Lots of I2C ANACK messages with ATECC508

RE: Lots of I2C ANACK messages with ATECC508

Øivind — Tue, 22 Feb 2022 11:22:54 GMT

Ok, I am not familiar with that library, so my recommendation would be to hear Microchip's thoughts on the issue.

If you find something that is not working correctly on our side, let me know.

RonanB96 — Tue, 22 Feb 2022 10:44:13 GMT

Got a logic trace of multiple transactions and it seems all of the ANACKs are coming from the cryptoauthlibs wake-up function.

It writes 0x01 to address 0x00 to wake up the ATECC508A and then does the write/read so I guess I can ignore those ANACK errors

Øivind — Mon, 21 Feb 2022 12:23:10 GMT

Hi,

Could I see a logic trace of the I2C lines?

[quote user=""]The I2C comms has not actually failed so far as we have a high retry count for the ATECC508A configuration.[/quote]

What do you mean by this? Are you able to communicate after a number of retries?

Have you double checked the voltage, ground and signal levels?