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電子工程網
標題:
EPM240 奇怪現象求助
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作者:
frjwdcyd
時間:
2012-3-18 17:34
標題:
EPM240 奇怪現象求助
module test2
(
input [15:0] xinput,
output reg [15:0] xoutput
);
reg [15:0] routput ;
always @ (xinput)
begin
case (xinput)
16'b???????????????0 : routput <= 16'b1111111111110000;
16'b??????????????01 : routput <= 16'b1111111111100001;
16'b?????????????011 : routput <= 16'b1111111111000011;
16'b????????????0111 : routput <= 16'b1111111110000111;
16'b???????????01111 : routput <= 16'b1111111100001111;
16'b??????????011111 : routput <= 16'b1111111000011111;
16'b?????????0111111 : routput <= 16'b1111110000111111;
16'b????????01111111 : routput <= 16'b1111100001111111;
16'b???????011111111 : routput <= 16'b1111000011111111;
16'b??????0111111111 : routput <= 16'b1110000111111111;
16'b?????01111111111 : routput <= 16'b1100001111111111;
16'b????011111111111 : routput <= 16'b1000011111111111;
16'b???0111111111111 : routput <= 16'b0000111111111111;
16'b??01111111111111 : routput <= 16'b0001111111111111;
16'b?011111111111111 : routput <= 16'b0011111111111111;
16'b0111111111111111 : routput <= 16'b0111111111111111;
default : routput <= 16'b1111111111111111;
endcase
end
xoutput<=routput;
endmodule
運行結果 xoutput(8) xoutput(9)等應該穩定輸出3.3V，為什么輸出的是脈沖啊，而且不穩定。
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