Moxa V2616A-C5 [54/111] Examples

V2616A Linux Programming Guide

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Note:

The value of “duration” must be a multiple of 20 milliseconds.

The range of “duration” is 0, or 40 <= duration <= 3600000 milliseconds.

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 need to build the moxalib in advance for DI/DO. The moxalib is included in the folder

\example\moxalib on the 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 limitations, you need to modify MIN_DURATION as 60 for V2616A-LX computers.

Examples

Example files tdio.c and Makefile are located in the folder \example\tdio\ on the CD.

WDT (Watch Dog Timer)

Introduction

The WDT works like a watchdog function, and can be enabled or disabled. When the WDT function is enabled

and the application does not acknowledge it, the system will reboot. The acknowledgement time can be set to

any number between 1 millisecond and 255 seconds.

How the WDT Works

Debian project supports a watchdog daemon. The watchdog daemon checkes if your system is still working. If

programs are no longer executed it will perform the hard reset of the system. The standard watchdog driver

and package have been installed in the V2616A. If you need to run the watchdog once the system boots up,

you can use the insserv to enable the watchdog function.