succbone/succd/README.md

@@ -9,20 +9,6 @@ Features:
 2. Allows enabling/disabling the diffusion/roughing pumps (builtin controller always keeps them enabled).
 3. Allows for simulating vent/pumpdown button presses.
 
-Pins
----
-
-| P9 pin number | Relay number   | Relay board / channel number | GPIO number | Function          |
-|---------------|----------------|------------------------------|-------------|-------------------|
-| 27            | -KFA1          | 1 / 4                        | 115         | Roughing Pump     |
-| 23            | -KFA2          | 1 / 3                        | 49          | Diffusion Pump    |
-| n/c           | -KFA3 (broken) | 1 / 2                        | n/c         |                   |
-| 12            | -KFA4          | 1 / 1                        | 60          | Vent Button       |
-| 15            | -KFA5          | 2 / 4                        | 48          | Pump Down Button  |
-| 11            | -KFA6          | 2 / 3                        | 30          | Rough Vacuum Out  |
-| 42            | -KFA7          | 2 / 2                        | 7           | High Vacuum Out   |
-| n/c           | -KFA8          | 2 / 1                        | n/c         |                   |
-
 Accessing at the lab
 ---
 

succbone/succd/http.go

@@ -19,15 +19,8 @@ var (
 	//go:embed index.html
 	templateIndexText string
 	templateIndex     = template.Must(template.New("index").Parse(templateIndexText))
-	//go:embed succd.png
-	favicon []byte
 )
 
-func (d *daemon) httpFavicon(w http.ResponseWriter, r *http.Request) {
-	w.Header().Set("Content-Type", "image/png")
-	w.Write(favicon)
-}
-
 func formatVolts(v float32) string {
 	return fmt.Sprintf("%.4f V", v)
 }
@@ -106,23 +99,18 @@ func (d *daemon) httpStream(w http.ResponseWriter, r *http.Request) {
 			volts, mbar := d.pirani()
 			rp := d.rpGet()
 			dp := d.dpGet()
-			rough, high := d.vacuumStatusGet()
 			v := struct {
 				Volts     string
 				Mbar      string
 				MbarFloat float32
 				RPOn      bool
 				DPOn      bool
-				RoughReached bool
-				HighReached  bool
 			}{
 				Volts:     formatVolts(volts),
 				Mbar:      string(formatMbar(mbar)),
 				MbarFloat: mbar,
 				RPOn:      rp,
 				DPOn:      dp,
-				RoughReached: rough,
-				HighReached:  high,
 			}
 			if err := wsjson.Write(ctx, c, v); err != nil {
 				klog.Errorf("Websocket write failed: %v", err)

succbone/succd/index.html

@@ -2,7 +2,6 @@
 <meta charset="utf-8">
 <title>succd</title>
 <meta name="viewport" content="width=device-width, initial-scale=1" />
-<link rel="shortcut icon" type="image/png" href="/favicon.png">
 <style>
 body {
     font-size: 14px;
@@ -35,53 +34,32 @@ button {
     padding-left: 1.5em;
     padding-right: 1.5em;
 }
-
-td > span {
-    padding: 0.2em;
-}
-
-.logo {
-    float: left;
-    margin-right: 2em;
-}
-
-.logo > img {
-    height: 10em;
-}
 </style>
 
-<div class="logo"><img src="/favicon.png" /></div>
-
 <h1>succd</h1>
 <h2>nothing more permanent than a temporary solution</h2>
 
-<p style="margin-top: 2em; clear: both;">
+<p style="margin-top: 2em;">
 	<table>
 		<tr>
 			<th>Voltage</th>
-			<td id="volts" colspan="4">{{.volts}}</td>
+			<td id="volts">{{.volts}}</td>
 		</tr>
 		<tr>
 			<th>Pressure</th>
-			<td id="mbar" colspan="4">{{.mbar}}</td>
+			<td id="mbar">{{.mbar}}</td>
 		</tr>
 		<tr>
-            <th>Thresholds</th>
+			<th>Roughing Pump</th>
-            <td>Rough:</td>
-            <td id="trough">...</td>
-            <td>High:</td>
-            <td id="thigh">...</td>
-        </tr>
-		<tr>
-			<th>Pumps</th>
-            <td>RP:</td>
 			<td id="rp">{{ if .rp }}ON{{ else }}OFF{{ end }}</td>
-            <td>DP:</td>
+		</tr>
+		<tr>
+			<th>Diffusion Pump</th>
 			<td id="dp">{{ if .dp }}ON{{ else }}OFF{{ end }}</td>
 		</tr>
         <tr>
             <th>Evac Control</th>
-            <td colspan="4">
+            <td>
                 <button id="pd">Pump Down</button>
                 <button id="vent">Vent</button>
                 <button id="rpon">RP On</button>
@@ -92,7 +70,7 @@ td > span {
         </tr>
 		<tr>
 			<th>Status</th>
-			<td id="status" colspan="4">OK</td>
+			<td id="status">OK</td>
 		</tr>
 	</table>
 </p>
@@ -243,8 +221,6 @@ window.addEventListener("load", (_) => {
 	let volts = document.querySelector("#volts");
 	let mbar = document.querySelector("#mbar");
 	let ping = document.querySelector("#ping");
-    let trough = document.querySelector("#trough");
-    let thigh = document.querySelector("#thigh");
 
     // Buttons
 	let pd = document.querySelector("#pd");
@@ -292,22 +268,6 @@ window.addEventListener("load", (_) => {
             } else {
                 dp.style = "background-color: #f06060";
             }
-
-            let t = [];
-            if (data.RoughReached) {
-                trough.innerHTML = "OK";
-                trough.style = "background-color: #60f060";
-            } else {
-                trough.innerHTML = "NOK";
-                trough.style = "background-color: #f06060";
-            }
-            if (data.HighReached) {
-                thigh.innerHTML = "OK";
-                thigh.style = "background-color: #60f060";
-            } else {
-                thigh.innerHTML = "NOK";
-                thigh.style = "background-color: #f06060";
-            }
             historicalPush(data.MbarFloat);
 			ping.innerHTML = Date.now();
 		});

succbone/succd/main.go

@@ -2,26 +2,166 @@ package main
 
 import (
 	"context"
+	"errors"
 	"flag"
+	"fmt"
+	"math"
 	"net/http"
 	"os"
 	"os/signal"
+	"sync"
+	"time"
 
 	"k8s.io/klog"
 )
 
+// daemon is the main state of the succdaemon.
+type daemon struct {
+	// adcPirani is the adc implementation returning the voltage of the Pfeiffer
+	// Pirani gauge.
+	adcPirani adc
+
+	gpioDiffusionPump gpio
+	gpioRoughingPump  gpio
+	gpioBtnPumpDown   gpio
+	gpioBtnVent       gpio
+
+	// mu guards state variables below.
+	mu sync.RWMutex
+	// adcPiraniVolts is a moving window of read ADC values, used to calculate a
+	// moving average.
+	adcPiraniVolts []float32
+	rpOn           bool
+	dpOn           bool
+	// ventScheduled and pumpdownScheduled are timers which expire when the
+	// vent/pumpdown relays should be deactivated. This allows these outputs to
+	// be controlled momentarily.
+	ventScheduled     time.Time
+	pumpdownScheduled time.Time
+}
+
+// process runs the pain acquisition and control loop of succd.
+func (d *daemon) process(ctx context.Context) {
+	ticker := time.NewTicker(time.Millisecond * 100)
+	defer ticker.Stop()
+	for {
+		select {
+		case <-ticker.C:
+			if err := d.processOnce(ctx); err != nil {
+				if errors.Is(err, ctx.Err()) {
+					return
+				} else {
+					klog.Errorf("Processing error: %v", err)
+					time.Sleep(time.Second * 10)
+				}
+			}
+		case <-ctx.Done():
+			return
+		}
+	}
+}
+
+// processOnce runs the main loop step of succd.
+func (d *daemon) processOnce(_ context.Context) error {
+	v, err := d.adcPirani.Read()
+	if err != nil {
+		return fmt.Errorf("when reading ADC: %w", err)
+	}
+	d.mu.Lock()
+	defer d.mu.Unlock()
+	d.adcPiraniVolts = append(d.adcPiraniVolts, v)
+	trim := len(d.adcPiraniVolts) - 100
+	if trim > 0 {
+		d.adcPiraniVolts = d.adcPiraniVolts[trim:]
+	}
+	if err := d.gpioRoughingPump.set(d.rpOn); err != nil {
+		return fmt.Errorf("when configuring RP: %w", err)
+	}
+	if err := d.gpioDiffusionPump.set(!d.dpOn); err != nil {
+		return fmt.Errorf("when configuring RP: %w", err)
+	}
+	if err := d.gpioBtnPumpDown.set(!d.pumpdownScheduled.After(time.Now())); err != nil {
+		return fmt.Errorf("when configuring pumpdown: %w", err)
+	}
+	if err := d.gpioBtnVent.set(!d.ventScheduled.After(time.Now())); err != nil {
+		return fmt.Errorf("when configuring vent: %w", err)
+	}
+
+	return nil
+}
+
+// pirani returns the Pirani gauge voltage and pressure.
+func (d *daemon) pirani() (volts float32, mbar float32) {
+	d.mu.RLock()
+	volts = 0.0
+	for _, v := range d.adcPiraniVolts {
+		volts += v
+	}
+	if len(d.adcPiraniVolts) != 0 {
+		volts /= float32(len(d.adcPiraniVolts))
+	}
+	d.mu.RUnlock()
+
+	// Per Pirani probe docs.
+	bar := math.Pow(10.0, float64(volts)-8.5)
+	mbar = float32(bar * 1000.0)
+	return
+}
+
+// rpSet enables/disables the roughing pump.
+func (d *daemon) rpSet(state bool) {
+	d.mu.Lock()
+	defer d.mu.Unlock()
+	d.rpOn = state
+}
+
+// rpGet returns whether the roughing pump is enabled/disabled.
+func (d *daemon) rpGet() bool {
+	d.mu.RLock()
+	defer d.mu.RUnlock()
+	return d.rpOn
+}
+
+// dpSet enables/disables the diffusion pump.
+func (d *daemon) dpSet(state bool) {
+	d.mu.Lock()
+	defer d.mu.Unlock()
+	d.dpOn = state
+}
+
+// dpGet returns whether the diffusion pump is enabled/disabled.
+func (d *daemon) dpGet() bool {
+	d.mu.RLock()
+	defer d.mu.RUnlock()
+	return d.dpOn
+}
+
+// pumpDownPressed toggles the pump down relay for 500ms.
+func (d *daemon) pumpDownPress() {
+	d.mu.Lock()
+	defer d.mu.Unlock()
+	if d.pumpdownScheduled.Before(time.Now()) {
+		d.pumpdownScheduled = time.Now().Add(500 * time.Millisecond)
+	}
+}
+
+// ventPress toggles the vent relay for 500ms.
+func (d *daemon) ventPress() {
+	d.mu.Lock()
+	defer d.mu.Unlock()
+	if d.ventScheduled.Before(time.Now()) {
+		d.ventScheduled = time.Now().Add(500 * time.Millisecond)
+	}
+}
+
 var (
 	flagFake       bool
 	flagListenHTTP string
-	flagPressureThresholdRough = ScientificNotationValue(1e-1)
-	flagPressureThresholdHigh  = ScientificNotationValue(1e-4)
 )
 
 func main() {
 	flag.BoolVar(&flagFake, "fake", false, "Enable fake mode which allows to run succd for tests outside the succbone")
 	flag.StringVar(&flagListenHTTP, "listen_http", ":8080", "Address at which to listen for HTTP requests")
-	flag.TextVar(&flagPressureThresholdRough, "pressure_threshold_rough", &flagPressureThresholdRough, "Threshold for opening up diffusion pump (mbar)")
-	flag.TextVar(&flagPressureThresholdHigh, "pressure_threshold_high", &flagPressureThresholdHigh, "Threshold for enabling high voltage circuits (mbar)")
 	flag.Parse()
 
 	ctx, _ := signal.NotifyContext(context.Background(), os.Interrupt)
@@ -29,8 +169,6 @@ func main() {
 	d := daemon{
 		rpOn: true,
 	}
-	d.aboveRough.threshold = float64(flagPressureThresholdRough)
-	d.aboveHigh.threshold = float64(flagPressureThresholdHigh)
 	if flagFake {
 		klog.Infof("Starting with fake peripherals")
 		d.adcPirani = &fakeADC{}
@@ -38,8 +176,6 @@ func main() {
 		d.gpioDiffusionPump = &fakeGPIO{desc: "~dp"}
 		d.gpioBtnPumpDown = &fakeGPIO{desc: "~pd"}
 		d.gpioBtnVent = &fakeGPIO{desc: "~vent"}
-		d.gpioBelowRough = &fakeGPIO{desc: "~rough"}
-		d.gpioBelowHigh = &fakeGPIO{desc: "~high"}
 	} else {
 		adc, err := newBBADC(0)
 		if err != nil {
@@ -55,9 +191,8 @@ func main() {
 			{&d.gpioDiffusionPump, 49},
 			{&d.gpioBtnPumpDown, 48},
 			{&d.gpioBtnVent, 60},
-			{&d.gpioBelowRough, 30},
-			{&d.gpioBelowHigh, 7},
 		} {
+			// Relay, active low.
 			*c.out, err = newBBGPIO(c.num, true)
 			if err != nil {
 				klog.Exitf("Failed to setup GPIO: %v", err)
@@ -66,7 +201,6 @@ func main() {
 	}
 
 	http.HandleFunc("/", d.httpIndex)
-	http.HandleFunc("/favicon.png", d.httpFavicon)
 	http.HandleFunc("/stream", d.httpStream)
 	http.HandleFunc("/metrics", d.httpMetrics)
 	http.HandleFunc("/button/vent", d.httpButtonVent)

succbone/succd/process.go

@@ -1,225 +0,0 @@
-package main
-
-import (
-	"context"
-	"errors"
-	"fmt"
-	"math"
-	"sync"
-	"time"
-
-	"k8s.io/klog"
-)
-
-// daemon is the main state of the succdaemon.
-type daemon struct {
-	// adcPirani is the adc implementation returning the voltage of the Pfeiffer
-	// Pirani gauge.
-	adcPirani adc
-
-	gpioDiffusionPump gpio
-	gpioRoughingPump  gpio
-	gpioBtnPumpDown   gpio
-	gpioBtnVent       gpio
-	gpioBelowRough    gpio
-	gpioBelowHigh     gpio
-
-	// mu guards state variables below.
-	mu sync.RWMutex
-	// adcPiraniVolts is a moving window of read ADC values, used to calculate a
-	// moving average.
-	adcPiraniVolts []float32
-	rpOn           bool
-	dpOn           bool
-
-	vent       momentaryOutput
-	pumpdown   momentaryOutput
-	aboveRough thresholdOutput
-	aboveHigh  thresholdOutput
-}
-
-// momentaryOutput is an output that can be triggered for 500ms.
-type momentaryOutput struct {
-	// output of the block.
-	output bool
-	// scheduledOff is when the block should be outputting false again.
-	scheduledOff time.Time
-}
-
-func (m *momentaryOutput) process() {
-	m.output = m.scheduledOff.After(time.Now())
-}
-
-func (m *momentaryOutput) trigger() {
-	m.scheduledOff = time.Now().Add(time.Millisecond * 500)
-}
-
-// thresholdOutput outputs true if a given value is above a setpoint/threshold.
-// It contains debounce logic for processing noisy analog signals.
-type thresholdOutput struct {
-	// output of the block.
-	output bool
-	// debounce is when the debouncer should be inactive again.
-	debounce time.Time
-	// threshold is the setpoint of the block.
-	threshold float64
-}
-
-func (t *thresholdOutput) process(value float64) {
-	if time.Now().Before(t.debounce) {
-		return
-	}
-	new := value > t.threshold
-	if new != t.output {
-		t.output = new
-		t.debounce = time.Now().Add(time.Second * 5)
-	}
-}
-
-// process runs the pain acquisition and control loop of succd.
-func (d *daemon) process(ctx context.Context) {
-	ticker := time.NewTicker(time.Millisecond * 100)
-	defer ticker.Stop()
-	for {
-		select {
-		case <-ticker.C:
-			if err := d.processOnce(ctx); err != nil {
-				if errors.Is(err, ctx.Err()) {
-					return
-				} else {
-					klog.Errorf("Processing error: %v", err)
-					time.Sleep(time.Second * 10)
-				}
-			}
-		case <-ctx.Done():
-			return
-		}
-	}
-}
-
-// processOnce runs the main loop step of succd.
-func (d *daemon) processOnce(_ context.Context) error {
-	v, err := d.adcPirani.Read()
-	if err != nil {
-		return fmt.Errorf("when reading ADC: %w", err)
-	}
-	d.mu.Lock()
-	defer d.mu.Unlock()
-
-	// Process pirani ringbuffer.
-	d.adcPiraniVolts = append(d.adcPiraniVolts, v)
-	trim := len(d.adcPiraniVolts) - 100
-	if trim > 0 {
-		d.adcPiraniVolts = d.adcPiraniVolts[trim:]
-	}
-
-	d.pumpdown.process()
-	d.vent.process()
-
-	_, mbar := d.piraniUnlocked()
-	d.aboveRough.process(float64(mbar))
-	d.aboveHigh.process(float64(mbar))
-
-	// 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
-}
-
-// pirani returns the Pirani gauge voltage and pressure.
-func (d *daemon) pirani() (volts float32, mbar float32) {
-	d.mu.RLock()
-	volts, mbar = d.piraniUnlocked()
-	d.mu.RUnlock()
-	return
-}
-
-func (d *daemon) piraniUnlocked() (volts float32, mbar float32) {
-	volts = 0.0
-	for _, v := range d.adcPiraniVolts {
-		volts += v
-	}
-	if len(d.adcPiraniVolts) != 0 {
-		volts /= float32(len(d.adcPiraniVolts))
-	}
-
-	// Per Pirani probe docs.
-	bar := math.Pow(10.0, float64(volts)-8.5)
-	mbar = float32(bar * 1000.0)
-	return
-}
-
-// rpSet enables/disables the roughing pump.
-func (d *daemon) rpSet(state bool) {
-	d.mu.Lock()
-	defer d.mu.Unlock()
-	d.rpOn = state
-}
-
-// rpGet returns whether the roughing pump is enabled/disabled.
-func (d *daemon) rpGet() bool {
-	d.mu.RLock()
-	defer d.mu.RUnlock()
-	return d.rpOn
-}
-
-// dpSet enables/disables the diffusion pump.
-func (d *daemon) dpSet(state bool) {
-	d.mu.Lock()
-	defer d.mu.Unlock()
-	d.dpOn = state
-}
-
-// dpGet returns whether the diffusion pump is enabled/disabled.
-func (d *daemon) dpGet() bool {
-	d.mu.RLock()
-	defer d.mu.RUnlock()
-	return d.dpOn
-}
-
-func (d *daemon) vacuumStatusGet() (rough, high bool) {
-	d.mu.RLock()
-	defer d.mu.RUnlock()
-	rough = !d.aboveRough.output
-	high = !d.aboveHigh.output
-	return
-}
-
-// pumpDownPressed toggles the pump down relay for 500ms.
-func (d *daemon) pumpDownPress() {
-	d.mu.Lock()
-	defer d.mu.Unlock()
-	d.pumpdown.trigger()
-}
-
-// ventPress toggles the vent relay for 500ms.
-func (d *daemon) ventPress() {
-	d.mu.Lock()
-	defer d.mu.Unlock()
-	d.vent.trigger()
-}

succbone/succd/scientific.go

@@ -1,33 +0,0 @@
-package main
-
-import (
-	"fmt"
-	"strconv"
-)
-
-type ScientificNotationValue float64
-
-func (s *ScientificNotationValue) UnmarshalText(text []byte) error {
-	f, err := strconv.ParseFloat(string(text), 64)
-	if err != nil {
-		return err
-	}
-	*s = ScientificNotationValue(f)
-	return nil
-}
-
-func (s *ScientificNotationValue) MarshalText() ([]byte, error) {
-	v := float64(*s)
-	exp := 0
-	for v < 1 {
-		v *= 10
-		exp -= 1
-	}
-	for v >= 10 {
-		v /= 10
-		exp += 1
-	}
-	res := fmt.Sprintf("%.3f", v)
-	res += fmt.Sprintf("e%d", exp)
-	return []byte(res), nil
-}

succbone/succd/succd.svg

@@ -1,86 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!-- Created with Inkscape (http://www.inkscape.org/) -->
-
-<svg
-   width="256"
-   height="256"
-   viewBox="0 0 67.733332 67.733333"
-   version="1.1"
-   id="svg1"
-   xml:space="preserve"
-   inkscape:version="1.3.2 (091e20ef0f, 2023-11-25)"
-   sodipodi:docname="succd.svg"
-   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
-   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
-   xmlns="http://www.w3.org/2000/svg"
-   xmlns:svg="http://www.w3.org/2000/svg"><sodipodi:namedview
-     id="namedview1"
-     pagecolor="#ffffff"
-     bordercolor="#666666"
-     borderopacity="1.0"
-     inkscape:showpageshadow="2"
-     inkscape:pageopacity="0.0"
-     inkscape:pagecheckerboard="0"
-     inkscape:deskcolor="#d1d1d1"
-     inkscape:document-units="mm"
-     inkscape:zoom="1.8100325"
-     inkscape:cx="144.47254"
-     inkscape:cy="86.738774"
-     inkscape:window-width="2558"
-     inkscape:window-height="1418"
-     inkscape:window-x="0"
-     inkscape:window-y="20"
-     inkscape:window-maximized="1"
-     inkscape:current-layer="layer1" /><defs
-     id="defs1" /><g
-     inkscape:label="Layer 1"
-     inkscape:groupmode="layer"
-     id="layer1"><path
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