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20 changes: 11 additions & 9 deletions README.md
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Expand Up @@ -41,50 +41,52 @@
wave sim:/design_1_wrapper/design_1_i/core_0/*
```
### Simulation without GDB
7. After Linux prompt shows up in QEMU use following commands:
7. After Linux login shows up in QEMU use: 'petalinux' and specify the password.

8. After Linux prompt shows up in QEMU use following commands:

```sh
cd /home/patalinux/pgmpa
./pgmpa powernn/powernn_100
sudo ./pgmpa powernn/powernn_100
```
### Debugging with GDB

7.1. After Linux prompt shows up in QEMU, start GDB using commands:
8.1. After Linux prompt shows up in QEMU, start GDB using commands:

```sh
cd /home/patalinux/pgmpa
gdb --args ./pgmpa powernn/powernn_100
sudo gdb --args ./pgmpa powernn/powernn_100
```

7.2. Once GDB finishes loading, insert a breakpoint. For example, let's place
8.2. Once GDB finishes loading, insert a breakpoint. For example, let's place
breakpoint at the end of the register clearing loop:

```gdb
break 144
```

7.3. Now, run the program:
8.3. Now, run the program:

```gdb
run
```

7.4. The program should print names of the cleared registers and stop at the
8.4. The program should print names of the cleared registers and stop at the
breakpoint. Switch to Riviera and pause the simulation using the "STOP"
button or the Ctrl+Shift+C key combination. This should generate the waveform
of the operation.

**NOTE** Until the the simulation is resumed, Linux running inside QEMU will
be frozen and keyboard input will not be processed.

7.5. Press the green "play" button in Riviera, or press the Shift+F5 key combination to
8.5. Press the green "play" button in Riviera, or press the Shift+F5 key combination to
resume the simulation. Switch to the QEMU window again continue running the
program:

```gdb
continue
```
###
8. When `Finish PROG` appears on the screen, press any key. The program should
9. When `Finish PROG` appears on the screen, press any key. The program should
print the result and finish. On the waveform in Riviera, `m00_axis_tdata`
port should now display the transferred data.