User manual

UNO-4672 User Manual 26
2.10.7 Interrupt Triggering Edge Control
The interrupt can be triggered by a rising edge or a falling edge of the
interrupt signal, as
determined by the value in the interrupt triggering edge
control
bit in the interrupt control register, as shown in Table 2.15.
2.10.8 Interrupt Flag Bit
The interrupt flag bit is a flag indicating the status of an interrupt. It is a
readable/writable bit. To find the status of the interrupt, you
have to read
the bit
value. To clear the interrupt, you have to write “1” to this bit. This
bit must first be cleared to
service the next coming interrupt.
Table 2.15: Interrupt Triggering Edge Control
DI0TE & DI1TE Triggering edge of interrupt signal
0 Falling edge trigger
1 Rising edge trigger
Table 2.16: Interrupt Flag Bit Values
DI0F & DI1F Interrupt Status
Read 0 No interrupt
1 Interrupt occur
Write 0 Don’t care
1 Clear interrupt
Note: UNO-4672 provides built-in examples to show how to
deliver digital input functionality. Refer to console mode
examples in
C:\Program Files\Advantech\UNO\UNO_IsaDIO\Exam-
ples\Console.
(Please install DI/O driver from the UNO CD to use
these examples)