forgot functions.c for last commit
forgot functions.c for last commit

Former-commit-id: cc1774253af23d00cf792fc29989ac7368de0601
VinFar/SML-Reader-STM32F0,VinFar/SML-Reader-STM32F0,VinFar/SML-Reader-STM32F0,VinFar/SML-Reader-STM32F0