Moxa V2616A-C8-CT-W7E [53/111] Define dio_error_port 1 no such port define dio_error_mode 2 no such mode or state define dio_error_control 3 open or ioctl fail define dio_error_duration 4 the value of duration is not 0 or not in the range 40 duration 3600000 milliseconds 1 hour define dio_error_duration_20ms 5 the value of duration must be a multiple of 20 ms define dio_ok 0
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Moxa V2616A-C8-CT-W7E [53/111] Define dio_error_port 1 no such port define dio_error_mode 2 no such mode or state define dio_error_control 3 open or ioctl fail define dio_error_duration 4 the value of duration is not 0 or not in the range 40 duration 3600000 milliseconds 1 hour define dio_error_duration_20ms 5 the value of duration must be a multiple of 20 ms define dio_ok 0

Moxa V2616A-C8-W7E [53/111] Define dio_error_port 1 no such port define dio_error_mode 2 no such mode or state define dio_error_control 3 open or ioctl fail define dio_error_duration 4 the value of duration is not 0 or not in the range 40 duration 3600000 milliseconds 1 hour define dio_error_duration_20ms 5 the value of duration must be a multiple of 20 ms define dio_ok 0
V2616A Linux Programming Guide
4-4
Return error code definitions:
#define DIO_ERROR_PORT -1 // no such port
#define DIO_ERROR_MODE -2 // no such mode or state
#define DIO_ERROR_CONTROL -3 // open or ioctl fail
#define DIO_ERROR_DURATION -
4 // The value of duration is not 0 or not in the range,
40 <= duration <= 3600000 milliseconds (1 hour)
#define DIO_ERROR_DURATION_20MS -5 // The value of duration must
be a multiple of 20
ms
#define DIO_OK 0
DIN and DOUT definitions:
#define DIO_HIGH 1
#define DIO_LOW 0
Moxa functions for DI/DO
Function int set_dout_state(int doport, int state)
Description Set the DOUT port to high or low state.
Input <doport> The DOUT port you want to set. Port starts from 0 to 3
<state> Set high or low state; DIO_HIGH (1) for high, DIO_LOW (0) for low.
Output None
Return refer to the error code
Function int get_din_state(int diport, int *state)
Description Get the DIN port state
Input <diport> The DIN port to get the state of. Port numbering is from 0 to 3
<state> Save the current state
Output <state> DIO_HIGH (1) for high, DIO_LOW (0) for low
Return Refer to the error code
Function int get_dout_state(int doport, int *state)
Description Get the DOUT port state
Input <doport> The DOUT port to get the state of.
<state> Save the current state.
Output <state> DIO_HIGH (1) for high, DIO_LOW (0) for low
Return Refer to the error code
Function int set_din_event(int diport, void (*func)(int diport), int mode, long int duration)
Description Set the DIN event when the state is changed from high to low or from low to high
Input <diport> The port that will be used to detect the DIN event.
Port numbering is from 0 to 3. This value depends on your device.
<(*func) (int diport)>
Not NULL: Returns the call back function. When the event occurs, the call back function will
be invoked.
NULL: Clear this event
<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
<duration>
0: Detect the din event DIN_EVENT_HIGH_TO_LOW or DIN_EVENT_LOW_TO_HIGH
without duration
Not 0: Detect the din event DIN_EVENT_HIGH_TO_LOW or
DIN_EVENT_LOW_TO_HIGH with duration.

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