User Manual

Programmer's reference33

5.4.16

HRDLSetDigitalIOChannel (ADC-24 only)

short HRDLSetDigitalIOChannel(

short handle,

short directionOut,

short digitalOutPinState,

short enabledDigitalIn )

Sets up the digital input/output channels. If the direction is 'output' then the pin can

be set high (on) or low (off). While the device is sampling, the direction cannot be

changed but the value of an output can.

Arguments

handle

Handle returned by HRDLOpenUnit.

directionOut

The directions of the digital IO pins, either input or output. The

four least significant bits must be a combination of

HRDL_DIGITAL_IO_CHANNEL constants (see below).

digitalOutPinState

If the pin is set as an output, it can be set high or low by a

combination of HRDL_DIGITAL_IO_CHANNEL constants (see

below).

enabledDigitalIn

Sets the digital input as active. Use a combination of

HRDL_DIGITAL_IO_CHANNEL constants (see below).

Returns

0 if failed,

1 if successful

If the function fails, call HRDLGetUnitInfo with info = HRDL_SETTINGS_ERROR (8) to

obtain the specific setting error.

Pin values for directionOut, digitalOutPinState and enabledDigitalIn

directionOut / enabledDigitalIn

Description

HRDL_DIGITAL_IO_CHANNEL_1 (1)

IO Pin 1

HRDL_DIGITAL_IO_CHANNEL_2 (2)

IO Pin 2

HRDL_DIGITAL_IO_CHANNEL_3 (4)

IO Pin 3

HRDL_DIGITAL_IO_CHANNEL_4 (8)

IO Pin 4