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Account For Loop Instruction Cycles (#287)

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This commit is contained in:
Michael Miller
2019-08-30 14:03:02 -07:00
committed by GitHub
parent c71e200dd6
commit a833fb48f0
1 changed files with 7 additions and 6 deletions
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13
src/internal/NeoPixelEsp.c
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@@ -45,12 +45,13 @@ static inline uint32_t _getCycleCount(void)
return ccount;
}
#define CYCLES_800_T0H (F_CPU / 2500000) // 0.4us
#define CYCLES_800_T1H (F_CPU / 1250000) // 0.8us
#define CYCLES_800 (F_CPU / 800000) // 1.25us per bit
#define CYCLES_400_T0H (F_CPU / 2000000)
#define CYCLES_400_T1H (F_CPU / 833333)
#define CYCLES_400 (F_CPU / 400000)
#define CYCLES_LOOPTEST (4) // adjustment due to loop exit test instruction cycles
#define CYCLES_800_T0H (F_CPU / 2500000 - CYCLES_LOOPTEST) // 0.4us
#define CYCLES_800_T1H (F_CPU / 1250000 - CYCLES_LOOPTEST) // 0.8us
#define CYCLES_800 (F_CPU / 800000 - CYCLES_LOOPTEST) // 1.25us per bit
#define CYCLES_400_T0H (F_CPU / 2000000 - CYCLES_LOOPTEST)
#define CYCLES_400_T1H (F_CPU / 833333 - CYCLES_LOOPTEST)
#define CYCLES_400 (F_CPU / 400000 - CYCLES_LOOPTEST)
void ICACHE_RAM_ATTR bitbang_send_pixels_800(uint8_t* pixels, uint8_t* end, uint8_t pin)
{