I hope use it and enjoy.
I use Stm32f103vc and Keil Compiler and Stm32CubeMX wizard.
Please Do This ...
1) Enable FreeRTOS.
2) Config your usart and enable RX interrupt on CubeMX.
3) Config an input pin and a output pin.
4) Select "General peripheral Initalizion as a pair of '.c/.h' file per peripheral" on project settings.
5) Config your FingerPrintConfig.h file.
6) Add FingerPrint_RxCallBack() on usart interrupt routin.
7) call FingerPrint_Init(osPriorityLow) in your any task.
8) In R308 module must be first read datasheet. need a digital switch for power. should be connect to output pin and another input pin connect to touch detect pin.
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FingerPrint R308 6 pin Driver For Stm32 HAL library