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@wildestpixel
Created February 12, 2021 18:00
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Pico Explorer Circuitpython display with temperature sensor
import board
import busio
import time
import terminalio
import displayio
from adafruit_display_text import label
from adafruit_st7789 import ST7789
import adafruit_pct2075
i2c = busio.I2C(board.GP21, board.GP20)
pct = adafruit_pct2075.PCT2075(i2c)
# First set some parameters used for shapes and text
BORDER = 10
FONTSCALE = 2
BACKGROUND_COLOR = 0x00FF00 # Bright Green
FOREGROUND_COLOR = 0xAA0088 # Purple
TEXT_COLOR = 0xFFFF00
# Release any resources currently in use for the displays
displayio.release_displays()
tft_cs = board.GP17
tft_dc = board.GP16
spi_mosi = board.GP19
spi_clk = board.GP18
spi = busio.SPI(spi_clk, spi_mosi)
display_bus = displayio.FourWire(spi, command=tft_dc, chip_select=tft_cs)
display = ST7789(
display_bus, rotation=180, width=240, height=240, rowstart=80
)
# Make the display context
splash = displayio.Group(max_size=10)
display.show(splash)
color_bitmap = displayio.Bitmap(display.width, display.height, 1)
color_palette = displayio.Palette(1)
color_palette[0] = BACKGROUND_COLOR
bg_sprite = displayio.TileGrid(color_bitmap, pixel_shader=color_palette, x=0, y=0)
splash.append(bg_sprite)
# Draw a smaller inner rectangle
inner_bitmap = displayio.Bitmap(
display.width - BORDER * 2, display.height - BORDER * 2, 1
)
inner_palette = displayio.Palette(1)
inner_palette[0] = FOREGROUND_COLOR
inner_sprite = displayio.TileGrid(
inner_bitmap, pixel_shader=inner_palette, x=BORDER, y=BORDER
)
splash.append(inner_sprite)
# Draw a label
text = "Temperature"
text_area = label.Label(terminalio.FONT, text=text, color=TEXT_COLOR)
text_width = text_area.bounding_box[2] * FONTSCALE
text_group = displayio.Group(
max_size=10,
scale=FONTSCALE,
x=display.width // 2 - text_width // 2,
y=(display.height // 2) - 15,
)
text_group.append(text_area) # Subgroup for text scaling
text1 = "%.2f C" % pct.temperature
text_area1 = label.Label(terminalio.FONT, text=text1, color=TEXT_COLOR)
text_width1 = text_area1.bounding_box[2] * FONTSCALE
text_group1 = displayio.Group(
max_size=10,
scale=FONTSCALE,
x=display.width // 2 - text_width1 // 2,
y=(display.height // 2) + 15,
)
text_group1.append(text_area1) # Subgroup for text scaling
splash.append(text_group)
splash.append(text_group1)
while True:
text_area1.text = "%.2f C" % pct.temperature
time.sleep(1)
pass
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