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dkim37
Beginner
366 Views

How can I use the loan I/O?

Hello I am new to fpga.

I try to use uart for send data to pc.

I use de1-soc and there are two part FPGA and HPS.

According to my understanding, UART is connect with HPS, so I should borrow the pin use loan IO.

In the back, I attached a picture of how I did it.

​First I only use tx, so I activated loan io 62.

loanio활성화.png

and export loan ioloanio핀뽑기.png

and make this code (loan io oe 62 <=1 (out) / loan io out 62 <= uart_txd62번 아웃에 TXD 연결.png

​It is my top level. I have another code for uart탑레벨엔티티.png

Compile is completed but uart is not working.

Please advise for me. what is wrong. and how to use loan I/O

Thanks a lot.

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4 Replies
VROGE2
New Contributor I
78 Views

Did you ever figure this out? I am also trying to use the UART on a cyclone V SoC using LoanIO but I am having some troubles.

dkim37
Beginner
78 Views

We haven't solved your problem yet.

I contacted a local Intel company but did not receive an accurate response.

Please let me know if you can solve it.

We are just buying uart-gpio and using it.

VROGE2
New Contributor I
78 Views

Upon a second look at your code I noticed that you're using LoanIO 62. From some of the other research I have done on this subject I believe that you have to use LoanIO 50 as the TX. I could be completely wrong but it might be something that would be worth a shot. The UART-GPIO may be the way to go for me as well if I can't get mine to work either so let me know how that goes.

TSche18
Beginner
78 Views

Anybody something new? Have the same problem since...I don't know when, but nothing helps