Implemented epics read/write

workspace/data/epics_test.xml

@@ -0,0 +1,224 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  uopi EPICS test panel
+  Covers: textview · gauge · barh · barv · led · multiled · setvalue · button ×3 modes · plot ×4 types
+  Signals: epics (UOPI:*) · synthetic (temp_moving_avg, temp_derivative, noise_lowpass, etc.)
+  Canvas: 1380 × 720
+-->
+<interface id="epics_test" name="EPICS Test Panel" version="1" width="1380" height="720">
+
+  <!-- ════════════════════════ SECTION LABELS ════════════════════════════ -->
+
+  <widget type="textlabel" id="lbl_monitor" x="10" y="6" w="160" h="22">
+    <option key="label" value="PROCESS VALUES"/>
+    <option key="fontSize" value="11"/>
+    <option key="color" value="#64748b"/>
+  </widget>
+
+  <widget type="textlabel" id="lbl_controls" x="10" y="302" w="120" h="22">
+    <option key="label" value="CONTROLS"/>
+    <option key="fontSize" value="11"/>
+    <option key="color" value="#64748b"/>
+  </widget>
+
+  <widget type="textlabel" id="lbl_trends" x="10" y="392" w="120" h="22">
+    <option key="label" value="TRENDS &amp; ANALYSIS"/>
+    <option key="fontSize" value="11"/>
+    <option key="color" value="#64748b"/>
+  </widget>
+
+  <!-- ════════════════════════ TEXT VIEWS ══════════════════════════════ -->
+  <!-- textview: quality dot, live value, unit from EPICS metadata       -->
+
+  <!-- Temperature: analog float, alarm chain LOW/HIGH/LOLO/HIHI -->
+  <widget type="textview" id="tv_temp" x="10" y="28" w="220" h="58">
+    <signal ds="epics" name="UOPI:TEMP"/>
+    <option key="label" value="Temperature"/>
+  </widget>
+
+  <!-- Pressure: sawtooth, different unit (bar) -->
+  <widget type="textview" id="tv_pressure" x="244" y="28" w="210" h="58">
+    <signal ds="epics" name="UOPI:PRESSURE"/>
+    <option key="label" value="Pressure"/>
+  </widget>
+
+  <!-- Flow: noisy signal, 5 Hz update -->
+  <widget type="textview" id="tv_flow" x="468" y="28" w="210" h="58">
+    <signal ds="epics" name="UOPI:FLOW"/>
+    <option key="label" value="Flow Rate"/>
+  </widget>
+
+  <!-- Counter: monotonically increasing integer -->
+  <widget type="textview" id="tv_counter" x="692" y="28" w="200" h="58">
+    <signal ds="epics" name="UOPI:COUNTER"/>
+    <option key="label" value="Event Counter"/>
+    <option key="unit" value="none"/>
+  </widget>
+
+  <!-- Message: string PV — tests string display and write -->
+  <widget type="textview" id="tv_message" x="906" y="28" w="320" h="58">
+    <signal ds="epics" name="UOPI:MESSAGE"/>
+    <option key="label" value="Operator Msg"/>
+  </widget>
+
+  <!-- ════════════════════════ GAUGES ══════════════════════════════════ -->
+  <!-- gauge: SVG arc, displays LOPR/HOPR range, alarm colour zones      -->
+
+  <!-- Temperature gauge: full alarm chain visible as colour zones -->
+  <widget type="gauge" id="g_temp" x="10" y="100" w="170" h="170">
+    <signal ds="epics" name="UOPI:TEMP"/>
+    <option key="label" value="Temperature"/>
+    <option key="min" value="0"/>
+    <option key="max" value="100"/>
+    <option key="thresholdHigh" value="78"/>
+    <option key="thresholdLow"  value="20"/>
+  </widget>
+
+  <!-- Pressure gauge -->
+  <widget type="gauge" id="g_pressure" x="194" y="100" w="150" h="150">
+    <signal ds="epics" name="UOPI:PRESSURE"/>
+    <option key="label" value="Pressure"/>
+    <option key="min" value="0"/>
+    <option key="max" value="10"/>
+    <option key="thresholdHigh" value="8"/>
+  </widget>
+
+  <!-- ════════════════════════ BAR WIDGETS ═════════════════════════════ -->
+
+  <!-- Temperature horizontal bar: full-range with setpoint reference -->
+  <widget type="barh" id="bh_temp" x="360" y="100" w="300" h="52">
+    <signal ds="epics" name="UOPI:TEMP"/>
+    <option key="label" value="Temperature"/>
+    <option key="min" value="0"/>
+    <option key="max" value="100"/>
+  </widget>
+
+  <!-- Deviation from setpoint: symmetric range, can go negative -->
+  <widget type="barh" id="bh_dev" x="360" y="166" w="300" h="52">
+    <signal ds="epics" name="UOPI:TEMP_DEVIATION"/>
+    <option key="label" value="ΔT from SP"/>
+    <option key="min" value="-60"/>
+    <option key="max" value="60"/>
+  </widget>
+
+  <!-- Flow vertical bar -->
+  <widget type="barv" id="bv_flow" x="360" y="232" w="50" h="56">
+    <signal ds="epics" name="UOPI:FLOW"/>
+    <option key="label" value="Flow"/>
+    <option key="min" value="0"/>
+    <option key="max" value="100"/>
+  </widget>
+
+  <!-- ════════════════════════ LED INDICATORS ══════════════════════════ -->
+
+  <!-- Beam On/Off LED — binary bo PV, tests ZNAM/ONAM string display -->
+  <widget type="led" id="led_beam" x="676" y="100" w="90" h="90">
+    <signal ds="epics" name="UOPI:BEAM_ON"/>
+    <option key="label" value="Beam On"/>
+    <option key="condition" value="value>0"/>
+  </widget>
+
+  <!-- Interlock LED — computed calc, MAJOR alarm when fired -->
+  <widget type="led" id="led_ilck" x="780" y="100" w="90" h="90">
+    <signal ds="epics" name="UOPI:INTERLOCK"/>
+    <option key="label" value="Interlock"/>
+    <option key="condition" value="value>0"/>
+  </widget>
+
+  <!-- ════════════════════════ MULTI-LED ═══════════════════════════════ -->
+  <!-- multiled: bitset display — STATUS_BITS is an 8-bit rotating word  -->
+
+  <widget type="multiled" id="ml_status" x="676" y="204" w="360" h="64">
+    <signal ds="epics" name="UOPI:STATUS_BITS"/>
+    <option key="label" value="Status Bits"/>
+    <option key="bits"  value="8"/>
+  </widget>
+
+  <!-- ════════════════════════ CONTROLS ════════════════════════════════ -->
+
+  <!-- Setpoint: ao PV, numeric write, unit from EPICS metadata -->
+  <widget type="setvalue" id="sv_sp" x="10" y="324" w="240" h="56">
+    <signal ds="epics" name="UOPI:SETPOINT"/>
+    <option key="label" value="Temp Setpoint"/>
+  </widget>
+
+  <!-- Mode selector: mbbo enum, write 0=Idle 1=Running 2=Fault 3=Maint -->
+  <widget type="setvalue" id="sv_mode" x="264" y="324" w="220" h="56">
+    <signal ds="epics" name="UOPI:MODE"/>
+    <option key="label" value="Mode (0–3)"/>
+    <option key="unit"  value="none"/>
+  </widget>
+
+  <!-- String write: stringout PV, freeform text -->
+  <widget type="setvalue" id="sv_msg" x="498" y="324" w="280" h="56">
+    <signal ds="epics" name="UOPI:MESSAGE"/>
+    <option key="label" value="Operator Message"/>
+    <option key="unit"  value="none"/>
+  </widget>
+
+  <!-- Button ONE-SHOT: writes 1 to RESET_CMD; IOC auto-resets after 1 s -->
+  <widget type="button" id="btn_reset" x="794" y="324" w="160" h="56">
+    <signal ds="epics" name="UOPI:RESET_CMD"/>
+    <option key="label"   value="Reset"/>
+    <option key="value"   value="1"/>
+    <option key="mode"    value="oneshot"/>
+  </widget>
+
+  <!-- Button SET-RESET: writes 1, then uopi reverts to 0 after 2 s -->
+  <widget type="button" id="btn_latch" x="968" y="324" w="200" h="56">
+    <signal ds="epics" name="UOPI:LATCH"/>
+    <option key="label"      value="Latch (2 s)"/>
+    <option key="value"      value="1"/>
+    <option key="resetValue" value="0"/>
+    <option key="resetTime"  value="2"/>
+    <option key="mode"       value="setReset"/>
+  </widget>
+
+  <!-- Button PERSISTENT: toggles BEAM_ON; stays pressed while value=1 -->
+  <widget type="button" id="btn_beam" x="1182" y="324" w="186" h="56">
+    <signal ds="epics" name="UOPI:BEAM_ON"/>
+    <option key="label"      value="Beam Enable"/>
+    <option key="value"      value="1"/>
+    <option key="resetValue" value="0"/>
+    <option key="mode"       value="persistent"/>
+  </widget>
+
+  <!-- ════════════════════════ PLOTS ═══════════════════════════════════ -->
+
+  <!-- Timeseries: TEMP + moving average + derivative (3 signals, synthetic) -->
+  <widget type="plot" id="plot_temp" x="10" y="414" w="480" h="290">
+    <signal ds="epics"     name="UOPI:TEMP"/>
+    <signal ds="synthetic" name="temp_moving_avg"/>
+    <signal ds="synthetic" name="temp_derivative"/>
+    <option key="plotType"   value="timeseries"/>
+    <option key="timeWindow" value="120"/>
+    <option key="yMin"       value="auto"/>
+    <option key="yMax"       value="auto"/>
+    <option key="legend"     value="bottom"/>
+  </widget>
+
+  <!-- Histogram: noise distribution (expect uniform 0–1) -->
+  <widget type="plot" id="plot_hist" x="504" y="414" w="290" h="290">
+    <signal ds="epics" name="UOPI:NOISE"/>
+    <option key="plotType" value="histogram"/>
+    <option key="legend"   value="none"/>
+  </widget>
+
+  <!-- Timeseries: raw noise vs lowpass filtered (synthetic) -->
+  <widget type="plot" id="plot_noise" x="808" y="414" w="380" h="290">
+    <signal ds="epics"     name="UOPI:NOISE"/>
+    <signal ds="synthetic" name="noise_lowpass"/>
+    <option key="plotType"   value="timeseries"/>
+    <option key="timeWindow" value="30"/>
+    <option key="legend"     value="bottom"/>
+  </widget>
+
+  <!-- Pressure sawtooth — bar chart (latest value per signal) -->
+  <widget type="plot" id="plot_bar" x="1202" y="414" w="166" h="290">
+    <signal ds="epics" name="UOPI:PRESSURE"/>
+    <signal ds="epics" name="UOPI:FLOW"/>
+    <option key="plotType" value="bar"/>
+    <option key="legend"   value="bottom"/>
+  </widget>
+
+</interface>

workspace/run.sh

@@ -0,0 +1,124 @@
+#!/usr/bin/env bash
+# workspace/run.sh — start softIOC + uopi for EPICS workspace testing
+#
+# Usage (from project root):
+#   bash workspace/run.sh
+#
+# Requirements:
+#   • EPICS Base installed (EPICS_BASE set, or auto-detected below)
+#   • softIoc binary available
+#   • uopi built with EPICS support (script builds it if missing)
+
+set -euo pipefail
+
+PROJECT_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+WORKSPACE="$PROJECT_ROOT/workspace"
+BINARY="$PROJECT_ROOT/dist/uopi"
+
+# ── Locate EPICS Base ─────────────────────────────────────────────────────────
+
+if [ -z "${EPICS_BASE:-}" ]; then
+    for candidate in \
+        /usr/lib/epics \
+        /usr/local/epics \
+        /opt/epics/base \
+        /opt/epics; do
+        if [ -f "$candidate/include/cadef.h" ]; then
+            export EPICS_BASE="$candidate"
+            break
+        fi
+    done
+fi
+
+if [ -z "${EPICS_BASE:-}" ]; then
+    echo "ERROR: EPICS_BASE is not set and could not be auto-detected."
+    echo "  export EPICS_BASE=/path/to/epics/base"
+    exit 1
+fi
+
+# Detect architecture
+EPICS_ARCH="${EPICS_ARCH:-$(ls "$EPICS_BASE/lib" | grep linux | head -1)}"
+if [ -z "$EPICS_ARCH" ]; then
+    EPICS_ARCH="linux-x86_64"
+fi
+
+# ── Environment ───────────────────────────────────────────────────────────────
+
+# Point CA exclusively at the local IOC — no broadcast scanning.
+export EPICS_CA_ADDR_LIST="127.0.0.1"
+export EPICS_CA_AUTO_ADDR_LIST="NO"
+
+# Ensure the EPICS shared libraries are found at runtime.
+export LD_LIBRARY_PATH="$EPICS_BASE/lib/$EPICS_ARCH${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}"
+
+# Make EPICS tools (softIoc, caget, caput…) available.
+export PATH="$EPICS_BASE/bin/$EPICS_ARCH:$PATH"
+
+# ── Locate softIoc ────────────────────────────────────────────────────────────
+
+if ! command -v softIoc &>/dev/null; then
+    echo "ERROR: softIoc not found in $EPICS_BASE/bin/$EPICS_ARCH or PATH."
+    exit 1
+fi
+
+# ── Build uopi ────────────────────────────────────────────────────────────────
+
+echo "Building uopi with EPICS support..."
+cd "$PROJECT_ROOT"
+make backend-epics 2>&1
+echo ""
+
+# ── Cleanup handler ───────────────────────────────────────────────────────────
+
+PIDS=()
+cleanup() {
+    echo ""
+    echo "Shutting down..."
+    for pid in "${PIDS[@]:-}"; do
+        kill "$pid" 2>/dev/null || true
+    done
+    wait 2>/dev/null || true
+}
+trap cleanup EXIT INT TERM
+
+# ── Kill any stale softIOC from a previous run ────────────────────────────────
+
+pkill -x softIoc 2>/dev/null || true
+# Give the OS a moment to release the CA port (5064/tcp+udp).
+sleep 0.3
+
+# ── Start softIOC ─────────────────────────────────────────────────────────────
+
+echo "Starting softIOC..."
+softIoc -S -d "$WORKSPACE/softioc/uopi_test.db" \
+    >"$WORKSPACE/softioc.log" 2>&1 &
+IOC_PID=$!
+PIDS+=("$IOC_PID")
+
+# Wait for the IOC to accept Channel Access connections (up to 10 s).
+echo -n "Waiting for IOC to be ready"
+for i in $(seq 1 20); do
+    if caget -w 1 UOPI:TICK >/dev/null 2>&1; then
+        echo " OK"
+        break
+    fi
+    echo -n "."
+    sleep 0.5
+    if [ "$i" -eq 20 ]; then
+        echo ""
+        echo "ERROR: IOC did not become ready within 10 seconds."
+        echo "Check $WORKSPACE/softioc.log for details."
+        exit 1
+    fi
+done
+
+# ── Start uopi ────────────────────────────────────────────────────────────────
+
+echo "Starting uopi (http://localhost:8080)..."
+echo "  Open the browser, switch to Edit mode, load workspace/data/epics_test.xml"
+echo "  or select it from the interface list in View mode."
+echo "  Press Ctrl-C to stop."
+echo ""
+
+cd "$PROJECT_ROOT"
+"$BINARY" -config "$WORKSPACE/uopi.toml"

workspace/softioc.log

@@ -0,0 +1,2 @@
+Starting iocInit
+iocRun: All initialization complete

workspace/softioc/st.cmd

@@ -0,0 +1,81 @@
+#!/usr/bin/env bash
+# ═══════════════════════════════════════════════════════════════════════════
+#  uopi test SoftIOC startup script
+#
+#  Prerequisites:
+#    • EPICS Base 3.15+ (for RNDM calc function)
+#    • 'softIoc' binary in PATH  (usually $EPICS_BASE/bin/$EPICS_HOST_ARCH/)
+#    • Optional: caput (from EPICS tools) to pre-fill UOPI:WAVEFORM
+#
+#  Usage:
+#    cd workspace/softioc
+#    ./st.cmd
+#
+#  Or directly (no waveform pre-fill):
+#    softIoc -s -d workspace/softioc/uopi_test.db
+# ═══════════════════════════════════════════════════════════════════════════
+
+set -euo pipefail
+cd "$(dirname "$0")"
+
+# ── Locate softIoc ────────────────────────────────────────────────────────────
+if ! command -v softIoc &>/dev/null; then
+    # Try common EPICS install paths
+    for candidate in \
+        "$EPICS_BASE/bin/$EPICS_HOST_ARCH/softIoc" \
+        /usr/local/epics/base/bin/linux-x86_64/softIoc \
+        /opt/epics/bin/linux-x86_64/softIoc; do
+        if [ -x "$candidate" ]; then
+            export PATH="$(dirname "$candidate"):$PATH"
+            break
+        fi
+    done
+fi
+
+if ! command -v softIoc &>/dev/null; then
+    echo "ERROR: softIoc not found. Set EPICS_BASE or add softIoc to PATH."
+    exit 1
+fi
+
+echo "Starting uopi test IOC…"
+echo "  PV prefix : UOPI:"
+echo "  Database  : uopi_test.db"
+echo "  softIoc   : $(command -v softIoc)"
+echo ""
+
+# ── Start IOC in background so we can run caput for waveform ─────────────────
+softIoc -s -d uopi_test.db &
+IOC_PID=$!
+
+# ── Pre-fill UOPI:WAVEFORM with a sine+DC pattern (requires caput) ───────────
+if command -v caput &>/dev/null; then
+    sleep 2   # wait for IOC to initialise Channel Access
+
+    python3 - <<'PYEOF'
+import subprocess, math
+
+n = 64
+# Sine with 3 harmonics: models a realistic ADC capture
+vals = [
+    0.5 + 0.4 * math.sin(2 * math.pi * i / n)
+        + 0.1 * math.sin(6 * math.pi * i / n)
+        + 0.05 * math.sin(10 * math.pi * i / n)
+    for i in range(n)
+]
+args = ["caput", "-a", "UOPI:WAVEFORM", str(n)] + [f"{v:.6f}" for v in vals]
+result = subprocess.run(args, capture_output=True, text=True)
+if result.returncode == 0:
+    print(f"  UOPI:WAVEFORM filled with {n}-point multi-harmonic sine.")
+else:
+    print(f"  caput failed: {result.stderr.strip()}")
+PYEOF
+else
+    echo "  (caput not found — UOPI:WAVEFORM left empty; fill manually via caput)"
+fi
+
+echo ""
+echo "IOC running (PID $IOC_PID). Connect uopi with:"
+echo "  UOPI_EPICS_CA_ADDR_LIST=127.0.0.1 ./dist/uopi -config workspace/uopi.toml"
+echo ""
+echo "Press Ctrl-C to stop."
+wait "$IOC_PID"

workspace/softioc/uopi_test.db

@@ -0,0 +1,231 @@
+# ═══════════════════════════════════════════════════════════════════════════
+#  uopi test IOC database — covers all widget types and EPICS features
+#
+#  Requirements: EPICS Base 3.15+  (uses RNDM calc function for noise)
+#  Prefix:       UOPI:
+#
+#  Run with:     softIoc -s -d uopi_test.db
+# ═══════════════════════════════════════════════════════════════════════════
+
+# ── Phase counter ────────────────────────────────────────────────────────────
+# Increments 10x/s; used as phase source for trig-based simulations.
+# At 0.1s scan, 1 step = 0.1 rad → period 2π/step·rate = 62.8 s.
+
+record(calc, "UOPI:TICK") {
+    field(DESC, "Phase counter (0.1 s)")
+    field(SCAN, ".1 second")
+    field(CALC, "A+0.1")
+    field(INPA, "UOPI:TICK NPP NMS")
+    field(VAL,  "0")
+    field(PREC, "2")
+}
+
+# ── Analog read-only signals ─────────────────────────────────────────────────
+
+# Temperature: sine 10–90 °C, 62.8 s period, full alarm chain
+# Tests: textview, gauge (color zones), barh, plot timeseries, quality dot
+record(calc, "UOPI:TEMP") {
+    field(DESC, "Simulated temperature")
+    field(SCAN, ".1 second")
+    field(CALC, "50+40*SIN(A)")
+    field(INPA, "UOPI:TICK NPP NMS")
+    field(EGU,  "degC")
+    field(PREC, "2")
+    field(LOPR, "0")
+    field(HOPR, "100")
+    field(LOW,  "20")
+    field(HIGH, "78")
+    field(LOLO, "12")
+    field(HIHI, "88")
+    field(LSV,  "MINOR")
+    field(HSV,  "MINOR")
+    field(LLSV, "MAJOR")
+    field(HHSV, "MAJOR")
+}
+
+# Pressure: sawtooth 0–10 bar, ~20 s period
+# Tests: gauge, barh, different EGU
+record(calc, "UOPI:PRESSURE") {
+    field(DESC, "Simulated pressure")
+    field(SCAN, ".5 second")
+    field(CALC, "10*((A%6.2832)/6.2832)")
+    field(INPA, "UOPI:TICK NPP NMS")
+    field(EGU,  "bar")
+    field(PREC, "3")
+    field(LOPR, "0")
+    field(HOPR, "10")
+    field(HIGH, "8")
+    field(HIHI, "9.5")
+    field(HSV,  "MINOR")
+    field(HHSV, "MAJOR")
+}
+
+# Flow rate: noisy sine 20–80 L/min, faster period (10.5 s), 5 Hz update
+# Tests: barv, different scan rate, noise in plot, textview with unit
+record(calc, "UOPI:FLOW") {
+    field(DESC, "Simulated flow rate")
+    field(SCAN, ".2 second")
+    field(CALC, "50+30*SIN(A*6)+5*RNDM")
+    field(INPA, "UOPI:TICK NPP NMS")
+    field(EGU,  "L/min")
+    field(PREC, "1")
+    field(LOPR, "0")
+    field(HOPR, "100")
+    field(LOW,  "10")
+    field(LOLO, "5")
+    field(LSV,  "MINOR")
+    field(LLSV, "MAJOR")
+}
+
+# Noise signal: pure random 0–1, 10 Hz
+# Tests: plot histogram, plot FFT, fast timeseries, synthetic lowpass
+record(calc, "UOPI:NOISE") {
+    field(DESC, "Random noise signal")
+    field(SCAN, ".1 second")
+    field(CALC, "RNDM")
+    field(PREC, "4")
+    field(LOPR, "0")
+    field(HOPR, "1")
+}
+
+# Auto-incrementing integer counter, 1 Hz
+# Tests: textview integer, plot (monotonic), different numeric type
+record(calc, "UOPI:COUNTER") {
+    field(DESC, "Event counter (1 Hz)")
+    field(SCAN, "1 second")
+    field(CALC, "A+1")
+    field(INPA, "UOPI:COUNTER NPP NMS")
+    field(VAL,  "0")
+    field(LOPR, "0")
+    field(HOPR, "100000")
+}
+
+# Temperature deviation from setpoint
+# Tests: barh with negative range, alarm on deviation, computed read-only
+record(calc, "UOPI:TEMP_DEVIATION") {
+    field(DESC, "Temp deviation from setpoint")
+    field(SCAN, "1 second")
+    field(CALC, "A-B")
+    field(INPA, "UOPI:TEMP    NPP NMS")
+    field(INPB, "UOPI:SETPOINT NPP NMS")
+    field(EGU,  "degC")
+    field(PREC, "2")
+    field(LOPR, "-60")
+    field(HOPR, "60")
+    field(HIGH, "10")
+    field(HIHI, "25")
+    field(LOW,  "-10")
+    field(LOLO, "-25")
+    field(HSV,  "MINOR")
+    field(HHSV, "MAJOR")
+    field(LSV,  "MINOR")
+    field(LLSV, "MAJOR")
+}
+
+# ── Binary / status signals ───────────────────────────────────────────────────
+
+# Interlock: fires when temperature exceeds 80 °C — MAJOR alarm
+# Tests: LED with condition, quality=bad on alarm, computed binary
+record(calc, "UOPI:INTERLOCK") {
+    field(DESC, "High-temp interlock")
+    field(SCAN, "1 second")
+    field(CALC, "A>80?1:0")
+    field(INPA, "UOPI:TEMP NPP NMS")
+    field(HIHI, "1")
+    field(HHSV, "MAJOR")
+    field(LOPR, "0")
+    field(HOPR, "1")
+}
+
+# 8-bit status word: rotating single-bit pattern every 2 s
+# Tests: Multi-LED widget (bitset display), integer signal
+record(calc, "UOPI:STATUS_BITS") {
+    field(DESC, "8-bit status word")
+    field(SCAN, "2 second")
+    field(CALC, "A>=128?(A*2-255):(A*2)")
+    field(INPA, "UOPI:STATUS_BITS NPP NMS")
+    field(VAL,  "1")
+    field(LOPR, "0")
+    field(HOPR, "255")
+}
+
+# ── Read-write signals ────────────────────────────────────────────────────────
+
+# Analog output setpoint — writable, drives UOPI:TEMP_DEVIATION
+# Tests: setvalue widget (numeric write), unit from metadata
+record(ao, "UOPI:SETPOINT") {
+    field(DESC, "Temperature setpoint")
+    field(EGU,  "degC")
+    field(PREC, "1")
+    field(LOPR, "0")
+    field(HOPR, "100")
+    field(DRVL, "0")
+    field(DRVH, "100")
+    field(VAL,  "50")
+    field(PINI, "YES")
+}
+
+# Beam enable: binary On/Off toggle
+# Tests: LED display, button (persistent mode — tracks signal state)
+record(bo, "UOPI:BEAM_ON") {
+    field(DESC, "Beam enable")
+    field(ZNAM, "Off")
+    field(ONAM, "On")
+    field(VAL,  "0")
+    field(PINI, "YES")
+}
+
+# Reset command: writes 1 and auto-reverts to 0 after 1 s (IOC-side pulse)
+# Tests: button one-shot mode — IOC handles the reset automatically
+record(bo, "UOPI:RESET_CMD") {
+    field(DESC, "Reset command (auto-clears after 1 s)")
+    field(ZNAM, "Idle")
+    field(ONAM, "Reset!")
+    field(HIGH, "1.0")
+}
+
+# Latch: plain writable binary — no auto-reset
+# Tests: button set-reset mode — uopi writes 1 then resets after delay
+record(bo, "UOPI:LATCH") {
+    field(DESC, "Latch enable")
+    field(ZNAM, "Released")
+    field(ONAM, "Latched")
+    field(VAL,  "0")
+    field(PINI, "YES")
+}
+
+# Operating mode: 4-state enum (writable)
+# Tests: setvalue (numeric write to enum), textview (shows numeric state)
+#        multi-LED style readback via setvalue, alarm state on Fault
+record(mbbo, "UOPI:MODE") {
+    field(DESC, "System operating mode")
+    field(ZRST, "Idle")
+    field(ONST, "Running")
+    field(TWST, "Fault")
+    field(THST, "Maintenance")
+    field(ZRVL, "0")
+    field(ONVL, "1")
+    field(TWVL, "2")
+    field(THVL, "3")
+    field(TWSV, "MAJOR")
+    field(THSV, "MINOR")
+    field(VAL,  "0")
+    field(PINI, "YES")
+}
+
+# String message: writable freeform text
+# Tests: setvalue with string type, textview string display
+record(stringout, "UOPI:MESSAGE") {
+    field(DESC, "Operator message (writable)")
+    field(VAL,  "System nominal")
+    field(PINI, "YES")
+}
+
+# Waveform: 128-point float array
+# Tests: plot FFT, plot histogram over array (populated at IOC start)
+record(waveform, "UOPI:WAVEFORM") {
+    field(DESC, "64-point sample waveform")
+    field(FTVL, "FLOAT")
+    field(NELM, "64")
+    field(EGU,  "counts")
+}

workspace/uopi.log

@@ -0,0 +1,4 @@
+time=2026-04-27T00:05:22.337+02:00 level=INFO msg="data source registered" name=synthetic
+time=2026-04-27T00:05:22.337+02:00 level=INFO msg="data source registered" name=epics
+time=2026-04-27T00:05:22.337+02:00 level=INFO msg=listening addr=:8080
+time=2026-04-27T00:05:24.711+02:00 level=INFO msg="shutting down"