Moxa V2401-CE [69/108] Dio program source code file example

V2401/2402 Series Linux User’s Manual Programmer Guide

4-6

The error of the measurement is 24 ms. For example, if the DIN duration is 200

ms, this event will be generated when the DIN pin stays in the same state for a

time between 176 ms and 200 ms.

Output None

Return Refer to the error code

Function

int get_din_event(int diport, int *mode, long int *duration)

Description To retrieve the DIN event configuration, including mode

(DIN_EVENT_HIGH_TO_LOW or DIN_EVENT_LOW_TO_HIGH), and the

value of “duration.”

Input

<diport> Which DIN port you want to retrieve

<mode> Save the set event.

<duration> The duration the DIN port is kept in high or low state. - return to the

current duration value of diport

Output <mode>

DIN_EVENT_HIGH_TO_LOW (1): From high to low

DIN_EVENT_LOW_TO_HIGH(0): From low to high

DIN_EVENT_CLEAR(-1): Clear this event

The value of duration should be 0 or 40 <= duration <= 3600000 milliseconds.

Return Refer to the error code

Special Note

1. You have to build the moxalib in advance for DI/DO. The moxalib is included in the folder

\example\moxalib in CD.

2. Make sure to link the library libmoxalib for DI/DO programming, and include the header file

moxadevice.h. Only one program at a time can use the DI/DO library.

3. Due to hardware limitation, you need to modify MIN_DURATION as 60 for V2401/2402.

Examples

DIO Program Source Code File Example

File Name: tdio.c

Description: This program connects DO1 to DI1, changes the digital output state to high or low by

manual input, then detects and counts the state changed events from DI1.

#include <stdio.h>

#include <stdlib.h>

#ifdef NO_MOXADEVICE_HEADER

#include "moxadevice.h"

#else

#include <moxadevice.h>

#endif