Simple test

Ensure your device works with this simple test.

examples/displayio_dial_simpletest.py
 1# SPDX-FileCopyrightText: 2021 Kevin Matocha
 2#
 3# SPDX-License-Identifier: MIT
 4#############################
 5"""
 6This is a basic demonstration of a Dial widget.
 7"""
 8
 9import time
10import board
11import displayio
12import terminalio
13from displayio_dial import Dial
14
15# Fonts used for the Dial tick labels
16tick_font = terminalio.FONT
17
18display = board.DISPLAY  # create the display on the PyPortal or Clue (for example)
19# otherwise change this to setup the display
20# for display chip driver and pinout you have (e.g. ILI9341)
21
22
23# Define the minimum and maximum values for the dial
24minimum_value = 0
25maximum_value = 100
26
27# Create a Dial widget
28my_dial = Dial(
29    x=20,  # set x-position of the dial inside of my_group
30    y=20,  # set y-position of the dial inside of my_group
31    width=180,  # requested width of the dial
32    height=180,  # requested height of the dial
33    padding=25,  # add 25 pixels around the dial to make room for labels
34    start_angle=-120,  # left angle position at -120 degrees
35    sweep_angle=240,  # total sweep angle of 240 degrees
36    min_value=minimum_value,  # set the minimum value shown on the dial
37    max_value=maximum_value,  # set the maximum value shown on the dial
38    tick_label_font=tick_font,  # the font used for the tick labels
39    tick_label_scale=2.0,  # the scale factor for the tick label font
40)
41
42my_group = displayio.Group()
43my_group.append(my_dial)
44
45display.show(my_group)  # add high level Group to the display
46
47step_size = 1
48
49while True:
50
51    # run the dial from minimum to maximum
52    for this_value in range(minimum_value, maximum_value + 1, step_size):
53        my_dial.value = this_value
54        display.refresh()  # force the display to refresh
55    time.sleep(0.5)
56
57    # run the dial from maximum to minimum
58    for this_value in range(maximum_value, minimum_value - 1, -step_size):
59        my_dial.value = this_value
60        display.refresh()  # force the display to refresh
61    time.sleep(0.5)