Software Update manager listens for messages from the HMI on this control object
- Publishers
- HMI
- Subscribers
- Update Manager
Attributes
| Attribute |
Data type |
Description |
| cmd |
Number |
Values 1,2,3 specify the Update Manager's behavior:
- 1 = Check for update on the server
- 2 = Initiate update if available (has no effect if update is unavailable)
- 3 = Cancel/ignore this update
|
| data |
String |
Miscellaneous data (depends on the command used) for future use. |
Event behavior
The Update Manager determines whether an update is available (e.g., the user inserts a USB stick with a valid update file)
and then informs the HMI by setting
updateAvailable to
!0 on the
/pps/services/update/status status object. The HMI prompts the user to either install or cancel the update, and then writes the appropriate command to
this control object (
cmd::2 to install,
cmd::3 to cancel).
Note:
For updates via USB, the filename of the update delta file must be of the form QNXCAR2*.mld (case insensitive) on a DOS-formatted USB stick.
If the user wants to see if updates are available on a network server, the HMI will send cmd::1 to this control object to initiate an external check for updates. If an update is found, the Update Manager will set updateAvailable to !0 (along with the other update details) on /pps/services/update/status.