I'm thinking about writing a C function which basically passes an array/vector of real numbers to a VHDL implementation as an argument and the VHDL code does some computation using the array in a FPGA and returns the result back to the C function. So, my question - How do I go about writing a C function to call the VHDL implementation? Can anyone guide me in the right direction like a tutorial,API or anything? Any help will be appreciated. Thanks! :)
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Well, you know what is left from your VHDL in the FPGA after synthesizing it?
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But anyway: in VHDL you have to DESCRIBE a hardware that computes the numbers. Additional you have to describe the hardware of a interface (SPI, parallel, CAN, whatever) to interchange data between controller and FPGA. After that 90% of the work is done. And then you can write the C function that sends and receives data to and from the FPGA via the interface you implemented in the FPGA. Sorry, but it seems that you have no clue of embedded systems..
Thank you! Yes, I'm just getting started with FPGAs. So, I have no clue about embedded systems. Want to try something interesting.
Schlumpf wrote: > After that 90% of the work is done. > And then you can write the C function that sends and receives data to > and from the FPGA via the interface you implemented in the FPGA. Nirmal Benann wrote: > Want to try something interesting. If you 'just' want to try something interesting, maybe it's a good idea to start with a soft or hard processor (Soc) directly located on your FPGA. The processor where your C program runs in this case is 'closer' to the FPGA, interfacing (hopefully) supported by the tool chain. Running your C program on the PC, you Need to care about your local Drivers, too (USB, ETH, whatever) and Schlumpfs '90% of the work is done' may not quite be true.
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