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Hardware/Projects/TempDataLogger/TempLogHostApp_Python/temp_log_config.py 2.87 KB
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  """
               LUFA Library
       Copyright (C) Dean Camera, 2017.
  
    dean [at] fourwalledcubicle [dot] com
             www.lufa-lib.org
  """
  
  """
      Front-end configuration app for the TempDataLogger project. This script
      configures the logger to the current system time and date, with a user
      defined logging interval.
  
      The logging interval should be specified in milliseconds and is rounded to
      a multiple of 500ms.
  
      Usage:
          python temp_log_config.py <Log_Interval>
  
      Example:
          python temp_log_config.py 500
  
      Requires the pywinusb library (https://pypi.python.org/pypi/pywinusb/).
  """
  
  import sys
  from datetime import datetime
  import pywinusb.hid as hid
  
  # Generic HID device VID, PID and report payload length (length is increased
  # by one to account for the Report ID byte that must be pre-pended)
  device_vid = 0x03EB
  device_pid = 0x2063
  report_length = 1 + 7
  
  
  def get_hid_device_handle():
      hid_device_filter = hid.HidDeviceFilter(vendor_id=device_vid,
                                              product_id=device_pid)
  
      valid_hid_devices = hid_device_filter.get_devices()
  
      if len(valid_hid_devices) is 0:
          return None
      else:
          return valid_hid_devices[0]
  
  
  def configure_temp_log_device(device, time_date, log_interval_500ms):
      # Report data for the demo is the report ID (always zero)
      report_data = [0]
  
      # Followed by the time/date data
      report_data.extend([time_date.hour, time_date.minute,
                          time_date.second, time_date.day,
                          time_date.month, time_date.year - 2000])
  
      # Lastly the log interval in 500ms units of time
      report_data.extend([log_interval_500ms])
  
      # Zero-extend the array to the length the report should be
      report_data.extend([0] * (report_length - len(report_data)))
  
      # Send the generated report to the device
      device.send_output_report(report_data)
  
  
  def main(time_date, log_interval_500ms):
      hid_device = get_hid_device_handle()
  
      if hid_device is None:
          print("No valid HID device found.")
          sys.exit(1)
  
      try:
          hid_device.open()
  
          print("Connected to device 0x%04X/0x%04X - %s [%s]" %
                (hid_device.vendor_id, hid_device.product_id,
                 hid_device.product_name, hid_device.vendor_name))
  
          configure_temp_log_device(hid_device, time_date, log_interval_500ms)
  
          print("Time/Date is now set to %s" % time_date)
          print("Log interval is now set to every %0.1fs" % (log_interval_500ms * (500.0 / 1000.0)))
  
      finally:
          hid_device.close()
  
  
  if __name__ == '__main__':
      time_date = datetime.now()
      log_interval_500ms = (int(sys.argv[1]) / 500) if len(sys.argv) > 1 else 2
  
      # Clamp the log interval to the allowable range
      log_interval_500ms = max(log_interval_500ms, 0x01)
      log_interval_500ms = min(log_interval_500ms, 0xFF)
  
      main(time_date, log_interval_500ms)