Add @Volatile, @ReadOnly support

APMrover2/Parameters.cpp

@@ -13,6 +13,12 @@
 
 const AP_Param::Info Rover::var_info[] = {
 	GSCALAR(format_version,         "FORMAT_VERSION",   1),
+    
+    // @Param: SYSID_SW_TYPE
+    // @DisplayName: Software Type
+    // @Description: This is used by the ground station to recognise the software type (eg ArduPlane vs ArduCopter)
+    // @User: Advanced
+    // @ReadOnly: True
 	GSCALAR(software_type,          "SYSID_SW_TYPE",    Parameters::k_software_type),
 
 	// misc

AntennaTracker/Parameters.cpp

@@ -25,6 +25,7 @@ const AP_Param::Info Tracker::var_info[] = {
     // @Description: This is used by the ground station to recognise the software type (eg ArduPlane vs ArduCopter)
     // @Values: 0:ArduPlane,4:AntennaTracker,10:Copter,20:Rover
     // @User: Advanced
+    // @ReadOnly: True
     GSCALAR(software_type,          "SYSID_SW_TYPE",  Parameters::k_software_type),
 
     // @Param: SYSID_THISMAV

ArduCopter/Parameters.cpp

@@ -33,6 +33,7 @@ const AP_Param::Info Copter::var_info[] = {
     // @DisplayName: Eeprom format version number
     // @Description: This value is incremented when changes are made to the eeprom format
     // @User: Advanced
+    // @ReadOnly: True
     GSCALAR(format_version, "SYSID_SW_MREV",   0),
 
     // @Param: SYSID_SW_TYPE
@@ -40,6 +41,7 @@ const AP_Param::Info Copter::var_info[] = {
     // @Description: This is used by the ground station to recognise the software type (eg ArduPlane vs ArduCopter)
     // @Values: 0:ArduPlane,4:AntennaTracker,10:Copter,20:Rover
     // @User: Advanced
+    // @ReadOnly: True
     GSCALAR(software_type,  "SYSID_SW_TYPE",   Parameters::k_software_type),
 
     // @Param: SYSID_THISMAV

ArduPlane/Parameters.cpp

@@ -24,6 +24,7 @@ const AP_Param::Info Plane::var_info[] = {
     // @DisplayName: Software Type
     // @Description: This is used by the ground station to recognise the software type (eg ArduPlane vs ArduCopter)
     // @User: Advanced
+    // @ReadOnly: True
     GSCALAR(software_type,          "SYSID_SW_TYPE",  Parameters::k_software_type),
 
     // @Param: SYSID_THISMAV

Tools/autotest/param_metadata/param.py

@@ -24,7 +24,9 @@ known_param_fields = [
              'Increment',
              'User',
              'RebootRequired',
-             'Bitmask'
+             'Bitmask',
+             'Volatile',
+             'ReadOnly'
                       ]
 
 required_param_fields = [

libraries/AP_Baro/AP_Baro.cpp

@@ -45,6 +45,8 @@ const AP_Param::GroupInfo AP_Baro::var_info[] = {
     // @Description: calibrated ground pressure in Pascals
     // @Units: pascals
     // @Increment: 1
+    // @ReadOnly: True
+    // @Volatile: True
     AP_GROUPINFO("ABS_PRESS", 2, AP_Baro, sensors[0].ground_pressure, 0),
 
     // @Param: TEMP
@@ -52,6 +54,8 @@ const AP_Param::GroupInfo AP_Baro::var_info[] = {
     // @Description: calibrated ground temperature in degrees Celsius
     // @Units: degrees celsius
     // @Increment: 1
+    // @ReadOnly: True
+    // @Volatile: True
     AP_GROUPINFO("TEMP", 3, AP_Baro, sensors[0].ground_temperature, 0),
 
     // index 4 reserved for old AP_Int8 version in legacy FRAM