I want to receive serial data from PC, sent via COPY command via serial, like COPY asdf.txt > COM1 to MCU and write it to I2C eeprom.
So for this I need a loop with SERIN2, which will receive 1 byte and write it to EEPROM. But how to force serin2 wait indefinitely, until the transfer starts, and furthermore, force it to stop, when transfer ends?