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Altera_Forum
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8 years ago

connect hps to fpga

Hi, I'm using de-10 standard and I need to connect RX and TX signals to UART, but i need them to connect to FPGA. I know you can connect hps to fpga, but I cannot find any examples for my...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
8 years ago

Loan I/O means that the HPS's own (dedicated I/O) are "loaned" to the FPGA fabric. In this way, externally the pins are connected to the UART-USB converter, but they are routed to the FPGA logic (instead of the HPS's UART controller) - do note that their mux and I/O settings are stilled controlled by the HPS, hence the need for the updated preloader.

I assume that your FPGA IP requires both RX and TX, hence the suggestion to set both I/Os as loan IO. Try looking at this example here:

https://www.youtube.com/watch?v=crwzmsj1jkg