Unify behaviour of wait on AVR (#14025)
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1 changed files with 20 additions and 2 deletions
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@ -17,8 +17,26 @@
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#include <util/delay.h>
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#define wait_ms(ms) _delay_ms(ms)
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#define wait_us(us) _delay_us(us)
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#define wait_ms(ms) \
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do { \
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if (__builtin_constant_p(ms)) { \
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_delay_ms(ms); \
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} else { \
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for (uint16_t i = ms; i > 0; i--) { \
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_delay_ms(1); \
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} \
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} \
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} while (0)
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#define wait_us(us) \
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do { \
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if (__builtin_constant_p(us)) { \
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_delay_us(us); \
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} else { \
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for (uint16_t i = us; i > 0; i--) { \
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_delay_us(1); \
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} \
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} \
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} while (0)
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/* The AVR series GPIOs have a one clock read delay for changes in the digital input signal.
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* But here's more margin to make it two clocks. */
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