Advantech PCI-1736UP Spezifikationen PDF herunterladen (Seite 59)

Comedi

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Return value

If successful, 0 is returned. If there is an error, -1 is returned.

5.4.1.26 comedi_maxdata_is_chan_speciﬁc

comedi_maxdata_is_chan_speciﬁc — maximum sample depends on channel

Synopsis

#include <comedilib.h>

int comedi_maxdata_is_chan_speciﬁc(comedi_t * device, unsigned int subdevice);

Description

If each channel of the speciﬁed subdevice may have different maximum sample values, this function returns 1. Otherwise, this

function returns 0. On error, this function returns -1.

5.4.1.27 comedi_open

comedi_open — open a Comedi device

Synopsis

#include <comedilib.h>

comedi_t * comedi_open(const char * ﬁlename);

Description

Open a Comedi device speciﬁed by the ﬁle ﬁlename.

Return value

If successful, comedi_open() returns a pointer to a valid comedi_t structure. This structure is opaque; the pointer should not

be dereferenced by the application. NULL is returned on failure.

5.4.1.28 comedi_range_is_chan_speciﬁc

comedi_range_is_chan_speciﬁc — range information depends on channel

Synopsis

#include <comedilib.h>

int comedi_range_is_chan_speciﬁc(comedi_t * device, unsigned int subdevice);

Description

If each channel of the speciﬁed subdevice may have different range information, this function returns 1. Otherwise, this function

returns 0. On error, this function returns -1.

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Advantech PCI-1736UP Spezifikationen Seite 59