Short hack for using a LTS3401LE seven segment display on the pyboard.

7_segment.py

# main.py -- put your code here!

from pyb import Pin

seven_seg = {'a':'X4',
            'b':'Y11',
            'c':'X6',
            'd':'Y10',
            'e':'X8',
            'f':'Y9',
            'g':'X7',
            'dpl':'X5',
            'dpr':'Y12'}

chars = {'0':['a','b','c','d','e','f'],
         '1':['b','c'],
         '2':['a','b','d','e','g'],
         '3':['a','b','c','d','g'],
         '4':['b','c','f','g'],
         '5':['a','c','d','f','g'],
         '6':['a','b','c','d','e','g'],
         '7':['a','b','c'],
         '8':['a','b','c','d','e','f','g'],
         '9':['a','b','c','d','f','g'],
         'A':['a','b','c','e','f','g'],
         'B':['c','d','e','f','g'],
         'C':['a','d','e','f'],
         'D':['b','c','d','e','g'],
         'E':['a','d','e','f','g'],
         'F':['a','e','f','g'],
         'G':['a','b','c','d','f','g'],
         'H':['c','e','f','g'],
         'I':['e','f'],
         'J':['b','c','d','e'],
         'K':['b','c','e','f','g'],
         'L':['d','e','f'],
         'M':['a','c','e'],
         'N':['c','e','g'],
         'O':['a','b','c','d','e','f'],
         'P':['a','b','e','f','g'],
         'Q':['a','b','c','f','g'],
         'R':['e','g'],
         'S':['a','c','d','f','g'],
         'T':['d','e','f','g'],
         'U':['b','c','d','e','f'],
         'V':['c','d','e'],
         'W':['b','d','f',],
         'X':['b','c','e','f','g'],
         'Y':['b','c','d','f','g'],
         'Z':['a','b','d','e','g'],
         ' ':[],
         'all':seven_seg.keys()}

for led in seven_seg:
    seven_seg[led] = Pin(seven_seg[led],Pin.OUT_PP)
    pyb.delay(50)
    seven_seg[led].high()

def led_on(led):
    seven_seg[led].low()

def led_off(led):
    seven_seg[led].high()

def show_char(char):
    for led in chars['all']:
        led_off(led)
    try:
        for led in chars[char]:
            led_on(led)
    except KeyError:
        pass

def print_text(text,delay=100):
    for char in range(len(text)):
        show_char(text[char])
        pyb.delay(delay)