arduino~snprintf

#include <stdio.h>

printf, fprintf, sprintf, snprintf, vprintf, vfprintf, vsprintf, vsnprintf - formatted output conversion

http://linux.die.net/man/3/sprintf

 

 

http://electronics.stackexchange.com/questions/49662/arduino-why-does-serial-printlnint-hex-display-4-bytes

http://www.cplusplus.com/reference/cstdio/sprintf/

http://www.cplusplus.com/reference/cstdio/printf/

 

 

printf输出u32/u64的格式(sprintf类似)

%llu   是64位无符号 
%llx才是64位16进制数