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Don't try to enable unused auto fans

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Addressing #3743
This commit is contained in:
Scott Lahteine 2016-05-14 14:46:14 -07:00
parent f13c4a9ec4
commit 4d6bb52b26
1 changed files with 8 additions and 5 deletions
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13
Marlin/temperature.cpp
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@ -332,7 +332,7 @@ int Temperature::getHeaterPower(int heater) {
#if HAS_AUTO_FAN
void Temperature::checkExtruderAutoFans() {
const uint8_t fanPin[] = { EXTRUDER_0_AUTO_FAN_PIN, EXTRUDER_1_AUTO_FAN_PIN, EXTRUDER_2_AUTO_FAN_PIN, EXTRUDER_3_AUTO_FAN_PIN };
const int8_t fanPin[] = { EXTRUDER_0_AUTO_FAN_PIN, EXTRUDER_1_AUTO_FAN_PIN, EXTRUDER_2_AUTO_FAN_PIN, EXTRUDER_3_AUTO_FAN_PIN };
const int fanBit[] = { 0,
EXTRUDER_1_AUTO_FAN_PIN == EXTRUDER_0_AUTO_FAN_PIN ? 0 : 1,
EXTRUDER_2_AUTO_FAN_PIN == EXTRUDER_0_AUTO_FAN_PIN ? 0 :
@ -347,10 +347,13 @@ int Temperature::getHeaterPower(int heater) {
SBI(fanState, fanBit[f]);
}
for (int f = 0; f <= 3; f++) {
unsigned char newFanSpeed = TEST(fanState, f) ? EXTRUDER_AUTO_FAN_SPEED : 0;
// this idiom allows both digital and PWM fan outputs (see M42 handling).
digitalWrite(fanPin[f], newFanSpeed);
analogWrite(fanPin[f], newFanSpeed);
int8_t pin = fanPin[f];
if (pin >= 0) {
unsigned char newFanSpeed = TEST(fanState, f) ? EXTRUDER_AUTO_FAN_SPEED : 0;
// this idiom allows both digital and PWM fan outputs (see M42 handling).
digitalWrite(pin, newFanSpeed);
analogWrite(pin, newFanSpeed);
}
}
}