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On the 328, et al, use additional scaler steps to get more precision in the

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frame rate.
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2013-09-01 07:41:07 +00:00
parent 1cd202c3ff
commit 2d33a35a6c
1 changed files with 14 additions and 4 deletions
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lib/Charliplexing.cpp
+14 -4
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@@ -98,21 +98,31 @@ const uint8_t
slowPrescaler = _BV(CS21); // 8
# define SLOWSCALERSHIFT 3
# define FASTSCALERSHIFT 3
# elif F_CPU < CUTOFF(32)
fastPrescaler = _BV(CS21), // 8
slowPrescaler = _BV(CS21) | _BV(CS20); // 32
# define SLOWSCALERSHIFT 5
# define FASTSCALERSHIFT 2
# elif F_CPU < CUTOFF(64)
fastPrescaler = _BV(CS21), // 8
slowPrescaler = _BV(CS22); // 64
# define SLOWSCALERSHIFT 6
# define FASTSCALERSHIFT 3
# elif F_CPU < CUTOFF(128)
fastPrescaler = _BV(CS21) | _BV(CS20), // 32
slowPrescaler = _BV(CS22) | _BV(CS20); // 128
# define SLOWSCALERSHIFT 7
# define FASTSCALERSHIFT 2
# elif F_CPU < CUTOFF(256)
fastPrescaler = _BV(CS22), // 64
fastPrescaler = _BV(CS21) | _BV(CS20), // 32
slowPrescaler = _BV(CS22) | _BV(CS21); // 256
# define SLOWSCALERSHIFT 8
# define FASTSCALERSHIFT 2
# define FASTSCALERSHIFT 3
# elif F_CPU < CUTOFF(1024)
fastPrescaler = _BV(CS22) | _BV(CS21), // 256
fastPrescaler = _BV(CS22) | _BV(CS20), // 128
slowPrescaler = _BV(CS22) | _BV(CS21) | _BV(CS20); // 1024
# define SLOWSCALERSHIFT 10
# define FASTSCALERSHIFT 2
# define FASTSCALERSHIFT 3
# else
# error frame rate is too low
# endif