Table of Contents
Advertisement
1.
Read the new status of the interrupt signal source
2.
Compare the new status with the old status to identify the active signals
3.
If P2C0 is active, service P2C0 and non-inverter/inverted as the P2C0
signal
4.
If P2C1 is active, service P2C1 and non-inverted/inverted as the P2C1
signal
5.
If P2C2 is active, service P2C2 and non-inverted/inverted as the P2C2
signal
6.
If P2C3 is active, service P2C3 and non-inverted/inverted the P2C3
signal
7.
Save the new status to old status
Limitation: if the interrupt signal is too short, the new status may be the same as
the old status. In this case, the interrupt signal must be held at active until the
interrupt service routine is executed. This hold time is different for different OS
versions and can be as short as micro-second or as a long as second. In
general, 20 ms is enough for all types of OS.
PIO/PEX-D24/D56 Series User Manual (Ver.3.1, Mar. 2015, PMH-005-31)
18
Advertisement
Table of Contents
