adding ble patchwork

examples/clue_ble_color_patchwork.py

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+"""
+Circuit Python BLE Color Patchwork
+This demo uses advertising to broadcast a color of the users choice.
+We will show a color "patch" on the screen for every unique device
+advertisement that we find.
+"""
+
+import time
+import random
+import board
+from adafruit_clue import clue
+import displayio
+from adafruit_ble import BLERadio
+from adafruit_ble.advertising.adafruit import AdafruitColor
+from adafruit_display_shapes.rect import Rect
+from adafruit_display_text import label
+import terminalio
+
+MODE_COLOR_SELECT = 0
+MODE_SHOW_PATCHWORK = 1
+
+COLOR_TRANSPARENT_INDEX = 0
+COLOR_OFFWHITE_INDEX = 1
+
+PROXIMITY_LIMIT = 100
+
+current_mode = MODE_SHOW_PATCHWORK
+
+# The color pickers will cycle through this list with buttons A and B.
+color_options = [
+    0xEE0000,
+    0xEEEE00,
+    0x00EE00,
+    0x00EEEE,
+    0x0000EE,
+    0xEE00EE,
+    0xCCCCCC,
+    0xFF9999,
+    0x99FF99,
+    0x9999FF,
+]
+
+
+# make all pixels in the patchwork bitmap transparent
+def make_transparent():
+    palette_mapping.make_transparent(0)
+    for i in range(0, 8):
+        for j in range(0, 8):
+            bitmap[i, j] = 0
+
+
+# make the pixels in the patchwork white by setting them in the palette
+def make_white():
+    for i in range(2, 66):
+        palette_mapping[i] = 0xFFFFFF
+
+
+# draw the patchwork grid based on nearby_colors
+def draw_grid():
+    for i, color in enumerate(nearby_colors):
+        if i < 64:
+            palette_mapping[i + 2] = (
+                color & 0xFFFFFF
+            )  # Mask 0xFFFFFF to avoid invalid color.
+            print(i)
+            print(color)
+
+
+# create a fake mac address and color for testing
+def add_fake():
+    fake_mac = "".join([random.choice("0123456789abcdef") for _ in range(10)])
+    fake_color = random.choice(color_options)
+    nearby_addresses.append(fake_mac)
+    nearby_colors.append(fake_color)
+
+
+# find nearby devices advertising colors
+def ble_scan():
+    print("scanning")
+    # loop over all found devices
+    for entry in ble.start_scan(AdafruitColor, minimum_rssi=-100, timeout=1):
+        # if this device is not in the list already
+        if entry.color in color_options:
+            print("new color")
+        if entry.address.address_bytes not in nearby_addresses:
+            # print(entry.color)
+            # add the address and color to respective lists
+            nearby_addresses.append(entry.address.address_bytes)
+            nearby_colors.append(entry.color)
+        else:  # address was already in the list
+            # update the color to currently advertised value
+            _index = nearby_addresses.index(entry.address.address_bytes)
+            nearby_colors[_index] = entry.color
+
+
+# set a new color to be advertised
+def change_advertisement(color):
+    ble.stop_advertising()
+    advertisement.color = color
+    ble.start_advertising(advertisement)
+    # set NeoPixel to selected advertised
+    clue.pixel.fill(color)
+    # update top left self patch
+    nearby_colors[0] = color
+
+
+# BLE Setup
+ble = BLERadio()
+advertisement = AdafruitColor()
+advertisement.color = color_options[0]
+
+# init neopixel
+clue.pixel.fill(color_options[0])
+clue.pixel.brightness = 0.05
+
+display = board.DISPLAY
+
+# Create a bitmap with two colors + 64 colors for the map
+bitmap = displayio.Bitmap(8, 8, 64 + 2)
+
+# Create a 8*8 bitmap pre-filled with 64 colors (color 0 and 1 are reserved)
+for _i in range(0, 8):
+    for _j in range(0, 8):
+        bitmap[_i, _j] = 2 + _i + _j * 8
+
+# Create an empty palette that will be used in one to one mapping
+palette_mapping = displayio.Palette(64 + 2)
+
+palette_mapping[0] = 0x000000
+palette_mapping[1] = 0xFFFFFF
+
+color_select_palette = displayio.Palette(len(color_options))
+for _i, _color in enumerate(color_options):
+    color_select_palette[_i] = _color
+
+# Color Select Layout
+color_select_group = displayio.Group(max_size=10)
+color_select_text_group = displayio.Group(max_size=4, scale=3)
+
+# white backrground
+background = Rect(0, 0, 240, 240, fill=0xFFFFFF)
+center_line = Rect(119, 0, 2, 180, fill=0x000000)
+
+# box around the color preview
+bottom_box = Rect(79, 174, 80, 80, fill=0xFFFFFF, outline=0x000000, stroke=2)
+
+left_btn_lbl = label.Label(terminalio.FONT, text="A", color=0x000000)
+right_btn_lbl = label.Label(terminalio.FONT, text="B", color=0x000000)
+
+left_btn_action = label.Label(
+    terminalio.FONT, text="Next\nColor", color=0x000000, line_spacing=1
+)
+right_btn_action = label.Label(terminalio.FONT, text="Save", color=0x000000)
+
+color_select_text_group.append(left_btn_lbl)
+color_select_text_group.append(right_btn_lbl)
+
+color_select_text_group.append(left_btn_action)
+color_select_text_group.append(right_btn_action)
+
+# x position centered on 25% of screen
+left_btn_lbl.anchor_point = (0.5, 0)
+left_btn_lbl.anchored_position = ((240 / 4) // 3, 21 // 3)
+
+# x position centered on 75% of screen
+right_btn_lbl.anchor_point = (0.5, 0)
+right_btn_lbl.anchored_position = ((240 / 4), 21 // 3)
+
+# x position centered on 25% of screen
+left_btn_action.anchor_point = (0.5, 0)
+left_btn_action.anchored_position = ((240 / 4) // 3, 96 // 3)
+
+# x position centered on 75% of screen
+right_btn_action.anchor_point = (0.5, 0)
+right_btn_action.anchored_position = ((240 / 4), 96 // 3)
+
+color_select_group.append(background)
+color_select_group.append(center_line)
+color_select_group.append(bottom_box)
+color_select_group.append(color_select_text_group)
+
+# color preview bmp
+color_select_preview_bmp = displayio.Bitmap(1, 1, len(color_options))
+color_preview_group = displayio.Group(scale=30 * 2)
+
+# centered horizontally near bottom on screen
+color_preview_group.x = 240 // 2 - 60 // 2
+color_preview_group.y = 240 - (60 + 2)
+
+color_preview_tilegrid = displayio.TileGrid(
+    color_select_preview_bmp, pixel_shader=color_select_palette
+)
+color_preview_group.append(color_preview_tilegrid)
+
+# Create a TileGrid using the Bitmap and Palette
+tile_grid = displayio.TileGrid(bitmap, pixel_shader=palette_mapping)
+patchwork_group = displayio.Group(scale=30)
+patchwork_group.append(tile_grid)
+
+# Create main Group
+group = displayio.Group()
+
+# Add the patchwork to the main
+group.append(patchwork_group)
+
+# Add the Group to the Display
+display.show(group)
+
+cur_color = 0
+
+prev_b = clue.button_b
+prev_a = clue.button_a
+
+nearby_addresses = ["myself"]
+nearby_colors = [color_options[cur_color]]
+
+make_white()
+
+last_scan_time = -30
+SCAN_INTERVAL = 30  # seconds
+
+while True:
+    now = time.monotonic()
+    cur_a = clue.button_a
+    cur_b = clue.button_b
+    if current_mode == MODE_SHOW_PATCHWORK:
+        # a button was pressed
+        if cur_a and not prev_a:
+            current_mode = MODE_COLOR_SELECT
+
+            # insert color select layout
+            group.append(color_select_group)
+            group.append(color_preview_group)
+
+        # is it time to scan?
+        if last_scan_time + SCAN_INTERVAL < now:
+            ble_scan()
+            last_scan_time = now
+            print("after scan found {} results".format(len(nearby_colors)))
+            # print(nearby_addresses)
+            draw_grid()
+
+        if clue.proximity >= PROXIMITY_LIMIT:
+            clue.white_leds = True
+            while clue.proximity >= PROXIMITY_LIMIT:
+                r, g, b, w = clue.color
+                clue.pixel.fill(((r >> 8) & 0xFF, (g >> 8) & 0xFF, (b >> 8) & 0xFF))
+                change_advertisement(
+                    ((r & 0xFF00) << 8) + (g & 0xFF00) + ((b >> 8) & 0xFF)
+                )
+                time.sleep(0.1)
+            clue.white_leds = False
+
+    elif current_mode == MODE_COLOR_SELECT:
+        # current selection preview
+        color_select_preview_bmp[0, 0] = cur_color
+
+        # a button was pressed
+        if cur_a and not prev_a:
+            print("a button")
+            # increment currently selected color index
+            cur_color += 1
+            # reset to 0 if it's too big
+            if cur_color >= len(color_options):
+                cur_color = 0
+            print(cur_color)
+        # b button was pressed
+        if cur_b and not prev_b:
+            print("b button")
+            # advertise new color selection
+            change_advertisement(color_options[cur_color])
+
+            # go back to patchwork mode
+            current_mode = MODE_SHOW_PATCHWORK
+            # remove color select background
+            group.remove(color_select_group)
+            group.remove(color_preview_group)
+            make_white()
+            draw_grid()
+    prev_a = cur_a
+    prev_b = cur_b