Code cleanup before release (#114)

shaketune/commands/accelerometer.py

@@ -0,0 +1,60 @@
+#!/usr/bin/env python3
+
+# This file provides a custom and internal Shake&Tune Accelerometer helper that is
+# an interface to Klipper's own accelerometer classes. It is used to start and
+# stop accelerometer measurements and write the data to a file in a blocking manner.
+
+import time
+
+# from ..helpers.console_output import ConsoleOutput
+
+
+class Accelerometer:
+    def __init__(self, klipper_accelerometer):
+        self._k_accelerometer = klipper_accelerometer
+        self._bg_client = None
+
+    @staticmethod
+    def find_axis_accelerometer(printer, axis: str = 'xy'):
+        accel_chip_names = printer.lookup_object('resonance_tester').accel_chip_names
+        for chip_axis, chip_name in accel_chip_names:
+            if axis in ['x', 'y'] and chip_axis == 'xy':
+                return chip_name
+            elif chip_axis == axis:
+                return chip_name
+        return None
+
+    def start_measurement(self):
+        if self._bg_client is None:
+            self._bg_client = self._k_accelerometer.start_internal_client()
+            # ConsoleOutput.print('Accelerometer measurements started')
+        else:
+            raise ValueError('measurements already started!')
+
+    def stop_measurement(self, name: str = None, append_time: bool = True):
+        if self._bg_client is None:
+            raise ValueError('measurements need to be started first!')
+
+        timestamp = time.strftime('%Y%m%d_%H%M%S')
+        if name is None:
+            name = timestamp
+        elif append_time:
+            name += f'_{timestamp}'
+
+        if not name.replace('-', '').replace('_', '').isalnum():
+            raise ValueError('invalid file name!')
+
+        bg_client = self._bg_client
+        self._bg_client = None
+        bg_client.finish_measurements()
+
+        filename = f'/tmp/shaketune-{name}.csv'
+        self._write_to_file(bg_client, filename)
+        # ConsoleOutput.print(f'Accelerometer measurements stopped. Data written to {filename}')
+
+    def _write_to_file(self, bg_client, filename):
+        with open(filename, 'w') as f:
+            f.write('#time,accel_x,accel_y,accel_z\n')
+            samples = bg_client.samples or bg_client.get_samples()
+            for t, accel_x, accel_y, accel_z in samples:
+                f.write('%.6f,%.6f,%.6f,%.6f\n' % (t, accel_x, accel_y, accel_z))