CircuitPython version and board name
Adafruit CircuitPython 10.2.0-alpha.1 on 2026-02-18; Adafruit QT Py ESP32S2 with ESP32S2
Code/REPL
import displayio
import bitmaptools
displayio.release_displays()
# Load the seconds hand BMP
sec_bmp = displayio.OnDiskBitmap("red_second_hand.bmp")
# Full-size canvas — affordable with PSRAM
canvas = displayio.Bitmap(240, 240, 2)
canvas_palette = displayio.Palette(2)
canvas_palette[0] = 0xFF00FF # magenta = transparent
canvas_palette[1] = 0xFF2200 # red-orange
canvas_palette.make_transparent(0)
canvas_tilegrid = displayio.TileGrid(canvas, pixel_shader=canvas_palette)
clock_with_seconds = displayio.Group()
clock_with_seconds.append(canvas_tilegrid)
bitmaptools.rotozoom(
canvas,
sec_bmp,
ox=120, # clock centre x
oy=120, # clock centre y
px=6, # pivot x: centre of 12px wide BMP
py=79, # pivot y: bottom of 80px tall BMP
angle=0,
)Behavior
causes hard fault reset:
Auto-reload is off.
Running in safe mode! Not running saved code.
You are in safe mode because:
CircuitPython core code crashed hard. Whoops!
Hard fault: memory access or instruction error.
Please file an issue with your program at github.com/adafruit/circuitpython/issues.
Press reset to exit safe mode.
Additional information
The root cause might be using OnDiskBitmap as a source for the rotozoom, I'm not sure that is allowed really.
I'll do some more testing on different device to try to confirm the cause and can work on a change to raise a more informative exception when the wrong type object is passed to rotozoom if it is from that.
CircuitPython version and board name
Code/REPL
Behavior
causes hard fault reset:
Additional information
The root cause might be using OnDiskBitmap as a source for the rotozoom, I'm not sure that is allowed really.
I'll do some more testing on different device to try to confirm the cause and can work on a change to raise a more informative exception when the wrong type object is passed to rotozoom if it is from that.