I3C Error on STSW-IMG506_H5 Example

[Noeldi]

I connected the VD55G1 promodule on the LS-CAM-I3C and connected it to the NUCLEO-H563ZI.

The Display X-NUCLEO-GFX02Z1 is also connected.

This is exactly the same configuration from the README.md.

I get always an error in "ret = platform_i3c_assign_dynamic_address(p_dev->p_ctx);" (Line 82 display_qvga_streaming_i3C.c)

I3C Error

According to https://www.st.com/resource/en/user_manual/um3224-how-to-integrate-and-configure-the-vd55g1-sensor-stmicroelectronics.pdf Page35 I assume a ACK at the second W=0x7E (ENTDAA).

I have a very shot cable between the NUCLEO Board and the LS-CAM-I3C.

What could be the Problem

[Noeldi · Accepted solution]

Solved

I added a 15 Ohm Resistor on each end of SDA and SCL and twisted a GND Cable around this two connections.

Now it works stable.