Table of Contents
Advertisement
Monitoring Data Transfer
Transfer
Direction
Input
ND_READ_MARK_H_SNAPSHOT_GR1
ND_READ_MARK_H_SNAPSHOT_GR1
ND_READ_MARK_L_SNAPSHOT_GR1
ND_READ_MARK_L_SNAPSHOT_GR2
Output
ND_WRITE_MARK_H_SNAPSHOT_GR1
ND_WRITE_MARK_H_SNAPSHOT_GR2
ND_WRITE_MARK_L_SNAPSHOT_GR1
ND_WRITE_MARK_L_SNAPSHOT_GR2
You should always read the least significant bits of the transfer count before reading
Note
the most significant bits. The 32 most significant bits of the transfer count is cached in
software when you read the least significant bits.
Connecting Signals
© National Instruments Corporation
To monitor your data transfer once data transfer starts:
•
NI-DAQ C interface—Call
transfer. For continuous transfers, use
obtain the cumulative transfer count (
return the number of buffer iterations completed). The following table
lists the attribute types and values returned for
Get_DAQ_Device_Info
Attribute
•
LabVIEW—Use the Digital Buffer Write VI or the Digital Buffer
Read VI, which are called by the DIO Read VI, the DIO Write VI, and
the DIO Wait VI.
Connect digital input signals to the I/O connector using the pinout
diagrams, Figures C-1,
68-to-50-Pin Adapter Pin
If you are using an external source for your REQ signal, connect it to the
appropriate REQ pin of the I/O connector.
DIG_Block_Check
Get_DAQ_Device_Info
DIG_Block_Check
:
Most significant 32-bit of transfer count
Least significant 32-bit of transfer count
Most significant 32-bit of transfer count
Least significant 32-bit of transfer count
653X I/O Connector 68-Pin
Assignments.
2-23
Chapter 2
Using Your 653X
to monitor finite data
does not
Value Returned
Assignments, or C-2,
653X User Manual
to
Advertisement
Table of Contents
