ST7789/PicoGraphics: Update some examples.

micropython/examples/breakout_colourlcd240x240/colourlcd240x240_demo.py

@@ -1,10 +1,10 @@
 import time
 import random
-from st7789 import ST7789, PALETTE_USER
+from st7789 import ST7789, PALETTE_USER, DISPLAY_LCD_240X240
 
-WIDTH, HEIGHT = 240, 240
+display = ST7789(DISPLAY_LCD_240X240, rotate=0)
 
-display = ST7789(WIDTH, HEIGHT, round=False)
+WIDTH, HEIGHT = display.get_bounds()
 
 # We're creating 100 balls with their own individual colour and 1 BG colour
 # for a total of 101 colours, which will all fit in the 256 entry palette!
@@ -37,7 +37,7 @@ for i in range(0, 100):
             display.create_pen(random.randint(0, 255), random.randint(0, 255), random.randint(0, 255)),
         )
     )
-    
+
 BG = display.create_pen(40, 40, 40)
 
 while True:
@@ -64,4 +64,3 @@ while True:
 
     display.update()
     time.sleep(0.01)
-

micropython/examples/pico_display/basic_qrcode.py

@@ -1,12 +1,12 @@
 import st7789
 import qrcode
 
-# Set the display resolution
-# in most cases you can swap WIDTH weith HEIGHT for portrait mode
-WIDTH, HEIGHT = 240, 135    # Pico Display
-# WIDTH, HEIGHT = 320, 240  # Pico Display 2.0
+display = st7789.ST7789(st7789.DISPLAY_PICO_DISPLAY, rotate=0)
 
-display = st7789.ST7789(WIDTH, HEIGHT, rotate180=False)
+WIDTH, HEIGHT = display.get_bounds()
+
+BG = display.create_pen(0, 0, 0)
+FG = display.create_pen(128, 128, 128)
 
 
 def measure_qr_code(size, code):
@@ -17,9 +17,9 @@ def measure_qr_code(size, code):
 
 def draw_qr_code(ox, oy, size, code):
     size, module_size = measure_qr_code(size, code)
-    display.set_pen(128, 128, 128)
+    display.set_pen(FG)
     display.rectangle(ox, oy, size, size)
-    display.set_pen(0, 0, 0)
+    display.set_pen(BG)
     for x in range(size):
         for y in range(size):
             if code.get_module(x, y):
@@ -29,14 +29,16 @@ def draw_qr_code(ox, oy, size, code):
 code = qrcode.QRCode()
 code.set_text("shop.pimoroni.com")
 
-display.set_pen(128, 128, 128)
+display.set_pen(FG)
 display.clear()
-display.set_pen(0, 0, 0)
+display.set_pen(BG)
 
-size, module_size = measure_qr_code(HEIGHT, code)
+max_size = min(WIDTH, HEIGHT)
+
+size, module_size = measure_qr_code(max_size, code)
 left = int((WIDTH // 2) - (size // 2))
 top = int((HEIGHT // 2) - (size // 2))
-draw_qr_code(left, top, HEIGHT, code)
+draw_qr_code(left, top, max_size, code)
 
 display.update()
 

micropython/examples/pico_display/buttons.py

@@ -4,14 +4,11 @@ import st7789
 import utime
 from pimoroni import Button
 
-# Set the display resolution
-# in most cases you can swap WIDTH weith HEIGHT for portrait mode
-WIDTH, HEIGHT = 240, 135    # Pico Display
-# WIDTH, HEIGHT = 320, 240  # Pico Display 2.0
 
-display = st7789.ST7789(WIDTH, HEIGHT, rotate180=False)
+display = st7789.ST7789(st7789.DISPLAY_PICO_DISPLAY, rotate=0)
 display.set_backlight(0.5)
 
+WIDTH, HEIGHT = display.get_bounds()
 
 button_a = Button(12)
 button_b = Button(13)

micropython/examples/pico_display/demo.py

@@ -2,11 +2,9 @@ import time
 import random
 import st7789
 
-# Set the display resolution, in most cases you can flip these for portrait mode
-WIDTH, HEIGHT = 240, 135    # Pico Display
-# WIDTH, HEIGHT = 320, 240  # Pico Display 2.0
+display = st7789.ST7789(st7789.DISPLAY_PICO_DISPLAY, rotate=0)
 
-display = st7789.ST7789(WIDTH, HEIGHT, rotate180=False)
+WIDTH, HEIGHT = display.get_bounds()
 
 display.set_backlight(1.0)
 

micropython/examples/pico_display/rainbow.py

@@ -4,13 +4,11 @@ import utime
 import st7789
 from pimoroni import RGBLED
 
-# Set the display resolution
-# in most cases you can swap WIDTH weith HEIGHT for portrait mode
-WIDTH, HEIGHT = 240, 135    # Pico Display
-# WIDTH, HEIGHT = 320, 240  # Pico Display 2.0
-
-display = st7789.ST7789(WIDTH, HEIGHT, rotate180=False)
+display = st7789.ST7789(st7789.DISPLAY_PICO_DISPLAY, rotate=0)
 display.set_backlight(0.8)
+display.set_palette_mode(st7789.PALETTE_USER)
+
+WIDTH, HEIGHT = display.get_bounds()
 
 led = RGBLED(6, 7, 8)
 
@@ -41,13 +39,18 @@ def hsv_to_rgb(h, s, v):
 
 h = 0
 
+BLACK = display.create_pen(0, 0, 0)
+RAINBOW = BLACK + 1  # Put RAINBOW right after BLACK in the palette
+
+
 while True:
     h += 1
     r, g, b = [int(255 * c) for c in hsv_to_rgb(h / 360.0, 1.0, 1.0)]  # rainbow magic
     led.set_rgb(r, g, b)      # Set LED to a converted HSV value
-    display.set_pen(r, g, b)  # Set pen to a converted HSV value
+    display.set_palette(RAINBOW, st7789.RGB565(r, g, b)) # Create pen with converted HSV value
+    display.set_pen(RAINBOW)  # Set pen
     display.clear()           # Fill the screen with the colour
-    display.set_pen(0, 0, 0)  # Set pen to black
+    display.set_pen(BLACK)    # Set pen to black
     display.text("pico disco!", 10, 10, 240, 6)  # Add some text
     display.update()          # Update the display
     utime.sleep(1.0 / 60)

micropython/examples/pico_display/thermometer.py

@@ -7,16 +7,18 @@ import utime
 import st7789
 from pimoroni import RGBLED
 
-# Set the display resolution
-# in most cases you can swap WIDTH weith HEIGHT for portrait mode
-WIDTH, HEIGHT = 135, 240    # Pico Display
-# WIDTH, HEIGHT = 320, 240  # Pico Display 2.0
-
-display = st7789.ST7789(WIDTH, HEIGHT, rotate180=False)
+display = st7789.ST7789(st7789.DISPLAY_PICO_DISPLAY, rotate=0)
+display.set_palette_mode(st7789.PALETTE_USER)
 
 # Set the display backlight to 50%
 display.set_backlight(0.5)
 
+WIDTH, HEIGHT = display.get_bounds()
+
+BLACK = display.create_pen(0, 0, 0)
+WHITE = display.create_pen(255, 255, 255)
+TEMPERATURE = WHITE + 1
+
 led = RGBLED(6, 7, 8)
 
 # reads from Pico's temp sensor and converts it into a more manageable number
@@ -53,7 +55,7 @@ def temperature_to_color(temp):
 
 while True:
     # fills the screen with black
-    display.set_pen(0, 0, 0)
+    display.set_pen(BLACK)
     display.clear()
 
     # the following two lines do some maths to convert the number from the temp sensor into celsius
@@ -68,8 +70,9 @@ while True:
 
     i = 0
     for t in temperatures:
-        # chooses a pen colour based on the temperature
-        display.set_pen(*temperature_to_color(t))
+        # chooses a pen colour based on the temperature and update the palette entry
+        display.set_palette(TEMPERATURE, st7789.RGB565(*temperature_to_color(t)))
+        display.set_pen(TEMPERATURE)
 
         # draws the reading as a tall, thin rectangle
         display.rectangle(i, HEIGHT - (round(t) * 4), bar_width, HEIGHT)
@@ -82,11 +85,11 @@ while True:
     led.set_rgb(*temperature_to_color(temperature))
 
     # draws a white background for the text
-    display.set_pen(255, 255, 255)
+    display.set_pen(WHITE)
     display.rectangle(1, 1, 100, 25)
 
     # writes the reading as text in the white rectangle
-    display.set_pen(0, 0, 0)
+    display.set_pen(BLACK)
     display.text("{:.2f}".format(temperature) + "c", 3, 3, 0, 3)
 
     # time to update the display