Switched project to STM32F303 chip.  Added project files for STM32F303 Standard Peripheral Library using CMSIS driver layer.  Moved mavlink library into the library folder.  Began translation of ATMega2560 instructions into STM32F3 instructions.  Completed only USART1 setup.  Need to continue with remainder later.  Left TlmSync.c in root folder for reference.