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Altera_Forum
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11 years ago

Routing HPS I2C thru FPGA Not Working

Hi I followed Altera's guide AN706 (link below) to route HPS' I2C0 port through the FPGA on the Cyclone V Arrow SoCKit. I included the ALT_IOBUFF buffer as instructed by AN706 guide. But it's n...
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Altera_Forum
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9 years ago

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Hi

I followed Altera's guide AN706 (link below) to route HPS' I2C0 port through the FPGA on the Cyclone V Arrow SoCKit. I included the ALT_IOBUFF buffer as instructed by AN706 guide. But it's not working properly. We can send out I2C commands and we can see slave device sending ACK signal through an I2C analyzer. For some reason, the ACK is not reaching the HPS as we keep getting NACK from our code.

We are using Quartus 13.1 while AN706 mentions Quartus 14.0. Not sure if that's the issue. Has anyone successfully routed the HPS I2C port through the FPGA and got it working? Any suggestions/help would be appreciated.

www.altera.com/literature/an/an706.pdf (http://www.altera.com/literature/an/an706.pdf)

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Hey,

I seem to have the same problem here.

Have you found a solution to your problem yet?

I also see the ACK from the slave but the TX_ABRT register says there was no ack and stops.