Failed to get flash maps - esp32c3-mini-1 (OCD-574)

[Ardelean-Calin]

Development Kit

No development kit - custom board

Module or chip used

ESP32C3-Mini-1 (Rev 3) with 4MB Flash

Debug Adapter

Integrated USB-JTAG

OpenOCD version

v0.11.0-esp32-20220411

Operating System

Linux

Using an IDE ?

No

OpenOCD command line

openocd -f board/esp32c3-builtin.cfg -c "program_esp build/blink.bin 0x10000 verify exit"

JTAG Clock Speed

default

ESP-IDF version

ESP-IDF v5.0-dev-3485-g20f5e180ee

Problem Description

Using the ESP32-C3-MINI-1 module on a custom board. The integrated JTAG + UART interface (via USB) is detected by my operating system, however I cannot debug any application via openocd, not even the blinky example attached here.

I can successfully flash the device using esptool.py, but when I try to flash via OpenOCD I get:

[calin@compilebox blink]$ openocd -f board/esp32c3-builtin.cfg -c "program_esp build/blink.bin 0x10000 verify exit"
Open On-Chip Debugger  v0.11.0-esp32-20220411 (2022-04-11-08:47)
Licensed under GNU GPL v2
For bug reports, read
    http://openocd.org/doc/doxygen/bugs.html
Info : only one transport option; autoselect 'jtag'
Info : esp_usb_jtag: VID set to 0x303a and PID to 0x1001
Info : esp_usb_jtag: capabilities descriptor set to 0x2000
Warn : Transport "jtag" was already selected
Info : esp_usb_jtag: serial (84:F7:03:67:B5:A8)
Info : esp_usb_jtag: Device found. Base speed 40000KHz, div range 1 to 255
Info : clock speed 40000 kHz
Info : JTAG tap: esp32c3.cpu tap/device found: 0x00005c25 (mfg: 0x612 (Espressif Systems), part: 0x0005, ver: 0x0)
Info : datacount=2 progbufsize=16
Info : Examined RISC-V core; found 1 harts
Info :  hart 0: XLEN=32, misa=0x40101104
Info : starting gdb server for esp32c3 on 3333
Info : Listening on port 3333 for gdb connections
Info : JTAG tap: esp32c3.cpu tap/device found: 0x00005c25 (mfg: 0x612 (Espressif Systems), part: 0x0005, ver: 0x0)
Info : [esp32c3] Found 8 triggers
Error: Failed to get flash maps (4294967295)!
Warn : Failed to get flash mappings (-4)!
Error: Failed to get flash size!
Error: Failed to get flash size!
Error: Failed to probe flash, size 0 KB
Error: auto_probe failed
Error: Failed to find bank 'esp32c3.flash'!

The same error happens if I run openocd -f board/esp32c3-builtin.cfg

and then try to connect via gdb in another terminal riscv32-esp-elf-gdb -ex "target extended-remote :3333"

There seems to be some problem with openocd getting the flash maps for the ESP32­-C3-­MINI-­1 module.

I have tried compiling openocd from sources and running it via a debugger, but I can't seem to be able to debug the stub_flasher.c file and the culprit seems to be there in the stub_flash_get_map() function. Any help on how to debug that function so that I can get more details would be highly appreciated!

I have attached the log from the following command: openocd -d3 -l openocd.log -f board/esp32c3-builtin.cfg -c "program_esp build/blink.bin 0x10000 verify exit"

Log: openocd.log Binary files: blink.zip

Debug Logs

I have attached the logs as attachment so as to not flood this issue with a super long text.

Expected behavior

I would expect to get a list of flash mappings and a successful connection via gdb.

Screenshots

No response

[erhankur]

I tried with the latest OpenOCD master and your idf branch. Also with your binary file. There is no issue on my side. Tested ESp32c3-MINI-1 from the usb jtag port. 

Your commands also look correct.

I could ask to disable memory protection, but during the programming , OpenOCD first resets the chip and protection will be disabled. 

If you need to debug the target without programming it, you can disable  flash support by setting ESP_FLASH_SIZE to 0.

I will turn back if I have something new in my mind to try.

[Ardelean-Calin]

Thank you for trying on your end, as well! If you say that on your end everything works as expected, then the problem might be with the ESP32C3 Mini Module I got from my parts supplier (JLCPCB) or worst case with my hardware design (even though I have just a simple two wire connection to the Data+ and Data- USB lines as seen in the picture below). I am assuming the hardware connection is ok, since I can upload the image via UART & openocd doesn't work even if I set adapter speed 40 in esp_usb_jtag.cfg.

I can try and offer more information regarding the module found on my board, for example, this is the output of esptool.py get_security_info:

[Ardelean-Calin]

Sorry for the spam, I just wanted to attach the output of espefuse.py summary, as well. Maybe it helps... fuses.txt

[erhankur]

@Ardelean-Calin did you add 1K5 resistor between D+ and 3V3. I couldn't see from the picture.

[erhankur]

Closing due to inactivity. if you have still an issue feel free to re-open.