Merge pull request #199 from elechapt/bugfix-USB3Error

Handling the connection with USB2 wire for ps5000D

Author: hmaarrfk

picoscope/picobase.py

@@ -1183,4 +1183,6 @@ def changePowerSource(self, powerstate):
                 powerstate = 0x119
             elif powerstate == "PICO_POWER_SUPPLY_NOT_CONNECTED":
                 powerstate = 0x11A
+            elif powerstate == "PICO_USB3_0_DEVICE_NON_USB3_0_PORT":
+                powerstate = 0x11E
         self._lowLevelChangePowerSource(powerstate)

picoscope/ps5000a.py

@@ -177,7 +177,8 @@ def _lowLevelOpenUnit(self, serialNumber):
         # since the user should address this immediately, and we
         # shouldn't let this go as a soft error
         # but I think this should do for now
-        if m == 0x11A:
+        # PICO_POWER_SUPPLY_NOT_CONNECTED or PICO_USB3_0_DEVICE_NON_USB3_0_PORT
+        if m == 0x11A or m == 0x11E:
             self.changePowerSource(m)
         else:
             self.checkResult(m)