8位二进制转BCD码，输入125，怎么没有输出呢？
如题 （附上module和测试testbench）module bintobcd
(
clk, rstn, Data_Bin,
// Hex_8, Hex_7, Hex_6, Hex_5,
// Hex_4,
Hex_3, Hex_2, Hex_1
);
input clk, rstn;
inputData_Bin;
// output Hex_8, Hex_7, Hex_6, Hex_5;
output //Hex_4,
Hex_3, Hex_2, Hex_1;
// reg Hex_8, Hex_7, Hex_6, Hex_5;
reg //Hex_4,
Hex_3, Hex_2, Hex_1;
/************************ BCD转换算法 *************************/
function Correct;
inputDecade;
begin
Correct = ( Decade >= 4'd5 ) ? ( Decade + 4'd3 ) : Decade;
end
endfunction
/*************************************************************/
// integer Cnt = 33;
reg Cnt;
reg BCD;
reg Bin_input;
reg //BCD_8_I, BCD_7_I, BCD_6_I, BCD_5_I,
//BCD_4_I,
BCD_3_I, BCD_2_I, BCD_1_I;
always @ ( posedge clk or negedge rstn )
begin
if( !rstn )
begin
Cnt = 6'd9;
BCD = 12'd0;
Bin_input = 8'd0;
// BCD_8_I= 4'b0000;
// BCD_7_I= 4'b0000;
// BCD_6_I= 4'b0000;
// BCD_5_I= 4'b0000;
// BCD_4_I= 4'b0000;
BCD_3_I= 4'b0000;
BCD_2_I= 4'b0000;
BCD_1_I= 4'b0000;
end
else
begin
if( Cnt == 6'd9 )
begin
Bin_input = Data_Bin;
Cnt = Cnt - 1'b1;
end
else if( Cnt == 0 )
begin
// BCD_8_I = BCD;
// BCD_7_I = BCD;
// BCD_6_I = BCD;
// BCD_5_I = BCD;
// BCD_4_I = BCD;
BCD_3_I = BCD;
BCD_2_I = BCD;
BCD_1_I = BCD;
// Hex_8 = BCD_8_I;
// Hex_7 = BCD_7_I;
// Hex_6 = BCD_6_I;
// Hex_5 = BCD_5_I;
// Hex_4 = BCD_4_I;
Hex_3 = BCD_3_I;
Hex_2 = BCD_2_I;
Hex_1 = BCD_1_I;
end
else
begin
BCD = Correct( BCD );
BCD = Correct( BCD );
BCD= Correct( BCD );
// BCD = Correct( BCD );
// BCD = Correct( BCD );
// BCD = Correct( BCD );
// BCD = Correct( BCD );
// BCD = Correct( BCD );
Cnt = Cnt - 1'b1;
BCD = ( BCD << 1 );
BCD = Bin_input ;
Bin_input = Bin_input << 1;
end
end
end
/*************************************************************/
endmodule
`timescale 1 ps/ 1 ps
module bintobcd_vlg_tst();
reg Data_Bin;
reg clk;
reg rstn;
// wires
wire Hex_1;
wire Hex_2;
wire Hex_3;
// wire Hex_4;
// wire Hex_5;
// wire Hex_6;
// wire Hex_7;
// wire Hex_8;
/**************************************/
bintobcd i1
(
.clk( clk ),
.rstn( rstn ),
.Data_Bin( Data_Bin ),
.Hex_1( Hex_1 ),
.Hex_2( Hex_2 ),
.Hex_3( Hex_3 )
// .Hex_4( Hex_4 ),
// .Hex_5( Hex_5 ),
// .Hex_6( Hex_6 ),
// .Hex_7( Hex_7 ),
// .Hex_8( Hex_8 )
);
/**************************************/
initial
begin
clk = 0;
rstn = 1;
#10 rstn = 0;
#10 rstn = 1;
end
always #10 clk = ~clk;
/**************************************/
always @ ( posedge clk or negedge rstn )
if( !rstn )
begin
Data_Bin = 8'd0;
end
else
begin
Data_Bin = 8'd125;
end
/**************************************/
endmodule 问题已解决！
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