Omega Engineering OME-A826PG - Manual (Page 56)

OME-A-826PG Software Manual [Win 95/98/NT]
Next Loop
Using the A826_AD_DMA_RemoveIrq()
to remove IRQ handler.
8237 ADC
Sampling rate define by c1,c2
INT_Handler( )
BufferB
BufferA
system
area
Application
area
Using the A826_AD_DMA_Stop() to
release system DMA buffer.
Using A826_AD_DMA_Start to allocate a
system DMA buffer and programming
sampling rate, desired transfer count then
starting the DMA.
Using A826_AD_DMA_InstallIrq(…) to
install a interrupt handler for IRQ level n and
programming the DMA controller.
To copy datas in bufferA to a user
defined buffer(ex. BufferB) by using
A826_AD_DMA_GetData(..) . Then the
user can analysis these data in BufferB
A buffer(ex. BufferA) in VxD will store
the DMA transferd data. The buffer is in
system area.
No
To test if DMA transfer is finish ?
(Using
A826_AD_DMA_IsNotFinished(..)
Function)
Yes
Date: Aug-15-2000 Ver: 2.2 Page 54