Signatone prober support (#158)

basil/HL/SignatoneProber.py

@@ -0,0 +1,53 @@
+#
+# ------------------------------------------------------------
+# Copyright (c) All rights reserved
+# SiLab, Institute of Physics, University of Bonn
+# ------------------------------------------------------------
+#
+
+from basil.HL.RegisterHardwareLayer import HardwareLayer
+
+
+class SignatoneProber(HardwareLayer):
+
+    '''
+    Implements functions to steer a Signatone probe station such as the one of lal in2p3 in Paris.
+    '''
+
+    def __init__(self, intf, conf):
+        super(SignatoneProber, self).__init__(intf, conf)
+
+    def goto_die(self, index_x, index_y):
+        ''' Move chuck to wafer map chip index'''
+        self._intf.write('MOVECR %d, %d' % (index_x, index_y))
+
+    def goto_next_die(self):
+        ''' Move chuck to next die from wafer map'''
+        self._intf.write('NEXT')
+
+    def goto_first_die(self):
+        ''' Move chuck to first die from wafer map'''
+        self._intf.write('TOFIRSTSITE')
+
+    def get_die(self):
+        ''' Get chip index '''
+        reply = ''
+        for n in range(10):
+            if reply == '0:' or reply == '':
+                reply = self._intf.query('GETCR')
+            else:
+                break
+        values = reply.split(',')
+        return (int(values[0]), int(values[1]))
+
+    def contact(self):
+        ''' Move chuck to contact z position'''
+        self._intf.write('ZCHUCKUP')
+
+    def separate(self):
+        ''' Move chuck to separation z position'''
+        self._intf.write('ZCHUCKDOWN')
+
+    def load(self):
+        ''' Move chuck to load z position'''
+        self._intf.write('LOADWAFER')

basil/TL/Visa.py

@@ -6,8 +6,10 @@
 #
 import pyvisa as visa
 import logging
+import time
 
 from basil.TL.TransferLayer import TransferLayer
+from pyvisa.errors import VisaIOError
 
 logger = logging.getLogger(__name__)
 
@@ -35,6 +37,7 @@ def init(self):
             logger.info('BASIL VISA TL with %s backend found the following devices: %s', backend, ", ".join(rm.list_resources()))
         except NotImplementedError:  # some backends do not always implement the list_resources function
             logger.info('BASIL VISA TL with %s backend', backend)
+
         self._resource = rm.open_resource(**{key: value for key, value in self._init.items() if key not in ("backend",)})
 
     def close(self):
@@ -45,7 +48,27 @@ def write(self, data):
         self._resource.write(data)
 
     def read(self):
-        self._resource.read()
+        if self._resource.read_termination == "":
+            ret = ""
+            while True:
+                try:
+                    ret += self._resource.read_bytes(1).decode(self._resource._encoding)
+                except VisaIOError:
+                    break
+        else:
+            ret = self._resource.read()
+        return ret
 
-    def query(self, data):
-        return self._resource.query(data)
+    def query(self, data, max_tries=10000):
+        if self._resource.read_termination == "":
+            self.write(data)
+            time.sleep(self._resource.query_delay)
+            ret = ""
+            for _ in range(max_tries):
+                try:
+                    ret += self._resource.read_bytes(1).decode(self._resource._encoding)
+                except VisaIOError:
+                    break
+        else:
+            ret = self._resource.query(data)
+        return ret

examples/lab_devices/ProbeStation.py

@@ -5,7 +5,7 @@
 # ------------------------------------------------------------
 #
 
-''' This script shows how to use a Suss Probe station.
+''' This script shows how to use a Suss or Signatone Probe station.
 
 BTW:
 For the PA-200 it is not forseen to be able to communicate with the prober bench software
@@ -25,3 +25,8 @@
 dut.init()
 print(dut['SussProber'].get_position())
 print(dut['SussProber'].get_die())
+
+dut2 = Dut('SignatoneProber.yaml')
+dut2.init()
+print(dut2['SignatoneProber'].get_position())
+print(dut2['SignatoneProber'].get_die())

examples/lab_devices/SignatoneProber.yaml

@@ -0,0 +1,13 @@
+transfer_layer:
+  - name     : Visa
+    type     : Visa
+    init     :
+        resource_name : "TCPIP0::169.254.55.86::9090::SOCKET"
+        backend : "@py"
+        read_termination : ""
+        timeout: 2.0
+
+hw_drivers:
+  - name      : Prober
+    type      : SignatoneProber
+    interface : Visa