6224 Driver

[lorenze]

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I've coded an RTX driver following the flow in example aiex1.cpp.  Setup for 7 channels.  Implemented all except I did not implement the aiGetScalingCoefficients.  Is it required?  What is it?   What changes are needed to setup for single ended common ground, instead of differential?  Is it necessary to have a voltage present on the 6224 during integration testing?   After initialization the JOINT_STATUS_2 returns 0x90 indicating that AI_Scan_In_Progress_St, and AI_EOC_St, and never clears.   Can't read from the FIFO unless the AI_Scan_In_Progress_St clears.  Since NI doesn't provide a manual I have no idea what this means, except that these flags never clear.  So where is the FIFO data?  Why are we using a FIFO.   Is there a mapped memory option instead?  I am not using DMA. What exactly is flush call used in example code?  Are delays required between register commands?  Single stepping through the code gives the same JOINT_STATUS_2 status. The example code calls write/read methods.  Does every write put zeros in non specific register bits? Do you have a direct register accessing sequence with HEX inputs which shortcuts the labored methods used in the examples?  All I want is to read 7 analogs on demand at 100Hz. Hope someone has answers.  Thanks.

[David S.]

Hi lorenze -

This looks like a duplicate post of the one here.