6_12_天天向上_TTYUSB0_embedded&&zigbee_2

#include<stdio.h>

#include<string.h>

#include<unistd.h>

#include<fcntl.h>

#include<errno.h>

#include<termios.h>

int open_port(void)

{

        int fd;

        fd=open("/dev/ttyUSB0",O_RDWR|O_NOCTTY|O_NDELAY);

        if(fd==-1)

        {

                printf(" unable to open /dev/ttyUSB0\n");

        }

        else

        {

                printf("\nOpen serial Ok~\n");

                      fcntl(fd,F_SETFL,0);

        }

        return(fd);

}

void init_serial(int fd)

{

        struct termios options;

        tcgetattr(fd,&options);

        cfsetispeed(&options,B38400);

        cfsetospeed(&options,B38400);

        options.c_cflag|=(CLOCAL|CREAD);

        options.c_cflag&=~CSIZE;

        options.c_cflag|=CS8;

        tcsetattr(fd,TCSANOW,&options);

}

int read_data(int fd)

{

        char buffer[255];

        char *bufptr;

        int nbytes;

        bufptr=buffer;

     while((nbytes=read(fd,bufptr,buffer+sizeof(buffer)-bufptr-1))>0)

        {

        bufptr+=nbytes;

        if(bufptr[-1]=='\n'|| bufptr[-1]=='\r')

                 break;

        }

        *bufptr='\0';

        printf("\n%s\n",buffer);

        return(0);

}

int write_port(int fd)

{

        int n;

        unsigned char tmp[]={0x02,0x08,0xCB,0x01,0x00,0xD3,0x42,0x00,0x01,0x00,0x09};

        printf("in F_write_port\n");

        //n=write(fd,"hello world!\r",12);

   n=write(fd,tmp,11);

        if(n<0)

        {

                fputs("failed!\n",stderr);

        }

        else

        {

                printf("write ok\n");

        }

        return 0;

}

int main(void)

{

        int fd;

        fd=open_port();

        if(fd!=-1)

        {

           init_serial(fd);

               write_port(fd);

                //read_data(fd);

        }

        close(fd);

        return 0;

}