#include <net_config.h>

void tnet_set_delay (
    U16 dly );    /* Length of time to wait. */

The tnet_set_delay function ensures that the telnet server does not call the tnet_process_cmd function until a certain time period expires. After the time interval, the telnet server can call the tnet_process_cmd function. The argument dly specifies the time period to wait, in number of timer ticks.

The tnet_set_delay function is in the RL-TCPnet library. The prototype is defined in net_config.h.

note

• For example, when monitoring an input channel, you can call the tnet_set_delay function from the tnet_process_cmd to continuously update the telnet client screen every 2 seconds. Pressing a key on the remote telnet client stops the monitoring process.

The tnet_set_delay function does not return any value.

tnet_process_cmd

typedef struct {
  U8 id;
  U8 nmax;
  U8 idx;
} MY_BUF;
#define MYBUF(p)        ((MY_BUF *)p)

U16 tnet_process_cmd (U8 *cmd, U8 *buf, U16 buflen, U32 *pvar) {
  U16 len;

  switch (MYBUF(pvar)->id) {
    case 0:
      /* On first call to this function, the value of '*pvar' is 0 */
      break;

    case 1:
      /* Display measurements triggered by command 'MEAS' */
       ..
      return (len);

    case 2:
       /* Monitor analog input ADIN0. */
       len = sprintf (buf,"ADIN0 = %d",AD_in (0));
       /* Delay a call to this function for 2 seconds (20 * 100ms). */
       tnet_set_delay (20);
       /* Request a repeated call, bit 14 is a repeat flag. */
       len |= 0x4000;
       return (len);
  }

  /* Simple Command line parser */
  if (tnet_ccmp (cmd, "ADMON") == __TRUE) {
    /* Monitor the value of ADIN0 constantly on a screen. */
    len = str_copy (buf, CLS);
    MYBUF(cmd)->id  = 2;
    return (len | 0x4000);
  }
   ..
  return (len);
}