flake: Add pytec runnables to devShell

Makes it possible to directly run `plot` and `autotune` in the devShell.

flake.nix

@@ -2,14 +2,22 @@
   description = "Firmware for the Sinara 8451 Thermostat";
 
   inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.05";
-  inputs.rust-overlay = { 
+  inputs.rust-overlay = {
     url = "github:oxalica/rust-overlay";
     inputs.nixpkgs.follows = "nixpkgs";
   };
 
-  outputs = { self, nixpkgs, rust-overlay }:
+  outputs =
+    {
+      self,
+      nixpkgs,
+      rust-overlay,
+    }:
     let
-      pkgs = import nixpkgs { system = "x86_64-linux"; overlays = [ (import rust-overlay) ]; };
+      pkgs = import nixpkgs {
+        system = "x86_64-linux";
+        overlays = [ (import rust-overlay) ];
+      };
 
       rust = pkgs.rust-bin.stable."1.66.0".default.override {
         extensions = [ "rust-src" ];
@@ -25,7 +33,7 @@
         version = "0.0.0";
 
         src = self;
-        cargoLock = { 
+        cargoLock = {
           lockFile = ./Cargo.lock;
           outputHashes = {
             "stm32-eth-0.2.0" = "sha256-48RpZgagUqgVeKm7GXdk3Oo0v19ScF9Uby0nTFlve2o=";
@@ -49,9 +57,34 @@
         dontFixup = true;
         auditable = false;
       };
-    in {
+
+      pytec = pkgs.python3Packages.buildPythonPackage {
+        pname = "pytec";
+        version = "0.0.0";
+        src = "${self}/pytec";
+
+        propagatedBuildInputs = with pkgs.python3Packages; [
+          numpy
+          matplotlib
+        ];
+      };
+
+      pytec-dev-wrappers = pkgs.runCommandNoCC "pytec-dev-wrappers" { } ''
+        mkdir -p $out/bin
+        for program in ${self}/pytec/*.py; do
+          if [ -x $program ]; then
+            progname=`basename -s .py $program`
+            outname=$out/bin/$progname
+            echo "#!${pkgs.bash}/bin/bash" >> $outname
+            echo "exec python3 -m $progname \"\$@\"" >> $outname
+            chmod 755 $outname
+          fi
+        done
+      '';
+    in
+    {
       packages.x86_64-linux = {
-        inherit thermostat;
+        inherit thermostat pytec;
         default = thermostat;
       };
 
@@ -61,12 +94,25 @@
 
       devShells.x86_64-linux.default = pkgs.mkShellNoCC {
         name = "thermostat-dev-shell";
-        packages = with pkgs; [
-          rust llvm
-          openocd dfu-util rlwrap
-          ] ++ (with python3Packages; [
-            numpy matplotlib
+        packages =
+          with pkgs;
+          [
+            rust
+            llvm
+            openocd
+            dfu-util
+            rlwrap
+            pytec-dev-wrappers
+          ]
+          ++ (with python3Packages; [
+            numpy
+            matplotlib
           ]);
+        shellHook = ''
+          export PYTHONPATH=`git rev-parse --show-toplevel`/pytec:$PYTHONPATH
+        '';
       };
+
+      formatter.x86_64-linux = nixpkgs.legacyPackages.x86_64-linux.nixfmt-rfc-style;
     };
-}
+}

pytec/example.py

@@ -1,3 +1,4 @@
+import time
 from pytec.client import Client
 
 tec = Client() #(host="localhost", port=6667)
@@ -7,5 +8,6 @@ print(tec.get_pid())
 print(tec.get_output())
 print(tec.get_postfilter())
 print(tec.get_b_parameter())
-for data in tec.report_mode():
-    print(data)
+while True:
+    print(tec.get_report())
+    time.sleep(0.05)

pytec/pytec/client.py

@@ -1,7 +1,7 @@
 import socket
 import json
 import logging
-import time
+
 
 class CommandError(Exception):
     pass
@@ -12,6 +12,10 @@ class Client:
         self._lines = [""]
         self._check_zero_limits()
 
+    def disconnect(self):
+        self._socket.shutdown(socket.SHUT_RDWR)
+        self._socket.close()
+
     def _check_zero_limits(self):
         output_report = self.get_output()
         for output_channel in output_report:
@@ -110,18 +114,18 @@ class Client:
         """
         return self._get_conf("postfilter")
 
-    def report_mode(self):
-        """Start reporting measurement values
+    def get_report(self):
+        """Obtain one-time report on measurement values
 
         Example of yielded data::
             {'channel': 0,
              'time': 2302524,
+             'interval': 0.12
              'adc': 0.6199188965423515,
              'sens': 6138.519310282602,
              'temperature': 36.87032392655527,
              'pid_engaged': True,
              'i_set': 2.0635816680889123,
-             'vref': 1.494,
              'dac_value': 2.527790834044456,
              'dac_feedback': 2.523,
              'i_tec': 2.331,
@@ -129,16 +133,19 @@ class Client:
              'tec_u_meas': 2.5340000000000003,
              'pid_output': 2.067581958092247}
         """
-        while True:
-            self._socket.sendall("report\n".encode('utf-8'))
-            line = self._read_line()
-            if not line:
-                break
-            try:
-                yield json.loads(line)
-            except json.decoder.JSONDecodeError:
-                pass
-            time.sleep(0.05)
+        return self._get_conf("report")
+
+    def get_ipv4(self):
+        """Get the IPv4 settings of the Thermostat"""
+        return self._command("ipv4")
+
+    def get_fan(self):
+        """Get Thermostat current fan settings"""
+        return self._command("fan")
+
+    def get_hwrev(self):
+        """Get Thermostat hardware revision"""
+        return self._command("hwrev")
 
     def set_param(self, topic, channel, field="", value=""):
         """Set configuration parameters
@@ -163,10 +170,38 @@ class Client:
         self.set_param("pid", channel, "target", value=target)
         self.set_param("output", channel, "pid")
 
-    def save_config(self):
+    def save_config(self, channel=""):
         """Save current configuration to EEPROM"""
-        self._command("save")
+        self._command("save", channel)
+        if channel != "":
+            self._read_line()  # read the extra {}
 
-    def load_config(self):
+    def load_config(self, channel=""):
         """Load current configuration from EEPROM"""
-        self._command("load")
+        self._command("load", channel)
+        if channel != "":
+            self._read_line()  # read the extra {}
+
+    def reset(self):
+        """Reset the device"""
+        self._socket.sendall("reset".encode("utf-8"))
+        self.disconnect()  # resetting ends the TCP session, disconnect anyway
+
+    def enter_dfu_mode(self):
+        """Reset device and enters USB device firmware update (DFU) mode"""
+        self._socket.sendall("dfu".encode("utf-8"))
+        self.disconnect()  # resetting ends the TCP session, disconnect anyway
+
+    def set_ipv4(self, address, netmask, gateway=""):
+        """Configure IPv4 address, netmask length, and optional default gateway"""
+        self._command("ipv4", f"{address}/{netmask}", gateway)
+
+    def set_fan(self, power=None):
+        """Set fan power with values from 1 to 100. If omitted, set according to fcurve"""
+        if power is None:
+            power = "auto"
+        self._command("fan", power)
+
+    def set_fcurve(self, a=1.0, b=0.0, c=0.0):
+        """Set fan controller curve coefficients"""
+        self._command("fcurve", a, b, c)