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       ÓëÆäËûµÄ¹ØÓÚÉ豸±à³ÌµÄ·½·¨Ò»Ñù£¬ÔÚLinuxÏ£¬²Ù×÷¡¢¿ØÖÆ´®¿ÚÒ²ÊÇͨ¹ý²Ù×÷ÆðÉ豸Îļþ½øÐеġ£ÔÚLinuxÏ£¬´®¿ÚµÄÉ豸ÎļþÊÇ/dev/ttyS0»ò/dev/ttyS1µÈ¡£Òò´ËÒª¶Áд´®¿Ú£¬ÎÒÃÇÊ×ÏÈÒª´ò¿ª´®¿Ú£º
       char *dev  = "/dev/ttyS0"; //´®¿Ú1
       int    fd = open( dev, O_RDWR );
        //| O_NOCTTY | O_NDELAY      
       if (-1 == fd)   
       {                  
              perror("Can't Open Serial Port");
              return -1;       
       }    
       else 
              return fd;
      
2.         ÉèÖô®¿ÚËÙ¶È
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       int speed_arr[] = { B38400, B19200, B9600, B4800, B2400, B1200, B300,
                      B38400, B19200, B9600, B4800, B2400, B1200, B300, };
int name_arr[] = {38400,  19200,  9600,  4800,  2400,  1200,  300, 38400, 
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Logical Link Control and Adaptation Protocol(L2CAP)
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