Test how fast doing full screen refresh is on Feather RP2040 and HX8357 480x320 FeatherWing display over SPI

displayio_hx8357_framerate_test.py

# displayio_hx8357_framerate_test.py
# 31 Jul 2022 - @todbot / Tod Kurt, from DJDevon3 full-screen spritesheet bitmap
import time
import board, digitalio, busio
import displayio, terminalio
import adafruit_hx8357 
from adafruit_display_text import label
import adafruit_imageload

sprite_fname = "Clouds_22_Spritesheet256nc_crop-0.bmp"  # only half screen, and scaled 50%
sprite_cnt = 23*1
sprite_w,sprite_h = 240,80

# sprite_fname = "Clouds_22_Spritesheet.bmp"  # full screen 100%
# sprite_cnt = 23*1
# sprite_w,sprite_h = 480,320

#sprite_sheet,sprite_palette = adafruit_imageload.load(sprite_fname)
sprite_sheet = displayio.OnDiskBitmap(open(sprite_fname, "rb"))
sprite_palette = sprite_sheet.pixel_shader
sprite = displayio.TileGrid(sprite_sheet, pixel_shader=sprite_palette,
                            width = 1, height = 1, tile_width = sprite_w, tile_height = sprite_h)

displayio.release_displays()

spi = board.SPI()

tft_cs = board.D9
tft_dc = board.D10

display_bus = displayio.FourWire(spi, command=tft_dc, chip_select=tft_cs, baudrate=40_000_000)
display = adafruit_hx8357.HX8357(display_bus, width=480, height=320)

main = displayio.Group()
display.show(main)

spriteg = displayio.Group(scale=2)
spriteg.append(sprite)
main.append(spriteg)
text_area = label.Label( terminalio.FONT, text="hi world", color=0xFFFFFF, x=8, y=25 )
main.append(text_area)

i=0
last_time=time.monotonic()
while True:
    print("hi", spi.frequency, time.monotonic() - last_time)
    last_time = time.monotonic()
    sprite[0] = i
    i = (i+1) % sprite_cnt
    display.refresh( target_frames_per_second = 30 )