BCD 译码器
BCD 译码器/*Data Difinision*/
`define OUT_0 10'b00_0000_0001
`define OUT_1 10'b00_0000_0010
`define OUT_2 10'b00_0000_0100
`define OUT_3 10'b00_0000_1000
`define OUT_4 10'b00_0001_0000
`define OUT_5 10'b00_0010_0000
`define OUT_6 10'b00_0100_0000
`define OUT_7 10'b00_1000_0000
`define OUT_8 10'b01_0000_0000
`define OUT_9 10'b10_0000_0000
`define OUT_ERR 10'b00_0000_0000
/* DECORDER */
module DEC ( IN, OUT, ERR );
input IN;
output OUT;
output ERR;
assign {ERR, OUT} = FUNC_DEC ( IN );
function FUNC_DEC;
input IN;
case ( IN )
0:FUNC_DEC = {1'b0, `OUT_0};
1:FUNC_DEC = {1'b0, `OUT_1};
2:FUNC_DEC = {1'b0, `OUT_2};
3:FUNC_DEC = {1'b0, `OUT_3};
4:FUNC_DEC = {1'b0, `OUT_4};
5:FUNC_DEC = {1'b0, `OUT_5};
6:FUNC_DEC = {1'b0, `OUT_6};
7:FUNC_DEC = {1'b0, `OUT_7};
8:FUNC_DEC = {1'b0, `OUT_8};
9:FUNC_DEC = {1'b0, `OUT_9};
default:FUNC_DEC = {1'b1, `OUT_ERR};
endcase
endfunction
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