rouming / PLCModem_TDA5051AT

DC low voltage LC PLC modem based on TDA5051AT

This is DC low voltage (up to 60v) LC PLC modem based on TDA5051AT chip.
Firmware is written for STM32F103 BluePill board.  Modem PCB is designed
in such a way that BluePill can be directly pluged in using hardware
USART1 support.