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Add information on compatibility issue between JTAG and AT firmware.

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Kirill Chalov 2019-11-20 15:01:56 +08:00 committed by Krzysztof Budzynski
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commit 1d06b6b07e
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1
docs/en/api-guides/jtag-debugging/index.rst
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@ -287,6 +287,7 @@ This section provides collection of links to all tips and quirks referred to fro
* :ref:`jtag-debugging-tip-openocd-configure-target` * :ref:`jtag-debugging-tip-openocd-configure-target`
* :ref:`jtag-debugging-tip-reset-by-debugger` * :ref:`jtag-debugging-tip-reset-by-debugger`
* :ref:`jtag-debugging-tip-jtag-pins-reconfigured` * :ref:`jtag-debugging-tip-jtag-pins-reconfigured`
* :ref:`jtag-debugging-tip-at-firmware-issue`
* :ref:`jtag-debugging-tip-reporting-issues` * :ref:`jtag-debugging-tip-reporting-issues`

10
docs/en/api-guides/jtag-debugging/tips-and-quirks.rst
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@ -235,6 +235,16 @@ Below is an excerpt from series of errors reported by GDB after the application
cpu1: xtensa_resume (line 431): DSR (FFFFFFFF) indicates DIR instruction generated an overrun! cpu1: xtensa_resume (line 431): DSR (FFFFFFFF) indicates DIR instruction generated an overrun!
.. _jtag-debugging-tip-at-firmware-issue:
JTAG and ESP32-WROOM-32 AT firmware Compatibility Issue
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
The ESP32-WROOM series of modules come pre-flashed with AT firmware. This firmware configures the pins GPIO12 to GPIO15 as SPI slave interface, which makes using JTAG impossible.
To make JTAG available, build new firmware that is not using pins GPIO12 to GPIO15 dedicated to JTAG communication. After that, flash the firmware onto your module. See also :ref:`jtag-debugging-tip-jtag-pins-reconfigured`.
.. _jtag-debugging-tip-reporting-issues: .. _jtag-debugging-tip-reporting-issues:
Reporting issues with OpenOCD / GDB Reporting issues with OpenOCD / GDB