42d7e283d2
This error may occur when busnum is incorrect: "IOError: [Errno 16] Device or resource busy" Refer to this Adafruit Forum issue for more information "LED Backpack not working on beaglebone black with debian" https://forums.adafruit.com/viewtopic.php?f=49&t=140344 Signed-off-by: Drew Fustini <drew@pdp7.com>
81 lines
2.8 KiB
Python
81 lines
2.8 KiB
Python
# Copyright (c) 2014 Adafruit Industries
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# Author: Carter Nelson
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# Modified from matrix8x8_test.py by Tony DiCola
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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import time
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from PIL import Image
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from PIL import ImageDraw
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from Adafruit_LED_Backpack import Matrix8x16
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# Create display instance on default I2C address (0x70) and bus number.
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display = Matrix8x16.Matrix8x16()
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# Alternatively, create a display with a specific I2C address and/or bus.
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# display = Matrix8x16.Matrix8x16(address=0x74, busnum=1)
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# On BeagleBone, try busnum=2 if IOError occurs with busnum=1
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# display = Matrix8x16.Matrix8x16(address=0x74, busnum=2)
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# Initialize the display. Must be called once before using the display.
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display.begin()
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# Run through each pixel individually and turn it on.
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for x in range(8):
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for y in range(16):
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# Clear the display buffer.
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display.clear()
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# Set pixel at position i, j to on. To turn off a pixel set
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# the last parameter to 0.
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display.set_pixel(x, y, 1)
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# Write the display buffer to the hardware. This must be called to
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# update the actual display LEDs.
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display.write_display()
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# Delay for half a second.
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time.sleep(0.1)
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# Draw some shapes using the Python Imaging Library.
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# Clear the display buffer.
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display.clear()
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# First create an 8x16 1 bit color image.
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image = Image.new('1', (8, 16))
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# Then create a draw instance.
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draw = ImageDraw.Draw(image)
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# Draw a rectangle with colored outline
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draw.rectangle((0,0,7,15), outline=255, fill=0)
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# Draw an X with two lines.
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draw.line((1,1,6,14), fill=255)
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draw.line((1,14,6,1), fill=255)
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# Draw the image on the display buffer.
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display.set_image(image)
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# Draw the buffer to the display hardware.
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display.write_display()
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# See the SSD1306 library for more examples of using the Python Imaging Library
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# such as drawing text: https://github.com/adafruit/Adafruit_Python_SSD1306
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