Hi Julien.
I just contacted the author of an5331.Per our discussion, the code of an5331 is developed with Keil MDK. There is no easy way to import a MDK project to MCUXpresso. And we don't have MDK->MCUXpreso importer for it.
So far we don't have plan to produce a an5331 SW version for MCUXpresso either.
The fastest way to master an5331 is to get a MDK from Keil.
If you use MCUXpresso, you need do all the import work manually, It's practicable but it may cost some time.
Have a great day,
Jennie Zhang
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