why I3C NACK (use the NUCLEO‑H503Rb and X-NUCLEO-IKS01A3 )

[CLHUANG]

I used the NUCLEO‑H503Rb and X-NUCLEO-IKS01A3 boards to do the I3C protocol sample to get the sensor data on X-NUCLEO-IKS01A3 boards.

I use the I3C sample program in STM32CubeIDE 1.13.0

When I press the USER button on the board, 

and I get the following waveform ,I want ask why nack?

I alreadly check the X-NUCLEO-IKS01A3 boards voltage and sensor voltage is 3.3V and 1.8V,or have any other must chek?

Has any engineer encountered this problem? or some one can help me ,thanks

[CLHUANG]

I use the I3C_Sensor_Direct_Command_DMA  this sample project

and remove the code (under)

#if (defined (__GNUC__) && !defined(__ARMCC_VERSION))

initialise_monitor_handles();

printf("Semihosting Test...\n\r");

#endif

and Get Protocol

[Foued_KH · Accepted solution]

Hello @CLHUANG , 

NACK : because you need to reduce the frequency of the I3C ( Try to use 3MHz for example).

The available example is running with 12.5MHz and the board need to communicate with reduced frequency at the beginning.   

Foued 

[Foued_KH]

Hello @CLHUANG , 

For more details about the I3C communication using STM32 MCUs, please check this application note: Introduction to I3C for STM32H5 series MCU - Application note .

Foued

[CLHUANG]

Dear Foued

I was referring to this page before, but I was still confused about how to write it, so I came up to ask

And because I connected the X-NUCLEO-IKS01A3, I need a sample program, so I used the sample code in the IDE, the name is I3C_Sensor_Direct_Command_DMA, this can make me move, but I need to remove a piece of code.

[Foued_KH]

Hello @CLHUANG ,

For IKS01A3 shield , we have only 2 I3C sensors ( LSM6DSO and LPS22HH ).

You need to communicate with which sensor or with both using I3C ?

Foued