How to compile with wiringPi librarys
# gcc -o [output file name] [c file name] -lwiringPi -lwiringPiDev -lpthread
Display mode change : BT1/BT2
Mode State : Date&Time ↔ IP Addr ↔ Temp ↔ Governor ↔ Big Freq ↔ Little Freq
Full Source code : lcd_cpuInfo.c