Merge pull request #1 from wlgrd/discovery

adds method to discover ppk2

Author: NejcKle

example.py

@@ -9,7 +9,15 @@
 import time
 from src.ppk2_api import PPK2_API
 
-ppk2_test = PPK2_API("/dev/ttyACM0")
+ppk2s_connected = PPK2_API.list_devices()
+if(len(ppk2s_connected) == 1):
+    ppk2_port = ppk2s_connected[0]
+    print(f'Found PPK2 at {ppk2_port}')
+else:
+    print(f'Too many connected PPK2\'s: {ppk2s_connected}')
+    exit()
+
+ppk2_test = PPK2_API(ppk2_port)
 ppk2_test.get_modifiers()
 ppk2_test.use_ampere_meter()  # set ampere meter mode
 ppk2_test.toggle_DUT_power("OFF")  # disable DUT power

src/ppk2_api.py

@@ -171,6 +171,13 @@ def _handle_raw_data(self, adc_value):
 
         return analog_value
 
+    @staticmethod
+    def list_devices():
+        import serial.tools.list_ports
+        ports = serial.tools.list_ports.comports()
+        devices = [port.device for port in ports if port.product == 'PPK2']
+        return devices
+
     def get_data(self):
         """Return readings of one sampling period"""
         sampling_data = self.ser.read(self.ser.in_waiting)