【求助】一个小程序 verilog写的,功能仿真正确(modelsim 仿的),但是时序仿真不对(quartus
module fillzero(datain,inEn,reset,CLK_I,CLK_O,dataout,fill_rdy);input datain;
input inEn; //
input reset;
input CLK_I;
input CLK_O;
output dataout;
output fill_rdy;
reg BUF2_RDY;
reg i;
reg j;
//reg BUF1;
reg BUF2;
reg dataout;
reg fill_rdy;
/*always @ ( negedge reset or posedge CLK_I )
begin
if ( ! reset )
begin
BUF1 <= 0;
i <= 0;
end
else
begin
if ( inEn )
begin
case (i)
2'b00:
begin
BUF1 <= datain;
BUF1_RDY <= 1;
i <= i + 1 ;
end
2'b01:
begin
BUF1 <= datain;
BUF1_RDY <= 1;
i <= i + 1 ;
end
2'b10:
begin
BUF1 <= datain;
BUF1_RDY <= 1;
i <= i + 1 ;
end
2'b11:
begin
BUF1 <= datain;
BUF1_RDY <= 1;
i <= 2'b00 ;
end
default:
begin
BUF1 <= 0;
BUF1_RDY <= 0;
i <= 0;
end
endcase
end
else
begin
BUF1_RDY <= 0;
BUF1 <= 0;
i <= 0;
end
end
end */
always @ ( negedge reset or posedge CLK_I )
begin
if ( ! reset )
begin
BUF2<=0;
j <= 3'b000;
BUF2_RDY<=0;
end
else if ( inEn )
begin
case (j)
3'b000,3'b001,3'b010:
begin
BUF2 <= datain;
BUF2_RDY <= 1;
j <= j + 1 ;
end
3'b011:
begin
BUF2<= 1'b0;
BUF2<= 1'b0;
BUF2<= datain ;
BUF2_RDY <= 1;
j <= 3'b000 ;
end
default:
begin
BUF2 <= 0;
BUF2_RDY <= 0;
j <= 3'b000;
end
endcase
end
else
begin
BUF2 <= 0;
BUF2_RDY <= 0;
j <= 3'b000;
end
end
always @ ( negedge reset or posedge CLK_O )
begin
if ( ! reset )
begin
dataout<=0;
fill_rdy<=0;
i <= 3'b000;
end
else if ( BUF2_RDY )
begin
case (i)
3'b000,3'b001,3'b010,3'b011,3'b100:
begin
dataout <= BUF2;
fill_rdy<= 1;
i <= i + 1 ;
end
3'b101:
begin
dataout<=BUF2;
fill_rdy<=1;
i <= 3'b000 ;
end
default:
begin
dataout <= 0;
fill_rdy <= 0;
i <= 3'b000;
end
endcase
end
else
begin
dataout <= 0;
fill_rdy <= 0;
end
end
endmodule
下面是截图,第三幅图红笔圈的地方不对。
http://cache.amobbs.com/bbs_upload782111/files_34/ourdev_588104LPLBYT.png
功能仿真图 (原文件名:QQ截图未命名1.png)
http://cache.amobbs.com/bbs_upload782111/files_34/ourdev_588105FJ3OFG.png
时序仿真图 (原文件名:QQ截图未命名2.png)
http://cache.amobbs.com/bbs_upload782111/files_34/ourdev_588106EUDIBQ.PNG
红笔圈出的地方不对 (原文件名:QQ截图未命名22.PNG) 回复【楼主位】dolifez
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求助~
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