From ae859485390054962809a58ce868bf3e834193d9 Mon Sep 17 00:00:00 2001
From: Kai Chappell <git@kschappell.com>
Date: Fri, 2 May 2025 23:33:16 +0000
Subject: [PATCH] Add thermal chamber simulator stub

Defines ThermalChamberSim class with stub SCPI command handlers for
TEMP:SETPOINT, TEMP:ACTUAL?, and TEMP:STAB? commands.
---
 src/py_dvt_ate/simulation/virtual/chamber.py | 95 ++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100644 src/py_dvt_ate/simulation/virtual/chamber.py

diff --git a/src/py_dvt_ate/simulation/virtual/chamber.py b/src/py_dvt_ate/simulation/virtual/chamber.py
new file mode 100644
index 0000000..c682f6c
--- /dev/null
+++ b/src/py_dvt_ate/simulation/virtual/chamber.py
@@ -0,0 +1,95 @@
+"""Virtual thermal chamber simulator.
+
+This module implements a SCPI-based virtual thermal chamber that interfaces
+with the physics engine to provide realistic temperature control simulation.
+"""
+
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
+from py_dvt_ate.instruments.scpi import SCPICommand
+from py_dvt_ate.simulation.virtual.base import BaseInstrument
+
+if TYPE_CHECKING:
+    from py_dvt_ate.simulation.physics.engine import PhysicsEngine
+
+
+class ThermalChamberSim(BaseInstrument):
+    """Virtual thermal chamber simulator.
+
+    Simulates a thermal chamber with SCPI control interface. The chamber
+    temperature behaviour is driven by the physics engine.
+
+    SCPI Commands:
+        TEMP:SETPOINT <value>  - Set target temperature in degrees C
+        TEMP:SETPOINT?         - Query current setpoint
+        TEMP:ACTUAL?           - Query actual chamber temperature
+        TEMP:STAB?             - Query temperature stability (1=stable, 0=settling)
+
+    Attributes:
+        manufacturer: "PyDVTATE"
+        model: "TC-SIM-001"
+    """
+
+    manufacturer = "PyDVTATE"
+    model = "TC-SIM-001"
+    serial_number = "TCSIM001"
+    firmware_version = "1.0.0"
+
+    # Stability threshold in degrees C
+    STABILITY_THRESHOLD = 0.5
+
+    def __init__(self, physics_engine: PhysicsEngine | None = None) -> None:
+        """Initialise the thermal chamber simulator.
+
+        Args:
+            physics_engine: Reference to physics engine for temperature state.
+        """
+        self._setpoint = 25.0  # Default setpoint
+        super().__init__(physics_engine)
+
+    def _setup_commands(self) -> None:
+        """Register thermal chamber SCPI commands."""
+        self.register_command("TEMP:SETPOINT", self._handle_temp_setpoint)
+        self.register_command("TEMP:ACTUAL", self._handle_temp_actual)
+        self.register_command("TEMP:STAB", self._handle_temp_stab)
+
+    def reset(self) -> None:
+        """Reset chamber to default state."""
+        self._setpoint = 25.0
+        if self._physics_engine is not None:
+            self._physics_engine.set_chamber_setpoint(self._setpoint)
+
+    def _handle_temp_setpoint(self, command: SCPICommand) -> str:
+        """Handle TEMP:SETPOINT command/query.
+
+        Args:
+            command: Parsed SCPI command.
+
+        Returns:
+            Setpoint value for query, empty string for set command.
+        """
+        raise NotImplementedError("TEMP:SETPOINT not yet implemented")
+
+    def _handle_temp_actual(self, command: SCPICommand) -> str:
+        """Handle TEMP:ACTUAL? query.
+
+        Args:
+            command: Parsed SCPI command.
+
+        Returns:
+            Actual chamber temperature.
+        """
+        raise NotImplementedError("TEMP:ACTUAL? not yet implemented")
+
+    def _handle_temp_stab(self, command: SCPICommand) -> str:
+        """Handle TEMP:STAB? stability query.
+
+        Args:
+            command: Parsed SCPI command.
+
+        Returns:
+            "1" if stable, "0" if settling.
+        """
+        raise NotImplementedError("TEMP:STAB? not yet implemented")