S32K146 I2C Master Clock Stretching

[Andy_Wang_JP]

Hi NXP Team

I got a project to implement I2C communication between S32K146(Master) and another device(Slave). 

But according to the application note of the device,"The I2C master on the MCU MUST support clock stretching.Because the ACK/NACK is not automatically responded with device's hardware block, it's from its firmware interrupt"

But I've checked the S32K RM,it seems to only when S32K as a slave support clock stretching. 

So does it have any method that S32K I2C Master support clock stretching? or I missed something in the RM then how to configure that in S32DS IDE?

Thanks and waiting for reply

Andy

[Senlent · Accepted solution]

Hi@Andy_Wang_JP

you can take a look at the S32K-RM Chapter 52.3.2.5 Error Conditions.

and I send you a private message, and some test cases about how to deal with slave stretching features.

BR,

     Jim,

[RML_SPARKY]

Hi, 

I am finding the same issue with my S32K144EVB in Master mode using the LPI2C examples. Can you send me some examples on how to enable clock stretching as the the Reference manual confuses me.

thanks
Rich

[Andy_Wang_JP]

Hi Jim

Thanks for your reply

I'll try the method you suggestion, and see what I got.

BR.

Andy