Forum Discussion
Altera_Forum
Honored Contributor
14 years agoYou can try to open the Quartus II to see whether download the sof file is possible.
If Quartus II can find your connection and you can download the sof but NIOS II still can't find your connection, try to click the refresh connection button for several times. If you even can't download the sof, there may be something wrong on your board. (For example, my DE0 board have a RUN/PROG Switch for JTAG/AS Modes)