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—sdk:hex2serial [2017/11/23 16:16] (current) – created juraschek
Line 1: Line 1:
 +====== Hex Values over Serial ======
 +
 +This Script can be used to send non ascii strings over the serial interface. This is ussually made to talk to external devices for managment or configuration. 
 +
 +The Big diffrence is to define the non ascii String as follows
 +
 +<code c>
 +get_status="\xBF\xEF\x12\x00\x21";
 +set_power_mode="\xBF\xBC\x23\x00\x3F";
 +</code>
 +
 +and use the write() function to send them over the serial port
 +
 +  
 +===== The Script =====
 +
 +
 +<code c>
 +
 +/* Serial Baud Rate 9600, 19200, 38400, 57600, 115200 */
 +SER_SPEED=115200;
 +/*  number of data bits (5, 6, 7, 8) */
 +SER_DATABIT=8;
 +/*  number of stop bits (1, 2) */
 +SER_STOPBIT=1;
 +/* parity (0=no parity, 1=odd parity, 2=even parity) */
 +SER_PARITY=0;
 +/*  flow control (0=none, 1=xon/xoff, 2=hardware) */
 +SER_FLOW=0;
 +/*  name of the Serial Interface (Only changed if your device has more then one serial Interface (NB3710) */
 +DEV = "SERIAL1";
 +
 +rc = nb_serial_setattr(DEV, SER_SPEED, SER_DATABIT, SER_STOPBIT, SER_PARITY, SER_FLOW);
 +       if (rc != 0) {
 +        nb_syslog("ERROR: unable to set serial attributes (rc %d)", rc);
 +        return -1;
 +        }
 +
 +/* open serial port */
 +    serial_fd = nb_serial_open(DEV);
 +    if (fd < 0) {
 +        return -1;
 +    }
 +    
 +
 +
 +get_status="\xBF\xEF\x12\x00\x21";
 +set_power_mode="\xBF\xBC\x23\x00\x3F";
 +
 +data=get_status;
 +len=strlen(data);
 +        if (len > 0) {
 +            sent = write(serial_fd, data, len);
 +            if (sent != len) {
 +                nb_syslog("Unable to send message via Serial, sent: %i, len: %i",sent, len);
 +            }
 +        }
 +
 +
 +
 +
 +</code>
  

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sdk/hex2serial.txt · Last modified: 2017/11/23 16:16 by juraschek