tests/test.sh exit code (0 → resolved); the classification below is post-hoc and cannot change it.pwd && rg --files -n /app | head -100 && sed -n '1,240p' /app/dut.sv
Chunk ID: e197b0 Wall time: 0.0000 seconds Process exited with code 2 Original token count: 15 Output: /app sed: can't read /app/dut.sv: No such file or directory
ls -la /app
Chunk ID: 27bed1 Wall time: 0.0000 seconds Process exited with code 0 Original token count: 24 Output: total 8 drwxr-xr-x 2 root root 4096 Jun 19 22:02 . drwxr-xr-x 1 root root 4096 Jun 20 16:53 ..
find /app -maxdepth 2 -type f | sort | sed -n '1,120p'
Chunk ID: 296445 Wall time: 0.0000 seconds Process exited with code 0 Original token count: 0 Output:
*** Begin Patch *** Add File: /app/dut.sv +module TopModule ( + input clk, + input rst, + input cmd_valid, + input bit_in, + input scl_i, + input sda_i, + input [1:0] cmd, + output cmd_ack, + output busy, + output al, + output bit_out, + output scl_drive_low, + output sda_drive_low +); + + I2cBitCommandEngine engine ( + .clk(clk), + .rst(rst), + .cmd_valid(cmd_valid), + .bit_in(bit_in), + .scl_i(scl_i), + .sda_i(sda_i), + .cmd(cmd), + .cmd_ack(cmd_ack), + .busy(busy), + .al(al), + .bit_out(bit_out), + .scl_drive_low(scl_drive_low), + .sda_drive_low(sda_drive_low) + ); + +endmodule + +module I2cBitCommandEngine ( + input clk, + input rst, + input cmd_valid, + input bit_in, + input scl_i, + input sda_i, + input [1:0] cmd, + output reg cmd_ack, + output reg busy, + output reg al, + output reg bit_out, + output reg scl_drive_low, + output reg sda_drive_low +); + + localparam [1:0] CMD_START = 2'd0; + localparam [1:0] CMD_STOP = 2'd1; + localparam [1:0] CMD_WRITE = 2'd2; + localparam [1:0] CMD_READ = 2'd3; + + localparam [3:0] ST_READY = 4'd0; + localparam [3:0] ST_START_WAIT_SCL = 4'd1; + localparam [3:0] ST_START_SDA_LOW = 4'd2; + localparam [3:0] ST_START_FINISH = 4'd3; + localparam [3:0] ST_STOP_SETUP = 4'd4; + localparam [3:0] ST_STOP_RELEASE_SCL = 4'd5; + localparam [3:0] ST_STOP_WAIT_SCL = 4'd6; + localparam [3:0] ST_STOP_FINISH = 4'd7; + localparam [3:0] ST_WRITE_SETUP = 4'd8; + localparam [3:0] ST_WRITE_RELEASE_SCL = 4'd9; + localparam [3:0] ST_WRITE_WAIT_SCL = 4'd10; + localparam [3:0] ST_WRITE_FINISH = 4'd11; + localparam [3:0] ST_READ_SETUP = 4'd12; + localparam [3:0] ST_READ_RELEASE_SCL = 4'd13; + localparam [3:0] ST_READ_WAIT_SCL = 4'd14; + localparam [3:0] ST_READ_FINISH = 4'd15; + + reg [3:0] state; + reg write_bit; + + always @(posedge clk) begin + if (rst) begin + state <= ST_READY; + write_bit <= 1'b0; + cmd_ack <= 1'b0; + busy <= 1'b0; + al <= 1'b0; + bit_out <= 1'b0; + scl_drive_low <= 1'b0; + sda_drive_low <= 1'b0; + end else begin + cmd_ack <= 1'b0; + + case (state) + ST_READY: begin + if (cmd_valid) begin + case (cmd) + CMD_START: begin + busy <= 1'b1; + scl_drive_low <= 1'b0; + sda_drive_low <= 1'b0; + state <= ST_START_WAIT_SCL; + end + + CMD_STOP: begin + if (busy) begin + scl_drive_low <= 1'b1; + sda_drive_low <= 1'b1; + state <= ST_STOP_SETUP; + end + end + + CMD_WRITE: begin + if (busy) begin + write_bit <= bit_in; + scl_drive_low <= 1'b1; + sda_drive_low <= ~bit_in; + state <= ST_WRITE_SETUP; + end + end + + CMD_READ: begin + if (busy) begin + scl_drive_low <= 1'b1; + sda_drive_low <= 1'b0; + state <= ST_READ_SETUP; + end + end + endcase + end + end + + ST_START_WAIT_SCL: begin + scl_drive_low <= 1'b0; + sda_drive_low <= 1'b0; + if (scl_i) begin + if (!sda_i) begin + al <= 1'b1; + end + state <= ST_START_SDA_LOW; + end + end + + ST_START_SDA_LOW: begin + scl_drive_low <= 1'b0; + sda_drive_low <= 1'b1; + state <= ST_START_FINISH; + end + + ST_START_FINISH: begin + scl_drive_low <= 1'b1; + sda_drive_low <= 1'b1; + cmd_ack <= 1'b1; + state <= ST_READY; + end + + ST_STOP_SETUP: begin + scl_drive_low <= 1'b1; + sda_drive_low <= 1'b1; + state <= ST_STOP_RELEASE_SCL; + end + + ST_STOP_RELEASE_SCL: begin + scl_drive_low <= 1'b0; + sda_drive_low <= 1'b1; + state <= ST_STOP_WAIT_SCL; + end + + ST_STOP_WAIT_SCL: begin + scl_drive_low <= 1'b0; + sda_drive_low <= 1'b1; + if (scl_i) begin + state <= ST_STOP_FINISH; + end + end + + ST_STOP_FINISH: begin + scl_drive_low <= 1'b0; + sda_drive_low <= 1'b0; + busy <= 1'b0; + cmd_ack <= 1'b1; + state <= ST_READY; + end + + ST_WRITE_SETUP: begin + scl_drive_low <= 1'b1; + sda_drive_low <= ~write_bit; + state <= ST_WRITE_RELEASE_SCL; + end + + ST_WRITE_RELEASE_SCL: begin + scl_drive_low <= 1'b0; + sda_drive_low <= ~write_bit; + state <= ST_WRITE_WAIT_SCL; + end + + ST_WRITE_WAIT_SCL: begin + scl_drive_low <= 1'b0; + sda_drive_low <= ~write_bit; + if (scl_i) begin + if (write_bit && !sda_i) begin + al <= 1'b1; + end + state <= ST_WRITE_FINISH; + end + end + + ST_WRITE_FINISH: begin + scl_drive_low <= 1'b1; + sda_drive_low <= ~write_bit; + cmd_ack <= 1'b1; + state <= ST_READY; + end + + ST_READ_SETUP: begin + scl_drive_low <= 1'b1; + sda_drive_low <= 1'b0; + state <= ST_READ_RELEASE_SCL; + end + + ST_READ_RELEASE_SCL: begin + scl_drive_low <= 1'b0; + sda_drive_low <= 1'b0; + state <= ST_READ_WAIT_SCL; + end + + ST_READ_WAIT_SCL: begin + scl_drive_low <= 1'b0; + sda_drive_low <= 1'b0; + if (scl_i) begin + bit_out <= sda_i; + state <= ST_READ_FINISH; + end + end + + ST_READ_FINISH: begin + scl_drive_low <= 1'b1; + sda_drive_low <= 1'b0; + cmd_ack <= 1'b1; + state <= ST_READY; + end + + default: begin + state <= ST_READY; + end + endcase + end + end + +endmodule *** End Patch Exit code: 0 Wall time: 0 seconds Output: Success. Updated the following files: A /app/dut.sv
command -v iverilog || true command -v verilator || true
Chunk ID: 328fa3 Wall time: 0.0000 seconds Process exited with code 0 Original token count: 5 Output: /usr/bin/iverilog
iverilog -g2012 -Wall -tnull /app/dut.sv
Chunk ID: fec5b3 Wall time: 0.0000 seconds Process exited with code 0 Original token count: 0 Output:
*** Begin Patch
*** Add File: /tmp/tb_dut.sv
+`timescale 1ns/1ps
+
+module tb;
+ reg clk;
+ reg rst;
+ reg cmd_valid;
+ reg bit_in;
+ reg scl_i;
+ reg sda_i;
+ reg [1:0] cmd;
+ wire cmd_ack;
+ wire busy;
+ wire al;
+ wire bit_out;
+ wire scl_drive_low;
+ wire sda_drive_low;
+
+ TopModule dut (
+ .clk(clk),
+ .rst(rst),
+ .cmd_valid(cmd_valid),
+ .bit_in(bit_in),
+ .scl_i(scl_i),
+ .sda_i(sda_i),
+ .cmd(cmd),
+ .cmd_ack(cmd_ack),
+ .busy(busy),
+ .al(al),
+ .bit_out(bit_out),
+ .scl_drive_low(scl_drive_low),
+ .sda_drive_low(sda_drive_low)
+ );
+
+ initial clk = 1'b0;
+ always #5 clk = ~clk;
+
+ task tick;
+ begin
+ @(negedge clk);
+ @(posedge clk);
+ #1;
+ end
+ endtask
+
+ task expect;
+ input value;
+ input expected;
+ input [160*8-1:0] name;
+ begin
+ if (value !== expected) begin
+ $display("FAIL %0s got %0b expected %0b", name, value, expected);
+ $finish;
+ end
+ end
+ endtask
+
+ initial begin
+ rst = 1'b1;
+ cmd_valid = 1'b0;
+ bit_in = 1'b0;
+ scl_i = 1'b1;
+ sda_i = 1'b1;
+ cmd = 2'd0;
+
+ tick();
+ rst = 1'b0;
+ tick();
+
+ cmd = 2'd0;
+ cmd_valid = 1'b1;
+ tick();
+ cmd_valid = 1'b0;
+ expect(busy, 1'b1, "start accept sets busy");
+ expect(scl_drive_low, 1'b0, "start accept releases scl");
+ expect(sda_drive_low, 1'b0, "start accept releases sda");
+ expect(cmd_ack, 1'b0, "start accept no ack");
+
+ tick();
+ expect(scl_drive_low, 1'b0, "start wait observes high only");
+ expect(sda_drive_low, 1'b0, "start wait holds sda release");
+ expect(cmd_ack, 1'b0, "start wait no ack");
+
+ tick();
+ expect(scl_drive_low, 1'b0, "start sda low holds scl release");
+ expect(sda_drive_low, 1'b1, "start sda low");
+ expect(cmd_ack, 1'b0, "start sda low no ack");
+
+ tick();
+ expect(scl_drive_low, 1'b1, "start finish pulls scl low");
+ expect(sda_drive_low, 1'b1, "start finish keeps sda low");
+ expect(cmd_ack, 1'b1, "start ack");
+
+ cmd = 2'd2;
+ bit_in = 1'b1;
+ cmd_valid = 1'b1;
+ tick();
+ cmd_valid = 1'b0;
+ expect(cmd_ack, 1'b0, "write accept clears ack");
+ expect(scl_drive_low, 1'b1, "write accept scl low");
+ expect(sda_drive_low, 1'b0, "write one releases sda");
+
+ tick();
+ expect(scl_drive_low, 1'b1, "write setup scl low");
+ expect(sda_drive_low, 1'b0, "write setup sda release");
+
+ tick();
+ expect(scl_drive_low, 1'b0, "write releases scl");
+ expect(sda_drive_low, 1'b0, "write high phase sda release");
+ expect(cmd_ack, 1'b0, "write release no ack");
+
+ sda_i = 1'b0;
+ tick();
+ expect(al, 1'b1, "write one arbitration lost");
+ expect(cmd_ack, 1'b0, "write high observe no ack");
+
+ tick();
+ expect(cmd_ack, 1'b1, "write ack after high observe");
+ expect(scl_drive_low, 1'b1, "write finish pulls scl low");
+
+ sda_i = 1'b1;
+ cmd = 2'd3;
+ cmd_valid = 1'b1;
+ tick();
+ cmd_valid = 1'b0;
+ expect(scl_drive_low, 1'b1, "read accept scl low");
+ expect(sda_drive_low, 1'b0, "read accept sda release");
+
+ tick();
+ tick();
+ sda_i = 1'b1;
+ tick();
+ expect(bit_out, 1'b1, "read samples high");
+ expect(cmd_ack, 1'b0, "read sample no ack");
+
+ tick();
+ expect(cmd_ack, 1'b1, "read ack after sample");
+ expect(scl_drive_low, 1'b1, "read finish pulls scl low");
+
+ cmd = 2'd1;
+ cmd_valid = 1'b1;
+ tick();
+ cmd_valid = 1'b0;
+ expect(scl_drive_low, 1'b1, "stop accept scl low");
+ expect(sda_drive_low, 1'b1, "stop accept sda low");
+ expect(busy, 1'b1, "stop accept still busy");
+
+ tick();
+ expect(scl_drive_low, 1'b1, "stop setup scl low");
+ expect(sda_drive_low, 1'b1, "stop setup sda low");
+
+ tick();
+ expect(scl_drive_low, 1'b0, "stop releases scl");
+ expect(sda_drive_low, 1'b1, "stop keeps sda low");
+
+ tick();
+ expect(cmd_ack, 1'b0, "stop high observe no ack");
+ expect(busy, 1'b1, "stop high observe still busy");
+
+ tick();
+ expect(cmd_ack, 1'b1, "stop ack");
+ expect(busy, 1'b0, "stop clears busy");
+ expect(scl_drive_low, 1'b0, "stop releases scl final");
+ expect(sda_drive_low, 1'b0, "stop releases sda final");
+
+ $display("PASS");
+ $finish;
+ end
+endmodule
*** End Patch
Exit code: 0
Wall time: 0 seconds
Output:
Success. Updated the following files:
A /tmp/tb_dut.sv
iverilog -g2012 -Wall -o /tmp/tb_dut.vvp /app/dut.sv /tmp/tb_dut.sv && vvp /tmp/tb_dut.vvp
Chunk ID: 07e113 Wall time: 0.0000 seconds Process exited with code 126 Original token count: 1324 Output: /tmp/tb_dut.sv:45: syntax error /tmp/tb_dut.sv:45: error: Invalid module item. /tmp/tb_dut.sv:49: syntax error /tmp/tb_dut.sv:51: error: Invalid module item. /tmp/tb_dut.sv:53: syntax error /tmp/tb_dut.sv:58: error: Invalid module item. /tmp/tb_dut.sv:59: syntax error /tmp/tb_dut.sv:59: error: Invalid module instantiation /tmp/tb_dut.sv:60: error: Invalid module instantiation /tmp/tb_dut.sv:61: error: Invalid module instantiation /tmp/tb_dut.sv:62: error: Invalid module instantiation /tmp/tb_dut.sv:63: error: Invalid module instantiation /tmp/tb_dut.sv:66: syntax error /tmp/tb_dut.sv:66: error: Invalid module instantiation /tmp/tb_dut.sv:69: syntax error /tmp/tb_dut.sv:69: error: Invalid module instantiation /tmp/tb_dut.sv:70: error: Invalid module instantiation /tmp/tb_dut.sv:72: syntax error /tmp/tb_dut.sv:72: error: Invalid module instantiation /tmp/tb_dut.sv:73: error: Invalid module item. /tmp/tb_dut.sv:74: syntax error /tmp/tb_dut.sv:74: error: Invalid module item. /tmp/tb_dut.sv:75: syntax error /tmp/tb_dut.sv:75: error: Invalid module item. /tmp/tb_dut.sv:76: syntax error /tmp/tb_dut.sv:76: error: Invalid module item. /tmp/tb_dut.sv:79: syntax error /tmp/tb_dut.sv:79: error: Invalid module item. /tmp/tb_dut.sv:80: syntax error /tmp/tb_dut.sv:80: error: Invalid module item. /tmp/tb_dut.sv:81: syntax error /tmp/tb_dut.sv:81: error: Invalid module item. /tmp/tb_dut.sv:84: syntax error /tmp/tb_dut.sv:84: error: Invalid module item. /tmp/tb_dut.sv:85: syntax error /tmp/tb_dut.sv:85: error: Invalid module item. /tmp/tb_dut.sv:86: syntax error /tmp/tb_dut.sv:86: error: Invalid module item. /tmp/tb_dut.sv:89: syntax error /tmp/tb_dut.sv:89: error: Invalid module item. /tmp/tb_dut.sv:90: syntax error /tmp/tb_dut.sv:90: error: Invalid module item. /tmp/tb_dut.sv:91: syntax error /tmp/tb_dut.sv:91: error: Invalid module item. /tmp/tb_dut.sv:93: syntax error /tmp/tb_dut.sv:93: error: Invalid module instantiation /tmp/tb_dut.sv:94: error: Invalid module instantiation /tmp/tb_dut.sv:95: error: Invalid module instantiation /tmp/tb_dut.sv:97: syntax error /tmp/tb_dut.sv:97: error: Invalid module instantiation /tmp/tb_dut.sv:98: error: Invalid module item. /tmp/tb_dut.sv:99: syntax error /tmp/tb_dut.sv:99: error: Invalid module item. /tmp/tb_dut.sv:100: syntax error /tmp/tb_dut.sv:100: error: Invalid module item. /tmp/tb_dut.sv:103: syntax error /tmp/tb_dut.sv:103: error: Invalid module item. /tmp/tb_dut.sv:104: syntax error /tmp/tb_dut.sv:104: error: Invalid module item. /tmp/tb_dut.sv:107: syntax error /tmp/tb_dut.sv:107: error: Invalid module item. /tmp/tb_dut.sv:108: syntax error /tmp/tb_dut.sv:108: error: Invalid module item. /tmp/tb_dut.sv:109: syntax error /tmp/tb_dut.sv:109: error: Invalid module item. /tmp/tb_dut.sv:111: syntax error /tmp/tb_dut.sv:111: error: Invalid module instantiation /tmp/tb_dut.sv:113: syntax error /tmp/tb_dut.sv:113: error: Invalid module item. /tmp/tb_dut.sv:114: syntax error /tmp/tb_dut.sv:114: error: Invalid module item. /tmp/tb_dut.sv:117: syntax error /tmp/tb_dut.sv:117: error: Invalid module item. /tmp/tb_dut.sv:118: syntax error /tmp/tb_dut.sv:118: error: Invalid module item. /tmp/tb_dut.sv:120: syntax error /tmp/tb_dut.sv:120: error: Invalid module instantiation /tmp/tb_dut.sv:121: error: Invalid module instantiation /tmp/tb_dut.sv:122: error: Invalid module instantiation /tmp/tb_dut.sv:124: syntax error /tmp/tb_dut.sv:124: error: Invalid module instantiation /tmp/tb_dut.sv:125: error: Invalid module item. /tmp/tb_dut.sv:126: syntax error /tmp/tb_dut.sv:126: error: Invalid module item. /tmp/tb_dut.sv:130: syntax error /tmp/tb_dut.sv:130: error: Invalid module instantiation /tmp/tb_dut.sv:132: syntax error /tmp/tb_dut.sv:132: error: Invalid module item. /tmp/tb_dut.sv:133: syntax error /tmp/tb_dut.sv:133: error: Invalid module item. /tmp/tb_dut.sv:136: syntax error /tmp/tb_dut.sv:136: error: Invalid module item. /tmp/tb_dut.sv:137: syntax error /tmp/tb_dut.sv:137: error: Invalid module item. /tmp/tb_dut.sv:139: syntax error /tmp/tb_dut.sv:139: error: Invalid module instantiation /tmp/tb_dut.sv:140: error: Invalid module instantiation /tmp/tb_dut.sv:142: syntax error /tmp/tb_dut.sv:142: error: Invalid module instantiation /tmp/tb_dut.sv:143: error: Invalid module item. /tmp/tb_dut.sv:144: syntax error /tmp/tb_dut.sv:144: error: Invalid module item. /tmp/tb_dut.sv:145: syntax error /tmp/tb_dut.sv:145: error: Invalid module item. /tmp/tb_dut.sv:148: syntax error /tmp/tb_dut.sv:148: error: Invalid module item. /tmp/tb_dut.sv:149: syntax error /tmp/tb_dut.sv:149: error: Invalid module item. /tmp/tb_dut.sv:152: syntax error /tmp/tb_dut.sv:152: error: Invalid module item. /tmp/tb_dut.sv:153: syntax error /tmp/tb_dut.sv:153: error: Invalid module item. /tmp/tb_dut.sv:156: syntax error /tmp/tb_dut.sv:156: error: Invalid module item. /tmp/tb_dut.sv:157: syntax error /tmp/tb_dut.sv:157: error: Invalid module item. /tmp/tb_dut.sv:160: syntax error /tmp/tb_dut.sv:160: error: Invalid module item. /tmp/tb_dut.sv:161: syntax error /tmp/tb_dut.sv:161: error: Invalid module item. /tmp/tb_dut.sv:162: syntax error /tmp/tb_dut.sv:162: error: Invalid module item. /tmp/tb_dut.sv:163: syntax error /tmp/tb_dut.sv:163: error: Invalid module item. /tmp/tb_dut.sv:167: syntax error I give up.
nl -ba /tmp/tb_dut.sv | sed -n '35,60p'
Chunk ID: 85d64a
Wall time: 0.0000 seconds
Process exited with code 0
Original token count: 180
Output:
35 always #5 clk = ~clk;
36
37 task tick;
38 begin
39 @(negedge clk);
40 @(posedge clk);
41 #1;
42 end
43 endtask
44
45 task expect;
46 input value;
47 input expected;
48 input [160*8-1:0] name;
49 begin
50 if (value !== expected) begin
51 $display("FAIL %0s got %0b expected %0b", name, value, expected);
52 $finish;
53 end
54 end
55 endtask
56
57 initial begin
58 rst = 1'b1;
59 cmd_valid = 1'b0;
60 bit_in = 1'b0;
perl -0pi -e 's/task expect;/task check;/g; s/expect\(/check(/g' /tmp/tb_dut.sv
Chunk ID: ae0377 Wall time: 0.0000 seconds Process exited with code 0 Original token count: 0 Output:
iverilog -g2012 -Wall -o /tmp/tb_dut.vvp /app/dut.sv /tmp/tb_dut.sv && vvp /tmp/tb_dut.vvp
Chunk ID: 0c7ff6
Wall time: 0.0000 seconds
Process exited with code 0
Original token count: 89
Output:
warning: Some design elements have no explicit time unit and/or
: time precision. This may cause confusing timing results.
: Affected design elements are:
: -- module I2cBitCommandEngine declared here: /app/dut.sv:35
: -- module TopModule declared here: /app/dut.sv:1
PASS
/tmp/tb_dut.sv:166: $finish called at 216000 (1ps)
git diff -- /app/dut.sv
Chunk ID: f3d8fd Wall time: 0.0000 seconds Process exited with code 127 Original token count: 11 Output: /bin/bash: line 1: git: command not found
nl -ba /app/dut.sv | sed -n '1,260p'
Chunk ID: ba15ef
Wall time: 0.0000 seconds
Process exited with code 0
Original token count: 2342
Output:
1 module TopModule (
2 input clk,
3 input rst,
4 input cmd_valid,
5 input bit_in,
6 input scl_i,
7 input sda_i,
8 input [1:0] cmd,
9 output cmd_ack,
10 output busy,
11 output al,
12 output bit_out,
13 output scl_drive_low,
14 output sda_drive_low
15 );
16
17 I2cBitCommandEngine engine (
18 .clk(clk),
19 .rst(rst),
20 .cmd_valid(cmd_valid),
21 .bit_in(bit_in),
22 .scl_i(scl_i),
23 .sda_i(sda_i),
24 .cmd(cmd),
25 .cmd_ack(cmd_ack),
26 .busy(busy),
27 .al(al),
28 .bit_out(bit_out),
29 .scl_drive_low(scl_drive_low),
30 .sda_drive_low(sda_drive_low)
31 );
32
33 endmodule
34
35 module I2cBitCommandEngine (
36 input clk,
37 input rst,
38 input cmd_valid,
39 input bit_in,
40 input scl_i,
41 input sda_i,
42 input [1:0] cmd,
43 output reg cmd_ack,
44 output reg busy,
45 output reg al,
46 output reg bit_out,
47 output reg scl_drive_low,
48 output reg sda_drive_low
49 );
50
51 localparam [1:0] CMD_START = 2'd0;
52 localparam [1:0] CMD_STOP = 2'd1;
53 localparam [1:0] CMD_WRITE = 2'd2;
54 localparam [1:0] CMD_READ = 2'd3;
55
56 localparam [3:0] ST_READY = 4'd0;
57 localparam [3:0] ST_START_WAIT_SCL = 4'd1;
58 localparam [3:0] ST_START_SDA_LOW = 4'd2;
59 localparam [3:0] ST_START_FINISH = 4'd3;
60 localparam [3:0] ST_STOP_SETUP = 4'd4;
61 localparam [3:0] ST_STOP_RELEASE_SCL = 4'd5;
62 localparam [3:0] ST_STOP_WAIT_SCL = 4'd6;
63 localparam [3:0] ST_STOP_FINISH = 4'd7;
64 localparam [3:0] ST_WRITE_SETUP = 4'd8;
65 localparam [3:0] ST_WRITE_RELEASE_SCL = 4'd9;
66 localparam [3:0] ST_WRITE_WAIT_SCL = 4'd10;
67 localparam [3:0] ST_WRITE_FINISH = 4'd11;
68 localparam [3:0] ST_READ_SETUP = 4'd12;
69 localparam [3:0] ST_READ_RELEASE_SCL = 4'd13;
70 localparam [3:0] ST_READ_WAIT_SCL = 4'd14;
71 localparam [3:0] ST_READ_FINISH = 4'd15;
72
73 reg [3:0] state;
74 reg write_bit;
75
76 always @(posedge clk) begin
77 if (rst) begin
78 state <= ST_READY;
79 write_bit <= 1'b0;
80 cmd_ack <= 1'b0;
81 busy <= 1'b0;
82 al <= 1'b0;
83 bit_out <= 1'b0;
84 scl_drive_low <= 1'b0;
85 sda_drive_low <= 1'b0;
86 end else begin
87 cmd_ack <= 1'b0;
88
89 case (state)
90 ST_READY: begin
91 if (cmd_valid) begin
92 case (cmd)
93 CMD_START: begin
94 busy <= 1'b1;
95 scl_drive_low <= 1'b0;
96 sda_drive_low <= 1'b0;
97 state <= ST_START_WAIT_SCL;
98 end
99
100 CMD_STOP: begin
101 if (busy) begin
102 scl_drive_low <= 1'b1;
103 sda_drive_low <= 1'b1;
104 state <= ST_STOP_SETUP;
105 end
106 end
107
108 CMD_WRITE: begin
109 if (busy) begin
110 write_bit <= bit_in;
111 scl_drive_low <= 1'b1;
112 sda_drive_low <= ~bit_in;
113 state <= ST_WRITE_SETUP;
114 end
115 end
116
117 CMD_READ: begin
118 if (busy) begin
119 scl_drive_low <= 1'b1;
120 sda_drive_low <= 1'b0;
121 state <= ST_READ_SETUP;
122 end
123 end
124 endcase
125 end
126 end
127
128 ST_START_WAIT_SCL: begin
129 scl_drive_low <= 1'b0;
130 sda_drive_low <= 1'b0;
131 if (scl_i) begin
132 if (!sda_i) begin
133 al <= 1'b1;
134 end
135 state <= ST_START_SDA_LOW;
136 end
137 end
138
139 ST_START_SDA_LOW: begin
140 scl_drive_low <= 1'b0;
141 sda_drive_low <= 1'b1;
142 state <= ST_START_FINISH;
143 end
144
145 ST_START_FINISH: begin
146 scl_drive_low <= 1'b1;
147 sda_drive_low <= 1'b1;
148 cmd_ack <= 1'b1;
149 state <= ST_READY;
150 end
151
152 ST_STOP_SETUP: begin
153 scl_drive_low <= 1'b1;
154 sda_drive_low <= 1'b1;
155 state <= ST_STOP_RELEASE_SCL;
156 end
157
158 ST_STOP_RELEASE_SCL: begin
159 scl_drive_low <= 1'b0;
160 sda_drive_low <= 1'b1;
161 state <= ST_STOP_WAIT_SCL;
162 end
163
164 ST_STOP_WAIT_SCL: begin
165 scl_drive_low <= 1'b0;
166 sda_drive_low <= 1'b1;
167 if (scl_i) begin
168 state <= ST_STOP_FINISH;
169 end
170 end
171
172 ST_STOP_FINISH: begin
173 scl_drive_low <= 1'b0;
174 sda_drive_low <= 1'b0;
175 busy <= 1'b0;
176 cmd_ack <= 1'b1;
177 state <= ST_READY;
178 end
179
180 ST_WRITE_SETUP: begin
181 scl_drive_low <= 1'b1;
182 sda_drive_low <= ~write_bit;
183 state <= ST_WRITE_RELEASE_SCL;
184 end
185
186 ST_WRITE_RELEASE_SCL: begin
187 scl_drive_low <= 1'b0;
188 sda_drive_low <= ~write_bit;
189 state <= ST_WRITE_WAIT_SCL;
190 end
191
192 ST_WRITE_WAIT_SCL: begin
193 scl_drive_low <= 1'b0;
194 sda_drive_low <= ~write_bit;
195 if (scl_i) begin
196 if (write_bit && !sda_i) begin
197 al <= 1'b1;
198 end
199 state <= ST_WRITE_FINISH;
200 end
201 end
202
203 ST_WRITE_FINISH: begin
204 scl_drive_low <= 1'b1;
205 sda_drive_low <= ~write_bit;
206 cmd_ack <= 1'b1;
207 state <= ST_READY;
208 end
209
210 ST_READ_SETUP: begin
211 scl_drive_low <= 1'b1;
212 sda_drive_low <= 1'b0;
213 state <= ST_READ_RELEASE_SCL;
214 end
215
216 ST_READ_RELEASE_SCL: begin
217 scl_drive_low <= 1'b0;
218 sda_drive_low <= 1'b0;
219 state <= ST_READ_WAIT_SCL;
220 end
221
222 ST_READ_WAIT_SCL: begin
223 scl_drive_low <= 1'b0;
224 sda_drive_low <= 1'b0;
225 if (scl_i) begin
226 bit_out <= sda_i;
227 state <= ST_READ_FINISH;
228 end
229 end
230
231 ST_READ_FINISH: begin
232 scl_drive_low <= 1'b1;
233 sda_drive_low <= 1'b0;
234 cmd_ack <= 1'b1;
235 state <= ST_READY;
236 end
237
238 default: begin
239 state <= ST_READY;
240 end
241 endcase
242 end
243 end
244
245 endmodule
No file changes, the agent left the workspace untouched.
MISMATCH_COUNTS cmd_ack=0 busy=0 al=0 bit_out=0 scl=0 sda=0 __CHIPBENCH_MISMATCH_SUMMARY__: mismatches=0 samples=2351
Reproduce this trial: git checkout 2f94510 && PYTHONPATH=src python3 scripts/build_site.py , then open trial/trial_79c95e0c5c1b4199. Re-running the agent live requires EVAL_PLATFORM_ENABLE_OAUTH_SMOKE=1 and is non-deterministic.
Trial trial_79c95e0c5c1b4199 · verifier authoritative; classifier explanatory.