Hello @liyouliu
Hope you are doing well.
You can consult the MCUXpresso SDK API Reference Manual_JN5189 (from JN5189 SDK_doc > docs), here you can find more information on peripheral functionality and their corresponding APIs; these APIs focus on the control, configuration and function of basic peripheral operation, as well as some typical use cases. You can also refer to the driver examples codes from the JN5189 SDK.
Also, Connectivity Framework Reference Manual (inside JN5189 SDK_doc > docs > wireless > Common) provides information on framework services such as Timers' Management, Keyboard, GPIO.
Regards,
Eduardo.