An existing project runs on STM32F091, it use CMSIS USART driver (Async mode, ARM_DRIVER_USART Driver_USART1). Now I need to migrate this project to run on STM32G070. But for STM32G070, there aren't any USART driver under CMSIS driver (in keil's "manage run time environment"), except a header file for customary implementation. So what is the best way to migrate UART functionality? Do I need to implement a similar CMSIS USART driver for G0 series? (CMSIS should be easier for migration, now it seems to cause more trouble.)
So, when it is solved, remember to mark the solution on both threads.