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Set up the timer properly and introduce CurrentTime.

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László Monda
2017-11-12 17:33:23 +01:00
parent a91f945591
commit 332f2a69fa
5 changed files with 35 additions and 13 deletions
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18
right/src/timer.c
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@@ -1,18 +1,28 @@
#include "fsl_pit.h"
#include "timer.h"
uint32_t CurrentTime = 1;
void PIT_TIMER_HANDLER(void)
{
CurrentTime++;
PIT_ClearStatusFlags(PIT, PIT_TIMER_CHANNEL, PIT_TFLG_TIF_MASK);
}
void Timer_Init(void)
{
pit_config_t pitConfig;
PIT_GetDefaultConfig(&pitConfig);
PIT_Init(PIT, &pitConfig);
PIT_SetTimerPeriod(PIT, PIT_TIMER_CHANNEL, USEC_TO_COUNT(TIMER_INTERVAL_USEC, PIT_SOURCE_CLOCK));
PIT_SetTimerPeriod(PIT, PIT_TIMER_CHANNEL, MSEC_TO_COUNT(TIMER_INTERVAL_MSEC, PIT_SOURCE_CLOCK));
PIT_EnableInterrupts(PIT, PIT_TIMER_CHANNEL, kPIT_TimerInterruptEnable);
// EnableIRQ(PIT_TIMER_IRQ_ID);
EnableIRQ(PIT_TIMER_IRQ_ID);
PIT_StartTimer(PIT, PIT_TIMER_CHANNEL);
}
uint32_t Timer_GetTime(void)
uint32_t Timer_GetElapsedTime(uint32_t *time)
{
return PIT_GetCurrentTimerCount(PIT, PIT_TIMER_CHANNEL);
uint32_t elapsedTime = CurrentTime - *time;
*time = CurrentTime;
return elapsedTime;
}