timer_tick

#include <rtl.h>

void timer_tick (void);

The timer_tick function sets the timer tick flag, which the TCPnet system uses to measure time.

The timer_tick function is in the RL-TCPnet library. The prototype is defined in rtl.h.

note

• The TCPnet system does not use any CPU timers. Hence, you must generate the timing events by periodically calling the timer_tick function, for example by using a timer interrupt function.
• Since all the TCPnet timeouts are very slow, you can also generate timer events by polling for timer overflow.
• You must configure the parameter TICK_INTERVAL in net_config.c to the period of your timer events, in milliseconds. You can set this to any value between 10 and 200.
• It is better to set TICK_INTERVAL to a higher value because low value for TICK_INTERVAL results in more frequent calls to system timer update function, which reduces the performance of the TCPnet system.

The timer_tick function does not return any value.

main_TcpNet

#include <RTL.h>

static void timer_poll () {

  if (T1IR & 1) {
    T1IR = 1;
    /* Timer tick every 100 ms */
    timer_tick ();
  }
}


void main (void) {

  init ();
  /* Initialize the TcpNet */
  init_TcpNet ();
  while (1);
    /* Poll the system tick timer */
    timer_poll ();
    /* Run main TcpNet 'thread' */
    main_TcpNet ();
     ..
  }
}