求助 大家看一下 这是什么错误？
编了一个 ram的读写下面是testbench的程序：
module RAM_test (out,clk,address,wren,data);
input out;
output clk;
output address;
output wren;
output data;
reg clk;
reg address;
reg wren;
reg data;
initial
begin
forever #10 clk=~clk;
end
initial
begin
data_in(5'd0,8'd0);
data_in(5'd1,8'd1);
data_in(5'd2,8'd2);
data_in(5'd3,8'd3);
data_in(5'd4,8'd4);
#1000
wren=1'b0;
address=5'd0;
#100
address=5'd1;
#100
address=5'd2;
#100
address=5'd3;
#100
address=5'd4;
#1000
$stop;
end
task data_in;
input address_in;
input data_in;
@(posedge clk)
fork
address =address_in;
data=data_in;
wren=1'b1;
join
@(posedge clk)
fork
address =5'bzzzz_z;
data=8'bzzzz_zzzz;
wren=1'bz;
join
endtask
endmodule
但modelsim编译时 报错如下：
http://cache.amobbs.com/bbs_upload782111/files_34/ourdev_593464G8WGBY.jpg
(原文件名:QQ截图未命名.jpg)
请问这是什么错误？怎么解决？谢谢！ 补充
程序为调用ip核中的单口ram
忘了例化了 例化程序如下 ：
RAM ram(.out(out),.clk(clk),.address(address),.wren(wren),.data(data));
加了之后还是同样的错误 是不是task--endtask中间没有写begin---end ；
看你的task中间由好几个语言块啊，没begin---end包含进来会出问题的哦
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