54 lines
1.1 KiB
C
54 lines
1.1 KiB
C
|
//
|
||
|
|
// This file is part of the GNU ARM Eclipse Plug-ins project.
|
||
|
|
// Copyright (c) 2014 Liviu Ionescu.
|
||
|
|
//
|
||
|
|
|
||
|
|
#include "Timer.h"
|
||
|
|
#include "cortexm/ExceptionHandlers.h"
|
||
|
|
|
||
|
|
// ----------------------------------------------------------------------------
|
||
|
|
|
||
|
|
// Forward declarations.
|
||
|
|
|
||
|
|
void
|
||
|
|
timer_tick (void);
|
||
|
|
|
||
|
|
// ----------------------------------------------------------------------------
|
||
|
|
|
||
|
|
volatile timer_ticks_t timer_delayCount;
|
||
|
|
|
||
|
|
// ----------------------------------------------------------------------------
|
||
|
|
|
||
|
|
void
|
||
|
|
timer_start (void)
|
||
|
|
{
|
||
|
|
// Use SysTick as reference for the delay loops.
|
||
|
|
SysTick_Config (SystemCoreClock / TIMER_FREQUENCY_HZ);
|
||
|
|
}
|
||
|
|
|
||
|
|
void
|
||
|
|
timer_sleep (timer_ticks_t ticks)
|
||
|
|
{
|
||
|
|
timer_delayCount = ticks;
|
||
|
|
|
||
|
|
// Busy wait until the SysTick decrements the counter to zero.
|
||
|
|
while (timer_delayCount != 0u)
|
||
|
|
;
|
||
|
|
}
|
||
|
|
|
||
|
|
void
|
||
|
|
timer_tick (void)
|
||
|
|
{
|
||
|
|
// Decrement to zero the counter used by the delay routine.
|
||
|
|
if (timer_delayCount != 0u)
|
||
|
|
{
|
||
|
|
--timer_delayCount;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// ----- SysTick_Handler() ----------------------------------------------------
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
// ----------------------------------------------------------------------------
|