我有一个 SREC 文件，它是一个简单的文本文件，我想在 verilog 中逐行读取它。我怎样才能做到这一点？
以下内容读取文件，每个时钟周期读取 1 行：预期数据格式为每行一个十进制数。
integer data_file ; // file handler
integer scan_file ; // file handler
logic signed [21:0] captured_data;
`define NULL 0
initial begin
data_file = $fopen("data_file.dat", "r");
if (data_file == `NULL) begin
$display("data_file handle was NULL");
$finish;
end
end
always @(posedge clk) begin
scan_file = $fscanf(data_file, "%d\n", captured_data);
if (!$feof(data_file)) begin
//use captured_data as you would any other wire or reg value;
end
end
谢谢您的解决方案。 我对其进行了一些修改，以使用每行包含 32 个十六进制数字的 2 个 .txt 文件，并发现了一些困难，因为我不明白每行代码的作用。我的发现如下。
仅 vars 和 reg 声明
////////I'm using inputs.txt and outputs.txt to read both lines at the same time
module Decryption_Top_Testbench;
////////TEXT DOC variables
integer file_outputs ; // var to see if file exists
integer scan_outputs ; // captured text handler
integer file_inputs ; // var to see if file exists
integer scan_inputs ; // captured text handler
//TXT
reg [127:0] captured_outputs; ///Actual text obtained from outputs.txt lines
reg [127:0] captured_inputs; ///Actual text obtained from inputs.txt lines
打开两个文件
initial
begin
// TEXT FILE outputs///////////////////////
file_outputs = $fopen("C:/outputs.txt", "r"); //Opening text file
//you should use the full path if you don't want to get in the trouble
//of using environment vars
if (file_outputs == 0) begin // If outputs file is not found
$display("data_file handle was NULL"); //simulation monitor command
$finish;
end
// TEXT FILE inputs///////////////////////
file_inputs = $fopen("C:/inputs.txt", "r"); //Opening text file (inputs)
if (file_inputs == 0) begin //If inputs file is not found
$display("data_file handle was NULL");
$finish;
end
end
在这部分，我将以十六进制格式逐行读取并将其存储在“captured_outputs”寄存器和“captured_inputs”寄存器中。
///Since I'm using it just to simulate I'm not interested on a clock pulse,
/// I want it to happen all at the same time with whatever comes first
always @(* )
begin
if (!$feof(file_outputs))
begin
///!$feof means if not reaching the end of file
///file_outputs is always returning a different number other than "0" if the doc
///has not ended. When reaching "0" it means the doc is over.
///Since both of my docs are the same length I'm only validating one of them
///but if you have different lenghts you should verify each doc you're reading
///
scan_inputs = $fscanf(file_inputs, "%h\n", captured_inputs); //Inputs Line text
scan_outputs = $fscanf(file_outputs, "%h\n", captured_outputs); //Outputs line text
$display ("Line :[inputs: %h _ outputs: %h ]" captured_inputs, captured_outputs);
// Displaying each line at the simulation monitor
///$fscanf means formatted text, $scanf would read text ignoring the format
/// %h\n means it should expect HEX numbers and the end of line character, that means
/// the line is over, but if you want to use a diff criteria
/// you can replace \n to whatever you may need
end
else
begin
$finish;
$fclose(file_outputs); //Closing files just in case to prevent wasting memory
$fclose(file_inputs);
end
end
我只是想贡献一些东西，让任何开始用 Verilog 编码的人都能理解并将这个伟大的功能附加到他/她的项目中。
享受吧！
integer data_file ; // file handler
integer scan_file ; // file handler
logic signed [21:0] captured_data;
`define NULL 0
initial begin
data_file = $fopen("data_file.dat", "r");
if (data_file == `NULL) begin
$display("data_file handle was NULL");
$finish;
end
end
always @(posedge clk) begin
scan_file = $fscanf(data_file, "%d\n", captured_data);
if (!$feof(data_file)) begin
//use captured_data as you would any other wire or reg value;
end
end
一旦我们在always块之后定义了scanf函数，那么我们需要在eof（文件结尾）的if块中放入什么，您能解释一下吗
就像我正在做 18 位 2 输入乘法，并且我有 10 个不同的 a 和 b（输入）输入，那么我应该如何使用