If you have issues running the example, you can always test your hardware by running a UF2 for your display from https://learn.adafruit.com/adafruit-qualia-esp32-s3-for-rgb666-displays/arduino-rainbow-demo
This display is the easiest display and needs no initialization.
init_sequence_tl040hds20 = bytes()
tft_timings = {
"frequency": 16000000,
"width": 720,
"height": 720,
"hsync_pulse_width": 2,
"hsync_front_porch": 46,
"hsync_back_porch": 44,
"vsync_pulse_width": 2,
"vsync_front_porch": 16,
"vsync_back_porch": 18,
"hsync_idle_low": False,
"vsync_idle_low": False,
"de_idle_high": False,
"pclk_active_high": False,
"pclk_idle_high": False,
}
from displayio import release_displays
release_displays()
import displayio
import busio
import board
import dotclockframebuffer
from framebufferio import FramebufferDisplay
tft_pins = dict(board.TFT_PINS)
tft_timings = {
"frequency": 16000000,
"width": 720,
"height": 720,
"hsync_pulse_width": 2,
"hsync_front_porch": 46,
"hsync_back_porch": 44,
"vsync_pulse_width": 2,
"vsync_front_porch": 16,
"vsync_back_porch": 18,
"hsync_idle_low": False,
"vsync_idle_low": False,
"de_idle_high": False,
"pclk_active_high": False,
"pclk_idle_high": False,
}
init_sequence_tl040hds20 = bytes()
board.I2C().deinit()
i2c = busio.I2C(board.SCL, board.SDA)
tft_io_expander = dict(board.TFT_IO_EXPANDER)
#tft_io_expander['i2c_address'] = 0x38 # uncomment for rev B
dotclockframebuffer.ioexpander_send_init_sequence(i2c, init_sequence_tl040hds20, **tft_io_expander)
i2c.deinit()
bitmap = displayio.OnDiskBitmap("/display-ruler-720p.bmp")
fb = dotclockframebuffer.DotClockFramebuffer(**tft_pins, **tft_timings)
display = FramebufferDisplay(fb, auto_refresh=False)
# Create a TileGrid to hold the bitmap
tile_grid = displayio.TileGrid(bitmap, pixel_shader=bitmap.pixel_shader)
# Create a Group to hold the TileGrid
group = displayio.Group()
# Add the TileGrid to the Group
group.append(tile_grid)
# Add the Group to the Display
display.root_group = group
display.auto_refresh = True
# Loop forever so you can enjoy your image
while True:
pass
Download the following image into the root folder of of your CIRCUITPY drive:
Go ahead and save the example you your CircuitPython code.py and run the code. Your display should now look like this:
Page last edited March 08, 2024
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