I am trying to use the builtin JTAG serial to debug my ESP32S3 project. The issue I am facing is the debugger does not stop at setup when starting debugging.
Once the project is running I need to interrupt it, clear all breakpoints (in spite of none being set), then I can set a breakpoint, continue the project, then the breakpoint is hit.
This is my INI file:
platform = espressif32
board = um_tinys3
framework = arduino
build_type = debug
build_flags =
'-D ARDUINO_USB_MODE=1'
'-D ARDUINO_USB_CDC_ON_BOOT=1'
debug_tool = esp-builtin
debug_init_break = break setup
upload_port = COM3
upload_speed = 115200
; upload_protocol = espota
; upload_port = 10.0.0.100
; monitor_port = COM3
monitor_speed = 460800
lib_deps = contrem/arduino-timer @ ^3.0.1
ArduinoOta
This makes debugging slower than the already slow builtin JTAG.
If you don’t have a “setup” function declared, you should see an error (i.e. Function “setup” not defined) while monitoring the debug console.
I am using the esp-idf framework with PlatformIO and VS-Code, and my .ini configuration is similar to yours. However, in my case, I have it set to break when it hits the ‘app_main’ function. See screenshots.
;build in debug mode instead of release mode
build_type = debug
; serial upload options
upload_speed = 2000000 ;ESP32-S3 USB-Serial Converter maximum 2000000bps
upload_port = COM3
; serial monitor options
monitor_speed = 115200
monitor_port = COM10
; debugging options
debug_init_break = break app_main
debug_tool = esp-builtin
It is slow as molasses but you get used to it. 
Thank you.
I do have setup defined and in the debug view I see:
PlatformIO: Resume the execution to `debug_init_break = break setup`
However, it doesn’t stop there.
