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Tweak controllerFan to save a cycle or two

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This commit is contained in:
Scott Lahteine 2016-03-20 18:48:31 -07:00
parent 04a6924633
commit b1a3a95ad4
1 changed files with 9 additions and 6 deletions
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15
Marlin/Marlin_main.cpp
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@ -6986,11 +6986,11 @@ void plan_arc(
#if HAS_CONTROLLERFAN #if HAS_CONTROLLERFAN
void controllerFan() { void controllerFan() {
static millis_t lastMotor = 0; // Last time a motor was turned on static millis_t lastMotorOn = 0; // Last time a motor was turned on
static millis_t lastMotorCheck = 0; // Last time the state was checked static millis_t nextMotorCheck = 0; // Last time the state was checked
millis_t ms = millis(); millis_t ms = millis();
if (ms >= lastMotorCheck + 2500) { // Not a time critical function, so we only check every 2500ms if (ms >= nextMotorCheck) {
lastMotorCheck = ms; nextMotorCheck = ms + 2500; // Not a time critical function, so only check every 2.5s
if (X_ENABLE_READ == X_ENABLE_ON || Y_ENABLE_READ == Y_ENABLE_ON || Z_ENABLE_READ == Z_ENABLE_ON || soft_pwm_bed > 0 if (X_ENABLE_READ == X_ENABLE_ON || Y_ENABLE_READ == Y_ENABLE_ON || Z_ENABLE_READ == Z_ENABLE_ON || soft_pwm_bed > 0
|| E0_ENABLE_READ == E_ENABLE_ON // If any of the drivers are enabled... || E0_ENABLE_READ == E_ENABLE_ON // If any of the drivers are enabled...
#if EXTRUDERS > 1 #if EXTRUDERS > 1
@ -7006,9 +7006,12 @@ void plan_arc(
#endif #endif
#endif #endif
) { ) {
lastMotor = ms; //... set time to NOW so the fan will turn on lastMotorOn = ms; //... set time to NOW so the fan will turn on
} }
uint8_t speed = (lastMotor == 0 || ms >= lastMotor + ((CONTROLLERFAN_SECS) * 1000UL)) ? 0 : CONTROLLERFAN_SPEED;
// Fan off if no steppers have been enabled for CONTROLLERFAN_SECS seconds
uint8_t speed = (lastMotorOn == 0 || ms >= lastMotorOn + (CONTROLLERFAN_SECS) * 1000UL) ? 0 : CONTROLLERFAN_SPEED;
// allows digital or PWM fan output to be used (see M42 handling) // allows digital or PWM fan output to be used (see M42 handling)
digitalWrite(CONTROLLERFAN_PIN, speed); digitalWrite(CONTROLLERFAN_PIN, speed);
analogWrite(CONTROLLERFAN_PIN, speed); analogWrite(CONTROLLERFAN_PIN, speed);