It will work only on little endian machines.
Fix clang warning
pn53x-tamashell.c:163:40: warning: cast from 'uint8_t *' (aka 'unsigned char *')
to 'unsigned int *' increases required alignment from 1 to 4
[-Wcast-align]
size = sscanf(cmd+offset, "%2x", (unsigned int*)&byte);
^~~~~~~~~~~~~~~~~~~~