User's Manual

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9 SOFTWARE USER GUIDE
 Software Architecture
 Important Function Using
 system()
SYNOPSIS
#include <stdlib.h>
int system(const char *command);
 ioctl()
SYNOPSIS
#include <sys/ioctl.h>
int ioctl(int d, int request, ...);
 UART Interface
 Baud rate setting
#include <stdlib.h>
system("gpio U 115200 "); // Set Baud rate 115200
 Read
int fd ;
unsigned char buf[1024];
fd = open(“/dev/ttyS0”, O_RDWR);
read (fd, buf,1024);
close(fd);
 Write
int fd ;
unsigned char buf[1024];
fd = open(“/dev/ttyS0”, O_RDWR |O_NONBLOCK | O_SYNC |O_NOCTTY);