DE2-115 and Terasic High Speed AD/DA daughter card

Alex,

Thanks for reply and a big apologize for wrong link. This is the card which I am using http://www.terasic.com.tw/cgi-bin/page/archive.pl?language=english&categoryno=67&no=360.

I think they are following same principle and structure.

In my case finally I could somehow manage the pin assignment by using the terasic example project and now I can see toggling of bits with logic analyzer. I have attached the picture.

- BUT I have not attached any input signal? What is this toggling for?

- There are some signals which do not toggle/change like as ADA_OE and ADA_SPI_CS! Is one of them my input signal?

- What signal is your input when using THDBA_ADA card?

Regards

P.S: I have attached the code. It is simple code which transfer input to leds. I used a frequency divider to slow down the clock speed to see the LEDs lighting. The question is why I can see toggling of bits/LED blinking without any input?