STM32 QEI Library using EXTI based on mbed-QEI for STM32CubeIDE users. Below is an example of GPIO Pin configuration for ioc file:

Encoder Pin	X4 Encoding	X2 Encoding
CH_A	EXTI (Rising-Falling) with Pull-Up	EXTI (Rising-Falling) with Pull-Up
CH_B	EXTI (Rising-Falling) with Pull-Up	Input Mode / Polling with Pull-Up