Merge pull request #4 from makermelissa/master

Added example for new 320x240 display

Author: ladyada

.gitignore

@@ -1,6 +1,12 @@
+*.mpy
+.idea
 __pycache__
 _build
 *.pyc
 .env
 build*
 bundles
+*.DS_Store
+.eggs
+dist
+**/*.egg-info

examples/st7789_320x240_simpletest.py

@@ -0,0 +1,37 @@
+"""
+This test will initialize the display using displayio
+and draw a solid red background
+"""
+
+import board
+import displayio
+from adafruit_st7789 import ST7789
+
+spi = board.SPI()
+while not spi.try_lock():
+    pass
+spi.configure(baudrate=24000000) # Configure SPI for 24MHz
+spi.unlock()
+tft_cs = board.D5
+tft_dc = board.D6
+
+displayio.release_displays()
+display_bus = displayio.FourWire(spi, command=tft_dc, chip_select=tft_cs, reset=board.D9)
+
+display = ST7789(display_bus, width=320, height=240, rotation=90)
+
+# Make the display context
+splash = displayio.Group(max_size=10)
+display.show(splash)
+
+color_bitmap = displayio.Bitmap(320, 240, 1)
+color_palette = displayio.Palette(1)
+color_palette[0] = 0xFF0000
+
+bg_sprite = displayio.TileGrid(color_bitmap,
+                               pixel_shader=color_palette,
+                               x=0, y=0)
+splash.append(bg_sprite)
+
+while True:
+    pass