利用单口RAM 生成FIFO的Verilog代码
时间: 2024-04-13 17:28:20 浏览: 110
FIFO_recalltrm_fifo_verilog_;FIFO_
下面是使用单口RAM实现的FIFO的Verilog代码示例:
```verilog
module FIFO (
input wire clk,
input wire reset,
input wire write_en,
input wire read_en,
input wire [7:0] write_data,
output wire [7:0] read_data,
output wire empty,
output wire full
);
parameter DATA_WIDTH = 8;
parameter DEPTH = 16;
reg [DATA_WIDTH-1:0] mem [DEPTH-1:0];
reg [4:0] write_ptr;
reg [4:0] read_ptr;
reg [4:0] count;
wire wr_ptr_inc = (write_en && !full) ? write_ptr + 1 : write_ptr;
wire rd_ptr_inc = (read_en && !empty) ? read_ptr + 1 : read_ptr;
assign read_data = mem[read_ptr];
assign empty = (count == 0);
assign full = (count == DEPTH);
always @(posedge clk or posedge reset) begin
if (reset) begin
write_ptr <= 0;
read_ptr <= 0;
count <= 0;
end else begin
if (write_en && !full)
write_ptr <= wr_ptr_inc;
if (read_en && !empty)
read_ptr <= rd_ptr_inc;
if (write_en && read_en && !full && !empty)
count <= count;
else if (write_en && !read_en && !full)
count <= count + 1;
else if (!write_en && read_en && !empty)
count <= count - 1;
end
end
always @(posedge clk) begin
if (write_en && !full)
mem[write_ptr] <= write_data;
end
endmodule
```
上述代码实现了一个带有读写使能、读写数据和读写指针的FIFO。其中,`DATA_WIDTH`表示数据宽度,`DEPTH`表示FIFO的深度。使用单口RAM作为存储器来实现FIFO的功能。FIFO的读写指针通过计数器实现增减,并且根据读写使能和FIFO的状态进行更新。输出信号包括读取的数据、空标志和满标志。
请注意,这只是一个简单的FIFO实现示例,您可以根据需要进行修改和扩展。
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