Counter/Timer - Addi-Data APCI-1500 Technical Description

APCI-/CPCI-1500
The interrupt source information are available on the user program through an
interrupt routine
See API functions:
An event indicates a change of status (level):
- on an input (ex. "0" 1")
- or on several inputs if a logic has been defined between the inputs.
Running-down: if the counter changes from 1

8.2.4 Counter/timer

On the board three 16-bit counters/timers are available in the component Z8536
(downwards counting). Each counter/timer can be programmed by software.
If the component Z8536 operates as a counter, the corresponding inputs
are used as follows:
Counter
Counter 1:
Counter 2:
Counter 3
Timer
If the component Z8536 is used as a timer, the frequency is used as a reference.
"Gate" and "trigger" are possible through the inputs.
Gate: can be driven by software or an input can be set. The polarity of the input
can be programmed. This "gate" stops counting when it is set.
Trigger : can be driven by software or an input can be set.
The polarity of the input can be programmed. This "trigger" re-loads the
counter/timer with the initial counter value.
The following functionalities are available:
Initialising the counters/timers,
-
Starting the counters/timers,
-
Stopping the counters/timers,
-
Reading the counter value of the counters/timers
-
The counter/timer 3 has a special function: Watchdog Timer.
The function Watchdog Timer allows to supervise the software or PC.
i_APCI1500_SetBoardIntRoutineXX,
i_APCI1500_ResetBoardIntRoutine.
Input 14 signal input.
Input 10 signal input
Input 11 can be used as a "trigger" function
Input 12 can be used as a "gate" function.
Input 15 signal input
Input 16 can be used as a "gate" function.
Functions of the board
0.
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