National Instruments Welding System 321645c-01 Manual De Usuario

Chapter 2

Function Reference — DIG_Block_Clear

NI-DAQ FRM for PC Compatibles

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 National Instruments Corporation

Halts any ongoing asynchronous transfer, allowing another transfer to be initiated.

group is the group involved in the asynchronous transfer.

Range:

1 or 2 for most devices.
1 through 8 for the DIO-96.

(AT-DIO-32F only) If you aligned the buffer that you used in the previous call to 

DIG_Block_Out

 or 

DIG_Block_In

 by a call to 

Align_DMA_Buffer

, 

DIG_Block_Clear

 

unaligns that buffer before returning. Unaligning a buffer means that the data is shifted so that 
the first data point is located at buffer[0].

After NI-DAQ has started a block transfer, you must call 

DIG_Block_Clear

 before NI-DAQ 

can initiate another block transfer. Notice that 

DIG_Block_Check

 makes this call for you 

when it sees that NI-DAQ has completed a transfer. 

DIG_Block_Clear

 does not change any 

current group assignments, alter the current handshaking settings, or affect the state of the 
pattern generation mode.

i16

assigned by configuration utility

i16

group