ESP32 Forum

My setup:
Ubuntu 16.04
ESP-IDF (latest)
openocd-esp32 (latest)
Eclipse (latest)
ESP32 DEVKITC DOIT equivalent
JLINK V9 JTAG clone

I think my openocd is working because I can see below message:

Info : No device selected, using first device.
Info : J-Link V9 compiled Apr 20 2018 16:47:26
Info : Hardware version: 9.40
Info : VTarget = 3.354 V
Info : Reduced speed from 20000 kHz to 15000 kHz (maximum).
Info : Reduced speed from 20000 kHz to 15000 kHz (maximum).
Info : clock speed 20000 kHz
Info : JTAG tap: esp32.cpu0 tap/device found: 0x120034e5 (mfg: 0x272 (Tensilica), part: 0x2003, ver: 0x1)
Info : JTAG tap: esp32.cpu1 tap/device found: 0x120034e5 (mfg: 0x272 (Tensilica), part: 0x2003, ver: 0x1)
Info : esp32: Debug controller was reset (pwrstat=0x5F, after clear 0x0F).
Info : esp32: Core was reset (pwrstat=0x5F, after clear 0x0F).
Info : Detected debug stubs @ 3ffb2b20 on core0 of target 'esp32'
cpu0: Current bits set: BreakIn BreakOut RunStallIn
cpu1: Current bits set: BreakIn BreakOut RunStallIn
Info : esp32: Debug controller was reset (pwrstat=0x5F, after clear 0x0F).
Info : esp32: Core was reset (pwrstat=0x5F, after clear 0x0F).
Info : Detected debug stubs @ 3ffb2b20 on core0 of target 'esp32'

Then I try to debug the hello word example in Eclipse. I have followed ESP-IDF instructions to configure GDB debugger. I get error message when I try to connect GDB to Openocd

Error in final launch sequence:

Failed to execute MI command:
-target-select remote localhost:3333

Error message from debugger back end:
Bogus trace status reply from target: timeout
Failed to execute MI command:
-target-select remote localhost:3333

Error message from debugger back end:
Bogus trace status reply from target: timeout
Bogus trace status reply from target: timeout

On openocd side, these are the log messages:

Info : esp32: Debug controller was reset (pwrstat=0x5F, after clear 0x0F).
Info : esp32: Core was reset (pwrstat=0x5F, after clear 0x0F).
Info : Detected debug stubs @ 3ffb2b20 on core0 of target 'esp32'
Info : accepting 'gdb' connection on tcp/3333
Info : Target halted. PRO_CPU: PC=0x400E0F7A (active) APP_CPU: PC=0x00000000
Info : Not full dbg stub table 1 of 2
Error: timed out while waiting for target halted / 4 - 2
Error: timed out while waiting for target halted / 4 - 2
Error: Faied to wait algorithm (-4)!
jaylink: Failed to receive data from device: LIBUSB_ERROR_TIMEOUT.
Error: timed out while waiting for target halted / 4 - 2
Warn : xtensa_write_memory: esp32: target not halted
Error: failed to restore 28 bytes of working area at address 0x3ffc0590
Warn : xtensa_write_memory: esp32: target not halted
Error: failed to restore 28 bytes of working area at address 0x400916f8
Warn : xtensa_write_memory: esp32: target not halted
Error: failed to restore 1300 bytes of working area at address 0x3ffc007c
Warn : xtensa_write_memory: esp32: target not halted
Error: failed to restore 5880 bytes of working area at address 0x40090000
Warn : xtensa_write_memory: esp32: target not halted
Error: failed to restore 124 bytes of working area at address 0x3ffc0000
Error: Algorithm run faied (-4)!
Error: Faied to run flasher stub (-4)!
Error: Failed to get flash mappings (-4)!
Error: auto_probe failed
Error: Connect failed. Consider setting up a gdb-attach event for the target to prepare target for GDB connect, or use 'gdb_memory_map disable'.
Error: attempted 'gdb' connection rejected
Info : Halt timed out, wake up GDB.
jaylink: Failed to receive data from device: LIBUSB_ERROR_TIMEOUT.

I tried some of instructions to configure GDB for openocd ESP32, but I am not sure where I should place .gdbinit and also not sure have I written the file correctly.

Please help.

Regarding your question, I suggest you make sure that your JTAG and gdb are working correctly in command line mode. At least then you will know that openocd and your jtag are working correctly together.

I'm in a similar situation as you but I have made a bit more progress. I have the debugging working more or less correctly in command line, and also in Eclipse. I followed the Espressif documentation to the letter, and it is really good. However I'm using an ESP32 Wrover Kit which has built-in JTAG so it is easier. I have instructions for Windows if that is any use to you ... actually you can see them here: http://www.irelandupclose.com/customer/esp32/jtag/.