Exception output over USB with ESP32 S3?
Exception output over USB with ESP32 S3?
Related to my previous open question about the ee.vld.128.ip instruction failing viewtopic.php?f=2&t=30121 instruction failing, how do I get the ESP32 S3 to dump out exception information over the USB interface? On the project I'm working on I would much prefer to not have to have a UART interface as well as USB due to size constraints. Is there a way to have exception information printed out the USB interface either instead of or along with the UART interface?
Re: Exception output over USB with ESP32 S3?
The answer might depend on whether you are using IDF or Arduino.
In IDF, console output and panic handler messages are printed both to UART and USB_SERIAL_JTAG by default. You can change this in menuconfig if desired.
In Arduino the default Serial destination it is configured by one of the options in Tools menu.
In IDF, console output and panic handler messages are printed both to UART and USB_SERIAL_JTAG by default. You can change this in menuconfig if desired.
In Arduino the default Serial destination it is configured by one of the options in Tools menu.
Re: Exception output over USB with ESP32 S3?
In my case, I am using the Arduino environment. There does not appear to be any setting that controls this there. I can see other print statements without any issues, only the exception information only appears to go to the UART interface.
Re: Exception output over USB with ESP32 S3?
I was using an old version of ESP32 Arduino without realizing it. This manifested in missing backtrace info — Serial output and task watchdog messages displayed fine over USB-CDC.
Newer versions (esp32-arduino 2.0.7+ / esp-idf 4.4.4) print to USB serial by default (assuming you see any output at all). I tested with this sketch:
For the reference, the panic handler code is here, and esp32-arduino wraps it, but doesn't override.
Newer versions (esp32-arduino 2.0.7+ / esp-idf 4.4.4) print to USB serial by default (assuming you see any output at all). I tested with this sketch:
Code: Select all
void setup()
{
Serial.begin(115200);
Serial.println("Let's provoke the s/w wdt firing...");
sleep(5);
int *x = 0;
*x = 5;
Serial.println("This line will not ever print out");
}
void loop(){}
Code: Select all
Guru Meditation Error: Core 0 panic'ed (StoreProhibited). Exception was unhandled.
Core 0 register dump:
PC : 0x42002a73 PS : 0x00060830 A0 : 0x82003fa5 A1 : 0x3fcebd70
A2 : 0x00000000 A3 : 0x00000000 A4 : 0x00000000 A5 : 0x00000000
A6 : 0x3fcebf04 A7 : 0x80000001 A8 : 0x82002a70 A9 : 0x3fcebd50
A10 : 0x00000000 A11 : 0x00000004 A12 : 0x0007ffff A13 : 0x80000000
A14 : 0x02c93da0 A15 : 0x00ffffff SAR : 0x00000010 EXCCAUSE: 0x0000001d
EXCVADDR: 0x00000000 LBEG : 0x40056f5c LEND : 0x40056f72 LCOUNT : 0xffffffff
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