【发布时间】:2021-08-24 04:01:37
【问题描述】:
我试图在 Xilinx Vivado 中运行一些简单的行为仿真,但随后出现错误 -
[Common 17-1293] The path 'D:/Deepan/Text Books/internship/test/test.cache/wt' already exists, is a directory, but is not writable.
以前我想运行的 Verilog 文件可以正常运行,但突然就坏了。
我确保该目录具有正确的访问权限并且没有卡在只读状态,但我仍然不断收到错误。
对于 v2021.1 和 v2020.3,我一直收到相同的错误。
我想运行的文件 -
`timescale 1ns / 1ps
module Mealy_Sequence(
input wire clk,
input wire reset,
input wire level,
output reg tick
);
localparam //The Mealy states
zero = 1'b0,
one = 1'b1;
reg current_state, next_state;
always @(posedge clk, posedge reset)
begin
if(reset)
current_state <= zero;
else
current_state <= next_state;
end
always @(current_state, level)
begin
case(current_state)
zero: begin
if(level)
begin
next_state <= one;
tick <= 1;
end
else
begin
next_state <= current_state;
tick <= 0;
end
end
one: begin
if(level)
begin
next_state <= one;
tick <= 0;
end
else
begin
next_state <= zero;
tick <= 0;
end
end
endcase
end
endmodule
测试台-
`timescale 1ns / 1ps
module Sequence_Test_Mealy;
reg clk;
reg reset;
reg level;
wire tick;
Mealy_Sequence x(
.clk(clk),
.reset(reset),
.level(level),
.tick(tick)
);
always #5 clk = ~clk;
always #15 level = ~level;
initial
begin
clk <= 0;
level <= 0;
reset <= 1;
#10 reset <=0;
end
endmodule
【问题讨论】:
-
看起来缓存文件引起了问题。如果可能,请尝试在另一个目录中创建一个新项目或删除缓存文件。顺便说一句,您使用非阻塞赋值来模拟组合逻辑,这是不可取的。也请不要在初始块中使用非阻塞赋值。
-
@PradyumanBissa 我曾尝试重新创建该项目,但没有帮助。另外,感谢有关非阻塞分配的提示。我会记住的。