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Altera_Forum
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13 years ago

NIOS II memory writes failing - values being input at wrong addresses (I2C opencore)

Hi, I'm trying to integrate an I2C core from opencores to my Cyclone IV device. Apparently the version I'm using should just drop into the SOPC and work after being wired to some outputs (alter...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

It is really strange that you don't see any trigger on the write signal, even on the CPU. I'm not sure which one this second signal is though... can you look for the CPU's data master and find it's write signal? If you still don't see anything there must be something wrong with your Signaltap, because if the CPU never writes anything it just can't work!

Did you set several triggers in signaltap? If yes it will only trigger when *all* triggers are asserted simultaneously, so you need to make sure you only set one signal as trigger at a time.