m5stack atoms3 examples

examples/atom_s3/feathers.py

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+"""
+feathers.py
+
+    Smoothly scroll mirrored rainbow colored random curves across the display.
+
+"""
+
+import random
+import math
+import utime
+from machine import Pin, SPI
+import st7789py as st7789
+
+
+def between(left, right, along):
+    """returns a point along the curve from left to right"""
+    dist = (1 - math.cos(along * math.pi)) / 2
+    return left * (1 - dist) + right * dist
+
+
+def color_wheel(position):
+    """returns a 565 color from the given position of the color wheel"""
+    position = (255 - position) % 255
+
+    if position < 85:
+        return st7789.color565(255 - position * 3, 0, position * 3)
+
+    if position < 170:
+        position -= 85
+        return st7789.color565(0, position * 3, 255 - position * 3)
+
+    position -= 170
+    return st7789.color565(position * 3, 255 - position * 3, 0)
+
+
+def main():
+    '''
+    The big show!
+    '''
+    #enable display and clear screen
+    spi = SPI(2, baudrate=40000000, sck=Pin(17), mosi=Pin(21), miso=None)
+    tft = st7789.ST7789(
+        spi,
+        128,
+        128,
+        reset=Pin(34, Pin.OUT),
+        cs=Pin(15, Pin.OUT),
+        dc=Pin(33, Pin.OUT),
+        backlight=Pin(16, Pin.OUT),
+        rotation=1,
+        color_order=st7789.BGR)
+
+
+    height = tft.height         # height of display in pixels
+    width = tft.width           # width if display in pixels
+
+    tfa = 1                     # top free area when scrolling
+    bfa = 3         	        # bottom free area when scrolling
+
+    scroll = 0                  # scroll position
+    wheel = 0                   # color wheel position
+
+    tft.vscrdef(tfa, width, bfa)    # set scroll area
+    tft.vscsad(scroll + tfa)        # set scroll position
+    tft.fill(st7789.BLACK)          # clear screen
+
+    half = (height >> 1) - 1    # half the height of the dislay
+    interval = 0                # steps between new points
+    increment = 0               # increment per step
+    counter = 1                 # step counter, overflow to start
+    current_y = 0               # current_y value (right point)
+    last_y = 0                  # last_y value (left point)
+
+    # segment offsets
+    x_offsets = [x * (width // 8) -1 for x in range(2,9)]
+
+    while True:
+        # when the counter exceeds the interval, save current_y to last_y,
+        # choose a new random value for current_y between 0 and 1/2 the
+        # height of the display, choose a new random interval then reset
+        # the counter to 0
+
+        if counter > interval:
+            last_y = current_y
+            current_y = random.randint(0, half)
+            counter = 0
+            interval = random.randint(10, 100)
+            increment = 1/interval      # increment per step
+
+        # clear the first column of the display and scroll it
+        tft.vline(scroll, 0, height, st7789.BLACK)
+        tft.vscsad(scroll + tfa)
+
+        # get the next point between last_y and current_y
+        tween = int(between(last_y, current_y, counter * increment))
+
+        # draw mirrored pixels across the display at the offsets using the color_wheel effect
+        for i, x_offset in enumerate(x_offsets):
+            tft.pixel((scroll + x_offset) % width, half + tween, color_wheel(wheel+(i<<2)))
+            tft.pixel((scroll + x_offset) % width, half - tween, color_wheel(wheel+(i<<2)))
+
+        # increment scroll, counter, and wheel
+        scroll = (scroll + 1) % width
+        wheel = (wheel + 1) % 256
+        counter += 1
+
+
+main()

examples/atom_s3/rotations.py

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+"""
+feathers.py
+
+    Smoothly scroll mirrored rainbow colored random curves across the display.
+
+"""
+
+import random
+import math
+import time
+from machine import Pin, SPI
+import st7789py as st7789
+import vga1_8x8 as font
+
+
+def center_on(display, font, text, y, fg, bg):
+    '''
+    Center the text on the display
+    '''
+    x = (display.width - len(text) * font.WIDTH) // 2
+    display.text(font, text, x, y, fg, bg)
+
+def main():
+    '''
+    The big show!
+    '''
+    #enable display and clear screen
+
+    spi = SPI(2, baudrate=40000000, sck=Pin(17), mosi=Pin(21), miso=None)
+    tft = st7789.ST7789(
+        spi,
+        128,
+        128,
+        reset=Pin(34, Pin.OUT),
+        cs=Pin(15, Pin.OUT),
+        dc=Pin(33, Pin.OUT),
+        backlight=Pin(16, Pin.OUT),
+        rotation=1,
+        color_order=st7789.BGR)
+
+    height = tft.height         # height of display in pixels
+    width = tft.width           # width if display in pixels
+
+    while True:
+        for rotation in range(4):
+            tft.rotation(rotation)
+            tft.fill(st7789.BLACK)
+            tft.rect(0, 0, width, height, st7789.RED)
+            center_on(tft, font, "Rotation", height // 2 - font.HEIGHT, st7789.WHITE, st7789.BLACK)
+            center_on(tft, font, str(rotation), height // 2 + font.HEIGHT, st7789.WHITE, st7789.BLACK)
+            time.sleep(1)
+
+main()

examples/atom_s3/scroll.py

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+"""
+scroll.py
+
+    Smoothly scrolls all font characters up the screen on the LILYGO® TTGO
+    T-Display. Only works with fonts with heights that are even multiples of
+    the screen height, (i.e. 8 or 16 pixels high)
+
+"""
+import time
+import random
+from machine import Pin, SPI
+import st7789py as st7789
+
+# choose a font
+
+# from romfonts import vga1_8x8 as font
+# from romfonts import vga2_8x8 as font
+# from romfonts import vga1_8x16 as font
+# from romfonts import vga2_8x16 as font
+# from romfonts import vga1_16x16 as font
+# from romfonts import vga1_bold_16x16 as font
+# from romfonts import vga2_16x16 as font
+from romfonts import vga2_bold_16x16 as font
+
+
+def main():
+    spi = SPI(2, baudrate=40000000, sck=Pin(17), mosi=Pin(21), miso=None)
+    tft = st7789.ST7789(
+        spi,
+        128,
+        128,
+        reset=Pin(34, Pin.OUT),
+        cs=Pin(15, Pin.OUT),
+        dc=Pin(33, Pin.OUT),
+        backlight=Pin(16, Pin.OUT),
+        rotation=0,
+        color_order=st7789.BGR)
+
+    last_line = tft.height - font.HEIGHT
+    tfa = 1                     # top free area when scrolling
+    bfa = 3         	        # bottom free area when scrolling
+
+    tft.vscrdef(tfa, tft.height, bfa)
+
+    tft.fill(st7789.BLUE)
+    scroll = 0
+    character = 0
+    while True:
+        tft.fill_rect(0, scroll, tft.width, 1, st7789.BLUE)
+
+        if scroll % font.HEIGHT == 0:
+            tft.text(
+                font,
+                f' x{character:02x}= {chr(character)} ',
+                0,
+                (scroll + last_line) % tft.height,
+                st7789.WHITE,
+                st7789.BLUE)
+
+            character = (character + 1) % (font.LAST+1)
+
+        tft.vscsad(scroll + tfa)
+        scroll += 1
+        time.sleep_ms(10)
+
+        if scroll == tft.height:
+            scroll = 0
+
+
+main()