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Altera_Forum
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11 years ago

nios ii doesn't run hello world (or sometimes not correctly)

Hi Guys, i have a problem with the niosii. I use a Altera Cyclone IV EP4CE22E22C8N on a selfmade board. The board now only contains a 60MHz Clock, the fpga and a sdram. The Reset and exception...
Altera_Forum's avatar
Altera_Forum
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11 years ago

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Hi Cris72,

between one hello world and another there is no delay. But the output i wrote in the post above doesn't appear everytime. Sometimes i get only an error Download Elf file failed and sometimes the nios ii seems to be running but nothing appears on the Niosii console.

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I have seen this type of things many times, it is usually the NIOS II being run at a clock speed above what the device can handle. The issues downloading are where I generally see the problem with to high of a NIOS clock. You did not state in your post what the NIOS II clock rate was?