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
init_code = bytes((
b'\xff\x05w\x01\x00\x00\x13'
b'\xef\x01\x08'
b'\xff\x05w\x01\x00\x00\x10'
b'\xc0\x02w\x00'
b'\xc1\x02\x11\x0c'
b'\xc2\x02\x07\x02'
b'\xcc\x010'
b'\xb0\x10\x06\xcf\x14\x0c\x0f\x03\x00\n\x07\x1b\x03\x12\x10%6\x1e'
b'\xb1\x10\x0c\xd4\x18\x0c\x0e\x06\x03\x06\x08#\x06\x12\x100/\x1f'
b'\xff\x05w\x01\x00\x00\x11'
b'\xb0\x01s'
b'\xb1\x01|'
b'\xb2\x01\x83'
b'\xb3\x01\x80'
b'\xb5\x01I'
b'\xb7\x01\x87'
b'\xb8\x013'
b'\xb9\x02\x10\x1f'
b'\xbb\x01\x03'
b'\xc1\x01\x08'
b'\xc2\x01\x08'
b'\xd0\x01\x88'
b'\xe0\x06\x00\x00\x02\x00\x00\x0c'
b'\xe1\x0b\x05\x96\x07\x96\x06\x96\x08\x96\x00DD'
b'\xe2\x0c\x00\x00\x03\x03\x00\x00\x02\x00\x00\x00\x02\x00'
b'\xe3\x04\x00\x0033'
b'\xe4\x02DD'
b'\xe5\x10\r\xd4(\x8c\x0f\xd6(\x8c\t\xd0(\x8c\x0b\xd2(\x8c'
b'\xe6\x04\x00\x0033'
b'\xe7\x02DD'
b'\xe8\x10\x0e\xd5(\x8c\x10\xd7(\x8c\n\xd1(\x8c\x0c\xd3(\x8c'
b'\xeb\x06\x00\x01\xe4\xe4D\x00'
b'\xed\x10\xf3\xc1\xba\x0ffwDUUDwf\xf0\xab\x1c?'
b'\xef\x06\x10\r\x04\x08?\x1f'
b'\xff\x05w\x01\x00\x00\x13'
b'\xe8\x02\x00\x0e'
b'\x11\x80x'
b'\xe8\x82\x00\x0c\n'
b'\xe8\x02@\x00'
b'\xff\x05w\x01\x00\x00\x00'
b'6\x01\x00'
b':\x01f'
b')\x80\x14'
b'\xff\x05w\x01\x00\x00\x10'
b'\xe5\x02\x00\x00'
))
tft_timings = {
"frequency": 16000000,
"width": 240,
"height": 960,
"overscan_left": 120,
"hsync_pulse_width": 8,
"hsync_back_porch": 20,
"hsync_front_porch": 20,
"hsync_idle_low": False,
"vsync_pulse_width": 8,
"vsync_back_porch": 20,
"vsync_front_porch": 20,
"vsync_idle_low": False,
"pclk_active_high": True,
"pclk_idle_high": False,
"de_idle_high": False,
}
If you are getting espidf.IDFError: Invalid argument, make sure you are running CircuitPython 9.0.0-alpha.6 or later.
from displayio import release_displays
release_displays()
import time
import random
import displayio
import busio
import board
import dotclockframebuffer
from framebufferio import FramebufferDisplay
tft_pins = dict(board.TFT_PINS)
tft_timings = {
"frequency": 16000000,
"width": 240,
"height": 960,
"overscan_left": 120,
"hsync_pulse_width": 8,
"hsync_back_porch": 20,
"hsync_front_porch": 20,
"hsync_idle_low": False,
"vsync_pulse_width": 8,
"vsync_back_porch": 20,
"vsync_front_porch": 20,
"vsync_idle_low": False,
"pclk_active_high": True,
"pclk_idle_high": False,
"de_idle_high": False,
}
init_sequence_hd371 = bytes((
b'\xff\x05w\x01\x00\x00\x13'
b'\xef\x01\x08'
b'\xff\x05w\x01\x00\x00\x10'
b'\xc0\x02w\x00'
b'\xc1\x02\x11\x0c'
b'\xc2\x02\x07\x02'
b'\xcc\x010'
b'\xb0\x10\x06\xcf\x14\x0c\x0f\x03\x00\n\x07\x1b\x03\x12\x10%6\x1e'
b'\xb1\x10\x0c\xd4\x18\x0c\x0e\x06\x03\x06\x08#\x06\x12\x100/\x1f'
b'\xff\x05w\x01\x00\x00\x11'
b'\xb0\x01s'
b'\xb1\x01|'
b'\xb2\x01\x83'
b'\xb3\x01\x80'
b'\xb5\x01I'
b'\xb7\x01\x87'
b'\xb8\x013'
b'\xb9\x02\x10\x1f'
b'\xbb\x01\x03'
b'\xc1\x01\x08'
b'\xc2\x01\x08'
b'\xd0\x01\x88'
b'\xe0\x06\x00\x00\x02\x00\x00\x0c'
b'\xe1\x0b\x05\x96\x07\x96\x06\x96\x08\x96\x00DD'
b'\xe2\x0c\x00\x00\x03\x03\x00\x00\x02\x00\x00\x00\x02\x00'
b'\xe3\x04\x00\x0033'
b'\xe4\x02DD'
b'\xe5\x10\r\xd4(\x8c\x0f\xd6(\x8c\t\xd0(\x8c\x0b\xd2(\x8c'
b'\xe6\x04\x00\x0033'
b'\xe7\x02DD'
b'\xe8\x10\x0e\xd5(\x8c\x10\xd7(\x8c\n\xd1(\x8c\x0c\xd3(\x8c'
b'\xeb\x06\x00\x01\xe4\xe4D\x00'
b'\xed\x10\xf3\xc1\xba\x0ffwDUUDwf\xf0\xab\x1c?'
b'\xef\x06\x10\r\x04\x08?\x1f'
b'\xff\x05w\x01\x00\x00\x13'
b'\xe8\x02\x00\x0e'
b'\x11\x80x'
b'\xe8\x82\x00\x0c\n'
b'\xe8\x02@\x00'
b'\xff\x05w\x01\x00\x00\x00'
b'6\x01\x00'
b':\x01f'
b')\x80\x14'
b'\xff\x05w\x01\x00\x00\x10'
b'\xe5\x02\x00\x00'
))
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_hd371, **tft_io_expander)
i2c.deinit()
BAR_WIDTH = 128
BAR_HEIGHT = 64
bitmap = displayio.Bitmap(BAR_WIDTH, 7*BAR_HEIGHT, 65535)
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=displayio.ColorConverter(input_colorspace=displayio.Colorspace.RGB565))
# 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
for i in range(BAR_WIDTH):
b = i >> 3
g = (i >> 2) << 5
r = b << 11
for j in range(BAR_HEIGHT):
bitmap[i, j] = b
bitmap[i, j+BAR_HEIGHT*1] = b|g
bitmap[i, j+BAR_HEIGHT*2] = g
bitmap[i, j+BAR_HEIGHT*3] = g|r
bitmap[i, j+BAR_HEIGHT*4] = r
bitmap[i, j+BAR_HEIGHT*5] = r|b
bitmap[i, j+BAR_HEIGHT*6] = r|g|b
# Loop forever so you can enjoy your image
while True:
time.sleep(1)
display.auto_refresh = False
group.x = random.randint(0, display.width - BAR_WIDTH)
group.y = random.randint(0, display.height - BAR_HEIGHT*7)
display.auto_refresh = True
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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