Fix BGR/RGB bit settings and add example

adafruit_st7735r.py

@@ -74,7 +74,11 @@ def __init__(self, bus, *, bgr=False, invert=False, **kwargs):
         init_sequence = _INIT_SEQUENCE
         if bgr:
             init_sequence += (
-                b"\x36\x01\xC8"  # _MADCTL Default rotation plus BGR encoding
+                b"\x36\x01\xC0"  # _MADCTL Default rotation plus BGR encoding
+            )
+        else:
+            init_sequence += (
+                b"\x36\x01\xC8"  # _MADCTL Default rotation plus RGB encoding
             )
         if invert:
             init_sequence += b"\x21\x00"  # _INVON

docs/examples.rst

@@ -1,4 +1,4 @@
-Simple test
+Simple Test
 ------------
 
 Ensure your device works with this simple test.
@@ -7,16 +7,20 @@ Ensure your device works with this simple test.
     :caption: examples/st7735r_simpletest.py
     :linenos:
 
-128x160 Simple test
+128x160 Tests
 --------------------
 
-Example for the 128x160
+Examples for the 128x160
 
 .. literalinclude:: ../examples/st7735r_128x160_simpletest.py
     :caption: examples/st7735r_128x160_simpletest.py
     :linenos:
 
-Minitft featherwing test
+.. literalinclude:: ../examples/st7735r_128x160_colored_labels.py
+    :caption: examples/st7735r_128x160_colored_labels.py
+    :linenos:
+
+Minitft FeatherWing Test
 -------------------------
 
 Simple example for the minitft featherwing
@@ -25,7 +29,7 @@ Simple example for the minitft featherwing
     :caption: examples/st7735r_minitft_featherwing_simpletest.py
     :linenos:
 
-Minitft test
+MiniTFT Test
 ------------
 
 Simple example for the minitft

examples/st7735r_128x160_colored_labels.py

@@ -0,0 +1,62 @@
+# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
+# SPDX-License-Identifier: MIT
+
+"""
+This test will initialize the display using displayio and draw 8 colored
+labels. Useful for testing the color settings on an unknown display.
+"""
+
+import board
+import terminalio
+import displayio
+from adafruit_display_text import label
+from adafruit_st7735r import ST7735R
+
+# Release any resources currently in use for the displays
+displayio.release_displays()
+
+spi = board.SPI()
+tft_cs = board.D5
+tft_dc = board.D6
+
+display_bus = displayio.FourWire(
+    spi, command=tft_dc, chip_select=tft_cs, reset=board.D9
+)
+
+display = ST7735R(
+    display_bus, width=160, height=80, colstart=24, rotation=270, bgr=False
+)
+
+# Make the display context
+splash = displayio.Group(max_size=10)
+display.show(splash)
+
+color_bitmap = displayio.Bitmap(160, 80, 1)
+color_palette = displayio.Palette(1)
+# write some text in each font color, rgb, cmyk
+color_palette[0] = 0x111111  # light grey
+
+text_group_left = displayio.Group(max_size=10, scale=1, x=0, y=6)
+text_area_red = label.Label(terminalio.FONT, text="RED", color=0xFF0000)
+text_area_green = label.Label(terminalio.FONT, text="\nGREEN", color=0x00FF00)
+text_area_blue = label.Label(terminalio.FONT, text="\n\nBLUE", color=0x0000FF)
+text_area_white = label.Label(terminalio.FONT, text="\n\n\nWHITE", color=0xFFFFFF)
+text_group_left.append(text_area_red)
+text_group_left.append(text_area_green)
+text_group_left.append(text_area_blue)
+text_group_left.append(text_area_white)
+splash.append(text_group_left)
+
+text_group_right = displayio.Group(max_size=10, scale=1, x=80, y=6)
+text_area_cyan = label.Label(terminalio.FONT, text="CYAN", color=0x00FFFF)
+text_group_right.append(text_area_cyan)
+text_area_magenta = label.Label(terminalio.FONT, text="\nMAGENTA", color=0xFF00FF)
+text_group_right.append(text_area_magenta)
+text_area_yellow = label.Label(terminalio.FONT, text="\n\nYELLOW", color=0xFFFF00)
+text_group_right.append(text_area_yellow)
+text_area_black = label.Label(terminalio.FONT, text="\n\n\nBLACK", color=0x000000)
+text_group_right.append(text_area_black)
+splash.append(text_group_right)
+
+while True:
+    pass