8x7-segments Display TM1638

Assembly

The connection of the display is set the following way :
You can find the connection information on the back of the card.

Usage

At first, it is necessary to include libraries :

# Libraries include
import tm1638
from machine import Pin

Next we initialise communication pins with the card :

# Card declaration
tm = tm1638.TM1638(stb=Pin('D2'), clk=Pin('D3'), dio=Pin('D4'))

Now the card is ready to be used and here are the instructions to use the different parts :

• LEDs :
  tm.leds(value) : turn on/off leds depending on the value
  tm.led(position, value) : turn on/off led at selected position

# LEDs
tm.leds(0b01010101) # turn on 1 led every 2
tm.leds(0b00000001) # turn on the 1st led and turn off the others
tm.led(2, 0)	# turn off the 3rd led
tm.led(0,1) 	# turn on the 1st led

• Buttons :
  tm.keys() return a 8-bits word with 1 to indicate the button is pressed. e.g. if tm.keys() return 0b00100001, that means that the 1st and 6th buttons are pressed.

# Get information on the buttons
boutons = tm.keys()

• Segments :
  tm.show('word') : allow to write caracters 0-9, A-Z, space, -, ° (displayed using ‘*’) and dots. Display is left aligned and doesn’t erase what was previously written if the word is shorter than 8 caracters.
  tm.number(number) : allow to write an integer. Display is right aligned and erases non-filled cases.
  tm.scroll('message', time) : allow to write a message moving from right to left. “time” is optional and allow to change the scrolling speed.

# Segments
tm.show('  *--*  ')
tm.show('a.b.c.d.e.f.g.h.')

tm.number(-1234567)
tm.number(1234)

tm.scroll('Hello World')
tm.scroll('Hello World Hello World', 100)

• Brightness adjustment :
  It is possible to change the leds and segments brightness with tm.brightness(0) or to turn them off with tm.clear().

# Modify leds and segments brightness to the minimum
tm.brightness(0)

# Turn off leds and segments
tm.clear()

La Bibliothèque TM1638