Fixed I-only qubit drive

pulse_lib/qblox/pulsar_uploader.py

@@ -73,21 +73,32 @@ class PulsarUploader:
 
         for name, qubit_ch in self.qubit_channels.items():
             iq_out_channels = qubit_ch.iq_channel.IQ_out_channels
-            i_ch = None
-            q_ch = None
-            for iq_out_ch in iq_out_channels:
-                if iq_out_ch.image == '-':
+            if len(iq_out_channels) == 1:
+                # if there is only 1 channel it must be I
+                i_out_ch = iq_out_channels[0]
+                if i_out_ch.IQ_comp != 'I':
+                    raise ValueError("Single channel drive must be I channel")
+                if i_out_ch.image == '-':
                     raise ValueError("Negative IQ image not supported on Qblox")
-                awg_ch = self.awg_channels[iq_out_ch.awg_channel_name]
-                if iq_out_ch.IQ_comp == 'I':
-                    i_ch = awg_ch
-                elif iq_out_ch.IQ_comp == 'Q':
-                    q_ch = awg_ch
-            out_channels = [i_ch, q_ch]
-            module_name = out_channels[0].awg_name
-            if out_channels[1].awg_name != module_name:
-                raise ValueError("I and Q channel must be on same Qblox module")
-            q1.add_control(name, module_name, [out_ch.channel_number for out_ch in out_channels])
+                awg_ch = self.awg_channels[i_out_ch.awg_channel_name]
+                module_name = awg_ch.awg_name
+                q1.add_control(name, module_name, [awg_ch.channel_number])
+            else:
+                i_ch = None
+                q_ch = None
+                for iq_out_ch in iq_out_channels:
+                    if iq_out_ch.image == '-':
+                        raise ValueError("Negative IQ image not supported on Qblox")
+                    awg_ch = self.awg_channels[iq_out_ch.awg_channel_name]
+                    if iq_out_ch.IQ_comp == 'I':
+                        i_ch = awg_ch
+                    elif iq_out_ch.IQ_comp == 'Q':
+                        q_ch = awg_ch
+                out_channels = [i_ch, q_ch]
+                module_name = out_channels[0].awg_name
+                if out_channels[1].awg_name != module_name:
+                    raise ValueError("I and Q channel must be on same Qblox module")
+                q1.add_control(name, module_name, [out_ch.channel_number for out_ch in out_channels])
 
         for name, dig_ch in self.digitizer_channels.items():
             out_ch = []
@@ -457,6 +468,7 @@ class Job(object):
         pending_resets = set()
         latching_enabled = False
         last_t = 0
+        # TODO @@@ change timestamp to interval for all events.
         for t, channel_name, action in sorted(events):
             feedback_channels.add(channel_name)
             if t != last_t and (len(latching_counters) > 0) != latching_enabled: