Get device channel attribute value

Functions
int32_t	VkDaqGetChannelAttribute (const char *chan, const char *attrName, char attrValue[], int32_t size)
	Get device channel attribute value.

Detailed Description

Function Documentation

VkDaqGetChannelAttribute()

int32_t VkDaqGetChannelAttribute	(	const char *	chan,
		const char *	attrName,
		char	attrValue[],
		int32_t	size
	)

Get device channel attribute value.

data type	parameter	describe
const char*	chan	Channel name., such as "dev1/AIN1", "dev1/MIN1", "dev1/DIN1", "dev1/AOUT1", etc.
const char*	attrName	Attribute name.
char[]	attrValue[]	Character array, used to store attribute values, multiple values ​​are separated by commas.
int32_t	size	The size of the attrValue arrays.

Returns

On success, return value >= 0.

On failure, returns a negative error number.For detail, please Call VkDaqGetLastErrorInfo

Note

For detailed information about channel properties, please refer to the property reference of the corresponding acquisition card below:

1. VP8388_VP8384_Channel_Attributes

2. VK7016_VK7018_Channel_Attributes

3. VP6068_Channel_Attributes

C language reference

#include <stdio.h>
#include "libvkdaq.h"
 
int main(int argc, char* argv[])
{
    const char* chan = "dev1/AIN1";
    const char* attrName = "InputType";
    char attrValue[4096] = { 0 };
    int32_t size = sizeof(attrValue);
 
    int32_t result = VkDaqGetChannelAttribute(chan, attrName, attrValue, size);  
 
    printf("InputType = %s \n", attrValue);  
 
    if (result >= 0) {
        printf("Successful\n");
    }
    else {
        printf("Failed\n");
    }
 
    return 0;
}