User`s guide

Architecture
AT85C51SND3Bx Firmware User’s Guide 5-29
7691A–MP3–08/07
– a “switch-case” processes all in-coming events
Figure 5-8. internal switch-case processing
This minimal structure to respect is to get a proper control of all new MMI applications by
the MMI manager kernel.
The three basic system events “EVT_START_APPLI”, EVT_APPLI_KILLED”,
EVT_BACK_TO_TOP” and others are defined in “lib_system\mailbox\mail_evt.h”.
5.4.3 Useful Functions
and Macro-functions
A set of functions and macros enabling the MMI applications to interface to the MMI
manager kernel are listed in the two separate tables for requests and status.
 Requests
The request table Table 5-1 gives precisely the running priority of the requests since
they are not executed in the order of their calls. Indeed, the MMI manager kernel trans-
lates all requests into events, treated with more or less delay according as they are
mailed or not.
A non-mailed event is executed immediately by the MMI manager kernel when it takes
control led by MMI applications.
A mailed event is a commonly treated after the scheduler has completed a cycle. It shall
be executed just after the all non-mailed events are treated in order to maintain the
event mailbox half empty before giving back control to the system firmware.