New Contributor
New Contributorhi @JonWay_C_Intel
Thankyou for your reply.
yes, terasic have some projects about ADC, I learn a lot from their examples.
unfortunately, I only find AD9254 documentation for nios processor application, and the 9254 IP file cannot be modified to AD9248.
from platform design, I set parallel data from ADC as PIO (parallel I/O, width 14 bit) and directly read in c using command "IORD (adc_base, 0)" without on-chip memory as buffer.
if anyone can confirm, do I have to use on-chip memory to store adc data capture before processed in nios? thank you
Frequent ContributorHi @Isnan Sorry for the delayed response. Did you find a solution? Have you tested with/without on-chip memory? I think you probably need the on-chip if you are not reading from the NIOS fast enough. Else, your ADC will be overwriting its data even before the NIOS is able to read it.
New ContributorHi @JonWay_C_Intel
Unfortunately, I don't find the solution yet. I change the ADC because of limited time. I am using serial ADC with spi interface for now. For first step, it is good enough but of course slower speed. Thank you for the suggestion anyway. I will learn again about parallel ADC to FPGA because I have to use it for final project to catch the speed.
