TLC59711 driver not working with CircuitPython 7.1 on small int boards

[tomeskenazi]

The TLC59711 library example "tlc59711_simpletest.py" fails to run on Trinket M0 with CircuitPython 7.1.

This issue has been discussed on the Adafruit forum: https://forums.adafruit.com/viewtopic.php?f=60&t=186817&p=905169#p905169

2 issues have been identified:

1. Memory Allocation error
   It seems the library is too big to be loaded in memory on the Trinket M0.
   This could be fixed by shortening the library (e.g. removing the TLC59711AutoShow class if not used) and recompiling the mpy.

2. Small Int Overflow
   An OverflowError is thrown by the TLC59711 class constructor.
   It seems the driver assumes it can use 32-bit integers as the following trace suggests:
   Traceback (most recent call last):
   File "main.py", line 23, in
   File "adafruit_tlc59711.py", line 306, in init
   File "adafruit_tlc59711.py", line 315, in _init_buffer
   File "adafruit_tlc59711.py", line 438, in _chip_set_WriteCommand
   File "adafruit_tlc59711.py", line 327, in set_chipheader_bits_in_buffer
   OverflowError: small int overflow

The library was working fine with CircuitPython 3.1.1, version shipped with the Trinket M0.

[s-light]

for point 1: wold it help to just split this into multiple files? i could do this easily..

for point 2: i don't remember out of my head - i think yes it uses 32-bit integers for storing things and moving around..

what is the change between 3.1 and 7.1 that leads to not working anymore?