fix some errors

sunfounder · Sep 29, 2022 · 95f50dd · 95f50dd
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diff --git a/.vscode/settings.json b/.vscode/settings.json
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+{
+    "esbonio.sphinx.confDir": ""
+}
diff --git a/docs/source/appendix.rst b/docs/source/appendix.rst
diff --git a/docs/source/appendix/appendix.rst b/docs/source/appendix/appendix.rst
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+Appendix
+==============
+
+.. toctree::
+    :maxdepth: 2
+
+    i2c_configuration
+    spi_configuration
+    remote_desktop
diff --git a/docs/source/appendix/i2c_configuration.rst b/docs/source/appendix/i2c_configuration.rst
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+.. _i2c_config:
+
+I2C Configuration
+-----------------------
+
+**Step 1**: Enable the I2C port of your Raspberry Pi (If you have
+enabled it, skip this; if you do not know whether you have done that or
+not, please continue).
+
+.. raw:: html
+
+    <run></run>
+
+.. code-block:: 
+
+    sudo raspi-config
+
+**3 Interfacing options**
+
+.. image:: media/image282.png
+    :align: center
+
+**P5 I2C**
+
+.. image:: media/image283.png
+    :align: center
+
+**<Yes>, then <Ok> -> <Finish>**
+
+.. image:: media/image284.png
+    :align: center
+
+**Step 2:** Check whether the i2c modules are loaded and active.
+
+.. raw:: html
+
+    <run></run>
+
+.. code-block:: 
+
+    lsmod | grep i2c
+
+Then the following codes will appear (the number may be different).
+
+.. code-block:: 
+
+    i2c_dev                     6276    0
+    i2c_bcm2708                 4121    0
+
+**Step 3:** Install i2c-tools.
+
+.. raw:: html
+
+    <run></run>
+
+.. code-block:: 
+
+    sudo apt-get install i2c-tools
+
+**Step 4:** Check the address of the I2C device.
+
+.. raw:: html
+
+    <run></run>
+
+.. code-block:: 
+
+    i2cdetect -y 1      # For Raspberry Pi 2 and higher version
+
+.. raw:: html
+
+   <run></run>
+
+.. code-block:: 
+
+    i2cdetect -y 0      # For Raspberry Pi 1
+
+
+.. code-block:: 
+
+    pi@raspberrypi ~ $ i2cdetect -y 1
+        0  1  2  3   4  5  6  7  8  9   a  b  c  d  e  f
+    00:           -- -- -- -- -- -- -- -- -- -- -- -- --
+    10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
+    20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
+    30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
+    40: -- -- -- -- -- -- -- -- 48 -- -- -- -- -- -- --
+    50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
+    60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
+    70: -- -- -- -- -- -- -- --
+
+If there is an I2C device connected, the address of the device will be displayed.
+
+**Step 5:**
+
+**For C language users:** Install libi2c-dev.
+
+.. raw:: html
+
+    <run></run>
+
+.. code-block:: 
+
+    sudo apt-get install libi2c-dev 
+
+**For Python users:** Install smbus for I2C.
+
+.. raw:: html
+
+    <run></run>
+
+.. code-block:: 
+
+    sudo pip3 install smbus2
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