Merge pull request #2487 from jedgarpark/lcars

updated code and sprites

Author: TheKitty

LCARS/bmps/1_lcars_anim_sheet.bmp

@@ -2,21 +2,28 @@
 #
 # SPDX-License-Identifier: MIT
 # LCARS MatrixPortal Display
+# LED brigthness code by Jan Goolsbey
 
 import time
 import os
 import board
 import displayio
 from digitalio import DigitalInOut, Pull
+from simpleio import map_range  # For color brightness calculation
 from adafruit_matrixportal.matrix import Matrix
 from adafruit_debouncer import Debouncer
 
+import supervisor
+supervisor.runtime.autoreload = True
+
 SPRITESHEET_FOLDER = "/bmps"
 DEFAULT_FRAME_DURATION = 0.7  # 100ms
 AUTO_ADVANCE_LOOPS = 3
+bitmap = ""
+brightness = 15  # ### Integer value from 0 to 15
 
 # --- Display setup ---
-matrix = Matrix(bit_depth=1, width=128, height=64)
+matrix = Matrix(bit_depth=4, width=128, height=64)
 sprite_group = displayio.Group()
 matrix.display.show(sprite_group)
 
@@ -47,19 +54,28 @@
 frame_count = 0
 frame_duration = DEFAULT_FRAME_DURATION
 
+def image_brightness(new_bright=0):
+    """Calculate the white color brightness.
+    Returns a white RBG888 color value proportional to `new_bright`."""
+    # Scale brightness value
+    bright = int(map_range(new_bright, 0, 15, 0x00, 0xFF))
+    # Recombine and return a composite RGB888 value
+    return (bright << 16) + (bright << 8) + bright
 
 def load_image():
     """
     Load an image as a sprite
     """
     # pylint: disable=global-statement
-    global current_frame, current_loop, frame_count, frame_duration
+    global current_frame, current_loop, frame_count, frame_duration, bitmap
     while sprite_group:
         sprite_group.pop()
 
     filename = SPRITESHEET_FOLDER + "/" + file_list[current_image]
 
     bitmap = displayio.OnDiskBitmap(filename)
+    ### Change the palette value proportional to BRIGHTNESS
+    bitmap.pixel_shader[1] = image_brightness(brightness)
     sprite = displayio.TileGrid(
         bitmap,
         pixel_shader=bitmap.pixel_shader,
@@ -102,14 +118,19 @@ def advance_frame():
 
 advance_image()
 
+last_time = time.monotonic()
+
+
 while True:
     button_down.update()
     button_up.update()
     if button_up.fell:
-        print("up fell")
-        auto_advance = not auto_advance
-    if button_down.fell:
-        print("down fell")
         advance_image()
-    advance_frame()
-    time.sleep(frame_duration)
+    if button_down.fell:
+        brightness = (brightness + 2) % 16
+        print(brightness)
+        bitmap.pixel_shader[1] = image_brightness(brightness)  # ### Change the brightness
+
+    if time.monotonic() - last_time > frame_duration:
+        advance_frame()
+        last_time = time.monotonic()