succd: Migrate to KEC1 MODBUS relay board

succbone/succd/process.go

@@ -19,13 +19,6 @@ type daemon struct {
 	// Pirani gauge.
 	adcPirani adc
 
-	gpioDiffusionPump gpio
-	gpioRoughingPump  gpio
-	gpioBtnPumpDown   gpio
-	gpioBtnVent       gpio
-	gpioBelowRough    gpio
-	gpioBelowHigh     gpio
-
 	load atomic.Int64
 
 	// mu guards the state below.
@@ -171,33 +164,5 @@ func (d *daemon) processOnce(_ context.Context) error {
 		d.dpOn = false
 	}
 
-	// Update relay outputs.
-	for _, rel := range []struct {
-		name string
-		gpio gpio
-		// activeHigh means the relay is active high, ie. a true source will
-		// mean that NO/COM get connected, and a false source means that NC/COM
-		// get connected.
-		activeHigh bool
-		source     bool
-	}{
-		{"rp", d.gpioRoughingPump, false, d.rpOn},
-		{"dp", d.gpioDiffusionPump, true, d.dpOn},
-		{"pumpdown", d.gpioBtnPumpDown, true, d.pumpdown.output},
-		{"vent", d.gpioBtnVent, true, d.vent.output},
-		{"rough", d.gpioBelowRough, false, d.aboveRough.output},
-		{"high", d.gpioBelowHigh, false, d.aboveHigh.output},
-	} {
-		val := rel.source
-		if rel.activeHigh {
-			// Invert because the relays go through logical inversion (ie. a
-			// GPIO false is a relay trigger).
-			val = !val
-		}
-		if err := rel.gpio.set(val); err != nil {
-			return fmt.Errorf("when outputting %s: %w", rel.name, err)
-		}
-	}
-
 	return nil
 }