Echelon Mini EVK - Manual (Page 75)

with the eeprom storage class don’t get initialized during reset, but only with a
new application image. The following code fragment illustrates this approach:
eeprom boolean FirstStart = TRUE;
when(reset) {
if (FirstStart) {
// do whatever needs doing in this special case
…
// reset the FirstStart flag:
FirstStart = FALSE;
}
}
Reset Processing
When a device is reset while being configured, the application executes the
when(reset)
task. Code in this task typically takes care of initialization of
special application data as well of attached I/O circuitry. Some of these
initialization tasks can take a long time, and may make the device seem
unresponsive. The reset task should not take longer than five seconds, and
cannot take longer than 18 seconds. If more than a few seconds of processing is
required for the reset task, any time-consuming power-up or reset-processing
must be moved into the first when-task that gets executed after the
when(reset)
task has completed. A simple way to accomplish this is by setting
an application-defined flag, as shown in the following code fragment:
// declare the flag:
boolean ResetFlag = TRUE;
when (reset) {
// perform all immediate initialization here
}
when (ResetFlag) {
// perform all delayed reset processing here
..
// signal completion by changing the flag:
ResetFlag = FALSE;
}
Mini EVK User’s Guide 69