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Add FAN_MAX_PWM for M106-controlled fans

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This commit is contained in:
Scott Lahteine 2018-05-15 21:14:10 -05:00
parent 2ce8047adb
commit 151201656f
3 changed files with 32 additions and 5 deletions
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17
Marlin/Conditionals_post.h
View File

@ -880,6 +880,23 @@
*/
#define HAS_FANMUX PIN_EXISTS(FANMUX0)
/**
* MIN/MAX fan PWM scaling
*/
#ifndef FAN_MIN_PWM
#define FAN_MIN_PWM 0
#endif
#ifndef FAN_MAX_PWM
#define FAN_MAX_PWM 255
#endif
#if FAN_MIN_PWM < 0 || FAN_MIN_PWM > 255
#error "FAN_MIN_PWM must be a value from 0 to 255."
#elif FAN_MAX_PWM < 0 || FAN_MAX_PWM > 255
#error "FAN_MAX_PWM must be a value from 0 to 255."
#elif FAN_MIN_PWM > FAN_MAX_PWM
#error "FAN_MIN_PWM must be less than or equal to FAN_MAX_PWM."
#endif
/**
* Bed Probe dependencies
*/

16
Marlin/Configuration_adv.h
View File

@ -208,10 +208,20 @@
// before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
//#define FAN_KICKSTART_TIME 100
// This defines the minimal speed for the main fan, run in PWM mode
// to enable uncomment and set minimal PWM speed for reliable running (1-255)
// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
/**
* PWM Fan Scaling
*
* Define the min/max speeds for PWM fans (as set with M106).
*
* With these options the M106 0-255 value range is scaled to a subset
* to ensure that the fan has enough power to spin, or to run lower
* current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
* Value 0 always turns off the fan.
*
* Define one or both of these to override the default 0-255 range.
*/
//#define FAN_MIN_PWM 50
//#define FAN_MAX_PWM 128
// @section extruder

4
Marlin/planner.cpp
View File

@ -1084,8 +1084,8 @@ void Planner::check_axes_activity() {
#endif // FAN_KICKSTART_TIME > 0
#ifdef FAN_MIN_PWM
#define CALC_FAN_SPEED(f) (tail_fan_speed[f] ? ( FAN_MIN_PWM + (tail_fan_speed[f] * (255 - FAN_MIN_PWM)) / 255 ) : 0)
#if FAN_MIN_PWM != 0 || FAN_MAX_PWM != 255
#define CALC_FAN_SPEED(f) (tail_fan_speed[f] ? map(tail_fan_speed[f], 1, 255, FAN_MIN_PWM, FAN_MAX_PWM) : 0)
#else
#define CALC_FAN_SPEED(f) tail_fan_speed[f]
#endif