常用功能语句归纳

归纳一些常用的功能语句，方便在仿真中使用。

1. 文件的读取写入

task tc_temp;
begin
　reg [15:0] data_0;
　reg [15:0] data_1;
　reg [15:0] data_2;
　integer js;

　integer file_wr_0;
　integer file_wr_1;
　integer file_wr_2;

　file_wr_0 = $fopen("./data_out_0.txt","w");
　file_wr_1 = $fopen("./data_out_1.txt","w");
　file_wr_2 = $fopen("./data_out_2.txt","w");

　for(js = 0; js < 1024; js++) begin

　　data_0 = $random%65535;
　　data_1 = $random%65535;
　　data_2 = $random%65535;

　　$fwrite(file_wr_0,"%h\n", data_0);
　　$fwrite(file_wr_1,"%h\n", data_1);
　　$fwrite(file_wr_2,"%h\n", data_2);
　　#10ns;
　end

　$fclose(file_wr_0);

　$fclose(file_wr_1);
　$fclose(file_wr_2);
end
endtask