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🐛 Fix Fast PWM on AVR (#25030)

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Followup to #25005
This commit is contained in:
ellensp 2022-12-05 16:38:23 +13:00 committed by Scott Lahteine
parent ecdf07f055
commit 86a10dc459
1 changed files with 5 additions and 5 deletions
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10
Marlin/src/HAL/AVR/fast_pwm.cpp
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@ -146,11 +146,11 @@ void MarlinHAL::set_pwm_frequency(const pin_t pin, const uint16_t f_desired) {
LIMIT(res_pc_temp, 1U, maxtop);
// Calculate frequencies of test prescaler and resolution values
const int f_diff = ABS(f - int(f_desired)),
f_fast_temp = (F_CPU) / (p * (1 + res_fast_temp)),
f_fast_diff = ABS(f_fast_temp - int(f_desired)),
f_pc_temp = (F_CPU) / (2 * p * res_pc_temp),
f_pc_diff = ABS(f_pc_temp - int(f_desired));
const uint16_t f_fast_temp = (F_CPU) / (p * (1 + res_fast_temp)),
f_pc_temp = (F_CPU) / (2 * p * res_pc_temp);
const int f_diff = _MAX(f, f_desired) - _MIN(f, f_desired),
f_fast_diff = _MAX(f_fast_temp, f_desired) - _MIN(f_fast_temp, f_desired),
f_pc_diff = _MAX(f_pc_temp, f_desired) - _MIN(f_pc_temp, f_desired);
if (f_fast_diff < f_diff && f_fast_diff <= f_pc_diff) { // FAST values are closest to desired f
// Set the Wave Generation Mode to FAST PWM