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Documentation/esp32c3: Explain debugging with OpenOCD.

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Signed-off-by: Abdelatif Guettouche <abdelatif.guettouche@espressif.com>
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Abdelatif Guettouche 2021-05-12 10:40:36 +01:00 committed by Xiang Xiao
parent df7bd125f8
commit 5bd970df4f
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29
Documentation/platforms/risc-v/esp32c3/index.rst
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@ -67,6 +67,35 @@ Note that this step is required only one time. Once the bootloader and partitio
table are flashed, we don't need to flash them again. So subsequent builds
would just require: ``make download ESPTOOL_PORT=/dev/ttyUSBXX``
Debugging with OpenOCD
======================
Download and build OpenOCD from Espressif, that can be found in
https://github.com/espressif/openocd-esp32
If you have an ESP32-C3 ECO3, no external JTAG is required to debug, the ESP32-C3
integrates a USB-to-JTAG adapter.
OpenOCD can then be used::
openocd -c 'set ESP_RTOS none' -f board/esp32c3_builtin.cfg
For versions prior to ESP32-C3 ECO3, an external JTAG adapter is needed.
It can be connected as follows::
TMS -> GPIO4
TDI -> GPIO5
TCK -> GPIO6
TDO -> GPIO7
Furthermore, an efuse needs to be burnt to be able to debug::
espefuse.py -p <port> burn_efuse DIS_USB_JTAG
OpenOCD can then be used::
openocd -c 'set ESP_RTOS none' -f board/esp32c3-ftdi.cfg
Peripheral Support
==================