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Add a delay function

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This commit is contained in:
Eric Tang
2018-06-24 20:21:01 -07:00
parent 09a58b607c
commit 04f4053bde
2 changed files with 15 additions and 0 deletions
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14
right/src/timer.c
View File

@@ -3,9 +3,15 @@
static volatile uint32_t CurrentTime; static volatile uint32_t CurrentTime;
static volatile uint32_t delayLength;
void PIT_TIMER_HANDLER(void) void PIT_TIMER_HANDLER(void)
{ {
CurrentTime++; CurrentTime++;
if (delayLength) {
--delayLength;
}
PIT_ClearStatusFlags(PIT, PIT_TIMER_CHANNEL, PIT_TFLG_TIF_MASK); PIT_ClearStatusFlags(PIT, PIT_TIMER_CHANNEL, PIT_TFLG_TIF_MASK);
} }
@@ -45,3 +51,11 @@ uint32_t Timer_GetElapsedTimeAndSetCurrent(uint32_t *time)
*time = CurrentTime; *time = CurrentTime;
return elapsedTime; return elapsedTime;
} }
void Timer_Delay(uint32_t length)
{
delayLength = length;
while (delayLength) {
;
}
}

1
right/src/timer.h
View File

@@ -16,5 +16,6 @@
void Timer_SetCurrentTime(uint32_t *time); void Timer_SetCurrentTime(uint32_t *time);
uint32_t Timer_GetElapsedTime(uint32_t *time); uint32_t Timer_GetElapsedTime(uint32_t *time);
uint32_t Timer_GetElapsedTimeAndSetCurrent(uint32_t *time); uint32_t Timer_GetElapsedTimeAndSetCurrent(uint32_t *time);
void Timer_Delay(uint32_t length);
#endif #endif