Merge branch 'xspress3_parameters' into 'master'

Added additional parameters to xspress

See merge request controls/python3/pymalcolm!4

malcolm/modules/xspress3/blocks/xspress3_runnable_block.yaml

@@ -15,6 +15,16 @@
     description: Beamline specific label for the detector
     default: Xspress 3
 
+- builtin.parameters.float64:
+    name: frequency_accuracy
+    description: Frequency accuracy for readout deadtime
+    default: 50.0
+
+- builtin.parameters.float64:
+    name: readout_time
+    description: Readout deadtime for detector
+    default: 7e-5
+
 - scanning.controllers.RunnableController:
     mri: $(mri_prefix)
     config_dir: $(config_dir)
@@ -43,7 +53,8 @@
 
 - scanning.parts.ExposureDeadtimePart:
     name: DEADTIME
-    readout_time: 7e-5
+    readout_time: $(readout_time)
+    frequency_accuracy: $(frequency_accuracy)
 
 - ADCore.blocks.stats_plugin_block:
     mri: $(mri_prefix):STAT