Closed
Description
CircuitPython version
Adafruit CircuitPython 8.0.5 on 2023-03-31; ESP32-S3-DevKitC-1-N8R8 with ESP32S3
Board ID:espressif_esp323_devkitc_1_n8r8
UID:C7FD1A3EA8C9Code/REPL
import board
import busio
spi = busio.SPI(board.IO36, board.IO35, board.IO37)
cs = board.IO40
print(“SPI initialized.”)Behavior
Board resets to safe mode for reason: “Internal watchdog timer expired.”
Description
Also tested in 8.1.0-RC.0. I suspect that busio.SPI() is taking SPI0 used by the ESP32S3 to talk to its internal 555D flash, rather than the SPI2 or SPI3 buses that are safe for the MCU to assign.
Additional information
Defining the SPI() object in the REPL does not immediately result in an error, and commands like print(some local variable) seem to still work, but most other commands result in a watchdog reset.