Honored Contributor II
08-26-2014 02:09 PM
Hi, i'm trying to implement an IR interface with FPGA altera de2, cyclone ii.the IRDA ic is hsdl-3201. after looking with osciloscope, i realized that ir signal is modulated by 38khz pulse (with D.C about 90%) so i have built a clock with frequency ~38khz , so sampling at this rate to generate demodulated signal. after that, try to read the trasmit data and count the time the signal is high and low. it doesn't work and i guess there's something basic i don't do /understand. could someone advice plz.