Implemented a feature which allows for an additional field for having a text message

with a motor axis. To this purpose a new derived class SINQAxis and SINQController were
added which other drivers using this feature can derive from. The proof of concept and
test platform is the EL734 driver.

sinqEPICSApp/src/SINQAxis.cpp

@@ -0,0 +1,36 @@
+/*
+  This is a version of the motor axis record which adds code for having an
+  text field with an error message to go with the motor. The code is
+  courtesey Torsten Boergershausen from ESS and from the axisRecord.
+
+  Mark Koennecke, March 2017
+*/
+#include "SINQAxis.h"
+#include "SINQController.h"
+
+SINQAxis::SINQAxis(class SINQController *pC, int axis)
+  : asynMotorAxis((asynMotorController *)pC, axis),
+    pC_(pC)
+{
+}
+
+
+void SINQAxis::updateMsgTxtFromDriver(const char *value)
+{
+  if (value && value[0]) {
+    pC_->setIntegerParam(axisNo_,pC_->motorMessageIsFromDriver_, 1);
+    setStringParam(pC_->motorMessageText_,value);
+  } else {
+    pC_->setIntegerParam(axisNo_,pC_->motorMessageIsFromDriver_, 0);
+  }  
+}
+
+/**
+ * Sets the value for a string for this axis in the parameter library.
+ * \param[in] function The function (parameter) number
+ * \param[in] value Value to set */
+asynStatus SINQAxis::setStringParam(int function, const char *value)
+{
+  // Call the base class method
+  return pC_->setStringParam(axisNo_, function, value);
+}