FC_System_Timer Class Reference

Timer. More...

Inheritance diagram for FC_System_Timer:

Public Member Functions
void	Start (U32 t, TimeUnits unit)
void	Start (U32 t, TimeUnits unit, U8 event_id)
void	Stop ()
int	Sleep (int t, TimeUnits unit=TU_us)
int	WaitTimer ()

Detailed Description

Timer.

There are three ways to use the system timers. You can "Sleep", "Wait" for one timer or wait for one of many timers using the FC_System_EventManager.

// This example show how to use the Sleep functionality of the FC_System_Timer class.
// It generates a 100 us pulse every 1500 us.
 
#include "fc_io.h"
#include "fc_system.h"
 
int main()
{
//% hw_begin
    FC_IO_Clk clk(100);
    FC_IO_Out p1;
    FC_System_Timer timer;
//% hw_end
 
    for (;;)
    {
        p1 = 0x1;
        timer.Sleep(100,TU_us);
        p1 = 0x0;
        timer.Sleep(1400,TU_us);        
    }
}

// This example show how to use the Start/WaitTimer functionality of the FC_System_Timer class.
// It generates a 100 us pulse every 1500 us using a FC_IO_Pulse object.
 
#include "fc_io.h"
#include "fc_system.h"
 
int main()
{
//% hw_begin
    FC_IO_Clk clk(100);
    FC_IO_Pulse p1;
    FC_System_Timer timer;
//% hw_end
 
    timer.Start(1500, TU_us);
    for (;;)
    {
        timer.WaitTimer();
        p1.Pulse(100,TU_us);
    }
}

This example show how to wait for multiple timers using FC_System_EventManager:

// This example shows how to use FC_System_Timer, FC_System_EventManager and FC_IO_Pulse.
// Three timers are started. 
 
#include "fc_io.h"
#include "fc_system.h"
 
int main()
{
//% hw_begin
    FC_IO_Clk clk(100);
    FC_IO_Pulse p1;
    FC_IO_Pulse p2;
    FC_IO_Pulse p3(0b1);    // Inverted
    FC_System_Timer t1;
    FC_System_Timer t2;
    FC_System_Timer t3;
    FC_System_EventManager em;
//% hw_end
 
    enum EVENTS { Event1, Event2, Event3}; // Define events id
 
    t1.Start(2, TU_us, Event1);    // Event1 @ every 2 us
    t2.Start(4, TU_us, Event2);    // Event2 @ every 4 us
    t3.Start(6, TU_us, Event3);    // Event3 @ every 6 us
 
    for (;;)
    {   
        switch( em.GetEvent() ) {   // Wait for event
 
            case Event1:            // 50 Clk pulse
                p1.Pulse(50,TU_clk); 
            break;
 
            case Event2:            // 150 Clk pulse
                p2.Pulse(150,TU_clk);   
            break;
 
            case Event3:            // 150 Clk inverted pulse
                p3.Pulse(150,TU_clk);   
            break;
        }    
    }
}

This example will give the following result: