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Merge branch 'bugfix/note_about_main_xtal_frequency_selection' into 'master'

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Getting Started docs: Updated information about setting the main XTAL frequency

See merge request !1645
This commit is contained in:
Ivan Grokhotkov 2017-12-11 15:45:01 +08:00
commit a7a861962d
1 changed files with 12 additions and 8 deletions
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20
docs/get-started/index.rst
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@ -127,10 +127,6 @@ ESP-IDF will be downloaded into ``~/esp/esp-idf``.
cd ~/esp/esp-idf
git submodule update --init
.. note::
While cloning submodules on **Windows** platform, the ``git clone`` command may print some output starting ``': not a valid identifier...``. This is a `known issue <https://github.com/espressif/esp-idf/issues/11>`_ but the git clone still succeeds without any problems.
.. _get-started-setup-path:
@ -206,9 +202,6 @@ Here are couple of tips on navigation and use of ``menuconfig``:
If you are **Arch Linux** user, navigate to ``SDK tool configuration`` and change the name of ``Python 2 interpreter`` from ``python`` to ``python2``.
.. note::
Most ESP32 development boards have a 40MHz crystal installed. However, some boards use a 26MHz crystal. If your board uses a 26MHz crystal, or you get garbage output from serial port after code upload, adjust the :ref:`CONFIG_ESP32_XTAL_FREQ_SEL` option in menuconfig.
.. _get-started-build-flash:
@ -283,7 +276,18 @@ Several lines below, after start up and diagnostic log, you should see "Hello wo
Restarting in 8 seconds...
Restarting in 7 seconds...
To exit monitor use shortcut ``Ctrl+]``. To execute ``make flash`` and ``make monitor`` in one shoot type ``make flash monitor``. Check section :doc:`IDF Monitor <idf-monitor>` for handy shortcuts and more details on using this application.
To exit the monitor use shortcut ``Ctrl+]``.
.. note::
If instead of the messages above, you see a random garbage similar to::
e<><65><EFBFBD>)(Xn@<40>y.!<21><>(<28>PW+)<29><>Hn9a؅/9<>!<21>t5<74><35>P<EFBFBD>~<7E>k<EFBFBD><6B>e<EFBFBD>ea<65>5<EFBFBD>jA
~zY<7A><59>Y(1<>,1<15><> e<><65><EFBFBD>)(Xn@<40>y.!Dr<44>zY(<28>jpi<70>|<7C>+z5Ymvp
or monitor fails shortly after upload, your board is likely using 26MHz crystal, while the ESP-IDF assumes default of 40MHz. Exit the monitor, go back to the :ref:`menuconfig <get-started-configure>`, change :ref:`CONFIG_ESP32_XTAL_FREQ_SEL` to 26MHz, then :ref:`build and flash <get-started-build-flash>` the application again.
To execute ``make flash`` and ``make monitor`` in one go, type ``make flash monitor``. Check section :doc:`IDF Monitor <idf-monitor>` for handy shortcuts and more details on using this application.
That's all what you need to get started with ESP32!