# orangepi_zero2_i2c_ssd1306 **Repository Path**: Kozakemi/orangepi_zero2_i2c_ssd1306 ## Basic Information - **Project Name**: orangepi_zero2_i2c_ssd1306 - **Description**: 修改自https://github.com/xtile/orange_pi-ssd1306_oled 适配orangepi zero 2 - **Primary Language**: Python - **License**: MIT - **Default Branch**: master - **Homepage**: None - **GVP Project**: No ## Statistics - **Stars**: 0 - **Forks**: 1 - **Created**: 2023-04-09 - **Last Updated**: 2025-03-14 ## Categories & Tags **Categories**: Uncategorized **Tags**: None ## README OrangePi 2 SSD1306 / SH1106 OLED Driver ============================ Interfacing OLED matrix displays with the SSD1306 (or SH1106) driver in Python 2 or 3 using I2C on the OrangePi 2. The particular kit I bought can be acquired for a few dollars from `Banggood `_. Further technical details for the SSD1306 OLED display can be found in the `datasheet `_ [PDF]. See also the `datasheet `_ [PDF] for the SH1106 chipset. The SSD1306 display is 128x64 pixels, and the board is `tiny`, and will fit neatly inside the RPi case (the SH1106 is slightly different, in that it supports 132 x 64 pixels). .. image:: https://raw.githubusercontent.com/nukem/ssd1306/master/doc/IMG_20161012_011420.jpg :alt: GPIOS GPIO pin-outs ------------- The SSD1306 device is an I2C device, so connecting to the Orange Pi 2 is very straightforward: P1 Header --------- .. image:: https://raw.githubusercontent.com/nukem/ssd1306/master/doc/68747470733a2f2f692e69696e666f2e637a2f696d616765732f3339392f6f72616e67652d70692d706c75732d352e706e67.png :alt: GPIOS For prototyping, the P1 header pins should be connected as follows: ========== ====== ============ ======== ============== ======== Board Pin Name Remarks OPi2 Pin OPi2 Function Colour ---------- ------ ------------ -------- -------------- -------- 1 VCC +3.3V Power P01-1 3V3 Orange 3 SDA Data PA12-3 GPIO 2 (SDA) Blue 5 SCL Clock PA11-5 GPIO 3 (SCL) Blue 8 GND Ground P01-6 GND Black ========== ====== ============ ======== ============== ======== Pre-requisites -------------- This was tested with OrangePi 2 with kernel 3.4.39 Fedora distribution. Ensure that the I2C kernel module is loaded:: $ lsmod Module Size Used by i2c_algo_bit 5461 0 gpio_sunxi 8233 0 8189es 887631 0 If you have no kernel modules listed and nothing is showing using ``dmesg`` then this implies the kernel I2C driver is not loaded. Enable the I2C as follows: #. create a file ``vim /etc/modules-load.d/i2c.conf`` #. with content ``i2c-algo-bit`` This will auto load the i2c kernel module on bootup You can also manually install the module ``modprobe i2c-algo-bit`` Then reboot. Then add your user to the i2c group:: $ sudo adduser pi i2c Install some packages (python2):: $ sudo apt-get install i2c-tools python-smbus python-pip $ sudo pip install pillow or (python3):: $ sudo apt-get install i2c-tools python3-smbus python3-pip $ sudo pip3 install pillow Next check that the device is communicating properly (if using a rev.1 board, use 0 for the bus not 1):: $ i2cdetect -y 1 0 1 2 3 4 5 6 7 8 9 a b c d e f 00: -- -- -- -- -- -- -- -- -- -- -- -- -- 10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 30: -- -- -- -- -- -- -- -- -- -- -- UU 3c -- -- -- 40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 70: -- -- -- -- -- -- -- -- According to the manual, "UU" means that probing was skipped, because the address was in use by a driver. It suggest that there is a chip at that address. Indeed the documentation for the device indicates it uses two addresses. Installing the Python Package ----------------------------- Python smbus is needed to run this so its easier to use Python 2 Unless you want to compile smbus for Python 3 ``dnf install i2c-tools-python`` This includes Python smbus for Python 2 ``dnf install python-devel`` Clone the repository to have a local copy ``git clone`` ``cd ssd1306`` For python2, from the bash prompt, enter:: $ sudo python setup.py install This will install the Python files in ``/usr/local/lib/python2.7`` making them ready for use in other programs. Alternatively for python3, type:: $ sudo python3 setup.py install Software Display Driver ----------------------- The screen can be driven with python using the ``oled/device.py`` script. There are two device classes and usage is very simple if you have ever used `Pillow `_ or PIL. First, import and initialise the device: .. code:: python from oled.device import ssd1306, sh1106 from oled.render import canvas from PIL import ImageFont, ImageDraw # substitute sh1106(...) below if using that device device = ssd1306(port=1, address=0x3C) # rev.1 users set port=0 The display device should now be configured for use. The specific ``ssd1306`` or ``sh1106`` classes both expose a ``display()`` method which takes a 1-bit depth image. However, for most cases, for drawing text and graphics primitives, the canvas class should be used as follows: .. code:: python with canvas(device) as draw: font = ImageFont.load_default() draw.rectangle((0, 0, device.width, device.height), outline=0, fill=0) draw.text((30, 40), "Hello World", font=font, fill=255) The ``canvas`` class automatically creates an `ImageDraw `_ object of the correct dimensions and bit depth suitable for the device, so you may then call the usual Pillow methods to draw onto the canvas. As soon as the with scope is ended, the resultant image is automatically flushed to the device's display memory and the ImageDraw object is garbage collected. Run the demos in the example directory:: $ python examples/demo.py $ python examples/sys_info.py $ python examples/pi_logo.py $ python examples/maze.py Notes ----- #. Substitute ``python3`` for ``python`` in the above examples if you are using python3. #. ``python-dev`` (apt-get) and ``psutil`` (pip/pip3) are required to run the ``sys_info.py`` example. See `install instructions `_ for the exact commands to use. References ---------- - https://learn.adafruit.com/monochrome-oled-breakouts - https://github.com/adafruit/Adafruit_Python_SSD1306 - http://www.dafont.com/bitmap.php - http://raspberrypi.znix.com/hipidocs/topic_i2cbus_2.htm - http://martin-jones.com/2013/08/20/how-to-get-the-second-raspberry-pi-i2c-bus-to-work/ License ------- The MIT License (MIT) Copyright (c) 2016 Richard Hull Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.