Merge remote-tracking branch 'origin/codex/trend-display-scale' into HEAD

2026-09-05 11:43:08 +03:00
parent 235d5d81a2 59f847e900
commit 27ef6fcfdf
31 changed files with 972 additions and 38 deletions
--- a/README.md
+++ b/README.md
@@ -13,6 +13,7 @@
 templates/
  c/        библиотеки на C99: заголовок, реализация, README, где есть — порт и тесты
  python/   модули на чистом Python 3.9+, только stdlib
+  tools/    общие инструменты сборки и выпуска прошивок
 ```

 Пошаговая раскладка нового проекта и выбор портов для STM32F103, STM32G431
@@ -48,6 +49,12 @@ templates/
 | [`python/protocan`](python/protocan) | разбор ProtoCAN, транспортный кадр моста, кадр SETGUI, кодеки каталога | stdlib, Python 3.9+ |
 | [`python/protocan/trends.py`](python/protocan/trends.py) | общие настройки графиков, ограниченная история, ctypes-декодер GAS/raw CAN | stdlib, опционально SETProtocol DLL/SO |

+### Инструменты
+
+| Инструмент | Что делает |
+|---|---|
+| [`tools/firmware-publish`](tools/firmware-publish) | единый BAT и конфигурации для проверки и публикации `.hex` Keil / `.bin` CCS 12 в каталоге SETGUI |
+
 Общие тренды для Android GUI и SETGUI: [формат JSON, C99-ядро и адаптеры](c/set-protocol/docs/GUI_TRENDS.md).
 Общие масштабирование и маркеры: [C99, JNI и Python/Qt](c/set-protocol/docs/GUI_PLOT.md).

--- a/c/set-protocol/docs/GUI_PLOT.md
+++ b/c/set-protocol/docs/GUI_PLOT.md
@@ -3,7 +3,8 @@
 Численная логика находится в `include/set_plot.h` и `src/set_plot.c`.
 Это модуль C99 без Qt, Android, транспорта, динамической памяти и глобального
 состояния. Он собирается в существующую библиотеку SETProtocol; отдельная DLL
-для графиков не требуется. Версия ABI графиков — `set_plot_abi_version() == 1`.
+для графиков не требуется. Версия ABI графиков — `set_plot_abi_version() == 1`;
+новые операции добавляются без изменения существующих значений и сигнатур.

 | Общее в templates | Адаптер приложения |
 |---|---|
@@ -13,6 +14,7 @@
 | Перевод значения в долю экрана и обратно, инверсия Y | Canvas/QPainter и оформление шкал |
 | Перемещение маркера от начальной координаты, ограничение видимой областью | Захват линии пальцем/мышью, редактор положения |
 | Разность B−A, D−C и множитель единиц, шаги шкалы 1/2/5 | Подписи, цвета, миллисекунды/герцы/единицы сигнала |
+| Проверка абсолютных границ X/Y для фиксации осей | Диалог ввода и хранение отдельных границ времени/FFT |
 | Модели маркеров и их размещение в Kotlin/Python-портах | Жизненный цикл экрана, очистка и выбор источника |

 Модель маркеров: A/B — координаты X и вертикальные линии во всю высоту поля;
@@ -59,8 +61,9 @@ SETGUI: `ui/plot_interaction.py` адаптирует общий модуль к
 используются исходные метки приёма. Дискретные дорожки имеют общую X-шкалу,
 а маркеры уровня Y относятся к аналоговому полю.

-Расчёт FFT не является частью этого модуля. Android вычисляет спектр через
-`set_spectrum.c`; вкладка спектра SETGUI получает готовые уровни в дБмВ от
+Расчёт FFT не является частью этого модуля. Android и SETGUI вычисляют спектр через
+`set_spectrum.c`; там же находится общий поиск доминирующего узкополосного пика,
+а трёхсекундный таймер его отображения остаётся состоянием GUI. Вкладка спектра SETGUI получает готовые уровни в дБмВ от
 прибора. Общая интерактивная часть не меняет эти данные или единицы.

 ## Проверка и сборка
--- a/c/set-protocol/docs/GUI_TRENDS.md
+++ b/c/set-protocol/docs/GUI_TRENDS.md
@@ -12,7 +12,7 @@
 | `include/set_trends.h`, `src/set_trends.c` | C99: фильтрация GAS/raw CAN, signed/unsigned word, payload подписки SET GUI; использует `pcan_id` и ABI export macro |
 | `ports/android/kotlin/ru/setcorp/setprotocol/trends/` | Модель, валидация JSON, ограниченная история, GAS_WATCH; JVM + org.json, без Android/Compose |
 | `ports/android/setprotocol_jni.c` | Только преобразование JNI-аргументов |
-| `python/protocan/trends.py` | Модель, JSON, история и `NativeTrends`; Python 3.9+, stdlib, без Qt |
+| `python/protocan/trends.py` | Модель, JSON, история и `NativeTrends` (word/CAN/GAS request/ack/data); Python 3.9+, stdlib, без Qt |
 | `tests/fixtures/trends-v1.json` | Один образец для тестов обоих GUI и обмена настройками |

 ## Формат файла
@@ -44,6 +44,8 @@ UTF-8 JSON: `format = "setflash-trends"`, `version = 1`, `profiles` — слов

 CAN — пассивный приём, без записи GAS и автоматической отправки запросов.
 GAS принимает только входящие FROM_DEVICE; TX/RTR/ошибки исключены.
+Полный `GAS_WATCH_DATA`, включая 32-битную метку прибора, разбирается функцией
+`set_trend_watch_decode`; UI не знает смещений полей и endian.
 SET GUI оформляет подписку в порядке адресов. ACK должен подтвердить весь
 список: при частичном принятии нельзя определить пропущенные адреса, поэтому
 строить график по смещённым индексам запрещено. При паузе порт приложения
--- a/c/set-protocol/include/set_plot.h
+++ b/c/set-protocol/include/set_plot.h
@@ -17,10 +17,11 @@ enum set_plot_operation {
    SET_PLOT_DRAG = 4,      /* initial,deltaPixels,length,low,high,inverted -> clamped value */
    SET_PLOT_TICK_STEP = 5, /* range,lengthPixels -> nice step */
    SET_PLOT_DELTA = 6,     /* A,B,multiplier -> (B-A)*multiplier */
-    SET_PLOT_DB_DELTA = 7   /* A,B -> 20*log10(abs(B/A)); zero is invalid */
+    SET_PLOT_DB_DELTA = 7,  /* A,B -> 20*log10(abs(B/A)); zero is invalid */
+    SET_PLOT_LIMITS = 8     /* xMin,xMax,yMin,yMax -> validated unchanged limits */
 };

-/** Version of this plot ABI, independently of the transport ABI. */
+/** Version of this additive plot ABI, independently of the transport ABI. */
 PCAN_ABI_API uint32_t set_plot_abi_version(void);
 /** Evaluates one operation. Returns output count, or 0 for invalid arguments.
 * TRANSFORM rejects malformed viewports; invalid gesture values return the
--- a/c/set-protocol/include/set_spectrum.h
+++ b/c/set-protocol/include/set_spectrum.h
@@ -28,6 +28,15 @@ PCAN_ABI_API int set_spectrum_analyze(const double *times, const double *values,
    size_t max_size, int window, int filter, double low_hz, double high_hz, int remove_mean,
    double *amplitudes, size_t capacity, double *meta);

+/** Find the strongest non-DC local maximum above both the absolute floor and
+ * relative_threshold * median(non-DC amplitudes). The caller supplies scratch
+ * storage of at least count-1 doubles. peak = {frequency_hz, amplitude}.
+ * Returns 1 when found, 0 when no narrow-band peak exists, -1 on invalid input.
+ */
+PCAN_ABI_API int set_spectrum_dominant_peak(const double *amplitudes, size_t count,
+    double bin_hz, double relative_threshold, double absolute_floor,
+    double *scratch, size_t scratch_capacity, double *peak, size_t peak_capacity);
+
 #ifdef __cplusplus
 }
 #endif
--- a/c/set-protocol/include/set_trends.h
+++ b/c/set-protocol/include/set_trends.h
@@ -48,6 +48,13 @@ PCAN_ABI_API int set_trend_watch_ack(
 PCAN_ABI_API int set_trend_watch_values(
    const uint8_t *payload, size_t size, uint16_t *words, size_t capacity);

+/** Decode the complete GAS_WATCH_DATA payload including its device timestamp.
+ * This is the preferred ABI for GUI ports; the older values-only symbol remains
+ * available for binary compatibility.
+ */
+PCAN_ABI_API int set_trend_watch_decode(const uint8_t *payload, size_t size,
+    uint32_t *timestamp_ms, uint16_t *words, size_t capacity);
+
 #ifdef __cplusplus
 }
 #endif
--- a/c/set-protocol/ports/android/kotlin/ru/setcorp/setprotocol/NativeSetProtocol.kt
+++ b/c/set-protocol/ports/android/kotlin/ru/setcorp/setprotocol/NativeSetProtocol.kt
@@ -16,12 +16,18 @@ object NativeSetProtocol {
    /** {status, N, Fs, jitter, amplitudes...}; status != 0 has no amplitudes. */
    external fun nativeSpectrum(times: DoubleArray, values: DoubleArray, maxSize: Int,
        window: Int, filter: Int, lowHz: Double, highHz: Double, removeMean: Boolean): DoubleArray?
+    /** {frequencyHz, amplitude}, empty when no narrow-band peak is present. */
+    external fun nativeSpectrumPeak(amplitudes: DoubleArray, binHz: Double,
+        relativeThreshold: Double, absoluteFloor: Double): DoubleArray?
    external fun nativeTrendCanValue(
        source: Int, address: Long, deviceType: Int, device: Int, byteOffset: Int,
        extended: Boolean, signed: Boolean, canId: Long, flags: Int, input: ByteArray,
    ): Int
    external fun nativeTrendWatchRequest(period: Int, addresses: IntArray): ByteArray?
+    external fun nativeTrendWatchAck(input: ByteArray, period: Int, count: Int): Boolean
    external fun nativeTrendWatchValues(input: ByteArray): IntArray?
+    /** {unsigned timestampMs, word0, ...}. */
+    external fun nativeTrendWatchDecode(input: ByteArray): LongArray?
    external fun nativePackId(
        priority: Int,
        route: Int,
--- a/c/set-protocol/ports/android/kotlin/ru/setcorp/setprotocol/trends/GuiGasWatch.kt
+++ b/c/set-protocol/ports/android/kotlin/ru/setcorp/setprotocol/trends/GuiGasWatch.kt
@@ -10,37 +10,28 @@ object GuiGasWatch {

    fun request(periodMs: Int, addresses: List<Int>): ByteArray {
        require(periodMs in 0..65535 && addresses.size <= 64 && addresses.all { it in 0..65535 })
-        if (NativeSetProtocol.available) return requireNotNull(NativeSetProtocol.nativeTrendWatchRequest(periodMs, addresses.toIntArray()))
-        return ByteArray(4 + addresses.size * 2).also { output ->
-            put16(output, 0, periodMs)
-            put16(output, 2, addresses.size)
-            addresses.forEachIndexed { index, address -> put16(output, 4 + index * 2, address) }
-        }
+        check(NativeSetProtocol.available) { "Общая библиотека SETProtocol недоступна" }
+        return requireNotNull(NativeSetProtocol.nativeTrendWatchRequest(periodMs, addresses.toIntArray()))
    }

    fun validateAck(payload: ByteArray, periodMs: Int, count: Int) {
-        require(payload.size == 4 && read16(payload, 0) == periodMs && read16(payload, 2) == count) {
+        require(NativeSetProtocol.available && NativeSetProtocol.nativeTrendWatchAck(payload, periodMs, count)) {
            "Прибор принял не все адреса GAS. Проверьте карту регистров; отображение по неполной подписке невозможно"
        }
    }

    fun values(payload: ByteArray, expectedCount: Int): List<Int> {
-        val values = if (NativeSetProtocol.available) {
-            requireNotNull(NativeSetProtocol.nativeTrendWatchValues(payload)) { "Повреждён GAS_WATCH_DATA" }.toList()
-        } else {
-            require(payload.size >= 6) { "GAS_WATCH_DATA короче заголовка" }
-            val count = read16(payload, 4)
-            require(count <= 64 && payload.size == 6 + count * 2) { "Неверная длина GAS_WATCH_DATA" }
-            List(count) { read16(payload, 6 + it * 2) }
-        }
+        check(NativeSetProtocol.available) { "Общая библиотека SETProtocol недоступна" }
+        val values = requireNotNull(NativeSetProtocol.nativeTrendWatchValues(payload)) { "Повреждён GAS_WATCH_DATA" }.toList()
        require(values.size == expectedCount) { "Число значений GAS не соответствует подписке" }
        return values
    }

-    private fun read16(data: ByteArray, offset: Int): Int =
-        (data[offset].toInt() and 0xFF) or ((data[offset + 1].toInt() and 0xFF) shl 8)
-    private fun put16(data: ByteArray, offset: Int, value: Int) {
-        data[offset] = value.toByte()
-        data[offset + 1] = (value ushr 8).toByte()
+    data class Sample(val timestampMs: Long, val values: List<Int>)
+    fun decode(payload: ByteArray, expectedCount: Int): Sample {
+        check(NativeSetProtocol.available) { "Общая библиотека SETProtocol недоступна" }
+        val decoded = requireNotNull(NativeSetProtocol.nativeTrendWatchDecode(payload)) { "Повреждён GAS_WATCH_DATA" }
+        require(decoded.size == expectedCount + 1) { "Число значений GAS не соответствует подписке" }
+        return Sample(decoded[0], decoded.drop(1).map(Long::toInt))
    }
 }
--- a/c/set-protocol/ports/android/kotlin/ru/setcorp/setprotocol/trends/NativePlot.kt
+++ b/c/set-protocol/ports/android/kotlin/ru/setcorp/setprotocol/trends/NativePlot.kt
@@ -32,3 +32,10 @@ fun plotTickStep(range: Double, pixels: Double): Double = NativePlot.call(5, ran
 fun plotDelta(a: Double, b: Double, multiplier: Double = 1.0): Double = NativePlot.call(6, a, b, multiplier)[0]
 fun plotDbDelta(a: Double, b: Double): Double? =
    runCatching { NativePlot.call(7, a, b)[0] }.getOrNull()
+
+data class PlotLimits(val xMin: Double, val xMax: Double, val yMin: Double, val yMax: Double) {
+    fun validated(): PlotLimits {
+        val values = NativePlot.call(8, xMin, xMax, yMin, yMax)
+        return PlotLimits(values[0], values[1], values[2], values[3])
+    }
+}
--- a/c/set-protocol/ports/android/kotlin/ru/setcorp/setprotocol/trends/TrendSpectrum.kt
+++ b/c/set-protocol/ports/android/kotlin/ru/setcorp/setprotocol/trends/TrendSpectrum.kt
@@ -34,6 +34,8 @@ data class TrendSpectrum(
    val binHz: Double get() = if (size > 0) sampleRate / size else 0.0
 }

+data class SpectrumPeak(val frequencyHz: Double, val amplitude: Double)
+
 /** Math is implemented once in C and used unchanged by JNI and ctypes. */
 object SpectrumAnalyzer {
    fun analyze(points: List<TrendPoint>, options: SpectrumOptions): TrendSpectrum {
@@ -64,4 +66,12 @@ object SpectrumAnalyzer {
        return TrendSpectrum(output[1].toInt(), output[2], output[3],
            if (error == null) output.drop(4) else emptyList(), error)
    }
+
+    fun dominantPeak(spectrum: TrendSpectrum, relativeThreshold: Double = 3.0,
+                     absoluteFloor: Double = 1e-6): SpectrumPeak? {
+        if (spectrum.error != null || spectrum.size <= 0 || spectrum.amplitudes.size < 3) return null
+        val result = NativeSetProtocol.nativeSpectrumPeak(spectrum.amplitudes.toDoubleArray(),
+            spectrum.binHz, relativeThreshold, absoluteFloor) ?: return null
+        return result.takeIf { it.size == 2 }?.let { SpectrumPeak(it[0], it[1]) }
+    }
 }
--- a/c/set-protocol/ports/android/setprotocol_jni.c
+++ b/c/set-protocol/ports/android/setprotocol_jni.c
@@ -367,6 +367,30 @@ Java_ru_setcorp_setprotocol_NativeSetProtocol_nativeTrendCanValue(
        (uint8_t)flags, (const uint8_t *)data, (size_t)size);
 }

+JNIEXPORT jdoubleArray JNICALL
+Java_ru_setcorp_setprotocol_NativeSetProtocol_nativeSpectrumPeak(
+    JNIEnv *env, jobject self, jdoubleArray input, jdouble bin_hz,
+    jdouble relative_threshold, jdouble absolute_floor)
+{
+    (void)self;
+    jsize count = input == NULL ? 0 : (*env)->GetArrayLength(env, input);
+    if (count < 3 || count > (jsize)(SET_SPECTRUM_MAX / 2U + 1U)) return NULL;
+    double *buffer = (double *)malloc(sizeof(double) * (size_t)(count * 2 - 1));
+    if (buffer == NULL) return NULL;
+    double *amplitudes = buffer, *scratch = buffer + count, peak[2];
+    (*env)->GetDoubleArrayRegion(env, input, 0, count, amplitudes);
+    int status = (*env)->ExceptionCheck(env) ? -1 : set_spectrum_dominant_peak(
+        amplitudes, (size_t)count, bin_hz, relative_threshold, absolute_floor,
+        scratch, (size_t)count - 1U, peak, 2U);
+    jdoubleArray result = NULL;
+    if (status >= 0) {
+        result = (*env)->NewDoubleArray(env, status == 1 ? 2 : 0);
+        if (result != NULL && status == 1) (*env)->SetDoubleArrayRegion(env, result, 0, 2, peak);
+    }
+    free(buffer);
+    return result;
+}
+
 JNIEXPORT jbyteArray JNICALL
 Java_ru_setcorp_setprotocol_NativeSetProtocol_nativeTrendWatchRequest(
    JNIEnv *env, jobject self, jint period, jintArray input)
@@ -389,6 +413,20 @@ Java_ru_setcorp_setprotocol_NativeSetProtocol_nativeTrendWatchRequest(
    return result;
 }

+JNIEXPORT jboolean JNICALL
+Java_ru_setcorp_setprotocol_NativeSetProtocol_nativeTrendWatchAck(
+    JNIEnv *env, jobject self, jbyteArray input, jint period, jint count)
+{
+    (void)self;
+    if (input == NULL || period < 0 || period > 65535 || count < 0) return JNI_FALSE;
+    jsize size = (*env)->GetArrayLength(env, input);
+    if (size != 4) return JNI_FALSE;
+    jbyte payload[4];
+    (*env)->GetByteArrayRegion(env, input, 0, size, payload);
+    return set_trend_watch_ack((const uint8_t *)payload, (size_t)size,
+        (uint16_t)period, (size_t)count) ? JNI_TRUE : JNI_FALSE;
+}
+
 JNIEXPORT jintArray JNICALL
 Java_ru_setcorp_setprotocol_NativeSetProtocol_nativeTrendWatchValues(
    JNIEnv *env, jobject self, jbyteArray input)
@@ -408,6 +446,28 @@ Java_ru_setcorp_setprotocol_NativeSetProtocol_nativeTrendWatchValues(
    return result;
 }

+JNIEXPORT jlongArray JNICALL
+Java_ru_setcorp_setprotocol_NativeSetProtocol_nativeTrendWatchDecode(
+    JNIEnv *env, jobject self, jbyteArray input)
+{
+    (void)self;
+    jsize size = input == NULL ? 0 : (*env)->GetArrayLength(env, input);
+    if (size < 6 || size > (jsize)(6U + 2U * SET_TREND_WATCH_MAX)) return NULL;
+    jbyte payload[6U + 2U * SET_TREND_WATCH_MAX];
+    uint16_t words[SET_TREND_WATCH_MAX];
+    uint32_t timestamp = 0U;
+    jlong values[1U + SET_TREND_WATCH_MAX];
+    (*env)->GetByteArrayRegion(env, input, 0, size, payload);
+    int count = set_trend_watch_decode((const uint8_t *)payload, (size_t)size,
+        &timestamp, words, SET_TREND_WATCH_MAX);
+    if (count < 0) return NULL;
+    values[0] = (jlong)timestamp;
+    for (int i = 0; i < count; ++i) values[i + 1] = (jlong)words[i];
+    jlongArray result = (*env)->NewLongArray(env, count + 1);
+    if (result != NULL) (*env)->SetLongArrayRegion(env, result, 0, count + 1, values);
+    return result;
+}
+
 typedef struct {
    uint8_t *storage;
    size_t storage_size;
--- a/c/set-protocol/ports/android/tests/ru/setcorp/setprotocol/trends/PlotViewportTest.kt
+++ b/c/set-protocol/ports/android/tests/ru/setcorp/setprotocol/trends/PlotViewportTest.kt
@@ -36,4 +36,12 @@ class PlotViewportTest {
        }
        SpectrumOptions().validate()
    }
+    @Test fun absoluteLimitsAndDominantPeakUseNativeCore() {
+        assertEquals(PlotLimits(0.0, 500.0, -1.0, 1.0),
+            PlotLimits(0.0, 500.0, -1.0, 1.0).validated())
+        assertTrue(runCatching { PlotLimits(1.0, 1.0, -1.0, 1.0).validated() }.isFailure)
+        val spectrum = TrendSpectrum(12, 60.0, 0.0,
+            listOf(10.0, .01, .02, .8, .03, .4, .02))
+        assertEquals(15.0, SpectrumAnalyzer.dominantPeak(spectrum)!!.frequencyHz, 0.0)
+    }
 }
--- a/c/set-protocol/src/set_plot.c
+++ b/c/set-protocol/src/set_plot.c
@@ -11,10 +11,10 @@ static int finite_values(const double *v, size_t n) {
 uint32_t set_plot_abi_version(void) { return 1U; }

 size_t set_plot_eval(uint32_t op, const double *v, size_t n, double *out, size_t cap) {
-    static const size_t sizes[] = {10, 3, 4, 4, 6, 2, 3, 2};
+    static const size_t sizes[] = {10, 3, 4, 4, 6, 2, 3, 2, 4};
    double span, fraction;
-    if (op > SET_PLOT_DB_DELTA || !v || !out || n != sizes[op] ||
-        cap < (op == SET_PLOT_TRANSFORM ? 4U : 1U)) return 0;
+    if (op > SET_PLOT_LIMITS || !v || !out || n != sizes[op] ||
+        cap < (op == SET_PLOT_TRANSFORM || op == SET_PLOT_LIMITS ? 4U : 1U)) return 0;
    if (op == SET_PLOT_TRANSFORM) {
        double w, h, fx, fy;
        if (!finite_values(v, 4) || v[2] < 1.0/128 || v[2] > 1 ||
@@ -69,6 +69,10 @@ size_t set_plot_eval(uint32_t op, const double *v, size_t n, double *out, size_t
        if (v[0] == 0 || v[1] == 0) return 0;
        out[0] = 20 * log10(fabs(v[1] / v[0]));
        break;
+    case SET_PLOT_LIMITS:
+        if (v[0] >= v[1] || v[2] >= v[3]) return 0;
+        out[0] = v[0]; out[1] = v[1]; out[2] = v[2]; out[3] = v[3];
+        return 4;
    default: return 0;
    }
    return isfinite(out[0]) ? 1 : 0;
--- a/c/set-protocol/src/set_spectrum.c
+++ b/c/set-protocol/src/set_spectrum.c
@@ -4,6 +4,13 @@

 #define PI 3.14159265358979323846

+static int compare_double(const void *left, const void *right)
+{
+    const double a = *(const double *)left;
+    const double b = *(const double *)right;
+    return (a > b) - (a < b);
+}
+
 static double window_value(int window, size_t index, size_t n)
 {
    double phase = 2.0 * PI * (double)index / (double)n;
@@ -124,3 +131,35 @@ int set_spectrum_analyze(const double *times, const double *values, size_t count
    free(scratch);
    return result;
 }
+
+int set_spectrum_dominant_peak(const double *amplitudes, size_t count,
+    double bin_hz, double relative_threshold, double absolute_floor,
+    double *scratch, size_t scratch_capacity, double *peak, size_t peak_capacity)
+{
+    size_t i, usable = 0U, peak_bin = 0U;
+    double peak_amplitude = -1.0, median, threshold;
+    if (amplitudes == NULL || scratch == NULL || peak == NULL || count < 3U ||
+        scratch_capacity < count - 1U || peak_capacity < 2U || !isfinite(bin_hz) ||
+        bin_hz <= 0.0 || !isfinite(relative_threshold) || relative_threshold <= 0.0 ||
+        !isfinite(absolute_floor) || absolute_floor < 0.0) return -1;
+    for (i = 1U; i < count; ++i) {
+        if (isfinite(amplitudes[i]) && amplitudes[i] >= 0.0)
+            scratch[usable++] = amplitudes[i];
+    }
+    if (usable < 2U) return 0;
+    qsort(scratch, usable, sizeof(double), compare_double);
+    median = scratch[usable / 2U];
+    for (i = 1U; i + 1U < count; ++i) {
+        const double value = amplitudes[i];
+        if (isfinite(value) && isfinite(amplitudes[i - 1U]) && isfinite(amplitudes[i + 1U]) &&
+            value >= amplitudes[i - 1U] && value > amplitudes[i + 1U] && value > peak_amplitude) {
+            peak_bin = i;
+            peak_amplitude = value;
+        }
+    }
+    threshold = fmax(absolute_floor, median * relative_threshold);
+    if (peak_bin == 0U || peak_amplitude < threshold) return 0;
+    peak[0] = (double)peak_bin * bin_hz;
+    peak[1] = peak_amplitude;
+    return 1;
+}
--- a/c/set-protocol/src/set_trends.c
+++ b/c/set-protocol/src/set_trends.c
@@ -6,6 +6,12 @@ static uint16_t get16(const uint8_t *p)
    return (uint16_t)((uint16_t)p[0] | ((uint16_t)p[1] << 8));
 }

+static uint32_t get32(const uint8_t *p)
+{
+    return (uint32_t)p[0] | ((uint32_t)p[1] << 8) |
+        ((uint32_t)p[2] << 16) | ((uint32_t)p[3] << 24);
+}
+
 static void put16(uint8_t *p, uint16_t value)
 {
    p[0] = (uint8_t)value;
@@ -63,6 +69,12 @@ int set_trend_watch_ack(const uint8_t *payload, size_t size, uint16_t period_ms,
 }

 int set_trend_watch_values(const uint8_t *payload, size_t size, uint16_t *words, size_t capacity)
+{
+    return set_trend_watch_decode(payload, size, NULL, words, capacity);
+}
+
+int set_trend_watch_decode(const uint8_t *payload, size_t size, uint32_t *timestamp_ms,
+    uint16_t *words, size_t capacity)
 {
    size_t i, count;
    if (payload == NULL || size < 6U) return -1;
@@ -70,5 +82,6 @@ int set_trend_watch_values(const uint8_t *payload, size_t size, uint16_t *words,
    if (count > SET_TREND_WATCH_MAX || size != 6U + count * 2U || count > capacity ||
        (count > 0U && words == NULL)) return -1;
    for (i = 0U; i < count; ++i) words[i] = get16(payload + 6U + i * 2U);
+    if (timestamp_ms != NULL) *timestamp_ms = get32(payload);
    return (int)count;
 }
--- a/c/set-protocol/tests/fixtures/plot-v1.json
+++ b/c/set-protocol/tests/fixtures/plot-v1.json
@@ -23,6 +23,8 @@
    {"name":"db_gain","op":7,"input":[1,10],"output":[20]},
    {"name":"db_attenuation","op":7,"input":[10,1],"output":[-20]},
    {"name":"db_zero_reference","op":7,"input":[0,1],"output":null},
+    {"name":"absolute_limits","op":8,"input":[0,500,-2,2],"output":[0,500,-2,2]},
+    {"name":"reversed_x_limits","op":8,"input":[1,1,-2,2],"output":null},
    {"name":"zero_range","op":2,"input":[1,1,1,0],"output":null},
    {"name":"zero_pixels","op":4,"input":[0,1,0,0,1,0],"output":null},
    {"name":"bad_viewport","op":0,"input":[0,0,0,1,2,1,0,0,0.5,0.5],"output":null}
--- a/c/set-protocol/tests/test_plot.c
+++ b/c/set-protocol/tests/test_plot.c
@@ -26,6 +26,13 @@ int main(void) {
    assert(output[0] == y[0]);
    assert(set_plot_eval(SET_PLOT_DRAG, drag, 6, output, 4) == 1);
    assert(output[0] == -4);
+    {
+        const double limits[] = {0, 500, -2, 2};
+        const double reversed[] = {1, 1, -2, 2};
+        assert(set_plot_eval(SET_PLOT_LIMITS, limits, 4, output, 4) == 4);
+        assert(output[0] == 0 && output[1] == 500 && output[2] == -2 && output[3] == 2);
+        assert(set_plot_eval(SET_PLOT_LIMITS, reversed, 4, output, 4) == 0);
+    }
    puts("shared plot: OK");
    return 0;
 }
--- a/c/set-protocol/tests/test_spectrum.c
+++ b/c/set-protocol/tests/test_spectrum.c
@@ -17,6 +17,15 @@ int main(void)
    assert(set_spectrum_analyze(times, values, 32, 32, 0, SET_FILTER_LOW_PASS, 0, 16, 1, output, 17, meta) == SET_SPECTRUM_CUTOFF);
    times[12] = times[11];
    assert(set_spectrum_analyze(times, values, 32, 32, 0, 0, 0, 0, 1, output, 17, meta) == SET_SPECTRUM_TIMING);
+    {
+        const double amplitudes[] = {10.0, .01, .02, .8, .03, .4, .02};
+        const double noise[] = {0, .10, .12, .11, .09, .10};
+        double scratch[6], peak[2];
+        assert(set_spectrum_dominant_peak(amplitudes, 7, 5, 3, 1e-6, scratch, 6, peak, 2) == 1);
+        assert(peak[0] == 15 && peak[1] == .8);
+        assert(set_spectrum_dominant_peak(noise, 6, 1, 3, 1e-6, scratch, 6, peak, 2) == 0);
+        assert(set_spectrum_dominant_peak(amplitudes, 7, 0, 3, 1e-6, scratch, 6, peak, 2) == -1);
+    }
    puts("shared spectrum: OK");
    return 0;
 }
--- a/c/set-protocol/tests/test_trends.c
+++ b/c/set-protocol/tests/test_trends.c
@@ -34,8 +34,11 @@ int main(void)
    assert(!set_trend_watch_ack(expected, 4, 1000, 3));
    const uint8_t packet[] = {1, 2, 3, 4, 2, 0, 52, 18, 255, 255};
    uint16_t words[64];
+    uint32_t timestamp = 0;
    assert(set_trend_watch_values(packet, sizeof(packet), words, 64) == 2);
    assert(words[0] == 0x1234 && words[1] == 0xFFFF);
+    assert(set_trend_watch_decode(packet, sizeof(packet), &timestamp, words, 64) == 2);
+    assert(timestamp == 0x04030201UL);
    assert(set_trend_watch_values(packet, sizeof(packet) - 1, words, 64) == -1);
    assert(set_trend_watch_values(packet, sizeof(packet), words, 1) == -1);
    puts("Shared trend tests passed");
--- a/python/protocan/plot.py
+++ b/python/protocan/plot.py
@@ -67,6 +67,10 @@ class PlotMath:
        except ValueError:
            return None

+    def limits(self, left: float, right: float, bottom: float, top: float) -> "Bounds":
+        """Validate absolute axis limits in the shared core."""
+        return Bounds(*self.call(8, left, right, bottom, top))
+

@dataclass(frozen=True)
 class Viewport:
@@ -92,6 +96,9 @@ class Bounds:
    bottom: float
    top: float

+    def validated(self, core: PlotMath) -> "Bounds":
+        return core.limits(self.left, self.right, self.bottom, self.top)
+
    def fraction(self, core: PlotMath, value: float, horizontal: bool) -> float:
        return core.call(2, value, self.bottom if horizontal else self.left,
            self.top if horizontal else self.right, int(horizontal))[0]
--- a/python/protocan/spectrum.py
+++ b/python/protocan/spectrum.py
@@ -37,6 +37,12 @@ class Spectrum:
        return tuple(i * self.sample_rate / self.size for i in range(len(self.amplitudes)))


+@dataclass(frozen=True)
+class SpectrumPeak:
+    frequency_hz: float
+    amplitude: float
+
+
 class NativeSpectrum:
    def __init__(self, library: ctypes.CDLL):
        self.lib = library
@@ -46,6 +52,11 @@ class NativeSpectrum:
            ctypes.c_int, ctypes.c_int, ctypes.c_double, ctypes.c_double, ctypes.c_int,
            pointer, ctypes.c_size_t, pointer]
        self._analyze.restype = ctypes.c_int
+        self._peak = library.set_spectrum_dominant_peak
+        self._peak.argtypes = [pointer, ctypes.c_size_t, ctypes.c_double,
+            ctypes.c_double, ctypes.c_double, pointer, ctypes.c_size_t,
+            pointer, ctypes.c_size_t]
+        self._peak.restype = ctypes.c_int

    def analyze(self, times, values, *, max_size=4096, window=Window.HANN, filter=Filter.NONE,
                low_hz=10.0, high_hz=100.0, remove_mean=True) -> Spectrum:
@@ -69,3 +80,15 @@ class NativeSpectrum:
            raise ValueError(message.get(status, "FFT failed"))
        n = int(meta[0])
        return Spectrum(n, meta[1], meta[2], tuple(output[:n // 2 + 1]))
+
+    def dominant_peak(self, spectrum: Spectrum, *, relative_threshold: float = 3.0,
+                      absolute_floor: float = 1e-6) -> SpectrumPeak | None:
+        amplitudes = (ctypes.c_double * len(spectrum.amplitudes))(*spectrum.amplitudes)
+        scratch = (ctypes.c_double * max(1, len(spectrum.amplitudes) - 1))()
+        output = (ctypes.c_double * 2)()
+        status = self._peak(amplitudes, len(spectrum.amplitudes),
+            spectrum.sample_rate / spectrum.size, relative_threshold, absolute_floor,
+            scratch, len(scratch), output, 2)
+        if status < 0:
+            raise ValueError("Invalid spectrum peak input")
+        return SpectrumPeak(output[0], output[1]) if status else None
--- a/python/protocan/trends.py
+++ b/python/protocan/trends.py
@@ -54,6 +54,8 @@ class TrendSignal:
    deviceType: int = 7
    device: int = 13
    byteOffset: int = 0
+    multiplier: float = 1.0
+    iq: int = 0
    extended: bool = True

    @classmethod
@@ -72,9 +74,11 @@ class TrendSignal:
        for field in ("id", "name", "source", "address", "color", "valueType"):
            if type(getattr(self, field)) is not str:
                raise ValueError(f"{field} must be a string")
-        for field in ("order", "deviceType", "device", "byteOffset"):
+        for field in ("order", "deviceType", "device", "byteOffset", "iq"):
            if type(getattr(self, field)) is not int:
                raise ValueError(f"{field} must be an integer")
+        if type(self.multiplier) not in (int, float) or not math.isfinite(self.multiplier):
+            raise ValueError("multiplier must be a finite number")
        if type(self.visible) is not bool or type(self.extended) is not bool:
            raise ValueError("Visibility and CAN format must be boolean")
        if not self.id.strip() or len(self.id) > 80 or not 1 <= self.order <= 9999:
@@ -98,12 +102,11 @@ class TrendSignal:
            raise ValueError("Invalid ProtoCAN device")
        if self.source == "CAN_RAW" and not 0 <= self.byteOffset <= 6:
            raise ValueError("Word offset must be 0..6")
+        if not 0 <= self.iq <= 30:
+            raise ValueError("IQ must be 0..30")

-    def word_value(self, word: int) -> float:
-        if not 0 <= word <= 65535:
-            raise ValueError("Not a 16-bit word")
-        return float(word - 65536 if self.valueType == "INT16" and word >= 32768 else word)
-
+    def display_value(self, raw_value: float) -> float:
+        return raw_value * self.multiplier / (1 << self.iq)

 def validate_settings(settings: Mapping[str, list[TrendSignal]]) -> None:
    ids = set()
@@ -138,14 +141,15 @@ def decode_settings(text: str) -> dict[str, list[TrendSignal]]:
        raise ValueError("profiles must be an object")
    result = {}
    fields = set(TrendSignal.__dataclass_fields__)
+    required_fields = fields - {"multiplier", "iq"}
    for profile, items in profiles.items():
        if not isinstance(items, list) or len(items) > MAX_SIGNALS:
            raise ValueError("Expected up to 64 signals")
        signals = []
        for item in items:
-            if not isinstance(item, dict) or not fields <= item.keys():
+            if not isinstance(item, dict) or not required_fields <= item.keys():
                raise ValueError("Missing signal fields")
-            signals.append(TrendSignal(**{key: item[key] for key in fields}))
+            signals.append(TrendSignal(**{key: item[key] for key in fields if key in item}))
        result[profile] = signals
    validate_settings(result)
    return result
@@ -178,6 +182,20 @@ class NativeTrends:
            ctypes.c_uint8, ctypes.c_uint8, ctypes.c_uint8, ctypes.c_uint8,
            ctypes.c_uint32, ctypes.c_uint8, ctypes.c_void_p, ctypes.c_size_t]
        self.decode.restype = ctypes.c_int32
+        self._word = library.set_trend_word_value
+        self._word.argtypes = [ctypes.c_uint16, ctypes.c_uint8]
+        self._word.restype = ctypes.c_int32
+        self._watch_request = library.set_trend_watch_request
+        self._watch_request.argtypes = [ctypes.c_uint16, ctypes.POINTER(ctypes.c_uint16),
+            ctypes.c_size_t, ctypes.c_void_p, ctypes.c_size_t]
+        self._watch_request.restype = ctypes.c_size_t
+        self._watch_ack = library.set_trend_watch_ack
+        self._watch_ack.argtypes = [ctypes.c_void_p, ctypes.c_size_t, ctypes.c_uint16, ctypes.c_size_t]
+        self._watch_ack.restype = ctypes.c_int
+        self._watch_decode = library.set_trend_watch_decode
+        self._watch_decode.argtypes = [ctypes.c_void_p, ctypes.c_size_t,
+            ctypes.POINTER(ctypes.c_uint32), ctypes.POINTER(ctypes.c_uint16), ctypes.c_size_t]
+        self._watch_decode.restype = ctypes.c_int

    def can_value(self, signal: TrendSignal, can_id: int, flags: int, data: bytes) -> float | None:
        if signal.source not in ("CAN_GAS", "CAN_RAW"):
@@ -191,3 +209,33 @@ class NativeTrends:
            signal.byteOffset, signal.extended, signal.valueType == "INT16", can_id, flags,
            payload, len(data))
        return None if value == -2147483648 else float(value)
+
+    def word_value(self, signal: TrendSignal, word: int) -> float:
+        if not 0 <= word <= 65535:
+            raise ValueError("Not a 16-bit word")
+        return float(self._word(word, signal.valueType == "INT16"))
+
+    def watch_request(self, period_ms: int, addresses: list[int]) -> bytes:
+        if not 0 <= period_ms <= 65535 or len(addresses) > MAX_SIGNALS or any(
+                type(address) is not int or not 0 <= address <= 65535 for address in addresses):
+            raise ValueError("Invalid GAS watch request")
+        source = (ctypes.c_uint16 * len(addresses))(*addresses)
+        output = (ctypes.c_uint8 * (4 + len(addresses) * 2))()
+        size = self._watch_request(period_ms, source, len(addresses), output, len(output))
+        if not size:
+            raise ValueError("Invalid GAS watch request")
+        return bytes(output[:size])
+
+    def validate_watch_ack(self, payload: bytes, period_ms: int, count: int) -> None:
+        data = (ctypes.c_uint8 * len(payload)).from_buffer_copy(payload)
+        if not self._watch_ack(data, len(payload), period_ms, count):
+            raise ValueError("Device did not accept the complete GAS subscription")
+
+    def watch_values(self, payload: bytes, expected_count: int | None = None) -> tuple[int, list[int]]:
+        data = (ctypes.c_uint8 * len(payload)).from_buffer_copy(payload)
+        timestamp = ctypes.c_uint32()
+        words = (ctypes.c_uint16 * MAX_SIGNALS)()
+        count = self._watch_decode(data, len(payload), ctypes.byref(timestamp), words, MAX_SIGNALS)
+        if count < 0 or expected_count is not None and count != expected_count:
+            raise ValueError("Invalid GAS watch data")
+        return timestamp.value, list(words[:count])
--- a/python/setprotocol/firmware_publish.py
+++ b/python/setprotocol/firmware_publish.py
@@ -0,0 +1,145 @@
+"""Reusable helpers for publishing the shared firmware release catalog."""
+
+from __future__ import annotations
+
+import hashlib
+import json
+import re
+from dataclasses import dataclass
+from pathlib import Path
+
+from .firmware_catalog import (
+    MAX_MANIFEST_BYTES,
+    SUPPORTED_TRANSPORTS,
+    parse_firmware_catalog,
+)
+
+MAX_FIRMWARE_BYTES = 128 * 1024 * 1024
+
+
+@dataclass(frozen=True)
+class FirmwarePublication:
+    """Metadata required to publish one firmware image."""
+
+    path: Path
+    product: str
+    version_name: str
+    version_code: int
+    transport: str
+    base_address: int | None = None
+    notes: str = ""
+
+    def validate(self) -> None:
+        if not self.path.is_file():
+            raise ValueError(f"Firmware file is missing: {self.path}")
+        if self.path.suffix.lower() not in {".bin", ".hex"}:
+            raise ValueError("Firmware file must have a .bin or .hex extension")
+        size = self.path.stat().st_size
+        if size <= 0:
+            raise ValueError("Firmware file is empty")
+        if size > MAX_FIRMWARE_BYTES:
+            raise ValueError("Firmware file exceeds the maximum size")
+        if not self.product.strip():
+            raise ValueError("Firmware product is empty")
+        if not self.version_name.strip():
+            raise ValueError("Firmware version name is empty")
+        if not 0 <= self.version_code <= 0x7FFFFFFF:
+            raise ValueError(
+                "Firmware version code must be between 0 and 2147483647"
+            )
+        if self.transport not in SUPPORTED_TRANSPORTS:
+            raise ValueError("Unsupported firmware transport")
+        if (
+            self.base_address is not None
+            and not 0 <= self.base_address <= 0xFFFFFFFF
+        ):
+            raise ValueError("Firmware base address is outside the uint32 range")
+
+
+def sha256_file(path: Path) -> str:
+    digest = hashlib.sha256()
+    with path.open("rb") as source:
+        for chunk in iter(lambda: source.read(1024 * 1024), b""):
+            digest.update(chunk)
+    return digest.hexdigest()
+
+
+def safe_release_tag_part(value: str) -> str:
+    source = value.strip()
+    part = re.sub(r"[^A-Za-z0-9._-]+", "-", source).strip("-.")
+    digest = hashlib.sha256(source.encode("utf-8")).hexdigest()[:8]
+    if not part:
+        return digest
+    return part if part == source else f"{part}-{digest}"
+
+
+def firmware_release_tag(publication: FirmwarePublication) -> str:
+    return "firmware-%s-v%s" % (
+        safe_release_tag_part(publication.product),
+        safe_release_tag_part(publication.version_name),
+    )
+
+
+def firmware_release_entry(
+    publication: FirmwarePublication, image_url: str, sha256: str
+) -> dict:
+    result = {
+        "product": publication.product.strip(),
+        "versionCode": publication.version_code,
+        "versionName": publication.version_name.strip(),
+        "imageUrl": image_url,
+        "fileName": publication.path.name,
+        "sha256": sha256,
+        "transport": publication.transport,
+        "notes": publication.notes.strip(),
+    }
+    if publication.base_address is not None:
+        result["baseAddress"] = f"0x{publication.base_address:08X}"
+    return result
+
+
+def firmware_entry_identity(entry: dict) -> tuple[str, int, str]:
+    return (
+        str(entry.get("product", entry.get("device", ""))).strip().casefold(),
+        int(entry.get("versionCode", 0)),
+        str(entry.get("transport", "rs485")).strip().lower(),
+    )
+
+
+def update_firmware_manifest(manifest: dict, entry: dict) -> dict:
+    """Insert or replace one release without disturbing other manifest data."""
+    result = dict(manifest)
+    existing = manifest.get("firmware")
+    firmware = dict(existing) if isinstance(existing, dict) else {}
+    rows = firmware.get("releases") if isinstance(existing, dict) else existing
+    releases = (
+        [dict(row) for row in rows if isinstance(row, dict)]
+        if isinstance(rows, list)
+        else []
+    )
+    identity = firmware_entry_identity(entry)
+    releases = [
+        row for row in releases if firmware_entry_identity(row) != identity
+    ]
+    releases.append(dict(entry))
+    releases.sort(
+        key=lambda row: (
+            str(row.get("product", row.get("device", ""))).casefold(),
+            -int(row.get("versionCode", 0)),
+            str(row.get("transport", "rs485")),
+        )
+    )
+    previous_rows = firmware.get("releases")
+    changed = releases != previous_rows
+    firmware["catalogVersion"] = (
+        int(firmware.get("catalogVersion", 0)) + int(changed)
+    )
+    firmware["releases"] = releases
+    result["firmware"] = firmware
+
+    encoded = (json.dumps(result, ensure_ascii=False) + "\n").encode("utf-8")
+    if len(encoded) > MAX_MANIFEST_BYTES:
+        raise ValueError("Updated update.json exceeds the maximum size")
+    parse_firmware_catalog(encoded, "https://catalog.invalid/update.json")
+    return result
+
--- a/python/tests/test_firmware_publish.py
+++ b/python/tests/test_firmware_publish.py
@@ -0,0 +1,93 @@
+from __future__ import annotations
+
+import tempfile
+import unittest
+from pathlib import Path
+
+from setprotocol.firmware_publish import (
+    FirmwarePublication,
+    firmware_release_entry,
+    firmware_release_tag,
+    update_firmware_manifest,
+)
+
+
+class FirmwarePublishTests(unittest.TestCase):
+    def publication(self, path: Path, **overrides) -> FirmwarePublication:
+        fields = {
+            "path": path,
+            "product": "F103DS18",
+            "version_name": "1.1.0",
+            "version_code": 0x00010100,
+            "transport": "can",
+            "base_address": 0x08003000,
+            "notes": "Verified release",
+        }
+        fields.update(overrides)
+        return FirmwarePublication(**fields)
+
+    def test_publication_validates_file_and_metadata(self) -> None:
+        with tempfile.TemporaryDirectory() as temporary:
+            image = Path(temporary) / "image.hex"
+            image.write_text(":00000001FF\n", encoding="ascii")
+            self.publication(image).validate()
+            with self.assertRaisesRegex(ValueError, "Unsupported"):
+                self.publication(image, transport="unknown").validate()
+
+    def test_entry_and_tag_are_deterministic(self) -> None:
+        publication = self.publication(Path("image.hex"))
+        entry = firmware_release_entry(
+            publication, "https://example.test/image.hex", "ab" * 32
+        )
+        self.assertEqual(
+            firmware_release_tag(publication), "firmware-F103DS18-v1.1.0"
+        )
+        self.assertEqual(entry["baseAddress"], "0x08003000")
+
+    def test_update_preserves_sections_and_replaces_same_release(self) -> None:
+        first = {
+            "product": "Device",
+            "versionCode": 7,
+            "versionName": "1.2.3",
+            "imageUrl": "https://example.test/old.bin",
+            "fileName": "old.bin",
+            "sha256": "11" * 32,
+            "transport": "rs485",
+        }
+        manifest = update_firmware_manifest(
+            {"windows": {"versionCode": 8}}, first
+        )
+        replacement = {
+            **first,
+            "imageUrl": "https://example.test/new.bin",
+            "fileName": "new.bin",
+            "sha256": "22" * 32,
+        }
+        updated = update_firmware_manifest(manifest, replacement)
+        self.assertEqual(updated["windows"], {"versionCode": 8})
+        self.assertEqual(len(updated["firmware"]["releases"]), 1)
+        self.assertEqual(
+            updated["firmware"]["releases"][0]["sha256"], "22" * 32
+        )
+        self.assertEqual(updated["firmware"]["catalogVersion"], 2)
+
+    def test_legacy_array_is_migrated_without_data_loss(self) -> None:
+        legacy = {
+            "product": "Legacy",
+            "versionCode": 1,
+            "versionName": "1.0",
+            "imageUrl": "https://example.test/legacy.bin",
+            "fileName": "legacy.bin",
+            "sha256": "33" * 32,
+            "transport": "rs485",
+        }
+        current = {**legacy, "product": "Current", "versionCode": 2}
+        updated = update_firmware_manifest({"firmware": [legacy]}, current)
+        self.assertCountEqual(
+            [row["product"] for row in updated["firmware"]["releases"]],
+            ["Legacy", "Current"],
+        )
+
+
+if __name__ == "__main__":
+    unittest.main()
--- a/python/tests/test_plot.py
+++ b/python/tests/test_plot.py
@@ -56,6 +56,9 @@ class PlotTests(unittest.TestCase):
        self.assertAlmostEqual(20, self.core.db_delta(1, 10))
        self.assertAlmostEqual(-20, self.core.db_delta(10, 1))
        self.assertIsNone(self.core.db_delta(0, 1))
+        self.assertEqual(Bounds(0, 500, -2, 2), self.core.limits(0, 500, -2, 2))
+        with self.assertRaises(ValueError):
+            self.core.limits(1, 1, -2, 2)


 if __name__ == "__main__":
--- a/python/tests/test_spectrum.py
+++ b/python/tests/test_spectrum.py
@@ -35,6 +35,9 @@ class SpectrumTests(unittest.TestCase):
                peak = max(range(len(result.amplitudes)), key=result.amplitudes.__getitem__)
                self.assertEqual(64, result.frequencies[peak])
                self.assertAlmostEqual(3.25, result.amplitudes[peak], places=9)
+                detected = self.core.dominant_peak(result)
+                self.assertAlmostEqual(64, detected.frequency_hz, places=9)
+                self.assertAlmostEqual(3.25, detected.amplitude, places=9)

    def test_dc_and_nyquist_are_not_doubled(self):
        times, _ = self.sample()
--- a/python/tests/test_trends.py
+++ b/python/tests/test_trends.py
@@ -14,6 +14,16 @@ FIXTURE = Path(__file__).resolve().parents[2] / "c/set-protocol/tests/fixtures/t


 class TrendTests(unittest.TestCase):
+    def test_multiplier_and_iq_scale_display_and_old_json_defaults(self):
+        signal = TrendSignal("scaled", multiplier=2.5, iq=3)
+        self.assertEqual(10.0, signal.display_value(32.0))
+        signal.validate("TMS2812")
+        payload = json.loads(encode_settings({"TMS2812": [signal]}))
+        payload["profiles"]["TMS2812"][0].pop("multiplier")
+        payload["profiles"]["TMS2812"][0].pop("iq")
+        restored = decode_settings(json.dumps(payload))["TMS2812"][0]
+        self.assertEqual((1.0, 0), (restored.multiplier, restored.iq))
+
    def test_shared_kotlin_fixture_and_round_trip(self):
        settings = decode_settings(FIXTURE.read_text(encoding="utf-8"))
        self.assertEqual(5, sum(map(len, settings.values())))
@@ -57,7 +67,6 @@ class TrendTests(unittest.TestCase):
        for value in ("-1", "+1", "FF", "0x", "1.0", "256"):
            with self.assertRaises(ValueError):
                parse_address(value, 255)
-        self.assertEqual(-2.0, TrendSignal("s", valueType="INT16").word_value(65534))

    def test_bounded_history(self):
        history = TrendHistory()
@@ -81,6 +90,13 @@ class TrendTests(unittest.TestCase):
        self.assertIsNone(core.can_value(signal, frame_id ^ 0x08000000, 1, data))
        raw = replace(signal, source="CAN_RAW", address="0x321", extended=False, byteOffset=2)
        self.assertEqual(-2.0, core.can_value(raw, 0x321, 0, data))
+        self.assertEqual(-2.0, core.word_value(TrendSignal("s", valueType="INT16"), 65534))
+        self.assertEqual(bytes([232, 3, 2, 0, 52, 18, 255, 255]),
+                         core.watch_request(1000, [0x1234, 0xFFFF]))
+        core.validate_watch_ack(bytes([232, 3, 2, 0]), 1000, 2)
+        timestamp, words = core.watch_values(bytes([1, 2, 3, 4, 2, 0, 52, 18, 255, 255]), 2)
+        self.assertEqual(0x04030201, timestamp)
+        self.assertEqual([0x1234, 0xFFFF], words)


 if __name__ == "__main__":
--- a/tools/firmware-publish/PUBLISH_FIRMWARE.bat
+++ b/tools/firmware-publish/PUBLISH_FIRMWARE.bat
@@ -0,0 +1,221 @@
+@echo off
+setlocal EnableExtensions DisableDelayedExpansion
+
+set "FW_TOOL_DIR=%~dp0"
+set "FW_MODE=--preflight"
+set "FW_CONFIG="
+set "FW_ASSUME_YES=0"
+set "FW_ALLOW_DIRTY=0"
+
+:parse_arguments
+if "%~1"=="" goto arguments_done
+if /i "%~1"=="--preflight" (
+    set "FW_MODE=--preflight"
+    shift
+    goto parse_arguments
+)
+if /i "%~1"=="--publish" (
+    set "FW_MODE=--publish"
+    shift
+    goto parse_arguments
+)
+if /i "%~1"=="--yes" (
+    set "FW_ASSUME_YES=1"
+    shift
+    goto parse_arguments
+)
+if /i "%~1"=="--allow-dirty" (
+    set "FW_ALLOW_DIRTY=1"
+    shift
+    goto parse_arguments
+)
+if /i "%~1"=="--config" (
+    if "%~2"=="" goto missing_config_value
+    set "FW_CONFIG=%~2"
+    shift
+    shift
+    goto parse_arguments
+)
+if /i "%~1"=="--help" goto usage
+if /i "%~1"=="-h" goto usage
+echo ERROR: unknown argument: %~1
+goto usage_error
+
+:missing_config_value
+echo ERROR: --config requires a path.
+goto usage_error
+
+:arguments_done
+if not defined FW_CONFIG (
+    if exist "%CD%\firmware-release.cmd" (
+        set "FW_CONFIG=%CD%\firmware-release.cmd"
+    ) else (
+        set "FW_CONFIG=%FW_TOOL_DIR%firmware-release.cmd"
+    )
+)
+for %%I in ("%FW_CONFIG%") do set "FW_CONFIG=%%~fI"
+if not exist "%FW_CONFIG%" (
+    echo ERROR: publication config not found:
+    echo   %FW_CONFIG%
+    echo Copy one of the examples to the firmware project root as
+    echo firmware-release.cmd, then edit its values.
+    exit /b 2
+)
+
+for %%I in ("%FW_CONFIG%") do set "FW_CONFIG_DIR=%%~dpI"
+call "%FW_CONFIG%"
+if errorlevel 1 (
+    echo ERROR: publication config returned an error.
+    exit /b 2
+)
+
+if not defined FW_PRODUCT goto missing_FW_PRODUCT
+if not defined FW_VERSION goto missing_FW_VERSION
+if not defined FW_VERSION_CODE goto missing_FW_VERSION_CODE
+if not defined FW_TRANSPORTS goto missing_FW_TRANSPORTS
+if not defined FW_IMAGE goto missing_FW_IMAGE
+if not defined FW_PROJECT_ROOT set "FW_PROJECT_ROOT=%FW_CONFIG_DIR%"
+
+pushd "%FW_CONFIG_DIR%" >nul
+if errorlevel 1 (
+    echo ERROR: cannot enter config directory: %FW_CONFIG_DIR%
+    exit /b 2
+)
+for %%I in ("%FW_PROJECT_ROOT%") do set "FW_PROJECT_ROOT_ABS=%%~fI"
+for %%I in ("%FW_IMAGE%") do set "FW_IMAGE_ABS=%%~fI"
+if defined FW_SETGUI_ROOT for %%I in ("%FW_SETGUI_ROOT%") do set "FW_SETGUI_ROOT_ABS=%%~fI"
+popd
+
+if not defined FW_SETGUI_ROOT_ABS call :find_setgui
+if not defined FW_SETGUI_ROOT_ABS (
+    echo ERROR: SETGUI was not found.
+    echo Set FW_SETGUI_ROOT in %FW_CONFIG%
+    exit /b 2
+)
+set "FW_SETGUI_PUBLISHER=%FW_SETGUI_ROOT_ABS%\PUBLISH_FIRMWARE.bat"
+if not exist "%FW_SETGUI_PUBLISHER%" (
+    echo ERROR: SETGUI publisher not found:
+    echo   %FW_SETGUI_PUBLISHER%
+    exit /b 2
+)
+if not exist "%FW_IMAGE_ABS%" (
+    echo ERROR: firmware image not found:
+    echo   %FW_IMAGE_ABS%
+    exit /b 2
+)
+
+for %%I in ("%FW_IMAGE_ABS%") do set "FW_IMAGE_EXT=%%~xI"
+if /i not "%FW_IMAGE_EXT%"==".hex" if /i not "%FW_IMAGE_EXT%"==".bin" (
+    echo ERROR: FW_IMAGE must point to a .hex or .bin file, not %FW_IMAGE_EXT%.
+    echo Keil must create a HEX file; CCS must run C2000 Hex Utility.
+    exit /b 2
+)
+
+echo.
+echo Firmware publication
+echo   Mode:       %FW_MODE%
+echo   Project:    %FW_PROJECT_ROOT_ABS%
+echo   Image:      %FW_IMAGE_ABS%
+echo   Product:    %FW_PRODUCT%
+echo   Version:    %FW_VERSION% ^(%FW_VERSION_CODE%^)
+echo   Transports: %FW_TRANSPORTS%
+if defined FW_BASE_ADDRESS echo   Base address: %FW_BASE_ADDRESS%
+echo.
+
+if /i "%FW_MODE%"=="--publish" call :guard_worktree
+if errorlevel 1 exit /b %errorlevel%
+
+if /i "%FW_MODE%"=="--publish" if "%FW_ASSUME_YES%"=="0" (
+    echo This will upload the image and change the public firmware catalog.
+    choice /C YN /N /M "Continue [Y/N]? "
+    if errorlevel 2 (
+        echo Publication cancelled.
+        exit /b 2
+    )
+)
+
+for %%T in (%FW_TRANSPORTS:,= %) do (
+    call :publish_transport "%%~T"
+    if errorlevel 1 goto publication_failed
+)
+
+if /i "%FW_MODE%"=="--publish" (
+    echo.
+    echo Publication completed and verified for all transports.
+) else (
+    echo.
+    echo Preflight passed. Run with --publish only when this build is a release.
+)
+exit /b 0
+
+:publication_failed
+echo.
+echo ERROR: publication step failed; remaining transports were not processed.
+exit /b 1
+
+:publish_transport
+set "FW_TRANSPORT=%~1"
+if "%FW_TRANSPORT%"=="" exit /b 0
+echo ----- %FW_TRANSPORT% -----
+if defined FW_BASE_ADDRESS (
+    call "%FW_SETGUI_PUBLISHER%" %FW_MODE% --file "%FW_IMAGE_ABS%" --product "%FW_PRODUCT%" --version "%FW_VERSION%" --version-code "%FW_VERSION_CODE%" --transport "%FW_TRANSPORT%" --base-address "%FW_BASE_ADDRESS%" --notes "%FW_NOTES%"
+) else (
+    call "%FW_SETGUI_PUBLISHER%" %FW_MODE% --file "%FW_IMAGE_ABS%" --product "%FW_PRODUCT%" --version "%FW_VERSION%" --version-code "%FW_VERSION_CODE%" --transport "%FW_TRANSPORT%" --notes "%FW_NOTES%"
+)
+exit /b %errorlevel%
+
+:guard_worktree
+where git >nul 2>nul
+if errorlevel 1 (
+    echo WARNING: Git is unavailable; source cleanliness was not checked.
+    exit /b 0
+)
+git -C "%FW_PROJECT_ROOT_ABS%" rev-parse --is-inside-work-tree >nul 2>nul
+if errorlevel 1 (
+    echo WARNING: project is not a Git worktree; source cleanliness was not checked.
+    exit /b 0
+)
+git -C "%FW_PROJECT_ROOT_ABS%" diff --quiet HEAD -- >nul 2>nul
+if not errorlevel 1 exit /b 0
+if "%FW_ALLOW_DIRTY%"=="1" (
+    echo WARNING: publishing from a worktree with tracked changes.
+    exit /b 0
+)
+echo ERROR: tracked project files differ from HEAD.
+echo Commit the release sources or repeat with --allow-dirty deliberately.
+exit /b 3
+
+:find_setgui
+for %%I in ("%FW_CONFIG_DIR%..\SETGUI" "%FW_CONFIG_DIR%..\..\SETGUI" "%FW_CONFIG_DIR%..\..\..\SETGUI") do (
+    if exist "%%~fI\PUBLISH_FIRMWARE.bat" if not defined FW_SETGUI_ROOT_ABS set "FW_SETGUI_ROOT_ABS=%%~fI"
+)
+exit /b 0
+
+:missing_FW_PRODUCT
+echo ERROR: FW_PRODUCT is not set in %FW_CONFIG%
+exit /b 2
+:missing_FW_VERSION
+echo ERROR: FW_VERSION is not set in %FW_CONFIG%
+exit /b 2
+:missing_FW_VERSION_CODE
+echo ERROR: FW_VERSION_CODE is not set in %FW_CONFIG%
+exit /b 2
+:missing_FW_TRANSPORTS
+echo ERROR: FW_TRANSPORTS is not set in %FW_CONFIG%
+exit /b 2
+:missing_FW_IMAGE
+echo ERROR: FW_IMAGE is not set in %FW_CONFIG%
+exit /b 2
+
+:usage
+echo Usage:
+echo   PUBLISH_FIRMWARE.bat [--config PATH] --preflight
+echo   PUBLISH_FIRMWARE.bat [--config PATH] --publish [--yes] [--allow-dirty]
+echo.
+echo Default mode is --preflight. Default config is firmware-release.cmd
+echo in the current directory or next to this script.
+exit /b 0
+
+:usage_error
+call :usage
+exit /b 2
--- a/tools/firmware-publish/README.md
+++ b/tools/firmware-publish/README.md
@@ -0,0 +1,159 @@
+# Публикация прошивки из Keil и CCS 12
+
+Этот комплект связывает проект прошивки с каталогом SETGUI. IDE по-прежнему
+собирает штатный загрузочный файл, а `PUBLISH_FIRMWARE.bat`:
+
+1. читает метаданные выпуска из `firmware-release.cmd`;
+2. проверяет наличие и формат `.hex` или `.bin`;
+3. запускает локальную проверку SETGUI (`--preflight`) либо публикацию
+   (`--publish`);
+4. для каждого транспорта загружает образ в Gitea, скачивает его обратно,
+   сверяет SHA-256 и только после этого обновляет `update.json`.
+
+Пароль в проекте не хранится. Публикатор использует учётные данные Gitea,
+которые сохранены в SETGUI через окно «Версия и обновление».
+
+## Один раз на рабочем компьютере
+
+1. Соберите или запустите SETGUI и сохраните в нём логин и пароль (либо токен
+   вместо пароля) Gitea.
+2. Убедитесь, что у SETGUI создано Python-окружение `.venv`.
+3. Подключите `templates` как сабмодуль проекта либо используйте уже общий
+   checkout. Не делайте отдельные исправленные копии скрипта в каждом проекте.
+4. Скопируйте подходящий файл из [`examples`](examples) в корень проекта под
+   именем `firmware-release.cmd` и исправьте значения.
+
+`firmware-release.cmd` содержит только метаданные:
+
+```bat
+set "FW_PROJECT_ROOT=%~dp0"
+set "FW_SETGUI_ROOT=%~dp0..\SETGUI"
+set "FW_PRODUCT=F103DS18"
+set "FW_VERSION=1.1.0"
+set "FW_VERSION_CODE=0x00010100"
+set "FW_TRANSPORTS=can rs485"
+set "FW_BASE_ADDRESS=0x08003000"
+set "FW_IMAGE=mdk\build\ds18b20_f103.hex"
+set "FW_NOTES=Краткое описание выпуска"
+```
+
+Пути считаются относительно каталога `firmware-release.cmd`. Если SETGUI не
+лежит рядом с проектом, укажите абсолютный `FW_SETGUI_ROOT` или системную
+переменную с тем же именем.
+
+### Обязательные поля
+
+| Поле | Значение |
+|---|---|
+| `FW_PRODUCT` | Стабильный идентификатор изделия. Не меняйте регистр/написание между версиями. |
+| `FW_VERSION` | Читаемая версия SemVer, например `1.1.0`. |
+| `FW_VERSION_CODE` | Число для сравнения версий. Рекомендуется `(major << 16) + (minor << 8) + patch`: `1.1.0` = `0x00010100`. |
+| `FW_TRANSPORTS` | Один или несколько транспортов через пробел: `can`, `rs485`, `tms`. |
+| `FW_IMAGE` | Готовый файл `.hex` или `.bin`. `.axf` и `.out` публиковать нельзя. |
+
+`FW_BASE_ADDRESS` нужен для обычного бинарного образа STM32. Для Intel HEX
+адрес уже записан в файле, но поле каталога всё равно лучше заполнить адресом
+приложения. Для загрузочной таблицы TMS SCI8 оставьте поле пустым.
+
+## Keil MDK / Arm Compiler 6
+
+1. В **Options for Target → Output** включите **Create HEX File**.
+2. Укажите в `FW_IMAGE` реальный выходной файл, например
+   `mdk\build\ds18b20_f103.hex`.
+3. Запустите полную сборку и локальную проверку. В `KONOR_ds18b20`, где
+   сабмодуль `templates` подключён как `lib`, команда выглядит так:
+
+```bat
+call "lib\tools\firmware-publish\PUBLISH_FIRMWARE.bat" --config "firmware-release.cmd" --preflight
+```
+
+В **Options for Target → User → After Build/Rebuild** можно добавить эту же
+команду с `--preflight`. Если Keil запускает её из каталога `mdk`, передайте
+явный путь к конфигурации, например `--config "..\firmware-release.cmd"`.
+
+Не ставьте `--publish` в post-build: иначе обычная сборка станет внешней
+операцией и сможет перезаписать опубликованную версию.
+
+## Code Composer Studio 12 / C2000
+
+SETGUI не преобразует `.out`. Для активной конфигурации **Debug и/или Release**
+включите **C2000 Hex Utility** и сформируйте загрузочный `.bin`. Для SCI8 boot
+TMS320F2812 используются параметры проекта:
+
+```text
+--binary
+--boot
+--sci8
+```
+
+Выход удобно складывать в `bin\${BuildArtifactFileBaseName}.bin`. Затем укажите
+этот путь в `FW_IMAGE`, `tms` в `FW_TRANSPORTS`, а `FW_BASE_ADDRESS` оставьте
+пустым.
+
+После Build выполните:
+
+```bat
+call "..\newProject\templates\tools\firmware-publish\PUBLISH_FIRMWARE.bat" --config "firmware-release.cmd" --preflight
+```
+
+Команда выше соответствует текущей раскладке `SETGIT\BALZAM_ALL` и
+`SETGIT\newProject\templates`. Если `templates` подключён в сам проект как
+`lib\templates`, используйте `lib\templates\tools\firmware-publish\...`.
+
+При желании ту же команду можно добавить в **Project Properties → Build →
+Steps → Post-build steps**. В конфигурации CCS, где Hex Utility не включён,
+файл `.bin` не обновится — это особенно важно отдельно проверить для Release.
+
+## Выпуск
+
+Рабочая последовательность одинакова для обеих IDE:
+
+```bat
+rem 1. Собрать Release в IDE.
+
+rem 2. Проверить метаданные, размер, имя, SHA-256 и запись каталога без сети.
+call "lib\tools\firmware-publish\PUBLISH_FIRMWARE.bat" --config "firmware-release.cmd" --preflight
+
+rem 3. Закоммитить исходники выпуска и опубликовать.
+call "lib\tools\firmware-publish\PUBLISH_FIRMWARE.bat" --config "firmware-release.cmd" --publish
+```
+
+Перед публикацией скрипт показывает все параметры, проверяет tracked-файлы
+Git и просит подтверждение. `--allow-dirty` осознанно разрешает публикацию из
+изменённого worktree, а `--yes` отключает только интерактивное подтверждение
+для доверенного CI:
+
+```bat
+call PUBLISH_FIRMWARE.bat --publish --yes --allow-dirty
+```
+
+Повторная публикация той же комбинации `product + versionCode + transport`
+заменяет запись каталога. Новый `versionCode` добавляет новую версию. Если при
+нескольких транспортах сеть оборвалась посередине, исправьте причину и повторите
+ту же команду: уже опубликованные записи будут безопасно заменены теми же
+данными.
+
+## Контроль после публикации
+
+Успешное завершение означает, что образ:
+
+- загружен как asset выпуска;
+- скачан обратно и совпал по SHA-256;
+- записан в `firmware.releases` файла `update.json`;
+- повторно прочитан и разобран тем же кодом, который использует SETGUI.
+
+После этого откройте в SETGUI **Версия и обновление → База прошивок → Обновить
+каталог** и проверьте изделие, версию и транспорт. Для окончательной проверки
+выполните загрузку на тестовое устройство именно тем транспортом, который
+указан в записи.
+
+## Частые ошибки
+
+| Сообщение | Что проверить |
+|---|---|
+| `firmware image not found` | Сборка завершилась успешно, `FW_IMAGE` задан относительно конфигурации, нужная конфигурация IDE создаёт `.hex/.bin`. |
+| `SETGUI was not found` | Исправьте `FW_SETGUI_ROOT`. |
+| `Missing build environment: .venv` | Создайте окружение SETGUI и установите зависимости проекта. |
+| Ошибка авторизации Gitea | Заново сохраните логин и токен в SETGUI; не записывайте токен в `.cmd`. |
+| `tracked project files differ from HEAD` | Закоммитьте точные исходники выпуска либо осознанно добавьте `--allow-dirty`. |
+| Версия не видна в SETGUI | Нажмите «Обновить каталог» и проверьте точное значение `FW_PRODUCT` и поддерживаемый выбранным устройством транспорт. |
--- a/tools/firmware-publish/examples/ccs12-firmware-release.cmd
+++ b/tools/firmware-publish/examples/ccs12-firmware-release.cmd
@@ -0,0 +1,15 @@
+@echo off
+rem Copy this file to the firmware repository root as firmware-release.cmd.
+
+set "FW_PROJECT_ROOT=%~dp0"
+rem This relative path matches SETGIT/BALZAM_ALL + SETGIT/newProject/SETGUI.
+rem Change it if the repositories are stored differently.
+set "FW_SETGUI_ROOT=%~dp0..\newProject\SETGUI"
+
+set "FW_PRODUCT=BALZAM-166"
+set "FW_VERSION=1.0.0"
+set "FW_VERSION_CODE=0x00010000"
+set "FW_TRANSPORTS=tms"
+set "FW_BASE_ADDRESS="
+set "FW_IMAGE=ccs12_8_proj\bin\balzam_166_ccs12_8.bin"
+set "FW_NOTES=TMS320F2812 SCI8 boot image"
--- a/tools/firmware-publish/examples/keil-firmware-release.cmd
+++ b/tools/firmware-publish/examples/keil-firmware-release.cmd
@@ -0,0 +1,13 @@
+@echo off
+rem Copy this file to the firmware repository root as firmware-release.cmd.
+
+set "FW_PROJECT_ROOT=%~dp0"
+set "FW_SETGUI_ROOT=%~dp0..\SETGUI"
+
+set "FW_PRODUCT=F103DS18"
+set "FW_VERSION=1.1.0"
+set "FW_VERSION_CODE=0x00010100"
+set "FW_TRANSPORTS=can rs485"
+set "FW_BASE_ADDRESS=0x08003000"
+set "FW_IMAGE=mdk\build\ds18b20_f103.hex"
+set "FW_NOTES=DS18B20 firmware release"