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Set FAST_PWM_FAN default frequency to 1KHz #23326

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Merged
thinkyhead merged 5 commits into from
Dec 21, 2021
Merged

Set FAST_PWM_FAN default frequency to 1KHz #23326

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e0665fe
Set FAST_PWM default frequency to 1KHz
descipher Dec 20, 2021
f094b9b
Fast PWM speed limit
thinkyhead Dec 21, 2021
5d8d51d
Use F_CPU on AVR, 31400 for others
thinkyhead Dec 21, 2021
88279cf
Allow for 20MHz AVR
thinkyhead Dec 21, 2021
f82e2ad
1kHz considered safest
thinkyhead Dec 21, 2021
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10 changes: 7 additions & 3 deletions Marlin/src/inc/Conditionals_post.h
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Original file line number Diff line number Diff line change
Expand Up @@ -2668,10 +2668,14 @@
#endif

/**
* FAST PWM FAN Settings
* FAST PWM FAN default PWM frequency
*/
#if ENABLED(FAST_PWM_FAN) && !defined(FAST_PWM_FAN_FREQUENCY)
#define FAST_PWM_FAN_FREQUENCY ((F_CPU) / (2 * 255 * 1)) // Fan frequency default
#if !defined(FAST_PWM_FAN_FREQUENCY) && ENABLED(FAST_PWM_FAN)
#ifdef __AVR__
#define FAST_PWM_FAN_FREQUENCY ((F_CPU) / (2 * 255 * 1))
#else
#define FAST_PWM_FAN_FREQUENCY 1000U
#endif
#endif

/**
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