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Don't try to enable unused auto fans 

Addressing #3743
pull/1/head
Scott Lahteine 9 years ago
parent
f13c4a9ec4
commit
4d6bb52b26
1 changed files with 8 additions and 5 deletions
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  1. 9
      Marlin/temperature.cpp

9
Marlin/temperature.cpp
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@ -332,7 +332,7 @@ int Temperature::getHeaterPower(int heater) {
#if HAS_AUTO_FAN #if HAS_AUTO_FAN
void Temperature::checkExtruderAutoFans() { 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, const int fanBit[] = { 0,
EXTRUDER_1_AUTO_FAN_PIN == EXTRUDER_0_AUTO_FAN_PIN ? 0 : 1, EXTRUDER_1_AUTO_FAN_PIN == EXTRUDER_0_AUTO_FAN_PIN ? 0 : 1,
EXTRUDER_2_AUTO_FAN_PIN == EXTRUDER_0_AUTO_FAN_PIN ? 0 : EXTRUDER_2_AUTO_FAN_PIN == EXTRUDER_0_AUTO_FAN_PIN ? 0 :
@ -347,10 +347,13 @@ int Temperature::getHeaterPower(int heater) {
SBI(fanState, fanBit[f]); SBI(fanState, fanBit[f]);
} }
for (int f = 0; f <= 3; f++) { for (int f = 0; f <= 3; f++) {
int8_t pin = fanPin[f];
if (pin >= 0) {
unsigned char newFanSpeed = TEST(fanState, f) ? EXTRUDER_AUTO_FAN_SPEED : 0; unsigned char newFanSpeed = TEST(fanState, f) ? EXTRUDER_AUTO_FAN_SPEED : 0;
// this idiom allows both digital and PWM fan outputs (see M42 handling). // this idiom allows both digital and PWM fan outputs (see M42 handling).
digitalWrite(fanPin[f], newFanSpeed); digitalWrite(pin, newFanSpeed);
analogWrite(fanPin[f], newFanSpeed); analogWrite(pin, newFanSpeed);
}
} }
} }

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