Long FPGA compilation time ( 30 hrs)

Question

I am writing some small test programs to check a PXI-7831R FPGA card.
One program is a FOR loop inside a WHILE loop with a single AI read. I run the FOR 1000 times, then output a 1000-element array of 16-bit AI values through auto-indexing. This program compiled for 31 hours and 15 minutes before I aborted.
Is there a reason for such a long compile time (too large an array)?
Are there certain programming architectures that I should avoid on FPGA (e.g., nested loops)?
I am running LVRT7.1 on a PXI-8145RT. There is also a 7350 motion board installed, though not used in this program.
Thanks.
Laine

Answer 1

I've read somewhere in the FPGA documentation that arrays in FPGA applications should be limited to 32 elements. The consume a large amount of space on the chip, so you need to be careful when using them.
Ed
Ed Dickens - Certified LabVIEW Architect - DISTek Integration, Inc. - NI Certified Alliance Partner
Using the Abort button to stop your VI is like using a tree to stop your car. It works, but there may be consequences.