Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

Communication PC-De0 Nano

Hello everyone, I need to make a GUI that could communicate between pc and my De0 nano. I could make the GUI with QT but I don't know how the communication work. I am aware that every time I c...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

--- Quote Start ---

The USB interface to the DE0-nano is a USB-Blaster.

You can communicate from the host via a couple of mechanisms;

1) SLD Virtual JTAG core, and quartus_stp Tcl procedures

2) JTAG-to-Avalon-MM master and SystemConsole

3) Direct access via FTDI drivers

--- Quote End ---

I'm also trying to communicate via my PC to the DE0-Nano via the current USB connection. I was aiming to do basically option# 3, but Terasic wouldn't provide me any schematics for how the FTDI chip is connected to the Cyclone IV.

I'm now looking into the JTAG options. I'm curious about how I actually assign the pins for working with the JTAG? I noticed when I create a JTAG interface using the Qsys w/ NIOS I never have to make any assignments in the Pin planner.

I've tried to generate a vJTAG using the megafunction wizard, and I can get to the point where my block is created (I'm using the schematic entry), but I have no idea how I assign the pins. The JTAG pins are not available in the Pin Planner...Are they automatically connected somehow?

(I'm still very new to this JTAG stuff so I might be completed confused about how to work with it :-)

Thanks!

Chris