Add starter MatrixPortal example

Author: hugodahl

examples/progressbar_matrixportal.py

@@ -0,0 +1,79 @@
+# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
+# SPDX-License-Identifier: MIT
+
+# Source: https://github.com/ajs256/matrixportal-weather-display
+
+# ############## IMPORTS ###############
+
+# HARDWARE
+import time
+import board
+
+# DISPLAY
+import displayio  # Main display library
+import framebufferio  # For showing things on the display
+import rgbmatrix  # For talking to matrices specifically
+
+# CONTROLS
+
+from adafruit_progressbar.progressbar import ProgressBar
+
+# ############## DISPLAY SETUP ###############
+
+# If there was a display before (protomatter, LCD, or E-paper), release it so
+# we can create ours
+displayio.release_displays()
+
+print("Setting up RGB matrix")
+
+# This next call creates the RGB Matrix object itself. It has the given width
+# and height.
+#
+# These lines are for the Matrix Portal. If you're using a different board,
+# check the guide to find the pins and wiring diagrams for your board.
+# If you have a matrix with a different width or height, change that too.
+matrix = rgbmatrix.RGBMatrix(
+    width=64,
+    height=32,
+    bit_depth=3,
+    rgb_pins=[
+        board.MTX_R1,
+        board.MTX_G1,
+        board.MTX_B1,
+        board.MTX_R2,
+        board.MTX_G2,
+        board.MTX_B2,
+    ],
+    addr_pins=[board.MTX_ADDRA, board.MTX_ADDRB, board.MTX_ADDRC, board.MTX_ADDRD],
+    clock_pin=board.MTX_CLK,
+    latch_pin=board.MTX_LAT,
+    output_enable_pin=board.MTX_OE,
+)
+
+# Associate the RGB matrix with a Display so that we can use displayio features
+display = framebufferio.FramebufferDisplay(matrix)
+
+print("Adding display group")
+group = displayio.Group(max_size=5)  # Create a group to hold all our labels
+display.show(group)
+
+print("Creating progress bar and adding to group")
+progress_bar = ProgressBar(2, 8, 40, 14, 0.6)
+
+group.insert(0, progress_bar)
+
+progress_bar_value = 0.0
+progress_bar_incr = 3.0
+
+while True:
+    if progress_bar_value > 100:
+        progress_bar_value = 100
+        progress_bar_incr *= -1
+
+    if progress_bar_value < 0:
+        progress_bar_value = 0
+        progress_bar_incr *= -1
+
+    progress_bar.progress = progress_bar_value / 100
+    progress_bar_value += progress_bar_incr
+    time.sleep(0.5)