diff --git a/RULES.md b/RULES.md
new file mode 100644
index 0000000..d2bf731
--- /dev/null
+++ b/RULES.md
@@ -0,0 +1,80 @@
+# Правила общего кроссплатформенного кода
+
+Этот репозиторий — единственный источник общих алгоритмов для `GUI_Android`,
+`SETGUI`, прошивок и будущих GUI. Копирование одной реализации между Kotlin,
+Python, C# или другим языком запрещено.
+
+## 1. Граница C-ядра и порта
+
+В `c/set-protocol` на C99 обязательно размещаются:
+
+- форматы кадров и идентификаторов, CRC/checksum, endian-преобразования;
+- построение команд, разбор и проверка ответов;
+- автоматы обмена, сегментация, повтор, таймаутные состояния без системных часов;
+- общие вычисления, таблицы и каталоги, влияющие на поведение протокола;
+- проверка образов прошивки и других бинарных форматов.
+
+Порт на языке GUI содержит только:
+
+- вызовы C через стабильный ABI (`ctypes`, JNI, P/Invoke, Swift FFI и т. п.);
+- преобразование C-структур в модели языка без повторения алгоритма;
+- работу с USB, COM, Bluetooth, SocketCAN и API операционной системы;
+- жизненный цикл, потоки, разрешения, хранение настроек и UI;
+- локализованный текст и чисто визуальные преобразования.
+
+Порт не вычисляет CRC, не собирает wire-пакет и не разбирает его поля заново.
+Если для функции C-ядро недоступно, приложение сообщает об ошибке сборки или
+загрузки. Алгоритмический fallback на языке GUI запрещён: он снова создаёт две
+версии протокола.
+
+## 2. Разделение контроллеров
+
+Профили контроллеров нельзя сливать по совпадению названия транспорта:
+
+- **ПМ67 / TMS320F2812** — основной контроллер, собственные RS и CAN;
+- **ПМ35 / TMS320F28335 periph** — отдельный контроллер и отдельный CAN для
+  настроечного терминала, а также собственный прямой RS232/485-протокол.
+
+Выбор профиля выполняется в GUI, но выбранный профиль вызывает свой отдельный
+модуль C-ядра. Наличие одной CAN-линии не даёт права удалить или подменить
+другую.
+
+## 3. Порядок изменения протокола
+
+1. Добавить или изменить публичный заголовок и реализацию в
+   `c/set-protocol/include` и `c/set-protocol/src`.
+2. Зафиксировать эталонные байты и ошибочные случаи в C-тесте.
+3. При необходимости расширить `pcan_abi.h`, сохраняя бинарную совместимость.
+4. Добавить тонкие порты в `ports/<platform>` и `python/`; в них не должно быть
+   второго кодека.
+5. Одними и теми же векторами проверить C, Python и Android/JVM.
+6. Собрать SETGUI и Android с одним commit submodule `templates`.
+
+Изменение только в одном GUI считается незавершённым. Сначала меняется
+`templates`, затем оба потребителя обновляют ссылку submodule на проверенный
+commit.
+
+## 4. Требования к C-ядру
+
+- C99, без зависимости от GUI и конкретной ОС.
+- Буферы и их размеры передаются явно; владение памятью остаётся у вызывающего.
+- Для MCU основная логика не требует heap, исключений или файловой системы.
+- Endian и размеры целых задаются через `stdint.h`, структуры wire-формата не
+  передаются через ABI без явного стабильного представления.
+- Экспорт shared library идёт через `PCAN_ABI_API`; существующие символы не
+  меняют смысл и сигнатуру.
+- Ошибки возвращаются детерминированным кодом и тестируются наряду с успехом.
+
+## 5. Проверка на ревью
+
+Изменение нельзя принимать, если ответ «да» хотя бы на один вопрос:
+
+- появился одинаковый CRC/parser/builder в двух языках;
+- UI знает byte offset, endian или служебный байт wire-протокола;
+- Python и Kotlin содержат одинаковую таблицу команд, влияющую на обмен;
+- добавлен тихий fallback, поведение которого отличается от C;
+- обновлён один GUI без обновления и теста `templates`;
+- ПМ67 и ПМ35 сведены к одному соединению или одному состоянию контроллера.
+
+Текущее состояние и очередь переноса перечислены в
+[`doc/CROSS_PLATFORM_AUDIT.md`](doc/CROSS_PLATFORM_AUDIT.md).
diff --git a/c/set-protocol/CMakeLists.txt b/c/set-protocol/CMakeLists.txt
index 30dc23a..b0f027d 100644
--- a/c/set-protocol/CMakeLists.txt
+++ b/c/set-protocol/CMakeLists.txt
@@ -18,6 +18,7 @@ set(SETPROTOCOL_V2_SOURCES
 # Совместимые ProtoCAN/SETGUI v1 форматы переходного периода.
 set(SETPROTOCOL_LEGACY_SOURCES
     src/balsam_can.c
+    src/periph28335.c
     src/gui_catalog.c
     src/gui_frame.c
     src/pcan_abi.c
@@ -98,6 +99,9 @@ if(SETP_BUILD_TESTS)
     add_executable(test_balsam_can tests/test_balsam_can.c)
     target_link_libraries(test_balsam_can PRIVATE setprotocol_static)
     add_test(NAME legacy_balsam_can COMMAND test_balsam_can)
+    add_executable(test_periph28335 tests/test_periph28335.c)
+    target_link_libraries(test_periph28335 PRIVATE setprotocol_static)
+    add_test(NAME shared_periph28335 COMMAND test_periph28335)
     add_executable(test_trends tests/test_trends.c)
     target_link_libraries(test_trends PRIVATE setprotocol_static)
     add_test(NAME shared_trends COMMAND test_trends)
diff --git a/c/set-protocol/include/pcan_abi.h b/c/set-protocol/include/pcan_abi.h
index 4ce3b03..2205331 100644
--- a/c/set-protocol/include/pcan_abi.h
+++ b/c/set-protocol/include/pcan_abi.h
@@ -73,6 +73,34 @@ PCAN_ABI_API const char *pcan_abi_balsam_device_name(uint8_t device);
 PCAN_ABI_API size_t pcan_abi_balsam_register_name(
     uint8_t device, uint16_t address, char *output, size_t output_size);
 
+/* PM35/TMS320F28335 direct RS232/485 register terminal. */
+PCAN_ABI_API uint16_t pcan_abi_periph28335_crc16(
+    const uint8_t *data, size_t size);
+PCAN_ABI_API size_t pcan_abi_periph28335_append_crc(
+    const uint8_t *payload, size_t payload_size,
+    uint8_t *output, size_t output_size);
+PCAN_ABI_API size_t pcan_abi_periph28335_build_read(
+    uint8_t controller, uint16_t start, uint16_t count,
+    uint8_t *output, size_t output_size);
+PCAN_ABI_API size_t pcan_abi_periph28335_build_write(
+    uint8_t controller, uint16_t address, uint16_t value,
+    uint8_t *output, size_t output_size);
+PCAN_ABI_API size_t pcan_abi_periph28335_build_command(
+    uint8_t controller, uint8_t command_index,
+    uint8_t *output, size_t output_size);
+PCAN_ABI_API size_t pcan_abi_periph28335_expected_read_size(uint16_t count);
+PCAN_ABI_API int pcan_abi_periph28335_decode_read(
+    const uint8_t *data, size_t size, uint8_t controller, uint16_t count,
+    uint16_t *output, size_t output_count);
+PCAN_ABI_API int pcan_abi_periph28335_validate_write(
+    const uint8_t *response, size_t response_size,
+    const uint8_t *request, size_t request_size);
+PCAN_ABI_API size_t pcan_abi_periph28335_project_count(void);
+PCAN_ABI_API const char *pcan_abi_periph28335_project_name(
+    size_t project_index);
+PCAN_ABI_API const char *pcan_abi_periph28335_command_name(
+    size_t project_index, size_t command_index);
+
 PCAN_ABI_API size_t pcan_abi_frame_encode(uint8_t sequence, uint8_t flags,
                                           uint32_t can_id,
                                           const uint8_t *data, uint8_t dlc,
diff --git a/c/set-protocol/include/periph28335.h b/c/set-protocol/include/periph28335.h
new file mode 100644
index 0000000..408353e
--- /dev/null
+++ b/c/set-protocol/include/periph28335.h
@@ -0,0 +1,68 @@
+/**
+ * @file periph28335.h
+ * @brief Shared PM35/TMS320F28335 register protocol.
+ *
+ * The protocol is independent from PM67/TMS320F2812 CAN and RS channels.
+ * It implements the direct RS232/485 register terminal used by PM35.
+ */
+#ifndef PERIPH28335_H
+#define PERIPH28335_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define PERIPH28335_REGISTER_COUNT 128U
+#define PERIPH28335_REQUEST_SIZE 8U
+#define PERIPH28335_COMMAND_COUNT 17U
+
+typedef enum {
+    PERIPH28335_OK = 0,
+    PERIPH28335_ERROR_ARGUMENT = -1,
+    PERIPH28335_ERROR_RANGE = -2,
+    PERIPH28335_ERROR_LENGTH = -3,
+    PERIPH28335_ERROR_CRC = -4,
+    PERIPH28335_ERROR_HEADER = -5,
+    PERIPH28335_ERROR_CAPACITY = -6
+} periph28335_status_t;
+
+uint16_t periph28335_crc16_modbus(const uint8_t *data, size_t size);
+
+size_t periph28335_append_crc(const uint8_t *payload, size_t payload_size,
+                              uint8_t *output, size_t output_size);
+
+size_t periph28335_build_read_registers(
+    uint8_t controller, uint16_t start, uint16_t count,
+    uint8_t *output, size_t output_size);
+
+size_t periph28335_build_write_register(
+    uint8_t controller, uint16_t address, uint16_t value,
+    uint8_t *output, size_t output_size);
+
+size_t periph28335_build_command(
+    uint8_t controller, uint8_t command_index,
+    uint8_t *output, size_t output_size);
+
+size_t periph28335_expected_read_response_size(uint16_t count);
+
+int periph28335_decode_read_response(
+    const uint8_t *data, size_t size, uint8_t controller, uint16_t count,
+    uint16_t *output, size_t output_count);
+
+int periph28335_validate_write_response(
+    const uint8_t *response, size_t response_size,
+    const uint8_t *request, size_t request_size);
+
+size_t periph28335_project_count(void);
+const char *periph28335_project_name(size_t project_index);
+const char *periph28335_command_name(size_t project_index,
+                                     size_t command_index);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* PERIPH28335_H */
diff --git a/c/set-protocol/include/setprotocol.h b/c/set-protocol/include/setprotocol.h
index a680583..03520c3 100644
--- a/c/set-protocol/include/setprotocol.h
+++ b/c/set-protocol/include/setprotocol.h
@@ -6,6 +6,7 @@
 #define SETPROTOCOL_H
 
 #include "balsam_can.h"
+#include "periph28335.h"
 
 /* Основной SET protocol v2. */
 #include "set_protocol.h"
diff --git a/c/set-protocol/ports/android/Android.mk b/c/set-protocol/ports/android/Android.mk
index e25efce..9eceeb8 100644
--- a/c/set-protocol/ports/android/Android.mk
+++ b/c/set-protocol/ports/android/Android.mk
@@ -13,6 +13,7 @@ LOCAL_SRC_FILES := \
     ../../src/set_trends.c \
     ../../src/set_spectrum.c \
     ../../src/balsam_can.c \
+    ../../src/periph28335.c \
     ../../src/gui_catalog.c \
     ../../src/gui_frame.c \
     ../../src/pcan_abi.c \
diff --git a/c/set-protocol/ports/android/kotlin/ru/setcorp/setprotocol/NativeSetProtocol.kt b/c/set-protocol/ports/android/kotlin/ru/setcorp/setprotocol/NativeSetProtocol.kt
index 5e45407..8aa7255 100644
--- a/c/set-protocol/ports/android/kotlin/ru/setcorp/setprotocol/NativeSetProtocol.kt
+++ b/c/set-protocol/ports/android/kotlin/ru/setcorp/setprotocol/NativeSetProtocol.kt
@@ -4,7 +4,10 @@ package ru.setcorp.setprotocol
 object NativeSetProtocol {
     val available: Boolean by lazy {
         runCatching {
-            System.loadLibrary("setprotocol")
+            val hostLibrary = System.getProperty("setprotocol.library")
+                ?: System.getProperty("setplot.library")
+            if (hostLibrary != null) System.load(hostLibrary)
+            else System.loadLibrary("setprotocol")
             nativeAbiVersion() == 1
         }.getOrDefault(false)
     }
@@ -32,6 +35,17 @@ object NativeSetProtocol {
     external fun nativeBalsamDecode(canId: Long, input: ByteArray): IntArray?
     external fun nativeBalsamDeviceName(device: Int): String
     external fun nativeBalsamRegisterName(device: Int, address: Int): String
+    external fun nativePeriph28335Crc16(input: ByteArray): Int
+    external fun nativePeriph28335AppendCrc(input: ByteArray): ByteArray?
+    external fun nativePeriph28335BuildRead(controller: Int, start: Int, count: Int): ByteArray?
+    external fun nativePeriph28335BuildWrite(controller: Int, address: Int, value: Int): ByteArray?
+    external fun nativePeriph28335BuildCommand(controller: Int, commandIndex: Int): ByteArray?
+    external fun nativePeriph28335ExpectedReadSize(count: Int): Int
+    external fun nativePeriph28335DecodeRead(input: ByteArray, controller: Int, count: Int): IntArray?
+    external fun nativePeriph28335ValidateWrite(response: ByteArray, request: ByteArray): Int
+    external fun nativePeriph28335ProjectCount(): Int
+    external fun nativePeriph28335ProjectName(projectIndex: Int): String?
+    external fun nativePeriph28335CommandName(projectIndex: Int, commandIndex: Int): String?
     external fun nativeEncodeFrame(
         sequence: Int,
         flags: Int,
diff --git a/c/set-protocol/ports/android/kotlin/ru/setcorp/setprotocol/periph28335/Periph28335Protocol.kt b/c/set-protocol/ports/android/kotlin/ru/setcorp/setprotocol/periph28335/Periph28335Protocol.kt
index a08a149..0856830 100644
--- a/c/set-protocol/ports/android/kotlin/ru/setcorp/setprotocol/periph28335/Periph28335Protocol.kt
+++ b/c/set-protocol/ports/android/kotlin/ru/setcorp/setprotocol/periph28335/Periph28335Protocol.kt
@@ -1,37 +1,42 @@
 package ru.setcorp.setprotocol.periph28335
 
-/** Shared wire protocol migrated from Set_Terminal_28335/DTrans.pas and UNiiefa.pas. */
+import ru.setcorp.setprotocol.NativeSetProtocol
+
+/** Kotlin UI adapter; all PM35 wire logic and the command catalog live in C99. */
 object Periph28335Protocol {
     const val REGISTER_COUNT = 128
     const val DEFAULT_CONTROLLER = 16
     const val DEFAULT_BAUD_RATE = 115_200
 
-    val projectCommands: Map<String, List<String>> = linkedMapOf(
-        "По умолчанию" to listOf("Test", "Def", "Save", "Load", "Calibr", "Calcul", "Secret", "Light", "Raw", "-", "-", "-", "-", "-", "-", "Reset", "Nothing at all"),
-        "23470" to listOf("Test", "Def", "Save", "Load", "Calibr", "Read", "Secret", "-", "-", "-", "-", "-", "-", "-", "-", "Reset", "Nothing at all"),
-        "23550" to listOf("Test", "Def", "Save", "Load", "Calibr", "Read", "Secret", "Send", "-", "-", "-", "-", "-", "-", "-", "Reset", "Nothing at all"),
-        "23550.2" to listOf("Test", "Def", "Save", "Load", "Calibr", "Calcul", "Secret", "Send", "Raw", "Beep", "", "", "", "", "Log", "Reset", "Nothing at all"),
-        "ICE 22220.1-3" to listOf("Test", "Zero", "Save", "Def", "Calibr", "Read", "ExtLamp", "ExtLite", "-", "-", "-", "-", "-", "-", "-", "Reset", "Nothing at all"),
-        "ICE 22220.4-5" to listOf("Test", "Def", "Save", "Load", "Raw", "Read", "ExtLamp", "ExtLite", "No log", "-", "-", "-", "-", "-", "-", "Reset", "Nothing at all"),
-        "Бальзам 161" to listOf("Test", "Zero", "Save", "Def", "Calibr", "Clbr 400", "Stop", "Start", "Init", "Secret", "-", "-", "-", "-", "-", "Reset", "Nothing at all"),
-        "Бальзам 162" to listOf("Test", "Def", "Save", "Load", "Calibr", "Secret", "Stop", "Start", "Init", "Tune", "-", "-", "-", "-", "-", "Reset", "Nothing at all"),
-        "Бальзам 163" to listOf("Test", "Def", "Save", "Load", "Calibr", "Calcul", "Stop", "Start", "Init", "Tune", "Secret", "-", "-", "-", "-", "Reset", "Nothing at all"),
-    )
-
-    fun crc16Modbus(data: ByteArray, initial: Int = 0xFFFF): Int {
-        var crc = initial and 0xFFFF
-        data.forEach { value ->
-            crc = crc xor (value.toInt() and 0xFF)
-            repeat(8) {
-                crc = if (crc and 1 != 0) (crc ushr 1) xor 0xA001 else crc ushr 1
+    val projectCommands: Map<String, List<String>> by lazy {
+        requireNative()
+        buildMap {
+            repeat(NativeSetProtocol.nativePeriph28335ProjectCount()) { project ->
+                val name = requireNotNull(
+                    NativeSetProtocol.nativePeriph28335ProjectName(project),
+                ) { "Повреждён каталог проектов ПМ35" }
+                put(name, List(17) { command ->
+                    requireNotNull(
+                        NativeSetProtocol.nativePeriph28335CommandName(project, command),
+                    ) { "Повреждён каталог команд ПМ35" }
+                })
             }
         }
-        return crc and 0xFFFF
+    }
+
+    fun crc16Modbus(data: ByteArray, initial: Int = 0xFFFF): Int {
+        require(initial == 0xFFFF) {
+            "Произвольное начальное значение CRC не входит в протокол ПМ35"
+        }
+        requireNative()
+        return NativeSetProtocol.nativePeriph28335Crc16(data)
     }
 
     fun withCrc(payload: ByteArray): ByteArray {
-        val crc = crc16Modbus(payload)
-        return payload + byteArrayOf(crc.toByte(), (crc ushr 8).toByte())
+        requireNative()
+        return requireNotNull(NativeSetProtocol.nativePeriph28335AppendCrc(payload)) {
+            "SETProtocol отклонил данные ПМ35"
+        }
     }
 
     fun buildReadRegisters(controller: Int, start: Int, count: Int): ByteArray {
@@ -40,50 +45,51 @@ object Periph28335Protocol {
         require(count in 1..REGISTER_COUNT && start + count <= REGISTER_COUNT) {
             "Диапазон регистров должен находиться в 0..127"
         }
-        return withCrc(byteArrayOf(
-            controller.toByte(), 3,
-            (start ushr 8).toByte(), start.toByte(),
-            (count ushr 8).toByte(), count.toByte(),
-        ))
+        requireNative()
+        return requireNotNull(
+            NativeSetProtocol.nativePeriph28335BuildRead(controller, start, count),
+        ) { "SETProtocol отклонил запрос чтения ПМ35" }
     }
 
     fun buildWriteRegister(controller: Int, address: Int, value: Int): ByteArray {
         requireRange("Адрес контроллера", controller, 0xFF)
         requireRange("Адрес регистра", address, REGISTER_COUNT - 1)
         requireRange("Значение", value, 0xFFFF)
-        return withCrc(byteArrayOf(
-            controller.toByte(), 6,
-            (address ushr 8).toByte(), address.toByte(),
-            (value ushr 8).toByte(), value.toByte(),
-        ))
+        requireNative()
+        return requireNotNull(
+            NativeSetProtocol.nativePeriph28335BuildWrite(controller, address, value),
+        ) { "SETProtocol отклонил запрос записи ПМ35" }
     }
 
     fun buildCommand(controller: Int, commandIndex: Int): ByteArray {
         require(commandIndex in 0..16) { "Номер команды должен быть в диапазоне 0..16" }
-        return buildWriteRegister(controller, 127, if (commandIndex < 16) 1 shl commandIndex else 0)
+        requireNative()
+        return requireNotNull(
+            NativeSetProtocol.nativePeriph28335BuildCommand(controller, commandIndex),
+        ) { "SETProtocol отклонил команду ПМ35" }
     }
 
     fun expectedReadResponseSize(count: Int): Int {
         require(count in 1..REGISTER_COUNT)
-        return count * 2 + 5
+        requireNative()
+        return NativeSetProtocol.nativePeriph28335ExpectedReadSize(count)
     }
 
     fun decodeReadResponse(data: ByteArray, controller: Int, count: Int): List<Int> {
         val expected = expectedReadResponseSize(count)
         require(data.size == expected) { "Ожидалось $expected байт, получено ${data.size}" }
-        validateCrc(data)
-        require(data[0].toInt() and 0xFF == controller) { "Ответ другого контроллера" }
-        require(data[1].toInt() and 0xFF == 3) { "Неверная функция ответа" }
-        require(data[2].toInt() and 0xFF == count * 2) { "Неверная длина данных ответа" }
-        return (0 until count).map { index ->
-            val offset = 3 + index * 2
-            ((data[offset].toInt() and 0xFF) shl 8) or (data[offset + 1].toInt() and 0xFF)
-        }
+        requireNative()
+        return requireNotNull(
+            NativeSetProtocol.nativePeriph28335DecodeRead(data, controller, count),
+        ) { "Повреждён ответ ПМ35: заголовок, длина или CRC" }.toList()
     }
 
-    fun validateWriteResponse(data: ByteArray, request: ByteArray): Boolean =
-        data.size == 8 && request.size == 8 && data.contentEquals(request) && runCatching { validateCrc(data) }.isSuccess
+    fun validateWriteResponse(data: ByteArray, request: ByteArray): Boolean {
+        requireNative()
+        return NativeSetProtocol.nativePeriph28335ValidateWrite(data, request) == 0
+    }
 
+    // Presentation-only conversions stay in the GUI port; they do not define wire bytes.
     fun bitsLsbFirst(value: Int): List<Boolean> {
         requireRange("Значение", value, 0xFFFF)
         return (0 until 16).map { bit -> value and (1 shl bit) != 0 }
@@ -91,7 +97,9 @@ object Periph28335Protocol {
 
     fun wordFromBits(bits: List<Boolean>): Int {
         require(bits.size == 16) { "Должно быть ровно 16 бит" }
-        return bits.foldIndexed(0) { bit, value, checked -> if (checked) value or (1 shl bit) else value }
+        return bits.foldIndexed(0) { bit, value, checked ->
+            if (checked) value or (1 shl bit) else value
+        }
     }
 
     fun signedWord(value: Int): Int {
@@ -99,11 +107,8 @@ object Periph28335Protocol {
         return if (value < 0x8000) value else value - 0x10000
     }
 
-    private fun validateCrc(data: ByteArray) {
-        require(data.size >= 2)
-        val expected = crc16Modbus(data.copyOf(data.size - 2))
-        val actual = (data[data.lastIndex - 1].toInt() and 0xFF) or ((data.last().toInt() and 0xFF) shl 8)
-        require(actual == expected) { "Ошибка CRC ответа" }
+    private fun requireNative() {
+        check(NativeSetProtocol.available) { "Нативное ядро SETProtocol недоступно" }
     }
 
     private fun requireRange(name: String, value: Int, maximum: Int) {
diff --git a/c/set-protocol/ports/android/setprotocol_jni.c b/c/set-protocol/ports/android/setprotocol_jni.c
index 1b5c5a0..7f916f7 100644
--- a/c/set-protocol/ports/android/setprotocol_jni.c
+++ b/c/set-protocol/ports/android/setprotocol_jni.c
@@ -7,6 +7,182 @@
 #include "set_trends.h"
 #include "set_spectrum.h"
 #include "balsam_can.h"
+#include "periph28335.h"
+
+JNIEXPORT jint JNICALL
+Java_ru_setcorp_setprotocol_NativeSetProtocol_nativePeriph28335Crc16(
+    JNIEnv *env, jobject self, jbyteArray input)
+{
+    (void)self;
+    if (input == NULL) return 0;
+    jsize size = (*env)->GetArrayLength(env, input);
+    jbyte *data = (*env)->GetByteArrayElements(env, input, NULL);
+    if ((data == NULL) && (size != 0)) return 0;
+    uint16_t crc = periph28335_crc16_modbus((const uint8_t *)data, (size_t)size);
+    if (data != NULL) (*env)->ReleaseByteArrayElements(env, input, data, JNI_ABORT);
+    return (jint)crc;
+}
+
+JNIEXPORT jbyteArray JNICALL
+Java_ru_setcorp_setprotocol_NativeSetProtocol_nativePeriph28335AppendCrc(
+    JNIEnv *env, jobject self, jbyteArray input)
+{
+    (void)self;
+    if (input == NULL) return NULL;
+    jsize size = (*env)->GetArrayLength(env, input);
+    jbyte *data = (*env)->GetByteArrayElements(env, input, NULL);
+    if ((data == NULL) && (size != 0)) return NULL;
+    uint8_t *output = (uint8_t *)malloc((size_t)size + 2U);
+    if (output == NULL) {
+        if (data != NULL) (*env)->ReleaseByteArrayElements(env, input, data, JNI_ABORT);
+        return NULL;
+    }
+    size_t written = periph28335_append_crc(
+        (const uint8_t *)data, (size_t)size, output, (size_t)size + 2U);
+    if (data != NULL) (*env)->ReleaseByteArrayElements(env, input, data, JNI_ABORT);
+    if (written == 0U) { free(output); return NULL; }
+    jbyteArray result = (*env)->NewByteArray(env, (jsize)written);
+    if (result != NULL) (*env)->SetByteArrayRegion(
+        env, result, 0, (jsize)written, (const jbyte *)output);
+    free(output);
+    return result;
+}
+
+JNIEXPORT jbyteArray JNICALL
+Java_ru_setcorp_setprotocol_NativeSetProtocol_nativePeriph28335BuildRead(
+    JNIEnv *env, jobject self, jint controller, jint start, jint count)
+{
+    (void)self;
+    uint8_t output[PERIPH28335_REQUEST_SIZE];
+    if (controller < 0 || controller > 255 || start < 0 || start > 65535 ||
+        count < 0 || count > 65535) return NULL;
+    size_t written = periph28335_build_read_registers(
+        (uint8_t)controller, (uint16_t)start, (uint16_t)count,
+        output, sizeof output);
+    if (written == 0U) return NULL;
+    jbyteArray result = (*env)->NewByteArray(env, (jsize)written);
+    if (result != NULL) (*env)->SetByteArrayRegion(
+        env, result, 0, (jsize)written, (const jbyte *)output);
+    return result;
+}
+
+JNIEXPORT jbyteArray JNICALL
+Java_ru_setcorp_setprotocol_NativeSetProtocol_nativePeriph28335BuildWrite(
+    JNIEnv *env, jobject self, jint controller, jint address, jint value)
+{
+    (void)self;
+    uint8_t output[PERIPH28335_REQUEST_SIZE];
+    if (controller < 0 || controller > 255 || address < 0 || address > 65535 ||
+        value < 0 || value > 65535) return NULL;
+    size_t written = periph28335_build_write_register(
+        (uint8_t)controller, (uint16_t)address, (uint16_t)value,
+        output, sizeof output);
+    if (written == 0U) return NULL;
+    jbyteArray result = (*env)->NewByteArray(env, (jsize)written);
+    if (result != NULL) (*env)->SetByteArrayRegion(
+        env, result, 0, (jsize)written, (const jbyte *)output);
+    return result;
+}
+
+JNIEXPORT jbyteArray JNICALL
+Java_ru_setcorp_setprotocol_NativeSetProtocol_nativePeriph28335BuildCommand(
+    JNIEnv *env, jobject self, jint controller, jint command_index)
+{
+    (void)self;
+    uint8_t output[PERIPH28335_REQUEST_SIZE];
+    if (controller < 0 || controller > 255 || command_index < 0 || command_index > 255) return NULL;
+    size_t written = periph28335_build_command(
+        (uint8_t)controller, (uint8_t)command_index, output, sizeof output);
+    if (written == 0U) return NULL;
+    jbyteArray result = (*env)->NewByteArray(env, (jsize)written);
+    if (result != NULL) (*env)->SetByteArrayRegion(
+        env, result, 0, (jsize)written, (const jbyte *)output);
+    return result;
+}
+
+JNIEXPORT jint JNICALL
+Java_ru_setcorp_setprotocol_NativeSetProtocol_nativePeriph28335ExpectedReadSize(
+    JNIEnv *env, jobject self, jint count)
+{
+    (void)env; (void)self;
+    if (count < 0 || count > 65535) return 0;
+    return (jint)periph28335_expected_read_response_size((uint16_t)count);
+}
+
+JNIEXPORT jintArray JNICALL
+Java_ru_setcorp_setprotocol_NativeSetProtocol_nativePeriph28335DecodeRead(
+    JNIEnv *env, jobject self, jbyteArray input, jint controller, jint count)
+{
+    (void)self;
+    if (input == NULL || controller < 0 || controller > 255 ||
+        count < 1 || count > (jint)PERIPH28335_REGISTER_COUNT) return NULL;
+    jsize size = (*env)->GetArrayLength(env, input);
+    jbyte *data = (*env)->GetByteArrayElements(env, input, NULL);
+    if ((data == NULL) && (size != 0)) return NULL;
+    uint16_t words[PERIPH28335_REGISTER_COUNT];
+    int status = periph28335_decode_read_response(
+        (const uint8_t *)data, (size_t)size, (uint8_t)controller,
+        (uint16_t)count, words, PERIPH28335_REGISTER_COUNT);
+    if (data != NULL) (*env)->ReleaseByteArrayElements(env, input, data, JNI_ABORT);
+    if (status != PERIPH28335_OK) return NULL;
+    jint values[PERIPH28335_REGISTER_COUNT];
+    for (jint index = 0; index < count; ++index) values[index] = words[index];
+    jintArray result = (*env)->NewIntArray(env, count);
+    if (result != NULL) (*env)->SetIntArrayRegion(env, result, 0, count, values);
+    return result;
+}
+
+JNIEXPORT jint JNICALL
+Java_ru_setcorp_setprotocol_NativeSetProtocol_nativePeriph28335ValidateWrite(
+    JNIEnv *env, jobject self, jbyteArray response, jbyteArray request)
+{
+    (void)self;
+    if (response == NULL || request == NULL) return PERIPH28335_ERROR_ARGUMENT;
+    jsize response_size = (*env)->GetArrayLength(env, response);
+    jsize request_size = (*env)->GetArrayLength(env, request);
+    jbyte *response_data = (*env)->GetByteArrayElements(env, response, NULL);
+    jbyte *request_data = (*env)->GetByteArrayElements(env, request, NULL);
+    if (response_data == NULL || request_data == NULL) {
+        if (response_data != NULL) (*env)->ReleaseByteArrayElements(env, response, response_data, JNI_ABORT);
+        if (request_data != NULL) (*env)->ReleaseByteArrayElements(env, request, request_data, JNI_ABORT);
+        return PERIPH28335_ERROR_ARGUMENT;
+    }
+    int status = periph28335_validate_write_response(
+        (const uint8_t *)response_data, (size_t)response_size,
+        (const uint8_t *)request_data, (size_t)request_size);
+    (*env)->ReleaseByteArrayElements(env, response, response_data, JNI_ABORT);
+    (*env)->ReleaseByteArrayElements(env, request, request_data, JNI_ABORT);
+    return status;
+}
+
+JNIEXPORT jint JNICALL
+Java_ru_setcorp_setprotocol_NativeSetProtocol_nativePeriph28335ProjectCount(
+    JNIEnv *env, jobject self)
+{
+    (void)env; (void)self;
+    return (jint)periph28335_project_count();
+}
+
+JNIEXPORT jstring JNICALL
+Java_ru_setcorp_setprotocol_NativeSetProtocol_nativePeriph28335ProjectName(
+    JNIEnv *env, jobject self, jint project_index)
+{
+    (void)self;
+    const char *name = project_index >= 0
+        ? periph28335_project_name((size_t)project_index) : NULL;
+    return name != NULL ? (*env)->NewStringUTF(env, name) : NULL;
+}
+
+JNIEXPORT jstring JNICALL
+Java_ru_setcorp_setprotocol_NativeSetProtocol_nativePeriph28335CommandName(
+    JNIEnv *env, jobject self, jint project_index, jint command_index)
+{
+    (void)self;
+    const char *name = project_index >= 0 && command_index >= 0
+        ? periph28335_command_name((size_t)project_index, (size_t)command_index)
+        : NULL;
+    return name != NULL ? (*env)->NewStringUTF(env, name) : NULL;
+}
 
 JNIEXPORT jintArray JNICALL
 Java_ru_setcorp_setprotocol_NativeSetProtocol_nativeBalsamDecode(
diff --git a/c/set-protocol/src/pcan_abi.c b/c/set-protocol/src/pcan_abi.c
index 8094e42..adf58a1 100644
--- a/c/set-protocol/src/pcan_abi.c
+++ b/c/set-protocol/src/pcan_abi.c
@@ -4,6 +4,7 @@
 
 #include "pcan_crc.h"
 #include "balsam_can.h"
+#include "periph28335.h"
 #include "pcan_frame.h"
 #include "pcan_id.h"
 #include "gui_frame.h"
@@ -88,6 +89,79 @@ size_t pcan_abi_balsam_register_name(uint8_t device, uint16_t address,
     return balsam_can_register_name(device, address, output, output_size);
 }
 
+uint16_t pcan_abi_periph28335_crc16(const uint8_t *data, size_t size)
+{
+    return periph28335_crc16_modbus(data, size);
+}
+
+size_t pcan_abi_periph28335_append_crc(
+    const uint8_t *payload, size_t payload_size,
+    uint8_t *output, size_t output_size)
+{
+    return periph28335_append_crc(payload, payload_size, output, output_size);
+}
+
+size_t pcan_abi_periph28335_build_read(
+    uint8_t controller, uint16_t start, uint16_t count,
+    uint8_t *output, size_t output_size)
+{
+    return periph28335_build_read_registers(
+        controller, start, count, output, output_size);
+}
+
+size_t pcan_abi_periph28335_build_write(
+    uint8_t controller, uint16_t address, uint16_t value,
+    uint8_t *output, size_t output_size)
+{
+    return periph28335_build_write_register(
+        controller, address, value, output, output_size);
+}
+
+size_t pcan_abi_periph28335_build_command(
+    uint8_t controller, uint8_t command_index,
+    uint8_t *output, size_t output_size)
+{
+    return periph28335_build_command(
+        controller, command_index, output, output_size);
+}
+
+size_t pcan_abi_periph28335_expected_read_size(uint16_t count)
+{
+    return periph28335_expected_read_response_size(count);
+}
+
+int pcan_abi_periph28335_decode_read(
+    const uint8_t *data, size_t size, uint8_t controller, uint16_t count,
+    uint16_t *output, size_t output_count)
+{
+    return periph28335_decode_read_response(
+        data, size, controller, count, output, output_count);
+}
+
+int pcan_abi_periph28335_validate_write(
+    const uint8_t *response, size_t response_size,
+    const uint8_t *request, size_t request_size)
+{
+    return periph28335_validate_write_response(
+        response, response_size, request, request_size);
+}
+
+size_t pcan_abi_periph28335_project_count(void)
+{
+    return periph28335_project_count();
+}
+
+const char *pcan_abi_periph28335_project_name(size_t project_index)
+{
+    return periph28335_project_name(project_index);
+}
+
+const char *pcan_abi_periph28335_command_name(
+    size_t project_index, size_t command_index)
+{
+    return periph28335_command_name(project_index, command_index);
+}
+
 size_t pcan_abi_frame_encode(uint8_t sequence, uint8_t flags,
                              uint32_t can_id, const uint8_t *data, uint8_t dlc,
                              uint8_t *output, size_t output_size)
diff --git a/c/set-protocol/src/periph28335.c b/c/set-protocol/src/periph28335.c
new file mode 100644
index 0000000..dee241f
--- /dev/null
+++ b/c/set-protocol/src/periph28335.c
@@ -0,0 +1,171 @@
+#include "periph28335.h"
+
+#include <string.h>
+
+typedef struct {
+    const char *project;
+    const char *commands[PERIPH28335_COMMAND_COUNT];
+} periph28335_project_t;
+
+static const periph28335_project_t projects[] = {
+    { "По умолчанию", { "Test", "Def", "Save", "Load", "Calibr", "Calcul", "Secret", "Light", "Raw", "-", "-", "-", "-", "-", "-", "Reset", "Nothing at all" } },
+    { "23470", { "Test", "Def", "Save", "Load", "Calibr", "Read", "Secret", "-", "-", "-", "-", "-", "-", "-", "-", "Reset", "Nothing at all" } },
+    { "23550", { "Test", "Def", "Save", "Load", "Calibr", "Read", "Secret", "Send", "-", "-", "-", "-", "-", "-", "-", "Reset", "Nothing at all" } },
+    { "23550.2", { "Test", "Def", "Save", "Load", "Calibr", "Calcul", "Secret", "Send", "Raw", "Beep", "", "", "", "", "Log", "Reset", "Nothing at all" } },
+    { "ICE 22220.1-3", { "Test", "Zero", "Save", "Def", "Calibr", "Read", "ExtLamp", "ExtLite", "-", "-", "-", "-", "-", "-", "-", "Reset", "Nothing at all" } },
+    { "ICE 22220.4-5", { "Test", "Def", "Save", "Load", "Raw", "Read", "ExtLamp", "ExtLite", "No log", "-", "-", "-", "-", "-", "-", "Reset", "Nothing at all" } },
+    { "Бальзам 161", { "Test", "Zero", "Save", "Def", "Calibr", "Clbr 400", "Stop", "Start", "Init", "Secret", "-", "-", "-", "-", "-", "Reset", "Nothing at all" } },
+    { "Бальзам 162", { "Test", "Def", "Save", "Load", "Calibr", "Secret", "Stop", "Start", "Init", "Tune", "-", "-", "-", "-", "-", "Reset", "Nothing at all" } },
+    { "Бальзам 163", { "Test", "Def", "Save", "Load", "Calibr", "Calcul", "Stop", "Start", "Init", "Tune", "Secret", "-", "-", "-", "-", "Reset", "Nothing at all" } }
+};
+
+static void put_be16(uint8_t *output, uint16_t value)
+{
+    output[0] = (uint8_t)(value >> 8);
+    output[1] = (uint8_t)value;
+}
+
+static uint16_t get_be16(const uint8_t *input)
+{
+    return (uint16_t)(((uint16_t)input[0] << 8) | input[1]);
+}
+
+uint16_t periph28335_crc16_modbus(const uint8_t *data, size_t size)
+{
+    uint16_t crc = 0xFFFFU;
+    size_t index;
+    uint8_t bit;
+    if ((data == NULL) && (size != 0U)) return 0U;
+    for (index = 0U; index < size; ++index) {
+        crc ^= data[index];
+        for (bit = 0U; bit < 8U; ++bit) {
+            crc = (crc & 1U) != 0U
+                ? (uint16_t)((crc >> 1) ^ 0xA001U)
+                : (uint16_t)(crc >> 1);
+        }
+    }
+    return crc;
+}
+
+size_t periph28335_append_crc(const uint8_t *payload, size_t payload_size,
+                              uint8_t *output, size_t output_size)
+{
+    uint16_t crc;
+    if ((output == NULL) || ((payload == NULL) && (payload_size != 0U)) ||
+        (payload_size > output_size) || (output_size - payload_size < 2U)) {
+        return 0U;
+    }
+    if (payload_size != 0U) memcpy(output, payload, payload_size);
+    crc = periph28335_crc16_modbus(payload, payload_size);
+    output[payload_size] = (uint8_t)crc;
+    output[payload_size + 1U] = (uint8_t)(crc >> 8);
+    return payload_size + 2U;
+}
+
+size_t periph28335_build_read_registers(
+    uint8_t controller, uint16_t start, uint16_t count,
+    uint8_t *output, size_t output_size)
+{
+    uint8_t payload[6];
+    if ((count == 0U) || (count > PERIPH28335_REGISTER_COUNT) ||
+        (start >= PERIPH28335_REGISTER_COUNT) ||
+        ((uint32_t)start + count > PERIPH28335_REGISTER_COUNT)) return 0U;
+    payload[0] = controller;
+    payload[1] = 3U;
+    put_be16(&payload[2], start);
+    put_be16(&payload[4], count);
+    return periph28335_append_crc(payload, sizeof payload, output, output_size);
+}
+
+size_t periph28335_build_write_register(
+    uint8_t controller, uint16_t address, uint16_t value,
+    uint8_t *output, size_t output_size)
+{
+    uint8_t payload[6];
+    if (address >= PERIPH28335_REGISTER_COUNT) return 0U;
+    payload[0] = controller;
+    payload[1] = 6U;
+    put_be16(&payload[2], address);
+    put_be16(&payload[4], value);
+    return periph28335_append_crc(payload, sizeof payload, output, output_size);
+}
+
+size_t periph28335_build_command(
+    uint8_t controller, uint8_t command_index,
+    uint8_t *output, size_t output_size)
+{
+    uint16_t value;
+    if (command_index >= PERIPH28335_COMMAND_COUNT) return 0U;
+    value = command_index < 16U ? (uint16_t)(1UL << command_index) : 0U;
+    return periph28335_build_write_register(
+        controller, PERIPH28335_REGISTER_COUNT - 1U, value,
+        output, output_size);
+}
+
+size_t periph28335_expected_read_response_size(uint16_t count)
+{
+    return (count >= 1U && count <= PERIPH28335_REGISTER_COUNT)
+        ? (size_t)count * 2U + 5U : 0U;
+}
+
+int periph28335_decode_read_response(
+    const uint8_t *data, size_t size, uint8_t controller, uint16_t count,
+    uint16_t *output, size_t output_count)
+{
+    size_t expected = periph28335_expected_read_response_size(count);
+    uint16_t crc;
+    size_t index;
+    if ((data == NULL) || (output == NULL)) return PERIPH28335_ERROR_ARGUMENT;
+    if (expected == 0U) return PERIPH28335_ERROR_RANGE;
+    if (size != expected) return PERIPH28335_ERROR_LENGTH;
+    if (output_count < count) return PERIPH28335_ERROR_CAPACITY;
+    crc = periph28335_crc16_modbus(data, size - 2U);
+    if ((data[size - 2U] != (uint8_t)crc) ||
+        (data[size - 1U] != (uint8_t)(crc >> 8))) {
+        return PERIPH28335_ERROR_CRC;
+    }
+    if ((data[0] != controller) || (data[1] != 3U) ||
+        (data[2] != (uint8_t)(count * 2U))) {
+        return PERIPH28335_ERROR_HEADER;
+    }
+    for (index = 0U; index < count; ++index) {
+        output[index] = get_be16(&data[3U + index * 2U]);
+    }
+    return PERIPH28335_OK;
+}
+
+int periph28335_validate_write_response(
+    const uint8_t *response, size_t response_size,
+    const uint8_t *request, size_t request_size)
+{
+    uint16_t crc;
+    if ((response == NULL) || (request == NULL)) return PERIPH28335_ERROR_ARGUMENT;
+    if ((response_size != PERIPH28335_REQUEST_SIZE) ||
+        (request_size != PERIPH28335_REQUEST_SIZE)) return PERIPH28335_ERROR_LENGTH;
+    crc = periph28335_crc16_modbus(response, response_size - 2U);
+    if ((response[response_size - 2U] != (uint8_t)crc) ||
+        (response[response_size - 1U] != (uint8_t)(crc >> 8))) {
+        return PERIPH28335_ERROR_CRC;
+    }
+    return memcmp(response, request, PERIPH28335_REQUEST_SIZE) == 0
+        ? PERIPH28335_OK : PERIPH28335_ERROR_HEADER;
+}
+
+size_t periph28335_project_count(void)
+{
+    return sizeof projects / sizeof projects[0];
+}
+
+const char *periph28335_project_name(size_t project_index)
+{
+    return project_index < periph28335_project_count()
+        ? projects[project_index].project : NULL;
+}
+
+const char *periph28335_command_name(size_t project_index,
+                                     size_t command_index)
+{
+    return project_index < periph28335_project_count() &&
+           command_index < PERIPH28335_COMMAND_COUNT
+        ? projects[project_index].commands[command_index] : NULL;
+}
diff --git a/c/set-protocol/tests/test_periph28335.c b/c/set-protocol/tests/test_periph28335.c
new file mode 100644
index 0000000..424ba70
--- /dev/null
+++ b/c/set-protocol/tests/test_periph28335.c
@@ -0,0 +1,32 @@
+#include <stdio.h>
+#include <string.h>
+
+#include "periph28335.h"
+
+int main(void)
+{
+    uint8_t request[PERIPH28335_REQUEST_SIZE];
+    static const uint8_t read_prefix[] = { 0x10U, 0x03U, 0x00U, 0x18U, 0x00U, 0x40U };
+    static const uint8_t response_payload[] = { 0x10U, 0x03U, 0x04U, 0x80U, 0x05U, 0x12U, 0x34U };
+    uint8_t response[sizeof response_payload + 2U];
+    uint16_t words[2];
+
+    if (periph28335_build_read_registers(16U, 24U, 64U, request, sizeof request)
+            != sizeof request || memcmp(request, read_prefix, sizeof read_prefix) != 0) return 1;
+    if (periph28335_build_write_register(16U, 7U, 0x1234U, request, sizeof request)
+            != sizeof request || memcmp(request, "\x10\x06\x00\x07\x12\x34", 6U) != 0) return 2;
+    if (periph28335_build_command(16U, 15U, request, sizeof request)
+            != sizeof request || memcmp(request, "\x10\x06\x00\x7F\x80\x00", 6U) != 0) return 3;
+    if (periph28335_append_crc(response_payload, sizeof response_payload,
+            response, sizeof response) != sizeof response) return 4;
+    if (periph28335_decode_read_response(response, sizeof response, 16U, 2U,
+            words, 2U) != PERIPH28335_OK || words[0] != 0x8005U || words[1] != 0x1234U) return 5;
+    response[0] = 17U;
+    if (periph28335_decode_read_response(response, sizeof response, 16U, 2U,
+            words, 2U) != PERIPH28335_ERROR_CRC) return 6;
+    if (periph28335_project_count() != 9U ||
+        strcmp(periph28335_project_name(2U), "23550") != 0 ||
+        strcmp(periph28335_command_name(2U, 7U), "Send") != 0) return 7;
+    puts("PM35/TMS320F28335 protocol tests passed");
+    return 0;
+}
diff --git a/c/set-protocol/tools/build_host.py b/c/set-protocol/tools/build_host.py
index 2f54914..4d6ed08 100644
--- a/c/set-protocol/tools/build_host.py
+++ b/c/set-protocol/tools/build_host.py
@@ -21,7 +21,7 @@ JNI_INCLUDES: list[Path] = []
 SOURCES = [
     ROOT / "src" / name for name in (
         "set_protocol.c", "set_can.c", "set_firmware.c", "set_telemetry.c", "set_plot.c", "set_trends.c", "set_spectrum.c",
-        "balsam_can.c", "gui_catalog.c", "gui_frame.c", "pcan_abi.c", "pcan_crc.c",
+        "balsam_can.c", "periph28335.c", "gui_catalog.c", "gui_frame.c", "pcan_abi.c", "pcan_crc.c",
         "pcan_frame.c", "pcan_id.c", "pcan_link.c", "pcan_ring.c",
         "pcan_gas.c",
     )
@@ -84,7 +84,10 @@ def main() -> int:
         if not (include / "jni.h").is_file():
             parser.error("--java-home must contain include/jni.h")
         JNI_INCLUDES.extend([include, include / {"Windows": "win32", "Darwin": "darwin"}.get(platform.system(), "linux")])
-        SOURCES.append(ROOT / "ports" / "android" / "set_plot_jni.c")
+        SOURCES.extend([
+            ROOT / "ports" / "android" / "set_plot_jni.c",
+            ROOT / "ports" / "android" / "setprotocol_jni.c",
+        ])
     output = args.output.resolve()
     output.parent.mkdir(parents=True, exist_ok=True)
     build_dir = output.parent / ".setprotocol-build"
diff --git a/doc/CROSS_PLATFORM_AUDIT.md b/doc/CROSS_PLATFORM_AUDIT.md
new file mode 100644
index 0000000..871dc1e
--- /dev/null
+++ b/doc/CROSS_PLATFORM_AUDIT.md
@@ -0,0 +1,43 @@
+# Аудит общего кода GUI_Android и SETGUI
+
+Дата проверки: 2026-09-04.
+
+## Уже является общим C-ядром
+
+| Область | Каноническая реализация |
+|---|---|
+| SETProtocol v2, CAN segmentation, firmware flow, telemetry | `c/set-protocol/src/set_*.c` |
+| ProtoCAN ID, кадр, parser, link, CRC-CCITT | `c/set-protocol/src/pcan_*.c` |
+| GUI frame и каталог | `c/set-protocol/src/gui_*.c` |
+| CAN Бальзам | `c/set-protocol/src/balsam_can.c` |
+| График, тренды и спектр | `c/set-protocol/src/set_plot.c`, `set_trends.c`, `set_spectrum.c` |
+| ПМ35 / TMS320F28335: MODBUS-подобные запросы, CRC16/Modbus, ответы и каталог команд | `c/set-protocol/src/periph28335.c` |
+
+Python вызывает это ядро через `python/protocan/native.py`, Android — через
+`ports/android/setprotocol_jni.c`. Файлы на Python и Kotlin являются портами и
+не должны содержать wire-алгоритм.
+
+## Найденное общее, которое ещё нужно перенести
+
+| Приоритет | Android | SETGUI | Что вынести в C |
+|---|---|---|---|
+| 1 | `core/Tms2812Protocol.kt` | `core/tms_flash.py`, `core/tms_terminal.py` | весь RS-протокол ПМ67/2812, CRC, команды и validators |
+| 2 | `core/Ds18b20Protocol.kt` | `core/ds18b20.py` | кодеки списков/данных/EEPROM, CRC8 и значения датчиков |
+| 3 | `core/CanFirmwareProtocol.kt` | `core/can_firmware.py` | автомат CAN boot, статусы, окна блоков |
+| 4 | `core/SlCanProtocol.kt` | `adapters/slcan_adapter.py` и CAN transport | ASCII codec/parser SLCAN; доступ к COM остаётся в портах |
+| 5 | `core/FirmwareImage.kt` | `core/firmware.py` | Intel HEX parser, CRC32/SHA и правила диапазонов |
+
+Это очередь миграции, а не разрешение поддерживать две реализации. При первом
+изменении любой строки из таблицы сначала создаётся соответствующий модуль C и
+общие тестовые векторы.
+
+## Что должно остаться платформенным
+
+- Compose и PySide widgets, навигация и внешний вид;
+- Android USB host, разрешения, foreground lifecycle;
+- Windows COM/MOXA/драйверы и выбор последовательного порта;
+- хранилище настроек, диалоги файлов и уведомления;
+- привязка моделей C к Kotlin/Python и локализованные сообщения UI.
+
+Таким образом, язык GUI можно менять без повторного написания протокола: новый
+клиент реализует только FFI и свой транспортный/UI-порт.
diff --git a/python/protocan/native.py b/python/protocan/native.py
index 23aad9d..b30f40f 100644
--- a/python/protocan/native.py
+++ b/python/protocan/native.py
@@ -139,6 +139,44 @@ class NativeProtocol:
             ctypes.c_uint8, ctypes.c_uint16, ctypes.c_void_p, ctypes.c_size_t,
         ]
         lib.pcan_abi_balsam_register_name.restype = ctypes.c_size_t
+        lib.pcan_abi_periph28335_crc16.argtypes = [ctypes.c_void_p, ctypes.c_size_t]
+        lib.pcan_abi_periph28335_crc16.restype = ctypes.c_uint16
+        lib.pcan_abi_periph28335_append_crc.argtypes = [
+            ctypes.c_void_p, ctypes.c_size_t, ctypes.c_void_p, ctypes.c_size_t,
+        ]
+        lib.pcan_abi_periph28335_append_crc.restype = ctypes.c_size_t
+        lib.pcan_abi_periph28335_build_read.argtypes = [
+            ctypes.c_uint8, ctypes.c_uint16, ctypes.c_uint16,
+            ctypes.c_void_p, ctypes.c_size_t,
+        ]
+        lib.pcan_abi_periph28335_build_read.restype = ctypes.c_size_t
+        lib.pcan_abi_periph28335_build_write.argtypes = [
+            ctypes.c_uint8, ctypes.c_uint16, ctypes.c_uint16,
+            ctypes.c_void_p, ctypes.c_size_t,
+        ]
+        lib.pcan_abi_periph28335_build_write.restype = ctypes.c_size_t
+        lib.pcan_abi_periph28335_build_command.argtypes = [
+            ctypes.c_uint8, ctypes.c_uint8, ctypes.c_void_p, ctypes.c_size_t,
+        ]
+        lib.pcan_abi_periph28335_build_command.restype = ctypes.c_size_t
+        lib.pcan_abi_periph28335_expected_read_size.argtypes = [ctypes.c_uint16]
+        lib.pcan_abi_periph28335_expected_read_size.restype = ctypes.c_size_t
+        lib.pcan_abi_periph28335_decode_read.argtypes = [
+            ctypes.c_void_p, ctypes.c_size_t, ctypes.c_uint8, ctypes.c_uint16,
+            ctypes.POINTER(ctypes.c_uint16), ctypes.c_size_t,
+        ]
+        lib.pcan_abi_periph28335_decode_read.restype = ctypes.c_int
+        lib.pcan_abi_periph28335_validate_write.argtypes = [
+            ctypes.c_void_p, ctypes.c_size_t, ctypes.c_void_p, ctypes.c_size_t,
+        ]
+        lib.pcan_abi_periph28335_validate_write.restype = ctypes.c_int
+        lib.pcan_abi_periph28335_project_count.restype = ctypes.c_size_t
+        lib.pcan_abi_periph28335_project_name.argtypes = [ctypes.c_size_t]
+        lib.pcan_abi_periph28335_project_name.restype = ctypes.c_char_p
+        lib.pcan_abi_periph28335_command_name.argtypes = [
+            ctypes.c_size_t, ctypes.c_size_t,
+        ]
+        lib.pcan_abi_periph28335_command_name.restype = ctypes.c_char_p
         lib.pcan_abi_frame_encode.argtypes = [
             ctypes.c_uint8, ctypes.c_uint8, ctypes.c_uint32,
             ctypes.c_void_p, ctypes.c_uint8, ctypes.c_void_p, ctypes.c_size_t,
@@ -220,6 +258,83 @@ class NativeProtocol:
             device, address, output, len(output))
         return output.value.decode("utf-8")
 
+    @staticmethod
+    def _bytes_buffer(data: bytes):
+        return (ctypes.c_uint8 * len(data)).from_buffer_copy(data) if data else None
+
+    def periph28335_crc16(self, data: bytes) -> int:
+        return int(self.lib.pcan_abi_periph28335_crc16(
+            self._bytes_buffer(data), len(data)))
+
+    def periph28335_append_crc(self, payload: bytes) -> bytes:
+        source = self._bytes_buffer(payload)
+        output = (ctypes.c_uint8 * (len(payload) + 2))()
+        size = int(self.lib.pcan_abi_periph28335_append_crc(
+            source, len(payload), output, len(output)))
+        if size == 0:
+            raise ValueError("SETProtocol rejected PM35 payload")
+        return bytes(output[:size])
+
+    def periph28335_build_read(self, controller: int, start: int,
+                               count: int) -> bytes:
+        output = (ctypes.c_uint8 * 8)()
+        size = int(self.lib.pcan_abi_periph28335_build_read(
+            controller, start, count, output, len(output)))
+        if size == 0:
+            raise ValueError("SETProtocol rejected PM35 read request")
+        return bytes(output[:size])
+
+    def periph28335_build_write(self, controller: int, address: int,
+                                value: int) -> bytes:
+        output = (ctypes.c_uint8 * 8)()
+        size = int(self.lib.pcan_abi_periph28335_build_write(
+            controller, address, value, output, len(output)))
+        if size == 0:
+            raise ValueError("SETProtocol rejected PM35 write request")
+        return bytes(output[:size])
+
+    def periph28335_build_command(self, controller: int,
+                                  command_index: int) -> bytes:
+        output = (ctypes.c_uint8 * 8)()
+        size = int(self.lib.pcan_abi_periph28335_build_command(
+            controller, command_index, output, len(output)))
+        if size == 0:
+            raise ValueError("SETProtocol rejected PM35 command")
+        return bytes(output[:size])
+
+    def periph28335_expected_read_size(self, count: int) -> int:
+        return int(self.lib.pcan_abi_periph28335_expected_read_size(count))
+
+    def periph28335_decode_read(self, data: bytes, controller: int,
+                                count: int) -> tuple[int, tuple[int, ...]]:
+        source = self._bytes_buffer(data)
+        output = (ctypes.c_uint16 * count)()
+        status = int(self.lib.pcan_abi_periph28335_decode_read(
+            source, len(data), controller, count, output, count))
+        return status, tuple(int(value) for value in output) if status == 0 else ()
+
+    def periph28335_validate_write(self, response: bytes,
+                                   request: bytes) -> int:
+        return int(self.lib.pcan_abi_periph28335_validate_write(
+            self._bytes_buffer(response), len(response),
+            self._bytes_buffer(request), len(request)))
+
+    def periph28335_catalog(self) -> dict[str, tuple[str, ...]]:
+        result: dict[str, tuple[str, ...]] = {}
+        for project in range(int(self.lib.pcan_abi_periph28335_project_count())):
+            raw_name = self.lib.pcan_abi_periph28335_project_name(project)
+            if not raw_name:
+                raise NativeProtocolUnavailable("invalid PM35 project catalog")
+            commands = []
+            for command in range(17):
+                raw_command = self.lib.pcan_abi_periph28335_command_name(
+                    project, command)
+                if raw_command is None:
+                    raise NativeProtocolUnavailable("invalid PM35 command catalog")
+                commands.append(raw_command.decode("utf-8"))
+            result[raw_name.decode("utf-8")] = tuple(commands)
+        return result
+
     def encode(self, sequence: int, flags: int, can_id: int, data: bytes) -> bytes:
         if len(data) > 8:
             raise ValueError("DLC cannot exceed 8 bytes")
diff --git a/python/protocan/periph28335.py b/python/protocan/periph28335.py
index 05a6c04..8eb7549 100644
--- a/python/protocan/periph28335.py
+++ b/python/protocan/periph28335.py
@@ -1,66 +1,85 @@
-"""Portable RS command helpers from Set_Terminal_28335.
-
-The byte order and CRC match ``DTrans.pas``/``UNiiefa.pas``.  This module is
-deliberately UI- and serial-port-independent so desktop and Android clients
-can share the same request builders.
-"""
+"""Thin Python port of the shared C99 PM35/TMS320F28335 protocol."""
 
 from __future__ import annotations
 
+from .native import get_native_protocol
+
+
+REGISTER_COUNT = 128
+DEFAULT_CONTROLLER = 16
+DEFAULT_BAUD_RATE = 115_200
+
+
+def _core():
+    return get_native_protocol()
+
 
 def crc16_modbus(data: bytes, crc: int = 0xFFFF) -> int:
-    for byte in data:
-        crc ^= byte
-        for _ in range(8):
-            crc = (crc >> 1) ^ 0xA001 if crc & 1 else crc >> 1
-    return crc & 0xFFFF
+    if crc != 0xFFFF:
+        raise ValueError("Произвольное начальное значение CRC не входит в протокол ПМ35")
+    return _core().periph28335_crc16(bytes(data))
 
 
 def with_crc(payload: bytes) -> bytes:
-    crc = crc16_modbus(payload)
-    return bytes(payload) + crc.to_bytes(2, "little")
+    return _core().periph28335_append_crc(bytes(payload))
 
 
 def build_read_registers(controller: int, start: int, count: int) -> bytes:
     _range("Адрес контроллера", controller, 0xFF)
     _range("Начальный регистр", start, 0xFFFF)
-    if not 1 <= count <= 128 or start + count > 128:
+    if not 1 <= count <= REGISTER_COUNT or start + count > REGISTER_COUNT:
         raise ValueError("Диапазон регистров должен находиться в 0..127")
-    return with_crc(bytes((controller, 3)) + start.to_bytes(2, "big")
-                    + count.to_bytes(2, "big"))
+    return _core().periph28335_build_read(controller, start, count)
 
 
 def build_write_register(controller: int, address: int, value: int) -> bytes:
     _range("Адрес контроллера", controller, 0xFF)
-    _range("Адрес регистра", address, 127)
+    _range("Адрес регистра", address, REGISTER_COUNT - 1)
     _range("Значение", value, 0xFFFF)
-    return with_crc(bytes((controller, 6)) + address.to_bytes(2, "big")
-                    + value.to_bytes(2, "big"))
+    return _core().periph28335_build_write(controller, address, value)
 
 
 def build_command(controller: int, command_index: int) -> bytes:
+    _range("Адрес контроллера", controller, 0xFF)
     if not 0 <= command_index <= 16:
         raise ValueError("Номер команды должен быть в диапазоне 0..16")
-    value = 1 << command_index if command_index < 16 else 0
-    return build_write_register(controller, 127, value)
+    return _core().periph28335_build_command(controller, command_index)
 
 
 def expected_read_response_size(count: int) -> int:
-    return count * 2 + 5
+    if not 1 <= count <= REGISTER_COUNT:
+        raise ValueError("Число регистров должно быть в диапазоне 1..128")
+    size = _core().periph28335_expected_read_size(count)
+    if size == 0:
+        raise ValueError("SETProtocol отклонил размер ответа ПМ35")
+    return size
 
 
-def decode_read_response(data: bytes, count: int) -> tuple[int, ...]:
+def decode_read_response(data: bytes, count: int,
+                         controller: int | None = None) -> tuple[int, ...]:
     expected = expected_read_response_size(count)
     if len(data) != expected:
         raise ValueError(f"Ожидалось {expected} байт, получено {len(data)}")
-    if crc16_modbus(data[:-2]) != int.from_bytes(data[-2:], "little"):
-        raise ValueError("Ошибка CRC ответа")
-    # Historical replies have a three-byte header; registers are big-endian.
-    body = data[3:-2]
-    if len(body) != count * 2:
-        raise ValueError("Неверная длина данных ответа")
-    return tuple(int.from_bytes(body[offset:offset + 2], "big")
-                 for offset in range(0, len(body), 2))
+    expected_controller = data[0] if controller is None and data else controller
+    if expected_controller is None:
+        raise ValueError("Пустой ответ ПМ35")
+    status, values = _core().periph28335_decode_read(
+        bytes(data), expected_controller, count)
+    errors = {
+        -1: "Неверные аргументы ответа",
+        -2: "Диапазон регистров вне 0..127",
+        -3: "Неверная длина данных ответа",
+        -4: "Ошибка CRC ответа",
+        -5: "Неверный заголовок ответа",
+        -6: "Недостаточный буфер ответа",
+    }
+    if status != 0:
+        raise ValueError(errors.get(status, f"Ошибка ответа ПМ35: {status}"))
+    return values
+
+
+def validate_write_response(data: bytes, request: bytes) -> bool:
+    return _core().periph28335_validate_write(bytes(data), bytes(request)) == 0
 
 
 def bits_lsb_first(value: int) -> tuple[bool, ...]:
@@ -85,14 +104,4 @@ def _range(name: str, value: int, maximum: int) -> None:
         raise ValueError(f"{name} вне диапазона 0..{maximum}")
 
 
-PROJECT_COMMANDS = {
-    "По умолчанию": ("Test", "Def", "Save", "Load", "Calibr", "Calcul", "Secret", "Light", "Raw", "-", "-", "-", "-", "-", "-", "Reset", "Nothing at all"),
-    "23470": ("Test", "Def", "Save", "Load", "Calibr", "Read", "Secret", "-", "-", "-", "-", "-", "-", "-", "-", "Reset", "Nothing at all"),
-    "23550": ("Test", "Def", "Save", "Load", "Calibr", "Read", "Secret", "Send", "-", "-", "-", "-", "-", "-", "-", "Reset", "Nothing at all"),
-    "23550.2": ("Test", "Def", "Save", "Load", "Calibr", "Calcul", "Secret", "Send", "Raw", "Beep", "", "", "", "", "Log", "Reset", "Nothing at all"),
-    "ICE 22220.1-3": ("Test", "Zero", "Save", "Def", "Calibr", "Read", "ExtLamp", "ExtLite", "-", "-", "-", "-", "-", "-", "-", "Reset", "Nothing at all"),
-    "ICE 22220.4-5": ("Test", "Def", "Save", "Load", "Raw", "Read", "ExtLamp", "ExtLite", "No log", "-", "-", "-", "-", "-", "-", "Reset", "Nothing at all"),
-    "Бальзам 161": ("Test", "Zero", "Save", "Def", "Calibr", "Clbr 400", "Stop", "Start", "Init", "Secret", "-", "-", "-", "-", "-", "Reset", "Nothing at all"),
-    "Бальзам 162": ("Test", "Def", "Save", "Load", "Calibr", "Secret", "Stop", "Start", "Init", "Tune", "-", "-", "-", "-", "-", "Reset", "Nothing at all"),
-    "Бальзам 163": ("Test", "Def", "Save", "Load", "Calibr", "Calcul", "Stop", "Start", "Init", "Tune", "Secret", "-", "-", "-", "-", "Reset", "Nothing at all"),
-}
+PROJECT_COMMANDS = _core().periph28335_catalog()