XMC4500 USIC UART stops to work if I enable fSYS to use fPLL

Hi Jesus,

Thank you for the help!

Yes, the initialization is based on XMCLib example, but it is not the same files.

You can see the files here: https://bitbucket.org/nuttx/nuttx/sr...mc4/?at=master

xmc4_clockconfig.c is the setup of the clock
xmc4_lowputc.c is the low level UART/USIC initialization
xmc4_serial.c is the serial driver that handle IRQs and read/write data to serial.

Other important file to look is configs/xmc4500-relax/include/board.h

BR,

Alan