Meilhaus Electronic ME-5004, Руководство пользователя

Страница: 27 / 39

b31…16.
Example (see diagram 13):
By writing the value 00800004 Hex as a mask value (see parame-
ter
<iIrqArg>
of the function bit 2 is monitored for
a falling edge, and bit 7 for a rising edge. A rising edge now is to
arrive at bit 7, so that an interrupt is issued and in the interrupt
status value bit b23 returns “1”. Any edges that might arrive at
pins labelled with an “X” are ignored. Only the change in state of a
pin whose edge is set to “1” in the parameter
<iIrqArg>
can is-
sue an interrupt.
The interrupt event is evaluated with the function
We recommend using what is known as the “extended format” to
obtain detailed information about the triggering edge.