126 lines
3.9 KiB
Python
126 lines
3.9 KiB
Python
# Copyright (c) 2014 Adafruit Industries
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# Author: 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 math
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import time
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import Adafruit_GPIO.SPI as SPI
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import Adafruit_SSD1306
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import Image
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import ImageFont
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import ImageDraw
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# Raspberry Pi pin configuration:
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RST = 24
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# Note the following are only used with SPI:
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DC = 23
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SPI_PORT = 0
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SPI_DEVICE = 0
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# Beaglebone Black pin configuration:
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# RST = 'P9_12'
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# Note the following are only used with SPI:
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# DC = 'P9_15'
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# SPI_PORT = 1
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# SPI_DEVICE = 0
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# 128x32 display with hardware I2C:
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disp = Adafruit_SSD1306.SSD1306_128_32(rst=RST)
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# 128x64 display with hardware I2C:
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# disp = Adafruit_SSD1306.SSD1306_128_64(rst=RST)
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# 128x32 display with hardware SPI:
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# disp = Adafruit_SSD1306.SSD1306_128_32(rst=RST, dc=DC, spi=SPI.SpiDev(SPI_PORT, SPI_DEVICE, max_speed_hz=8000000))
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# 128x64 display with hardware SPI:
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# disp = Adafruit_SSD1306.SSD1306_128_64(rst=RST, dc=DC, spi=SPI.SpiDev(SPI_PORT, SPI_DEVICE, max_speed_hz=8000000))
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# Initialize library.
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disp.begin()
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# Get display width and height.
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width = disp.width
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height = disp.height
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# Clear display.
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disp.clear()
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disp.display()
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# Create image buffer.
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# Make sure to create image with mode '1' for 1-bit color.
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image = Image.new('1', (width, height))
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# Load default font.
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font = ImageFont.load_default()
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# Alternatively load a TTF font.
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# Some nice fonts to try: http://www.dafont.com/bitmap.php
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# font = ImageFont.truetype('Minecraftia.ttf', 8)
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# Create drawing object.
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draw = ImageDraw.Draw(image)
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# Define text and get total width.
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text = 'SSD1306 ORGANIC LED DISPLAY. THIS IS AN OLD SCHOOL DEMO SCROLLER!! GREETZ TO: LADYADA & THE ADAFRUIT CREW, TRIXTER, FUTURE CREW, AND FARBRAUSCH'
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maxwidth, unused = draw.textsize(text, font=font)
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# Set animation and sine wave parameters.
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amplitude = height/4
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offset = height/2 - 4
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velocity = -2
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startpos = width
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# Animate text moving in sine wave.
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print 'Press Ctrl-C to quit.'
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pos = startpos
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while True:
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# Clear image buffer by drawing a black filled box.
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draw.rectangle((0,0,width,height), outline=0, fill=0)
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# Enumerate characters and draw them offset vertically based on a sine wave.
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x = pos
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for i, c in enumerate(text):
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# Stop drawing if off the right side of screen.
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if x > width:
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break
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# Calculate width but skip drawing if off the left side of screen.
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if x < -10:
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char_width, char_height = draw.textsize(c, font=font)
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x += char_width
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continue
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# Calculate offset from sine wave.
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y = offset+math.floor(amplitude*math.sin(x/float(width)*2.0*math.pi))
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# Draw text.
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draw.text((x, y), c, font=font, fill=255)
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# Increment x position based on chacacter width.
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char_width, char_height = draw.textsize(c, font=font)
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x += char_width
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# Draw the image buffer.
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disp.image(image)
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disp.display()
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# Move position for next frame.
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pos += velocity
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# Start over if text has scrolled completely off left side of screen.
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if pos < -maxwidth:
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pos = startpos
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# Pause briefly before drawing next frame.
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time.sleep(0.1)
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