H563ZI I3C GETACCCR

[Xonier]

Hello!

I set my H563ZI I3C to master and attach it to another I3C secondary master. Now i want to test GETACCCR CCC. The firmware "en.stm32cubeh5-v1-2-0" only has the case that slave request mastership from current master. I want to know how to send GETACCCR to secondary master so that i can give masetship to secondary master as MIPI I3C V1.1 said.

Thanks!

[Foued_KH]

Hello @Xonier , 

The Command Code for the GETACCCR Direct CCC is 0x91.
If a Controller-capable Device intends to pass the Controller Role to another Controller-capable Device, then it shall support this CCC. 

You can send the command ( a direct transfer ) , you can check the section 9.7 Direct read , AN : Introduction to I3C for STM32 MCUs - Application note

Let me know!
Foued

[Xonier]

Hello Foued ! Thanks for reply! Sorry for my late reply. Finally i send GETACCCR successfully . I use the code from "STM32Cube_FW_H5_V1.1.0\Projects\NUCLEO-H563ZI\Examples\I3C\I3C_Controller_Switch_To_Target" .

And if i want to use DDR transfer which board should i buy? Thanks!

[Foued_KH]

Actually we support only SDR mode.