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User starts update client
Display of the Software Update
menu:
Start / Settings / Quit
Query via HTTPS to the web server
IIndication of available software
images
User chooses software image
IImage or message
Download
Image
Check image size, checksum,
Disable interrupts,
clear flash memory, burn image,
Siemens AG
ICM CP
Start
No
Does user want to
continue?
Yes
Message
received?
Download interrupted
battery voltage.
No
Everything ok?
Yes
reboot SIMpad
Update ok
Fig. 9 Sequence of activities for an image update
The download server has the following features:
•
Must recognise the HTTP protocol and Secure Sockets Layer (SSL)
•
Adequate data throughput (download times, several SIMpad updates at once)
•
Must contain CGI script, which correctly administers the requests defined by us
•
Storage space for holding the database and the images
•
Valid certificate for SSL
Continuation of update client after
communication interruption
Client informs server about
downloaded status before
interruption
User inputs data
W eb server requests
more data (e.g.
password or choice
of image)?
No
Display error message
Update failed
Technical Description
Download
rest of image
Yes
Update abandoned
20.08.01, David Brunner
SIMpad SL4
Version V2.0
61/74
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