init

firmware/gpu_fan_ctrl.ino

@@ -0,0 +1,112 @@
+// GPU Fan Controller — Delta QFR1212GHE (4-pin PWM, 12V)
+// 6 режимов: 1=STOP, 2=STANDBY, 3=LOW, 4=MED, 5=HIGH, 6=FULL(2 мин)
+// RPM читается через тахометр (жёлтый → D2), PWM на синий → D9
+// PWM инвертирован: 0 = стоп, 99 = полная (Delta QFR1212GHE)
+// Фан не гаснет полностью — минимум 1000 (10%)
+
+const int FAN_PIN = 9;
+const int TACH_PIN = 2;
+
+volatile unsigned long tachPulses = 0;
+unsigned long lastRpm = 0;
+unsigned long lastDataTime = 0;
+
+const int MODE_STOP    = 10000;
+const int MODE_STANDBY = 8000;
+const int MODE_LOW     = 5000;
+const int MODE_MED     = 3000;
+const int MODE_HIGH    = 2500;
+const int MODE_FULL    = 0;
+const int MODE_FULL_TIME = 60000;
+
+int currentPWM = MODE_STANDBY;
+unsigned long modeFullStart = 0;
+bool inModeFull = false;
+
+char buf[16];
+
+void setup() {
+  pinMode(FAN_PIN, OUTPUT);
+  pinMode(TACH_PIN, INPUT_PULLUP);
+  attachInterrupt(digitalPinToInterrupt(TACH_PIN), tachISR, FALLING);
+  Serial.begin(115200);
+
+  // Timer1: Fast PWM, ICR1=10000, prescaler 64 → 10Hz
+  TCCR1A = _BV(COM1A1) | _BV(COM1A0) | _BV(WGM11);
+  TCCR1B = _BV(WGM12) | _BV(WGM13) | _BV(CS12);
+  ICR1 = 10000;
+  OCR1A = MODE_STANDBY;
+  lastDataTime = millis();
+  lastRpm = millis();
+  Serial.println("FAN CONTROLLER READY - modes 1-6 + RPM");
+}
+
+void tachISR() { tachPulses++; }
+
+void applyPWM(int pwm) {
+  if (pwm < MODE_FULL) pwm = MODE_FULL;
+  if (pwm > MODE_STOP) pwm = MODE_STOP;
+  OCR1A = pwm;
+  currentPWM = pwm;
+}
+
+void loop() {
+  unsigned long now = millis();
+
+  if (Serial.available()) {
+    int n = Serial.readBytesUntil('\n', buf, 15);
+    if (n > 0) {
+      buf[n] = '\0';
+      char c = buf[0];
+
+      if (c >= '1' && c <= '6') {
+        lastDataTime = now;
+        inModeFull = false;
+        modeFullStart = 0;
+
+        switch (c) {
+          case '1': applyPWM(MODE_STOP);    Serial.println("MODE: 1 STOP"); break;
+          case '2': applyPWM(MODE_STANDBY); Serial.println("MODE: 2 STANDBY"); break;
+          case '3': applyPWM(MODE_LOW);     Serial.println("MODE: 3 LOW"); break;
+          case '4': applyPWM(MODE_MED);     Serial.println("MODE: 4 MED"); break;
+          case '5': applyPWM(MODE_HIGH);    Serial.println("MODE: 5 HIGH"); break;
+          case '6':
+            applyPWM(MODE_FULL);
+            inModeFull = true;
+            modeFullStart = now;
+            Serial.println("MODE: 6 FULL (60s)");
+            break;
+        }
+      }
+
+      if (c == 'R' || c == 'r') {
+        noInterrupts();
+        unsigned long p = tachPulses;
+        tachPulses = 0;
+        interrupts();
+        Serial.print("RPM:"); Serial.println(p * 60);
+      }
+
+      if (c == 's' || c == 'S') {
+        Serial.print("PWM:"); Serial.println(currentPWM);
+        if (inModeFull) Serial.print("FULL:"); Serial.println((now - modeFullStart) / 1000);
+        Serial.print("DATA:"); Serial.println((now - lastDataTime) / 1000);
+      }
+    }
+  }
+
+  if (inModeFull && (now - modeFullStart >= MODE_FULL_TIME)) {
+    applyPWM(MODE_MED);
+    inModeFull = false;
+    Serial.println("FULL TIMEOUT -> MODE_MED");
+  }
+
+  if (now - lastRpm >= 1000) {
+    noInterrupts();
+    unsigned long p = tachPulses;
+    tachPulses = 0;
+    interrupts();
+    Serial.print("RPM:"); Serial.println(p * 60);
+    lastRpm = now;
+  }
+}