added tec modulation

laser_control/gui/worker.py

@@ -101,6 +101,22 @@ class ControllerWorker(QObject):
             )
         )
 
+    @pyqtSlot(bool, int, int, int)
+    def apply_tec_modulation(
+        self,
+        enabled: bool,
+        laser: int,
+        frequency_hz: int,
+        amplitude_code: int,
+    ) -> None:
+        """Configure fast TEC drive modulation."""
+        self._run_command(
+            lambda: (
+                self._ensure_connected(),
+                self._apply_tec_modulation_impl(enabled, laser, frequency_hz, amplitude_code),
+            )
+        )
+
     @pyqtSlot(object)
     def save_profile(self, request: object) -> None:
         """Save the current GUI configuration to the device SD card."""
@@ -256,6 +272,26 @@ class ControllerWorker(QObject):
         self.log_message.emit("INFO", f"STM32 DAC set to code {dac_code}")
         self._emit_status()
 
+    def _apply_tec_modulation_impl(
+        self,
+        enabled: bool,
+        laser: int,
+        frequency_hz: int,
+        amplitude_code: int,
+    ) -> None:
+        self._controller.configure_tec_modulation(
+            enabled=enabled,
+            laser=laser,
+            frequency_hz=frequency_hz,
+            amplitude_code=amplitude_code,
+        )
+        state = "enabled" if enabled else "disabled"
+        self.log_message.emit(
+            "INFO",
+            f"TEC modulation {state}: laser={laser}, frequency={frequency_hz} Hz, amplitude={amplitude_code}",
+        )
+        self._emit_status()
+
     def _save_profile_impl(self, request: object) -> None:
         self._controller.save_profile_to_sd(request)
         profile_name = getattr(request, "profile_name", "<unnamed>")