";": syntax error, unexpected ';'.

** Error: (vlog-13069) C:/Intel/seg7dec.v(20): near ";": syntax error, unexpected ';'.

** Error: (vlog-13069) C:/Intel/seg7dec.v(21): near ";": syntax error, unexpected ';'.

** Error: (vlog-13069) C:/Intel/seg7dec.v(22): near ";": syntax error, unexpected ';'.

** Error: (vlog-13057) C:/Intel/seg7dec.v(23): Expecting numeric digits.

** Error: (vlog-13069) C:/Intel/seg7dec.v(23): near "g": syntax error, unexpected IDENTIFIER, expecting ':'.

Answer 1

从一行

4'h2: seg[6;0] = 7'b110_1101;

您已添加;而不是：在6到0之间。

Answer 2

使用部分选择时，格式应为[MSB:LSB]。
因此，您需要将seg[6;0]更改为seg[6:0]。
或者，由于seg被声明为7位宽，因此无需在[6:0]上添加seg。
最后一个4'hg应该是4'he。

不断收到这些错误消息..编译错误

2 个答案: