Chapter 4 Programming
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National Instruments Corporation 4-19 PCI E Series RLPM
AI_Mode_2_Register
AI SI2 initial load source = 1;
Joint_Reset_Register
AI configuration start = 0;
AI configuration end = 1;
8. Perform Analog Input Example 1 Step 4.
9. AI_Arming to arm the analog input counter
AI_Command_1_Register
AI SC arm = 1;
AI SI arm = 1;
AI SI2 arm = 1;
AI DIV arm = 1;
10. Construct the buffer information linked list. Each node contains the
information about one buffer: Every node stores each buffer's physical
address and logical address, and total transfer bytes for that buffer.
11. Set up the DRQ channel
AI_AO_Select_Register
DMA Channel A enable=1;
12. Call the function
MITE_DMAProgram
to set up the MITE for DMA
transfer
You need to pass the following parameters to the function:
BufferinfoNodeHeadPtr: Point to the buffer information linked list
head node.
NumberOfBuffer: Number of buffers you use for DMA
transfers
dmaChannel: DMA channel you want to use, there are
four DMA channels on each PCI board
(0 to 3).
direction: Your DMA transfer direction (INPUT or
OUTPUT)
continuous: Perform continuous DMA transfer
(FALSE or TRUE)
drqnum: DRQ channel you want to use. Make sure
it is the same in Step 11 (0 to 3).
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