I have written a simple application in freescale kinetis TRK-KEA128 MCU for UART loop back.
I have enabled receive interrupt and in the ISR i will transmit back the recieved char.
I am using Putty to test the behaviour. Everything works fine until I switch off the board.
Later when I switch on and transmit a character via Putty, no data is written back to the Putty terminal.
What could be the reason behind it?