Output readable hex with printf from serial port

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C

Linux

Hi all,

i try to write data from serial port to my terminal screen.
The Data will be formated and print out with the printf command

printf(" Data %x ",&c);

The programm will be correct... it shows me the hex.
But the printed hex are not correct... The hex have the wrong value.

When i try to write the raw Data to a file and read this with:

cat /dev/ttyUSB0 | xxd

the Output will be correct.

Can anyone help me?

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