RS232 interface, DE2-70 board

Unfortunately I cannot explain all of what I did here. It took a lot of time but I can tell you some things that should help. First I would suggest truly reading the entire manual for the DE2-70 board. That helped me an extreme amount. Second if you are trying to interface with a Doran scale I would suggest reading that entire manual as well (that one is a long one). This again is very time consuming and you will have to probably read them over again but it helps a great deal.

For setting up the RS-232 port I used the SOPC builder and generated a soft core processor in which I added the RS232 input. There are some demos on the altera site that helped as well but you will have to dig for them they don't just pop out.

Once you learn all those things from the manuals and demos you will have to make sure that you read the section for the data transmitting in the Doran scale carefully and ensure you are using the correct outputs (I had to switch mine because the manual is not very clear and I think it might be wrong can't remember though). So call Doran if you have issues and they should be able to help.

Hope this helps and sorry but it's something that is just going to take some research and time unless I was right there next to you.

Good Luck! If you have any more questions later that I could help with, let me know and I will try.