tests/test.sh exit code (0 → resolved); the classification below is post-hoc and cannot change it.pwd && rg --files -g 'dut.sv' -g '*.sv' -g '*.v'
Chunk ID: 43fd4f Wall time: 0.0000 seconds Process exited with code 1 Original token count: 2 Output: /app
ls -la /app
Chunk ID: e18912 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 17:12 ..
*** Begin Patch
*** Add File: /app/dut.sv
+module TopModule (
+ input logic clk,
+ input logic rst,
+ input logic cmd_valid,
+ input logic bit_in,
+ input logic scl_i,
+ input logic sda_i,
+ input logic [1:0] cmd,
+ output logic cmd_ack,
+ output logic busy,
+ output logic al,
+ output logic bit_out,
+ output logic scl_drive_low,
+ output logic sda_drive_low
+);
+
+ I2cBitController controller (
+ .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 I2cBitController (
+ input logic clk,
+ input logic rst,
+ input logic cmd_valid,
+ input logic bit_in,
+ input logic scl_i,
+ input logic sda_i,
+ input logic [1:0] cmd,
+ output logic cmd_ack,
+ output logic busy,
+ output logic al,
+ output logic bit_out,
+ output logic scl_drive_low,
+ output logic sda_drive_low
+);
+
+ localparam logic [1:0] CMD_START = 2'd0;
+ localparam logic [1:0] CMD_STOP = 2'd1;
+ localparam logic [1:0] CMD_WRITE = 2'd2;
+ localparam logic [1:0] CMD_READ = 2'd3;
+
+ typedef enum logic [4:0] {
+ ST_READY,
+ ST_START_ACCEPT,
+ ST_START_WAIT,
+ ST_START_SEEN,
+ ST_START_SDA_LOW,
+ ST_START_ACK,
+ ST_STOP_ACCEPT,
+ ST_STOP_SETUP,
+ ST_STOP_WAIT,
+ ST_STOP_SEEN,
+ ST_STOP_ACK,
+ ST_WRITE_ACCEPT,
+ ST_WRITE_SETUP,
+ ST_WRITE_WAIT,
+ ST_WRITE_SEEN,
+ ST_WRITE_ACK,
+ ST_READ_ACCEPT,
+ ST_READ_SETUP,
+ ST_READ_WAIT,
+ ST_READ_SEEN,
+ ST_READ_ACK
+ } state_t;
+
+ state_t state;
+ logic write_bit;
+
+ function automatic logic command_is_legal(input logic [1:0] command,
+ input logic is_busy);
+ command_is_legal = (command == CMD_START) || is_busy;
+ endfunction
+
+ task automatic hold_lines;
+ begin
+ scl_drive_low <= scl_drive_low;
+ sda_drive_low <= sda_drive_low;
+ end
+ endtask
+
+ task automatic accept_command;
+ begin
+ case (cmd)
+ CMD_START: begin
+ state <= ST_START_ACCEPT;
+ busy <= 1'b1;
+ scl_drive_low <= 1'b0;
+ sda_drive_low <= 1'b0;
+ end
+
+ CMD_STOP: begin
+ state <= ST_STOP_ACCEPT;
+ scl_drive_low <= 1'b1;
+ sda_drive_low <= 1'b1;
+ end
+
+ CMD_WRITE: begin
+ state <= ST_WRITE_ACCEPT;
+ write_bit <= bit_in;
+ scl_drive_low <= 1'b1;
+ sda_drive_low <= ~bit_in;
+ end
+
+ CMD_READ: begin
+ state <= ST_READ_ACCEPT;
+ scl_drive_low <= 1'b1;
+ sda_drive_low <= 1'b0;
+ end
+
+ default: begin
+ state <= ST_READY;
+ end
+ endcase
+
+ cmd_ack <= 1'b0;
+ end
+ endtask
+
+ always_ff @(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 && command_is_legal(cmd, busy)) begin
+ accept_command();
+ end
+ end
+
+ ST_START_ACCEPT: begin
+ state <= ST_START_WAIT;
+ scl_drive_low <= 1'b0;
+ sda_drive_low <= 1'b0;
+ end
+
+ ST_START_WAIT: begin
+ scl_drive_low <= 1'b0;
+ sda_drive_low <= 1'b0;
+ if (scl_i) begin
+ state <= ST_START_SEEN;
+ if (!sda_i) begin
+ al <= 1'b1;
+ end
+ end
+ end
+
+ ST_START_SEEN: begin
+ state <= ST_START_SDA_LOW;
+ scl_drive_low <= 1'b0;
+ sda_drive_low <= 1'b0;
+ if (scl_i && !sda_i) begin
+ al <= 1'b1;
+ end
+ end
+
+ ST_START_SDA_LOW: begin
+ state <= ST_START_ACK;
+ scl_drive_low <= 1'b0;
+ sda_drive_low <= 1'b1;
+ end
+
+ ST_START_ACK: begin
+ scl_drive_low <= 1'b1;
+ sda_drive_low <= 1'b1;
+ cmd_ack <= 1'b1;
+ if (cmd_valid && command_is_legal(cmd, busy)) begin
+ accept_command();
+ end else begin
+ state <= ST_READY;
+ end
+ end
+
+ ST_STOP_ACCEPT: begin
+ state <= ST_STOP_SETUP;
+ scl_drive_low <= 1'b1;
+ sda_drive_low <= 1'b1;
+ end
+
+ ST_STOP_SETUP: begin
+ state <= ST_STOP_WAIT;
+ scl_drive_low <= 1'b1;
+ sda_drive_low <= 1'b1;
+ end
+
+ ST_STOP_WAIT: begin
+ scl_drive_low <= 1'b0;
+ sda_drive_low <= 1'b1;
+ if (scl_i) begin
+ state <= ST_STOP_SEEN;
+ end
+ end
+
+ ST_STOP_SEEN: begin
+ state <= ST_STOP_ACK;
+ scl_drive_low <= 1'b0;
+ sda_drive_low <= 1'b1;
+ end
+
+ ST_STOP_ACK: begin
+ busy <= 1'b0;
+ scl_drive_low <= 1'b0;
+ sda_drive_low <= 1'b0;
+ cmd_ack <= 1'b1;
+ if (cmd_valid && command_is_legal(cmd, 1'b0)) begin
+ accept_command();
+ end else begin
+ state <= ST_READY;
+ end
+ end
+
+ ST_WRITE_ACCEPT: begin
+ state <= ST_WRITE_SETUP;
+ scl_drive_low <= 1'b1;
+ sda_drive_low <= ~write_bit;
+ end
+
+ ST_WRITE_SETUP: begin
+ state <= ST_WRITE_WAIT;
+ scl_drive_low <= 1'b1;
+ sda_drive_low <= ~write_bit;
+ end
+
+ ST_WRITE_WAIT: begin
+ scl_drive_low <= 1'b0;
+ sda_drive_low <= ~write_bit;
+ if (scl_i) begin
+ state <= ST_WRITE_SEEN;
+ if (write_bit && !sda_i) begin
+ al <= 1'b1;
+ end
+ end
+ end
+
+ ST_WRITE_SEEN: begin
+ state <= ST_WRITE_ACK;
+ scl_drive_low <= 1'b0;
+ sda_drive_low <= ~write_bit;
+ if (scl_i && write_bit && !sda_i) begin
+ al <= 1'b1;
+ end
+ end
+
+ ST_WRITE_ACK: begin
+ scl_drive_low <= 1'b1;
+ sda_drive_low <= ~write_bit;
+ cmd_ack <= 1'b1;
+ if (cmd_valid && command_is_legal(cmd, busy)) begin
+ accept_command();
+ end else begin
+ state <= ST_READY;
+ end
+ end
+
+ ST_READ_ACCEPT: begin
+ state <= ST_READ_SETUP;
+ scl_drive_low <= 1'b1;
+ sda_drive_low <= 1'b0;
+ end
+
+ ST_READ_SETUP: begin
+ state <= ST_READ_WAIT;
+ scl_drive_low <= 1'b1;
+ sda_drive_low <= 1'b0;
+ end
+
+ ST_READ_WAIT: begin
+ scl_drive_low <= 1'b0;
+ sda_drive_low <= 1'b0;
+ if (scl_i) begin
+ state <= ST_READ_SEEN;
+ bit_out <= sda_i;
+ end
+ end
+
+ ST_READ_SEEN: begin
+ state <= ST_READ_ACK;
+ scl_drive_low <= 1'b0;
+ sda_drive_low <= 1'b0;
+ end
+
+ ST_READ_ACK: begin
+ scl_drive_low <= 1'b1;
+ sda_drive_low <= 1'b0;
+ cmd_ack <= 1'b1;
+ if (cmd_valid && command_is_legal(cmd, busy)) begin
+ accept_command();
+ end else begin
+ state <= ST_READY;
+ end
+ end
+
+ default: begin
+ state <= ST_READY;
+ hold_lines();
+ end
+ endcase
+ end
+ end
+
+endmodule
*** End Patch
Exit code: 0
Wall time: 0 seconds
Output:
Success. Updated the following files:
A /app/dut.sv
*** Begin Patch
*** Update File: /app/dut.sv
@@
ST_START_SDA_LOW: begin
state <= ST_START_ACK;
- scl_drive_low <= 1'b0;
+ scl_drive_low <= 1'b1;
sda_drive_low <= 1'b1;
+ cmd_ack <= 1'b1;
end
ST_START_ACK: begin
- scl_drive_low <= 1'b1;
- sda_drive_low <= 1'b1;
- cmd_ack <= 1'b1;
if (cmd_valid && command_is_legal(cmd, busy)) begin
accept_command();
end else begin
state <= ST_READY;
@@
ST_STOP_SEEN: begin
state <= ST_STOP_ACK;
- scl_drive_low <= 1'b0;
- sda_drive_low <= 1'b1;
+ busy <= 1'b0;
+ scl_drive_low <= 1'b0;
+ sda_drive_low <= 1'b0;
+ cmd_ack <= 1'b1;
end
ST_STOP_ACK: begin
- busy <= 1'b0;
- scl_drive_low <= 1'b0;
- sda_drive_low <= 1'b0;
- cmd_ack <= 1'b1;
if (cmd_valid && command_is_legal(cmd, 1'b0)) begin
accept_command();
end else begin
state <= ST_READY;
@@
ST_WRITE_SEEN: begin
state <= ST_WRITE_ACK;
- scl_drive_low <= 1'b0;
+ scl_drive_low <= 1'b1;
sda_drive_low <= ~write_bit;
+ cmd_ack <= 1'b1;
if (scl_i && write_bit && !sda_i) begin
al <= 1'b1;
end
end
ST_WRITE_ACK: begin
- scl_drive_low <= 1'b1;
- sda_drive_low <= ~write_bit;
- cmd_ack <= 1'b1;
if (cmd_valid && command_is_legal(cmd, busy)) begin
accept_command();
end else begin
state <= ST_READY;
@@
ST_READ_SEEN: begin
state <= ST_READ_ACK;
- scl_drive_low <= 1'b0;
+ scl_drive_low <= 1'b1;
sda_drive_low <= 1'b0;
+ cmd_ack <= 1'b1;
end
ST_READ_ACK: begin
- scl_drive_low <= 1'b1;
- sda_drive_low <= 1'b0;
- cmd_ack <= 1'b1;
if (cmd_valid && command_is_legal(cmd, busy)) begin
accept_command();
end else begin
*** End Patch
Exit code: 0
Wall time: 0 seconds
Output:
Success. Updated the following files:
M /app/dut.sv
sed -n '1,260p' /app/dut.sv
Chunk ID: 15029a
Wall time: 0.0000 seconds
Process exited with code 0
Original token count: 1947
Output:
module TopModule (
input logic clk,
input logic rst,
input logic cmd_valid,
input logic bit_in,
input logic scl_i,
input logic sda_i,
input logic [1:0] cmd,
output logic cmd_ack,
output logic busy,
output logic al,
output logic bit_out,
output logic scl_drive_low,
output logic sda_drive_low
);
I2cBitController controller (
.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 I2cBitController (
input logic clk,
input logic rst,
input logic cmd_valid,
input logic bit_in,
input logic scl_i,
input logic sda_i,
input logic [1:0] cmd,
output logic cmd_ack,
output logic busy,
output logic al,
output logic bit_out,
output logic scl_drive_low,
output logic sda_drive_low
);
localparam logic [1:0] CMD_START = 2'd0;
localparam logic [1:0] CMD_STOP = 2'd1;
localparam logic [1:0] CMD_WRITE = 2'd2;
localparam logic [1:0] CMD_READ = 2'd3;
typedef enum logic [4:0] {
ST_READY,
ST_START_ACCEPT,
ST_START_WAIT,
ST_START_SEEN,
ST_START_SDA_LOW,
ST_START_ACK,
ST_STOP_ACCEPT,
ST_STOP_SETUP,
ST_STOP_WAIT,
ST_STOP_SEEN,
ST_STOP_ACK,
ST_WRITE_ACCEPT,
ST_WRITE_SETUP,
ST_WRITE_WAIT,
ST_WRITE_SEEN,
ST_WRITE_ACK,
ST_READ_ACCEPT,
ST_READ_SETUP,
ST_READ_WAIT,
ST_READ_SEEN,
ST_READ_ACK
} state_t;
state_t state;
logic write_bit;
function automatic logic command_is_legal(input logic [1:0] command,
input logic is_busy);
command_is_legal = (command == CMD_START) || is_busy;
endfunction
task automatic hold_lines;
begin
scl_drive_low <= scl_drive_low;
sda_drive_low <= sda_drive_low;
end
endtask
task automatic accept_command;
begin
case (cmd)
CMD_START: begin
state <= ST_START_ACCEPT;
busy <= 1'b1;
scl_drive_low <= 1'b0;
sda_drive_low <= 1'b0;
end
CMD_STOP: begin
state <= ST_STOP_ACCEPT;
scl_drive_low <= 1'b1;
sda_drive_low <= 1'b1;
end
CMD_WRITE: begin
state <= ST_WRITE_ACCEPT;
write_bit <= bit_in;
scl_drive_low <= 1'b1;
sda_drive_low <= ~bit_in;
end
CMD_READ: begin
state <= ST_READ_ACCEPT;
scl_drive_low <= 1'b1;
sda_drive_low <= 1'b0;
end
default: begin
state <= ST_READY;
end
endcase
cmd_ack <= 1'b0;
end
endtask
always_ff @(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 && command_is_legal(cmd, busy)) begin
accept_command();
end
end
ST_START_ACCEPT: begin
state <= ST_START_WAIT;
scl_drive_low <= 1'b0;
sda_drive_low <= 1'b0;
end
ST_START_WAIT: begin
scl_drive_low <= 1'b0;
sda_drive_low <= 1'b0;
if (scl_i) begin
state <= ST_START_SEEN;
if (!sda_i) begin
al <= 1'b1;
end
end
end
ST_START_SEEN: begin
state <= ST_START_SDA_LOW;
scl_drive_low <= 1'b0;
sda_drive_low <= 1'b0;
if (scl_i && !sda_i) begin
al <= 1'b1;
end
end
ST_START_SDA_LOW: begin
state <= ST_START_ACK;
scl_drive_low <= 1'b1;
sda_drive_low <= 1'b1;
cmd_ack <= 1'b1;
end
ST_START_ACK: begin
if (cmd_valid && command_is_legal(cmd, busy)) begin
accept_command();
end else begin
state <= ST_READY;
end
end
ST_STOP_ACCEPT: begin
state <= ST_STOP_SETUP;
scl_drive_low <= 1'b1;
sda_drive_low <= 1'b1;
end
ST_STOP_SETUP: begin
state <= ST_STOP_WAIT;
scl_drive_low <= 1'b1;
sda_drive_low <= 1'b1;
end
ST_STOP_WAIT: begin
scl_drive_low <= 1'b0;
sda_drive_low <= 1'b1;
if (scl_i) begin
state <= ST_STOP_SEEN;
end
end
ST_STOP_SEEN: begin
state <= ST_STOP_ACK;
busy <= 1'b0;
scl_drive_low <= 1'b0;
sda_drive_low <= 1'b0;
cmd_ack <= 1'b1;
end
ST_STOP_ACK: begin
if (cmd_valid && command_is_legal(cmd, 1'b0)) begin
accept_command();
end else begin
state <= ST_READY;
end
end
ST_WRITE_ACCEPT: begin
state <= ST_WRITE_SETUP;
scl_drive_low <= 1'b1;
sda_drive_low <= ~write_bit;
end
ST_WRITE_SETUP: begin
state <= ST_WRITE_WAIT;
scl_drive_low <= 1'b1;
sda_drive_low <= ~write_bit;
end
ST_WRITE_WAIT: begin
scl_drive_low <= 1'b0;
sda_drive_low <= ~write_bit;
if (scl_i) begin
state <= ST_WRITE_SEEN;
if (write_bit && !sda_i) begin
al <= 1'b1;
end
end
end
ST_WRITE_SEEN: begin
state <= ST_WRITE_ACK;
scl_drive_low <= 1'b1;
sda_drive_low <= ~write_bit;
cmd_ack <= 1'b1;
if (scl_i && write_bit && !sda_i) begin
al <= 1'b1;
end
command -v iverilog || command -v verilator || true
Chunk ID: 755539 Wall time: 0.0000 seconds Process exited with code 0 Original token count: 5 Output: /usr/bin/iverilog
sed -n '261,520p' /app/dut.sv && iverilog -g2012 -Wall -tnull /app/dut.sv
Chunk ID: f8cbcd
Wall time: 0.0000 seconds
Process exited with code 0
Original token count: 416
Output:
end
ST_WRITE_ACK: begin
if (cmd_valid && command_is_legal(cmd, busy)) begin
accept_command();
end else begin
state <= ST_READY;
end
end
ST_READ_ACCEPT: begin
state <= ST_READ_SETUP;
scl_drive_low <= 1'b1;
sda_drive_low <= 1'b0;
end
ST_READ_SETUP: begin
state <= ST_READ_WAIT;
scl_drive_low <= 1'b1;
sda_drive_low <= 1'b0;
end
ST_READ_WAIT: begin
scl_drive_low <= 1'b0;
sda_drive_low <= 1'b0;
if (scl_i) begin
state <= ST_READ_SEEN;
bit_out <= sda_i;
end
end
ST_READ_SEEN: begin
state <= ST_READ_ACK;
scl_drive_low <= 1'b1;
sda_drive_low <= 1'b0;
cmd_ack <= 1'b1;
end
ST_READ_ACK: begin
if (cmd_valid && command_is_legal(cmd, busy)) begin
accept_command();
end else begin
state <= ST_READY;
end
end
default: begin
state <= ST_READY;
hold_lines();
end
endcase
end
end
endmodule
*** Begin Patch
*** Update File: /app/dut.sv
@@
ST_START_SEEN: begin
state <= ST_START_SDA_LOW;
scl_drive_low <= 1'b0;
- sda_drive_low <= 1'b0;
+ sda_drive_low <= 1'b1;
if (scl_i && !sda_i) begin
al <= 1'b1;
end
end
@@
ST_STOP_SETUP: begin
state <= ST_STOP_WAIT;
- scl_drive_low <= 1'b1;
+ scl_drive_low <= 1'b0;
sda_drive_low <= 1'b1;
end
@@
ST_WRITE_SETUP: begin
state <= ST_WRITE_WAIT;
- scl_drive_low <= 1'b1;
+ scl_drive_low <= 1'b0;
sda_drive_low <= ~write_bit;
end
@@
ST_READ_SETUP: begin
state <= ST_READ_WAIT;
- scl_drive_low <= 1'b1;
+ scl_drive_low <= 1'b0;
sda_drive_low <= 1'b0;
end
*** End Patch
Exit code: 0
Wall time: 0 seconds
Output:
Success. Updated the following files:
M /app/dut.sv
iverilog -g2012 -Wall -tnull /app/dut.sv
Chunk ID: 488cfe Wall time: 0.0000 seconds Process exited with code 0 Original token count: 0 Output:
command -v verilator || true
Chunk ID: 3f4fd1 Wall time: 0.0000 seconds Process exited with code 0 Original token count: 0 Output:
*** Begin Patch
*** Add File: /app/tb_tmp.sv
+module tb;
+ logic clk;
+ logic rst;
+ logic cmd_valid;
+ logic bit_in;
+ logic scl_i;
+ logic sda_i;
+ logic [1:0] cmd;
+ logic cmd_ack;
+ logic busy;
+ logic al;
+ logic bit_out;
+ logic scl_drive_low;
+ logic 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 automatic tick;
+ begin
+ @(posedge clk);
+ #1;
+ end
+ endtask
+
+ task automatic expect(input logic exp_ack,
+ input logic exp_busy,
+ input logic exp_al,
+ input logic exp_bit_out,
+ input logic exp_scl_low,
+ input logic exp_sda_low,
+ input string label);
+ begin
+ if ({cmd_ack, busy, al, bit_out, scl_drive_low, sda_drive_low} !==
+ {exp_ack, exp_busy, exp_al, exp_bit_out, exp_scl_low, exp_sda_low}) begin
+ $display("FAIL %s: got ack=%0b busy=%0b al=%0b bit=%0b scl=%0b sda=%0b",
+ label, cmd_ack, busy, al, bit_out, scl_drive_low, sda_drive_low);
+ $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();
+ expect(0, 0, 0, 0, 0, 0, "reset");
+
+ rst = 1'b0;
+ cmd_valid = 1'b1;
+ cmd = 2'd1;
+ tick();
+ expect(0, 0, 0, 0, 0, 0, "illegal stop idle");
+
+ cmd = 2'd0;
+ tick();
+ expect(0, 1, 0, 0, 0, 0, "start accept");
+
+ cmd_valid = 1'b0;
+ tick();
+ expect(0, 1, 0, 0, 0, 0, "start wait");
+
+ tick();
+ expect(0, 1, 0, 0, 0, 0, "start seen");
+
+ tick();
+ expect(0, 1, 0, 0, 0, 1, "start sda low");
+
+ tick();
+ expect(1, 1, 0, 0, 1, 1, "start ack");
+
+ cmd_valid = 1'b1;
+ cmd = 2'd1;
+ tick();
+ expect(0, 1, 0, 0, 1, 1, "stop accept after ack");
+
+ cmd_valid = 1'b0;
+ tick();
+ expect(0, 1, 0, 0, 1, 1, "stop setup");
+
+ tick();
+ expect(0, 1, 0, 0, 0, 1, "stop wait");
+
+ tick();
+ expect(0, 1, 0, 0, 0, 1, "stop seen");
+
+ tick();
+ expect(1, 0, 0, 0, 0, 0, "stop ack");
+
+ cmd_valid = 1'b1;
+ cmd = 2'd0;
+ tick();
+ cmd_valid = 1'b0;
+ repeat (4) tick();
+ expect(1, 1, 0, 0, 1, 1, "restart ack");
+
+ cmd_valid = 1'b1;
+ cmd = 2'd3;
+ sda_i = 1'b1;
+ tick();
+ expect(0, 1, 0, 0, 1, 0, "read accept");
+
+ cmd_valid = 1'b0;
+ tick();
+ expect(0, 1, 0, 0, 1, 0, "read setup");
+
+ tick();
+ expect(0, 1, 0, 0, 0, 0, "read wait");
+
+ tick();
+ expect(0, 1, 0, 1, 0, 0, "read seen sampled");
+
+ tick();
+ expect(1, 1, 0, 1, 1, 0, "read ack");
+
+ cmd_valid = 1'b1;
+ cmd = 2'd2;
+ bit_in = 1'b1;
+ sda_i = 1'b0;
+ tick();
+ cmd_valid = 1'b0;
+ tick();
+ tick();
+ expect(0, 1, 0, 1, 0, 0, "write wait one");
+
+ tick();
+ expect(0, 1, 1, 1, 0, 0, "write al seen");
+
+ tick();
+ expect(1, 1, 1, 1, 1, 0, "write ack al sticky");
+
+ $display("PASS");
+ $finish;
+ end
+endmodule
*** End Patch
Exit code: 0
Wall time: 0 seconds
Output:
Success. Updated the following files:
A /app/tb_tmp.sv
iverilog -g2012 -Wall -o /tmp/dut_tb.vvp /app/dut.sv /app/tb_tmp.sv
Chunk ID: 0e4fa3 Wall time: 0.0000 seconds Process exited with code 88 Original token count: 948 Output: /app/tb_tmp.sv:42: syntax error /app/tb_tmp.sv:48: error: Invalid module item. /app/tb_tmp.sv:49: syntax error /app/tb_tmp.sv:53: error: Invalid module item. /app/tb_tmp.sv:55: syntax error /app/tb_tmp.sv:60: error: Invalid module item. /app/tb_tmp.sv:61: syntax error /app/tb_tmp.sv:61: error: Invalid module instantiation /app/tb_tmp.sv:62: error: Invalid module instantiation /app/tb_tmp.sv:63: error: Invalid module instantiation /app/tb_tmp.sv:64: error: Invalid module instantiation /app/tb_tmp.sv:65: error: Invalid module instantiation /app/tb_tmp.sv:67: syntax error /app/tb_tmp.sv:67: error: Invalid module item. /app/tb_tmp.sv:69: syntax error /app/tb_tmp.sv:69: error: Invalid module instantiation /app/tb_tmp.sv:70: error: Invalid module instantiation /app/tb_tmp.sv:71: error: Invalid module instantiation /app/tb_tmp.sv:73: syntax error /app/tb_tmp.sv:73: error: Invalid module item. /app/tb_tmp.sv:75: syntax error /app/tb_tmp.sv:75: error: Invalid module instantiation /app/tb_tmp.sv:77: syntax error /app/tb_tmp.sv:77: error: Invalid module item. /app/tb_tmp.sv:79: syntax error /app/tb_tmp.sv:79: error: Invalid module instantiation /app/tb_tmp.sv:81: syntax error /app/tb_tmp.sv:81: error: Invalid module item. /app/tb_tmp.sv:84: syntax error /app/tb_tmp.sv:84: error: Invalid module item. /app/tb_tmp.sv:87: syntax error /app/tb_tmp.sv:87: error: Invalid module item. /app/tb_tmp.sv:90: syntax error /app/tb_tmp.sv:90: error: Invalid module item. /app/tb_tmp.sv:92: syntax error /app/tb_tmp.sv:92: error: Invalid module instantiation /app/tb_tmp.sv:93: error: Invalid module instantiation /app/tb_tmp.sv:95: syntax error /app/tb_tmp.sv:95: error: Invalid module item. /app/tb_tmp.sv:97: syntax error /app/tb_tmp.sv:97: error: Invalid module instantiation /app/tb_tmp.sv:99: syntax error /app/tb_tmp.sv:99: error: Invalid module item. /app/tb_tmp.sv:102: syntax error /app/tb_tmp.sv:102: error: Invalid module item. /app/tb_tmp.sv:105: syntax error /app/tb_tmp.sv:105: error: Invalid module item. /app/tb_tmp.sv:108: syntax error /app/tb_tmp.sv:108: error: Invalid module item. /app/tb_tmp.sv:110: syntax error /app/tb_tmp.sv:110: error: Invalid module instantiation /app/tb_tmp.sv:111: error: Invalid module instantiation /app/tb_tmp.sv:113: syntax error /app/tb_tmp.sv:113: error: Invalid module instantiation /app/tb_tmp.sv:114: error: Invalid module item. /app/tb_tmp.sv:115: syntax error /app/tb_tmp.sv:115: error: Invalid module item. /app/tb_tmp.sv:117: syntax error /app/tb_tmp.sv:117: error: Invalid module instantiation /app/tb_tmp.sv:118: error: Invalid module instantiation /app/tb_tmp.sv:119: error: Invalid module instantiation /app/tb_tmp.sv:121: syntax error /app/tb_tmp.sv:121: error: Invalid module item. /app/tb_tmp.sv:123: syntax error /app/tb_tmp.sv:123: error: Invalid module instantiation /app/tb_tmp.sv:125: syntax error /app/tb_tmp.sv:125: error: Invalid module item. /app/tb_tmp.sv:128: syntax error /app/tb_tmp.sv:128: error: Invalid module item. /app/tb_tmp.sv:131: syntax error /app/tb_tmp.sv:131: error: Invalid module item. /app/tb_tmp.sv:134: syntax error /app/tb_tmp.sv:134: error: Invalid module item. /app/tb_tmp.sv:136: syntax error /app/tb_tmp.sv:136: error: Invalid module instantiation /app/tb_tmp.sv:137: error: Invalid module instantiation /app/tb_tmp.sv:138: error: Invalid module instantiation /app/tb_tmp.sv:139: error: Invalid module instantiation /app/tb_tmp.sv:141: syntax error /app/tb_tmp.sv:141: error: Invalid module instantiation /app/tb_tmp.sv:144: syntax error /app/tb_tmp.sv:144: error: Invalid module item. /app/tb_tmp.sv:147: syntax error /app/tb_tmp.sv:147: error: Invalid module item. /app/tb_tmp.sv:150: syntax error /app/tb_tmp.sv:150: error: Invalid module item. /app/tb_tmp.sv:154: syntax error I give up.
nl -ba /app/tb_tmp.sv | sed -n '35,55p'
Chunk ID: cb7d92
Wall time: 0.0000 seconds
Process exited with code 0
Original token count: 250
Output:
35 task automatic tick;
36 begin
37 @(posedge clk);
38 #1;
39 end
40 endtask
41
42 task automatic expect(input logic exp_ack,
43 input logic exp_busy,
44 input logic exp_al,
45 input logic exp_bit_out,
46 input logic exp_scl_low,
47 input logic exp_sda_low,
48 input string label);
49 begin
50 if ({cmd_ack, busy, al, bit_out, scl_drive_low, sda_drive_low} !==
51 {exp_ack, exp_busy, exp_al, exp_bit_out, exp_scl_low, exp_sda_low}) begin
52 $display("FAIL %s: got ack=%0b busy=%0b al=%0b bit=%0b scl=%0b sda=%0b",
53 label, cmd_ack, busy, al, bit_out, scl_drive_low, sda_drive_low);
54 $finish;
55 end
perl -0pi -e 's/task automatic expect/task automatic check_outputs/g; s/\bexpect\(/check_outputs(/g' /app/tb_tmp.sv
Chunk ID: c1091b Wall time: 0.0000 seconds Process exited with code 0 Original token count: 0 Output:
iverilog -g2012 -Wall -o /tmp/dut_tb.vvp /app/dut.sv /app/tb_tmp.sv
Chunk ID: 9cd561 Wall time: 0.0000 seconds Process exited with code 0 Original token count: 0 Output:
vvp /tmp/dut_tb.vvp
Chunk ID: 55fdfc Wall time: 0.0000 seconds Process exited with code 0 Original token count: 13 Output: PASS /app/tb_tmp.sv:153: $finish called at 266 (1s)
*** Begin Patch *** Delete File: /app/tb_tmp.sv *** End Patch Exit code: 0 Wall time: 0 seconds Output: Success. Updated the following files: D /app/tb_tmp.sv
iverilog -g2012 -Wall -tnull /app/dut.sv
Chunk ID: a6d03e Wall time: 0.0000 seconds Process exited with code 0 Original token count: 0 Output:
ls -la /app && nl -ba /app/dut.sv | sed -n '1,260p'
Chunk ID: e21932
Wall time: 0.0000 seconds
Process exited with code 0
Original token count: 2438
Output:
total 20
drwxr-xr-x 1 root root 4096 Jun 20 17:17 .
drwxr-xr-x 1 root root 4096 Jun 20 17:12 ..
-rw-r--r-- 1 root root 9449 Jun 20 17:16 dut.sv
1 module TopModule (
2 input logic clk,
3 input logic rst,
4 input logic cmd_valid,
5 input logic bit_in,
6 input logic scl_i,
7 input logic sda_i,
8 input logic [1:0] cmd,
9 output logic cmd_ack,
10 output logic busy,
11 output logic al,
12 output logic bit_out,
13 output logic scl_drive_low,
14 output logic sda_drive_low
15 );
16
17 I2cBitController controller (
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 I2cBitController (
36 input logic clk,
37 input logic rst,
38 input logic cmd_valid,
39 input logic bit_in,
40 input logic scl_i,
41 input logic sda_i,
42 input logic [1:0] cmd,
43 output logic cmd_ack,
44 output logic busy,
45 output logic al,
46 output logic bit_out,
47 output logic scl_drive_low,
48 output logic sda_drive_low
49 );
50
51 localparam logic [1:0] CMD_START = 2'd0;
52 localparam logic [1:0] CMD_STOP = 2'd1;
53 localparam logic [1:0] CMD_WRITE = 2'd2;
54 localparam logic [1:0] CMD_READ = 2'd3;
55
56 typedef enum logic [4:0] {
57 ST_READY,
58 ST_START_ACCEPT,
59 ST_START_WAIT,
60 ST_START_SEEN,
61 ST_START_SDA_LOW,
62 ST_START_ACK,
63 ST_STOP_ACCEPT,
64 ST_STOP_SETUP,
65 ST_STOP_WAIT,
66 ST_STOP_SEEN,
67 ST_STOP_ACK,
68 ST_WRITE_ACCEPT,
69 ST_WRITE_SETUP,
70 ST_WRITE_WAIT,
71 ST_WRITE_SEEN,
72 ST_WRITE_ACK,
73 ST_READ_ACCEPT,
74 ST_READ_SETUP,
75 ST_READ_WAIT,
76 ST_READ_SEEN,
77 ST_READ_ACK
78 } state_t;
79
80 state_t state;
81 logic write_bit;
82
83 function automatic logic command_is_legal(input logic [1:0] command,
84 input logic is_busy);
85 command_is_legal = (command == CMD_START) || is_busy;
86 endfunction
87
88 task automatic hold_lines;
89 begin
90 scl_drive_low <= scl_drive_low;
91 sda_drive_low <= sda_drive_low;
92 end
93 endtask
94
95 task automatic accept_command;
96 begin
97 case (cmd)
98 CMD_START: begin
99 state <= ST_START_ACCEPT;
100 busy <= 1'b1;
101 scl_drive_low <= 1'b0;
102 sda_drive_low <= 1'b0;
103 end
104
105 CMD_STOP: begin
106 state <= ST_STOP_ACCEPT;
107 scl_drive_low <= 1'b1;
108 sda_drive_low <= 1'b1;
109 end
110
111 CMD_WRITE: begin
112 state <= ST_WRITE_ACCEPT;
113 write_bit <= bit_in;
114 scl_drive_low <= 1'b1;
115 sda_drive_low <= ~bit_in;
116 end
117
118 CMD_READ: begin
119 state <= ST_READ_ACCEPT;
120 scl_drive_low <= 1'b1;
121 sda_drive_low <= 1'b0;
122 end
123
124 default: begin
125 state <= ST_READY;
126 end
127 endcase
128
129 cmd_ack <= 1'b0;
130 end
131 endtask
132
133 always_ff @(posedge clk) begin
134 if (rst) begin
135 state <= ST_READY;
136 write_bit <= 1'b0;
137 cmd_ack <= 1'b0;
138 busy <= 1'b0;
139 al <= 1'b0;
140 bit_out <= 1'b0;
141 scl_drive_low <= 1'b0;
142 sda_drive_low <= 1'b0;
143 end else begin
144 cmd_ack <= 1'b0;
145
146 case (state)
147 ST_READY: begin
148 if (cmd_valid && command_is_legal(cmd, busy)) begin
149 accept_command();
150 end
151 end
152
153 ST_START_ACCEPT: begin
154 state <= ST_START_WAIT;
155 scl_drive_low <= 1'b0;
156 sda_drive_low <= 1'b0;
157 end
158
159 ST_START_WAIT: begin
160 scl_drive_low <= 1'b0;
161 sda_drive_low <= 1'b0;
162 if (scl_i) begin
163 state <= ST_START_SEEN;
164 if (!sda_i) begin
165 al <= 1'b1;
166 end
167 end
168 end
169
170 ST_START_SEEN: begin
171 state <= ST_START_SDA_LOW;
172 scl_drive_low <= 1'b0;
173 sda_drive_low <= 1'b1;
174 if (scl_i && !sda_i) begin
175 al <= 1'b1;
176 end
177 end
178
179 ST_START_SDA_LOW: begin
180 state <= ST_START_ACK;
181 scl_drive_low <= 1'b1;
182 sda_drive_low <= 1'b1;
183 cmd_ack <= 1'b1;
184 end
185
186 ST_START_ACK: begin
187 if (cmd_valid && command_is_legal(cmd, busy)) begin
188 accept_command();
189 end else begin
190 state <= ST_READY;
191 end
192 end
193
194 ST_STOP_ACCEPT: begin
195 state <= ST_STOP_SETUP;
196 scl_drive_low <= 1'b1;
197 sda_drive_low <= 1'b1;
198 end
199
200 ST_STOP_SETUP: begin
201 state <= ST_STOP_WAIT;
202 scl_drive_low <= 1'b0;
203 sda_drive_low <= 1'b1;
204 end
205
206 ST_STOP_WAIT: begin
207 scl_drive_low <= 1'b0;
208 sda_drive_low <= 1'b1;
209 if (scl_i) begin
210 state <= ST_STOP_SEEN;
211 end
212 end
213
214 ST_STOP_SEEN: begin
215 state <= ST_STOP_ACK;
216 busy <= 1'b0;
217 scl_drive_low <= 1'b0;
218 sda_drive_low <= 1'b0;
219 cmd_ack <= 1'b1;
220 end
221
222 ST_STOP_ACK: begin
223 if (cmd_valid && command_is_legal(cmd, 1'b0)) begin
224 accept_command();
225 end else begin
226 state <= ST_READY;
227 end
228 end
229
230 ST_WRITE_ACCEPT: begin
231 state <= ST_WRITE_SETUP;
232 scl_drive_low <= 1'b1;
233 sda_drive_low <= ~write_bit;
234 end
235
236 ST_WRITE_SETUP: begin
237 state <= ST_WRITE_WAIT;
238 scl_drive_low <= 1'b0;
239 sda_drive_low <= ~write_bit;
240 end
241
242 ST_WRITE_WAIT: begin
243 scl_drive_low <= 1'b0;
244 sda_drive_low <= ~write_bit;
245 if (scl_i) begin
246 state <= ST_WRITE_SEEN;
247 if (write_bit && !sda_i) begin
248 al <= 1'b1;
249 end
250 end
251 end
252
253 ST_WRITE_SEEN: begin
254 state <= ST_WRITE_ACK;
255 scl_drive_low <= 1'b1;
256 sda_drive_low <= ~write_bit;
257 cmd_ack <= 1'b1;
258 if (scl_i && write_bit && !sda_i) begin
259 al <= 1'b1;
260 end
nl -ba /app/dut.sv | sed -n '261,360p'
Chunk ID: 81141a Wall time: 0.0000 seconds Process exited with code 0 Original token count: 513 Output: 261 end 262 263 ST_WRITE_ACK: begin 264 if (cmd_valid && command_is_legal(cmd, busy)) begin 265 accept_command(); 266 end else begin 267 state <= ST_READY; 268 end 269 end 270 271 ST_READ_ACCEPT: begin 272 state <= ST_READ_SETUP; 273 scl_drive_low <= 1'b1; 274 sda_drive_low <= 1'b0; 275 end 276 277 ST_READ_SETUP: begin 278 state <= ST_READ_WAIT; 279 scl_drive_low <= 1'b0; 280 sda_drive_low <= 1'b0; 281 end 282 283 ST_READ_WAIT: begin 284 scl_drive_low <= 1'b0; 285 sda_drive_low <= 1'b0; 286 if (scl_i) begin 287 state <= ST_READ_SEEN; 288 bit_out <= sda_i; 289 end 290 end 291 292 ST_READ_SEEN: begin 293 state <= ST_READ_ACK; 294 scl_drive_low <= 1'b1; 295 sda_drive_low <= 1'b0; 296 cmd_ack <= 1'b1; 297 end 298 299 ST_READ_ACK: begin 300 if (cmd_valid && command_is_legal(cmd, busy)) begin 301 accept_command(); 302 end else begin 303 state <= ST_READY; 304 end 305 end 306 307 default: begin 308 state <= ST_READY; 309 hold_lines(); 310 end 311 endcase 312 end 313 end 314 315 endmodule
*** Begin Patch
*** Update File: /app/dut.sv
@@
- task automatic hold_lines;
- begin
- scl_drive_low <= scl_drive_low;
- sda_drive_low <= sda_drive_low;
- end
- endtask
-
task automatic accept_command;
begin
@@
default: begin
state <= ST_READY;
- hold_lines();
end
endcase
*** End Patch
Exit code: 0
Wall time: 0 seconds
Output:
Success. Updated the following files:
M /app/dut.sv
iverilog -g2012 -Wall -tnull /app/dut.sv
Chunk ID: 5d8f29 Wall time: 0.0000 seconds Process exited with code 0 Original token count: 0 Output:
ls -la /app
Chunk ID: 0b2983 Wall time: 0.0000 seconds Process exited with code 0 Original token count: 36 Output: total 20 drwxr-xr-x 1 root root 4096 Jun 20 17:17 . drwxr-xr-x 1 root root 4096 Jun 20 17:12 .. -rw-r--r-- 1 root root 9257 Jun 20 17:17 dut.sv
No file changes, the agent left the workspace untouched.
MISMATCH_COUNTS cmd_ack=108 busy=0 al=582 bit_out=0 scl=54 sda=54 __CHIPBENCH_MISMATCH_SUMMARY__: mismatches=798 samples=2351
Reproduce this trial: git checkout 2f94510 && PYTHONPATH=src python3 scripts/build_site.py , then open trial/trial_4bce4783740943ec. Re-running the agent live requires EVAL_PLATFORM_ENABLE_OAUTH_SMOKE=1 and is non-deterministic.
Trial trial_4bce4783740943ec · verifier authoritative; classifier explanatory.