Forum Discussion

FHint's avatar
FHint
Icon for Occasional Contributor rankOccasional Contributor
3 years ago
Solved

I2C Master IP Core doesn't send ACK after receiving first of two bytes

Hello, I am using the Intel I2C Master IP Core to communicate with a temperature sensor (TMP75B) on a custom PCB including an Arria 10 GX FPGA. The hardware is not yet present therefore I am curren...
  • ShengN_altera's avatar
    ShengN_altera
    3 years ago

    Hi Florian,


    Check this previous KDB https://www.intel.com/content/www/us/en/support/programmable/articles/000086390.html.

    You can't observe the ACK signal from simulation is expected as the ACK and NACK is handled by the controller itself.

    However, you can use NACK_DET to check in case of master write to slave so that you'll know whenever there is no acknowledgement from slave. Hope it helps.


    Best Regards,

    Sheng

    p/s: If any answer from community or Intel support are helpful, please feel free to mark as solution and give Kudos.


ShengN_altera's avatar
ShengN_altera
Icon for Super Contributor rankSuper Contributor
3 years ago

Hi Florian,


Check this previous KDB https://www.intel.com/content/www/us/en/support/programmable/articles/000086390.html.

You can't observe the ACK signal from simulation is expected as the ACK and NACK is handled by the controller itself.

However, you can use NACK_DET to check in case of master write to slave so that you'll know whenever there is no acknowledgement from slave. Hope it helps.


Best Regards,

Sheng

p/s: If any answer from community or Intel support are helpful, please feel free to mark as solution and give Kudos.


FHint's avatar
FHint
Icon for Occasional Contributor rankOccasional Contributor
3 years ago

Hi Sheng,

thanks for the quick answer!
I have found that KDB when looking for a solution, but I thought it said that I could not control the ACK and NACK of the I2C Master IP core manually. Seems like I misinterpreted it.

It's a pity that I am now not able to simulate the I2C interface, but I guess I'll have to wait for the hardware and test through SignalTap then.

Thanks again and best regards,
Florian