projects / sigrok-dumps.git / blame
| Commit | Line | Data |
|---|---|---|
| 9f58d852 PA |
1 | ------------------------------------------------------------------------------- |
| 2 | ARM ETM/ITM Tracing | |
| 3 | ------------------------------------------------------------------------------- | |
| 4 | ||
| 5 | This is an example capture from ARM Cortex-M3 ETM/ITM trace stream. | |
| 6 | ||
| 7 | The trace was captured from LPC1769 microcontroller while running | |
| 8 | this software (revision bffb804): | |
| 9 | https://github.com/PetteriAimonen/Smoothieware/tree/bffb804 | |
| 10 | ||
| 11 | The data has been captured with the CPU running at 4 MHz at 12 MHz samplerate, | |
| 12 | to capture all the data. It has then been cut to a smaller fragment and | |
| 13 | samplerate set to 300MHz so that times correspond to realtime speeds. | |
| 14 | ||
| 15 | Configuration for decoding: | |
| 16 | - UART signal 0, baudrate 100000000 | |
| 17 | - TPIU stream 2 | |
| 18 | - ARM_ETMv3, elffile=smoothieware.elf | |
| 19 | ||
| f192ae2b UH |
20 | The ETM capture has been configured without direct branch reporting, |
| 21 | so the .elf file is needed for proper decoding. | |
| 9f58d852 | 22 | |
| f192ae2b | 23 | Note that the source code is not visible in the GUI (and not in objdump output |
| 9f58d852 PA |
24 | either), because it is not included in this repo. You can download it from the |
| 25 | above github link. Due to how gcc stores debug info, you have to put it in this | |
| f192ae2b UH |
26 | path if you want it to show: /home/petteri/projects/Smoothieware. |
| 27 | ||
| 28 | ||
| 29 | Logic analyzer setup | |
| 30 | -------------------- | |
| 31 | ||
| 32 | The logic analyzer used was an FX2 based device (at 12MHz, but see above): | |
| 33 | ||
| 34 | Probe LPC1769 | |
| 35 | ------------------- | |
| 36 | 0 SWO | |
| 37 | 3 ? | |
| 38 | 5 ? | |
| 9f58d852 | 39 |