https://github.com/mp-se/esp32s2_coredump
esp32s2 example for how to use the coredump feature
https://github.com/mp-se/esp32s2_coredump
coredump esp32 esp32s2
Last synced: 9 months ago
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esp32s2 example for how to use the coredump feature
- Host: GitHub
- URL: https://github.com/mp-se/esp32s2_coredump
- Owner: mp-se
- Archived: true
- Created: 2023-06-16T21:10:03.000Z (about 3 years ago)
- Default Branch: main
- Last Pushed: 2023-06-16T21:10:05.000Z (about 3 years ago)
- Last Synced: 2024-09-29T18:35:22.168Z (over 1 year ago)
- Topics: coredump, esp32, esp32s2
- Language: C++
- Homepage:
- Size: 2.93 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
This is an example on how to get exception (core dump) data from a crashed ESP32S2. The easy way is to use a debugger but this might happend when you dont have a debugger attached so this is a good way to capture that error in a production environment.
Core dump is enabled by default but there needs to be a core dump partition for it to work as in the below example.
```
# Name,Type,SubType,Offset,Size,Flags
nvs,data,nvs,0x9000,0x5000
otadata,data,ota,0xe000,0x2000
app0,app,ota_0,0x10000,0x1c0000
app1,app,ota_1,0x1d0000,0x1c0000
spiffs,data,spiffs,0x390000,0x60000
coredump,data,coredump,0x3F0000,0x10000
```
Use the PC value to find out the adress where it crashed.
Create a dump of the elf file to see what line of code caused the crash. This path might vary depending on what version you have installed.
```
\packages\toolchain-xtensa-esp32s2\bin\xtensa-esp32s2-elf-objdump.exe -S .\firmware.elf > dump.txt
```
On my device the crash was on adress; 0x40081746 and this points to the line of code that casused it to crash.
```
Serial.println("Crashing....");
40081734: fa4ab1 l32r a11, 4008005c <_stext+0x3c>
40081737: fa3ba1 l32r a10, 40080024 <_stext+0x4>
4008173a: 000f25 call8 4008182c <_ZN5Print7printlnEPKc>
delay(500);
4008173d: f4a1a2 movi a10, 0x1f4
40081740: 0099a5 call8 400820dc
*ptr = 0x10; // Cause crash
40081743: 00a082 movi a8, 0
40081746: 10a092 movi a9, 16
40081749: 004892 s8i a9, a8, 0
```
Happy debugging.