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config: use soft PWM for fans

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The hardware PWM for fan control conflicts with the speaker setup. While
this has always been an issue, sanity checks now fail because of this.

We've used soft PWM in 1.4.0 and reverted back to hardware PWM in 1.4.1,
so we probably need some additional investigation and testing here.
This commit is contained in:
Stefan Kalscheuer
2022-09-03 09:27:21 +02:00
parent 867ba6abc4
commit bd49cc3d48
1 changed files with 2 additions and 2 deletions
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4
Marlin/Configuration.h
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@@ -3837,14 +3837,14 @@
// Use software PWM to drive the fan, as for the heaters. This uses a very low frequency
// which is not as annoying as with the hardware PWM. On the other hand, if this frequency
// is too low, you should also increment SOFT_PWM_SCALE.
// #define FAN_SOFT_PWM
#define FAN_SOFT_PWM
// Incrementing this by 1 will double the software PWM frequency,
// affecting heaters, and the fan if FAN_SOFT_PWM is enabled.
// However, control resolution will be halved for each increment;
// at zero value, there are 128 effective control positions.
// :[0,1,2,3,4,5,6,7]
// #define SOFT_PWM_SCALE 2
#define SOFT_PWM_SCALE 2
// If SOFT_PWM_SCALE is set to a value higher than 0, dithering can
// be used to mitigate the associated resolution loss. If enabled,