ESP32 Variable Watch during Debugging

[aaquilina]

Hi,

I am debugging the ESP32-WROOM-32 using a USB to MPSEE Serial Cable over the JTAG interface. When setting up the debug settings, under programming interface, I select to specify and interface script manually and for this I selected interface/ftdi/um232h.cfg.

Once I created the project, I copied over the HTTP Client example from the ESP-IDF. I then run the code and manage to break at my breakpoint. When break occurs and I mouse over a variable, and the value is listed as <unavailable>. Is this normal for the ESP32? Or is this caused by the USB to JTAG converter that I’m using? If it’s the latter, would I be better off with an Olimex debugger such as the ARM-USB-OCD-H?

 

[support]

Hi,

This is a known limitation of the ESP32 toolchain. To work around this, please wrap your function call with another one, e.g.:

void ThreadBodyWrapper()
{
    ThreadBody();
}

As long as the esp32 gdb can see the previous frame (ThreadBodyWrapper), it will be able to show the variable values in the current frame (ThreadBody).

[Author]

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