xinb
/
ic_com
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Add err pin & change port name

This commit is contained in:
xinb 2025-08-04 01:44:08 +08:00
parent 8c11ad75bf
commit f348990a79
Signed by: xinb
GPG Key ID: BBE1E9FAB8AEC360
2 changed files with 30 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
lib/fifo/sync/fifo_sync.sv
View File

@ -14,7 +14,8 @@ module fifo_sync #(
output wire [DATA_WIDTH-1:0] dout, output wire [DATA_WIDTH-1:0] dout,
output wire empty, output wire empty,
output wire full, output wire full,
output wire [$clog2(DEPTH):0] data_count output wire [$clog2(DEPTH):0] fill_level,
output reg err
); );
localparam ADDR_WIDTH = $clog2(DEPTH); localparam ADDR_WIDTH = $clog2(DEPTH);
@ -37,15 +38,23 @@ module fifo_sync #(
always @(posedge clk or negedge rst_n) begin always @(posedge clk or negedge rst_n) begin
if (!rst_n) begin if (!rst_n) begin
rd_ptr <= 0; rd_ptr <= 0;
end else if (rd_en && !empty) begin err <= 1'b0;
end else begin
if (rd_en && empty) begin
err <= 1'b1;
end else begin
err <= 1'b0;
end
if (rd_en && !empty) begin
rd_ptr <= rd_ptr + 1'b1; rd_ptr <= rd_ptr + 1'b1;
end end
end end
end
// 数据计数 // 数据计数
assign data_count = wr_ptr - rd_ptr; assign fill_level = wr_ptr - rd_ptr;
assign empty = (wr_ptr == rd_ptr); assign empty = (wr_ptr == rd_ptr);
assign full = (data_count == DEPTH); assign full = (fill_level == DEPTH);
generate generate
if (USE_RAM) begin : USE_RAM_BLOCK if (USE_RAM) begin : USE_RAM_BLOCK

20
tb/fifo/sync/fifo_sync_tb.sv
View File

@ -15,7 +15,8 @@ module fifo_sync_tb;
wire [DATA_WIDTH-1:0] dout; wire [DATA_WIDTH-1:0] dout;
wire empty; wire empty;
wire full; wire full;
wire [$clog2(DEPTH):0] data_count; wire [$clog2(DEPTH):0] fill_level;
wire err;
// 实例化DUT // 实例化DUT
fifo_sync #( fifo_sync #(
@ -32,7 +33,8 @@ module fifo_sync_tb;
.dout(dout), .dout(dout),
.empty(empty), .empty(empty),
.full(full), .full(full),
.data_count(data_count) .fill_level(fill_level),
.err(err)
); );
// 时钟生成 // 时钟生成
@ -81,6 +83,14 @@ module fifo_sync_tb;
if (!empty) $display("[TB][ERROR] FIFO未空!"); if (!empty) $display("[TB][ERROR] FIFO未空!");
else $display("[TB][INFO] FIFO已空!"); else $display("[TB][INFO] FIFO已空!");
// 尝试在empty时读，触发err
@(negedge clk);
rd_en = 1;
@(negedge clk);
rd_en = 0;
if (err) $display("[TB][INFO] 读空FIFO触发err信号");
else $display("[TB][ERROR] 读空FIFO未触发err!");
// 交错写读 // 交错写读
for (int i = 0; i < 8; i++) begin for (int i = 0; i < 8; i++) begin
@(negedge clk); @(negedge clk);
@ -100,9 +110,11 @@ module fifo_sync_tb;
// 监控输出 // 监控输出
always @(posedge clk) begin always @(posedge clk) begin
if (wr_en && !full) if (wr_en && !full)
$display("[TB][WRITE] @%0t: din=%0d, wr_ptr=%0d", $time, din, dut.wr_ptr); $display("[TB][WRITE] @%0t: din=%0d, wr_ptr=%0d, fill_level=%0d", $time, din, dut.wr_ptr, fill_level);
if (rd_en && !empty) if (rd_en && !empty)
$display("[TB][READ ] @%0t: dout=%0d, rd_ptr=%0d", $time, dout, dut.rd_ptr); $display("[TB][READ ] @%0t: dout=%0d, rd_ptr=%0d, fill_level=%0d", $time, dout, dut.rd_ptr, fill_level);
if (err)
$display("[TB][ERR ] @%0t: 读空FIFO!", $time);
end end
endmodule endmodule