Removed fan-outs from the following always-disabled I/O buffers？如何解决？

只看该作者 · 2012-12-30 10:56

如题，

Warning (13027): Removed fan-outs from the following always-disabled I/O buffers
Warning (13028): Removed fan-out from the always-disabled I/O buffer "dataout[0]" to the node "dataout[0]"
Warning (13028): Removed fan-out from the always-disabled I/O buffer "dataout[1]" to the node "dataout[1]"
Warning (13028): Removed fan-out from the always-disabled I/O buffer "dataout[2]" to the node "dataout[2]"
Warning (13028): Removed fan-out from the always-disabled I/O buffer "dataout[3]" to the node "dataout[3]"
Warning (13028): Removed fan-out from the always-disabled I/O buffer "dataout[4]" to the node "dataout[4]"
Warning (13028): Removed fan-out from the always-disabled I/O buffer "dataout[5]" to the node "dataout[5]"
Warning (13028): Removed fan-out from the always-disabled I/O buffer "dataout[6]" to the node "dataout[6]"
Warning (13028): Removed fan-out from the always-disabled I/O buffer "dataout[7]" to the node "dataout[7]"

求高手解决

只看该作者 · 2012-12-30 11:01

代码如下
module ram( dataout, addr, wr, rd, cs, datain );
output[7:0] dataout;
input[4:0] addr;
input[7:0] datain;
input cs, wr, rd;

reg[7:0] datastore[31:0];
reg[7:0] dataout;

//write data
always @ ( wr, cs, addr, datastore, datain )
begin
if( cs == 0 )
begin
if( wr )
begin
datastore[addr] = datain;
end
else
begin
dataout = 8'bz;
end
end
end

//read data
always @ ( rd, cs, addr, datastore )
begin
if( cs == 0 )
begin
if( rd )
begin
dataout = datastore[addr];
end
else
begin
dataout = 8'bz;
end
end
end

endmodule