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"""ILI9341 demo (animated sprite).
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Note: This demo requires a board with additional PSRAM.
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"""
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from ili9341 import Display
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from machine import Pin, SPI # type: ignore
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from micropython import const # type: ignore
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from utime import sleep_us, ticks_us, ticks_diff # type: ignore
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SPRITE_WIDTH = const(221)
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SPRITE_HEIGHT = const(154)
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SPRITE_COUNT = const(8)
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SIZE = const(68068) # width (221) x height (154) x bytes of color (2)
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def test():
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"""Animated sprite."""
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try:
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# Baud rate of 40000000 seems about the max
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spi = SPI(1, baudrate=40000000, sck=Pin(14), mosi=Pin(13))
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display = Display(spi, dc=Pin(4), cs=Pin(16), rst=Pin(17))
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display.clear()
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# Load sprite
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cat = display.load_sprite('images/Cat221x1232.raw',
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SPRITE_WIDTH, SPRITE_HEIGHT * SPRITE_COUNT)
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# Use memoryview to improve memory usage
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mv_cat = memoryview(cat)
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x = (display.width - SPRITE_WIDTH) // 2
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y = (display.height - SPRITE_HEIGHT) // 2
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index = 0 # Sprite frame index
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while True:
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timer = ticks_us()
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offset = SIZE * index
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display.draw_sprite(mv_cat[offset: offset + SIZE], x, y,
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SPRITE_WIDTH, SPRITE_HEIGHT)
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index = (index + 1) % 8 # Set current index
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# Attempt to set framerate to 30 FPS
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timer_dif = 33333 - ticks_diff(ticks_us(), timer)
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if timer_dif > 0:
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sleep_us(timer_dif)
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except KeyboardInterrupt:
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display.cleanup()
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test()
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