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Simply delayNano Mod Add delayCycles #387

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Simply delayNano Mod Add delayCycles #387

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4e240b0
Add delayCycles
Defragster Aug 12, 2019
47f0469
Did loop test for overhead factor -11 better
Defragster Aug 15, 2019
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8 changes: 7 additions & 1 deletion teensy4/core_pins.h
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Original file line number Diff line number Diff line change
Expand Up @@ -1464,7 +1464,13 @@ static inline void delayNanoseconds(uint32_t nsec)
while (ARM_DWT_CYCCNT - begin < cycles) ; // wait
}


static inline void delayCycles(uint32_t) __attribute__((always_inline, unused));
static inline void delayCycles(uint32_t cycles)
{ // MIN return in 7 cycles NEAR 20 cycles it gives wait +/- 2 cycles - with sketch timing overhead
uint32_t begin = ARM_DWT_CYCCNT-10; // Overhead Factor for execution
while (ARM_DWT_CYCCNT - begin < cycles) ; // wait
}

unsigned long rtc_get(void);
void rtc_set(unsigned long t);
void rtc_compensate(int adjust);
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