STM32H563ZIT6 I3C master read buffer question

[Xonier]

          Hello! I dont know where to find received data after HAL_I3C_Ctrl_Receive_IT progress.

          I set I3C of my H563 as master and sent ENTDAA and master read , the slave answered both command. The interrupt of slave reflects that master read is done and the data in tx-fifo is transferred correctly. But when i read RxBuffer of the HAL_I3C_Ctrl_Receive_IT i find nothing but 0.

          Can anybody help me?Thanks!

[Foued_KH]

Hello @Xonier ,

Could you please use an oscilloscope to check SDA and SCL behavior?
Make sure that the dynamic addressing is done correctly .

Let me know!
Foued

[Xonier]

Hello!

        I am sure ENTDAA is done because i have read the address in slave regs . I am thinking about if i used HAL_I3C_Ctrl_Receive_IT incorrectly.

[Foued_KH]

You can check the available examples ( Private Read/Write ) in the STM32Cube FW : 
STM32Cube_FW_H5_V1.2.0\Projects\NUCLEO-H503RB\Examples\I3C

some details are in this Application Note - Section 9.8 : https://www.st.com/resource/en/application_note/an5879-introduction-to-i3c-for-stm32h5-series-mcu-stmicroelectronics.pdf

Foued

[Enoch]

Can you share how it was resolved？Thank you