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Altera_Forum's avatar
Altera_Forum
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15 years ago

Downloading ELF Process failed!

I am running NiosII IDE on my windows 7 professional laptop. When I first create a sopc project and complie and download *.sof into target board, then I also create a demo NiosII project "Hello world...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
8 years ago

Make sure that timing is closed on the JTAG interface. USB Blaster II cables run at 24MHz by default. This should be constrained in your Quartus project like this: 

create_clock -name {altera_reserved_tck} -period 40 -waveform {0.000 20} { altera_reserved_tck }

If you need to slow down the clock rate with a USB Blaster II cable, run this command in a Nios Command Shell or Windows Command Shell. 

jtagconfig --setparam 1 JtagClock 6M