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Pioneer600_code/OLED/python/animate.py

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+# Copyright (c) 2015 WaveShare
+# Author: My MX
+import math
+import time
+
+import spidev as SPI
+import SSD1306
+
+from PIL import Image
+from PIL import ImageFont
+from PIL import ImageDraw
+
+
+# Raspberry Pi pin configuration:
+RST = 19
+DC = 16
+bus = 0
+device = 0
+
+# 128x32 display with hardware SPI:
+disp = SSD1306.SSD1306(rst=RST,dc=DC,spi=SPI.SpiDev(bus,device))
+
+# Initialize library.
+disp.begin()
+
+# Get display width and height.
+width = disp.width
+height = disp.height
+
+# Clear display.
+disp.clear()
+disp.display()
+
+# Create image buffer.
+# Make sure to create image with mode '1' for 1-bit color.
+image = Image.new('1', (width, height))
+
+# Load default font.
+font = ImageFont.load_default()
+
+# Alternatively load a TTF font.  Make sure the .ttf font file is in the same directory as this python script!
+# Some nice fonts to try: http://www.dafont.com/bitmap.php
+# font = ImageFont.truetype('Minecraftia.ttf', 8)
+
+# Create drawing object.
+draw = ImageDraw.Draw(image)
+
+# Define text and get total width.
+text = 'SSD1306 ORGANIC LED DISPLAY. THIS IS AN OLD SCHOOL DEMO SCROLLER!! GREETZ TO: LADYADA & THE ADAFRUIT CREW, TRIXTER, FUTURE CREW, AND FARBRAUSCH'
+maxwidth, unused = draw.textsize(text, font=font)
+
+# Set animation and sine wave parameters.
+amplitude = height/4
+offset = height/2 - 4
+velocity = -2
+startpos = width
+
+# Animate text moving in sine wave.
+print("Press Ctrl-C to quit.")
+pos = startpos
+while True:
+	# Clear image buffer by drawing a black filled box.
+	draw.rectangle((0,0,width,height), outline=0, fill=0)
+	# Enumerate characters and draw them offset vertically based on a sine wave.
+	x = pos
+	for i, c in enumerate(text):
+		# Stop drawing if off the right side of screen.
+		if x > width:
+			break
+		# Calculate width but skip drawing if off the left side of screen.
+		if x < -10:
+			char_width, char_height = draw.textsize(c, font=font)
+			x += char_width
+			continue
+		# Calculate offset from sine wave.
+		y = offset+math.floor(amplitude*math.sin(x/float(width)*2.0*math.pi))
+		# Draw text.
+		draw.text((x, y), c, font=font, fill=255)
+		# Increment x position based on chacacter width.
+		char_width, char_height = draw.textsize(c, font=font)
+		x += char_width
+	# Draw the image buffer.
+	disp.image(image)
+	disp.display()
+	# Move position for next frame.
+	pos += velocity
+	# Start over if text has scrolled completely off left side of screen.
+	if pos < -maxwidth:
+		pos = startpos
+	# Pause briefly before drawing next frame.
+	time.sleep(0.1)