Teensy 3.2 -> 4.0 Migration

[janczmok1970]

Hi,
i wonder what functions are critical in the 3.2 that would stop to 4.0 migration ?
Background: I hardly can get a 3.2, but 4.0 seems pin compatible.

[eagereyes]

I just built a 16n using a Teensy 4.0 and it works with basically no modifications. I just commented out all the I2C code because the i2c_t3 library doesn't exist on 4.0 and I don't need I2C anyway.

That aside, it works just fine if I set the maximum raw value in the config utility to 4090. I bet there's a setting somewhere to get higher resolution, but since we're only sending 7-bit values anyway, it doesn't matter.