Error (10028): Can't resol…

原文地址：(10028): Can't resolve multiple constant drivers for net "out2" at shiyan.v(14)解决办法">Error (10028): Can't resolve multiple constant drivers for net "out2" at shiyan.v(14)解决办法作者：老实的娃娃module shiyan(c1,c2,out1,out2);
input c1,c2;
output out1,out2;

reg out1,out2;

always @(posedge c1)
begin

out1<=0;
out2<=0;
end

always@(posedge c2)
begin

out1<=0;
out2<=1;

end

endmodule

上面的代码在quartusII里面就会出现题目的错误提示，器原因就是在两个always语句里面都对out1,out2信号赋值了，而两个always是并行快，所以提示出现多重驱动的情况。。。

解决办法：

将两个always合并为一个

module shiyan(c1,c2,out1,out2);
input c1,c2;
output out1,out2;

reg out1,out2;

always @(posedge c1 or posedge c2)
if(c1==1)

begin
out1<=0;
out2<=0;
end

else
begin
out1<=0;
out2<=1;
end
endmodule


ok!

打完收工！！