Справочник Пользователя для National Instruments Welding System 321645c-01

Chapter 2

Function Reference — SCAN_Demux

NI-DAQ FRM for PC Compatibles

2-294

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 National Instruments Corporation

Rearranges, or demultiplexes, data acquired by a 

SCAN

 operation into row-major order 

(that is, each row of the array holding the data corresponds to a scanned channel) for easier 
access by C applications. 

SCAN_Demux

 does not need to be called by BASIC applications to 

rearrange two-dimensional arrays because these arrays are accessed in column-major order.

buffer is an integer array of A/D conversion samples returned by a 

SCAN

 operation.

count is the integer length of buffer (that is, the number of samples contained in buffer).

numChans is the number of channels that NI-DAQ scanned when the data was created. If you 
used SCXI to acquire the data, numChans should be the total number of channels sampled 
during one scan. Otherwise, this parameter is the same as the value of numChans selected in 

SCAN_Setup

, 

Lab_ISCAN_Start

, 

SCAN_Op

, or 

Lab_ISCAN_Op

.

Range:

1 through 16.
1 through 512 for the E Series devices, AT-MIO-16F-5, AT-MIO-64F-5, and 
AT-MIO-16X.
1 through the physical number of AI channels for PCI-6110E and PCI-6111E 
(4 or 2).

u32

number of samples

i16

number of channels that were scanned

i16

number of AMUX-64T devices used

[i16]

conversion samples returned