Use AO and AI in the same program

Hello,
I like write a program to use AO and AI in the same program.
In this program write a timer a voltage to a AO port and after then it should read a voltage.
I know how I write voltage to a AO port and read a voltage on a AI port, but not in a the same program.
The read- and the write-Task, should work as soon as possible (<=1ms).
(My timer have 100us ticks)
what should I inilize for the PCI6229 card, to use AO and AI and in which order?
Can I have a example or pseudocode?
Best regards
Heiko Mayer

Hi Heiko-
There is very little overlap between the AO and AI examples, so you should be able to piece the code together pretty easily. I would offer these suggestions:
1. These lines should only be executed once, and they should be done before any AI or AO specific initialization is done:
configureTimebase (board);
pllReset (board);
analogTriggerReset (board); 2. It does not matter which order you perform the AI or AO initialization, but I would recommend waiting to unground the AO reference (by board->AO_Calibration.writeAO_RefGround (kFalse) until all of the AI and AO init is done. This will help to avoid any glitching on the AO lines. The only steps that should be saved until after ungrounding the reference are the Start operations for AI and AO (depending on the AO mode you use, there may not be a specific Start operation to call. Consult the MHDDK examples for more info about the required steps).
Hopefully this helps-
Tom W
National Instruments

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