# Copyright (c) 2014 Adafruit Industries # Author: Tony DiCola # # 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. import sys import select import math import time import os # import Adafruit_GPIO.SPI as SPI import Adafruit_SSD1306 from PIL import Image from PIL import ImageFont from PIL import ImageDraw os.chdir(os.path.dirname(os.path.realpath(__file__))) # Raspberry Pi pin configuration: RST = 24 # Note the following are only used with SPI: DC = 23 SPI_PORT = 0 SPI_DEVICE = 0 # Beaglebone Black pin configuration: # RST = 'P9_12' # Note the following are only used with SPI: # DC = 'P9_15' # SPI_PORT = 1 # SPI_DEVICE = 0 # 128x32 display with hardware I2C: # disp = Adafruit_SSD1306.SSD1306_128_32(rst=RST) # 128x64 display with hardware I2C: disp = Adafruit_SSD1306.SSD1306_128_64(rst=RST) # 128x32 display with hardware SPI: # disp = Adafruit_SSD1306.SSD1306_128_32(rst=RST, dc=DC, spi=SPI.SpiDev(SPI_PORT, SPI_DEVICE, max_speed_hz=8000000)) # 128x64 display with hardware SPI: # disp = Adafruit_SSD1306.SSD1306_128_64(rst=RST, dc=DC, spi=SPI.SpiDev(SPI_PORT, SPI_DEVICE, max_speed_hz=8000000)) # 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('VCR_OSD_MONO_1.001.ttf', 18) # Create drawing object. draw = ImageDraw.Draw(image) # Define text and get total width. firstLine = '' secondLine = '' thirdLine = '' lineHeight = 18 interline = 4 # Animate text moving in sine wave. firstPos = 0 secondPos = 0 thirdPos = 0 firstScroll = 'A' secondScroll = 'A' thirdScroll = 'A' print('READY') while True: while sys.stdin in select.select([sys.stdin], [], [], 0)[0]: line = sys.stdin.readline() if line: print('FREE') sys.stdout.flush() if line[0] == '1': firstScroll = line[1] firstPos=0 firstLine = line[2:len(line)] if line[0] == '2': secondScroll = line[1] secondPos=0 secondLine = line[2:len(line)] if line[0] == '3': thirdScroll = line[1] thirdPos=0 thirdLine = line[2:len(line)] else: # an empty line means stdin has been closed print('closed from python') exit(0) else: sys.stdout.flush() # 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. maxwidth, unused = draw.textsize(firstLine, font=font) x = firstPos for i, c in enumerate(firstLine): # 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 # Draw text. draw.text((x, 0), c, font=font, fill=255) # Increment x position based on chacacter width. char_width, char_height = draw.textsize(c, font=font) x += char_width if firstPos < -maxwidth: firstPos = width maxwidth, unused = draw.textsize(secondLine, font=font) x = secondPos for i, c in enumerate(secondLine): # 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 # Draw text. draw.text((x, lineHeight+interline), c, font=font, fill=255) # Increment x position based on chacacter width. char_width, char_height = draw.textsize(c, font=font) x += char_width if secondPos < -maxwidth: secondPos = width maxwidth, unused = draw.textsize(thirdLine, font=font) x = thirdPos for i, c in enumerate(thirdLine): # 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 # Draw text. draw.text((x, lineHeight*2+interline*2), c, font=font, fill=255) # Increment x position based on chacacter width. if thirdPos < -maxwidth: thirdPos = width char_width, char_height = draw.textsize(c, font=font) x += char_width # Draw the image buffer. if len(firstLine)>0 or len(secondLine)>0 or len(thirdLine)>0: disp.image(image) disp.display() # Move position for next frame. # print(width) if firstScroll == '1' or (firstScroll == 'A' and draw.textsize(firstLine, font=font)[0] > width): firstPos += -2 if secondScroll == '1' or (secondScroll == 'A' and draw.textsize(secondLine, font=font)[0] > width): secondPos += -2 if thirdScroll == '1' or (thirdScroll == 'A' and draw.textsize(thirdLine, font=font)[0] > width): thirdPos += -2 # Pause briefly before drawing next frame. time.sleep(0.001)