Scroll_SSD1306.py

#
# Libraries to use the SDL_1306 as a scrollable device for WPA V3
#

import time

import Adafruit_GPIO.SPI as SPI
import Adafruit_SSD1306

from PIL import Image
from PIL import ImageDraw
from PIL import ImageFont

OLEDLines = ["","","","","",""]
width = 128
height = 64 
top = 0
lineheight = 10
currentLine = 0
offset = 0

image = Image.new('1', (width, height))


draw = ImageDraw.Draw(image)
# Load default font.

font = ImageFont.load_default()


def addLineOLED(display, text):

    
    global currentLine, offset, OLEDLines
    # Write line of text.

    # Draw a black filled box to clear the line.
    draw.rectangle((0,lineheight*currentLine, 127, lineheight*(currentLine+1)-1), outline=0, fill=0)
    draw.text((0, lineheight*currentLine),    text,  font=font, fill=255)
    OLEDLines[currentLine] = text 

    if (currentLine == 5):
        for i in range(0,5):
            j = 5 - i -1
            draw.rectangle((0,lineheight*(j), 127, lineheight*(j+1)-1), outline=0, fill=0)
            draw.text((0, lineheight*(j)),    OLEDLines[j],  font=font, fill=255)


    if (currentLine < 5): 
        currentLine = currentLine + 1
    else:
        currentLine = 5
        # rewrite lines 
        for i in range(0,5):
            OLEDLines[i] = OLEDLines[i+1]    
        '''
        for i in range(0,1):
                offset = (offset + 1) % 64
                display.command(0x40 | offset)
                time.sleep(0.01)

        '''

    display.image(image)
    display.display()


def addNumberedLineOLED(display, linenumber, text):

    # write one line of text at linenumber

    draw.rectangle((0,lineheight*currentLine, 127, lineheight*(currentLine+1)-1), outline=0, fill=0)
    draw.text((0, linenumber*lineheight),    text,  font=font, fill=255)

    display.image(image)
    display.display()