Accessing I/O

[awesomeer]

Is there any way to access the digital IO on the sbRIO-9637 without having to use LabView?

[setupatel]

Hi,

How did you want to access it?

[awesomeer]

I want to access it using the CPU but I cannot do that because the FPGA is connected to IO and I don't want to program the FPGA using LabView. Is there a default C API available online that I can use to access the IO?

[j0hannB]

Bump.

Anyone have thoughts on this? 

I'm working with awsomeer on the same project, and it would be really nice to access the I/O without having to write much LabView. Our team has a lot of C/C++ experience but very little LabView experience. We're using the NI Linux Real-Time toolchain to write our application in C++.  

[j0hannB]

We would also like to access the I2C and SPI buses 

[setupatel]

Hi,

I think this is what you are looking for. 

https://www.ni.com/en/support/documentation/supplemental/09/introduction-to-the-fpga-interface-c-api...

Let me know if you have questions.

[j0hannB]

Thanks for the reply! 

I did see that page, but my understanding was that we would have to write a custom labview wrapper for the I/Os we want to use and then generate a C API to call functions in our custom VI. Is that correct? 

Is there a default VI running on the FPGA that we can access from the CPU without writing our own labview code?