STM32 H5 I3C CCC transmit

Sunwaz · ‎2024-02-25

I used STM32H563 transmit a message through I3C CCC direct.

I create a new CCC command "0xA0".Control send the command to target.But target will enter

HAL_I3C_ER_IRQHandler

Uesd the general command "0x89".The target can receive this command. The Buffer is same.

Foued_KH · ‎2024-02-27

Hello @Sunwaz ,

You can't create a new CCC command because these commands are pre-defined.
You should use the available commands for the CCC direct transfert.

Thank you!
Foued

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Sunwaz · ‎2024-02-25

I need to send a buffer to the target via the contorller's I3C CCC direct.

Foued_KH · ‎2024-02-27

Hello @Sunwaz ,

You can't create a new CCC command because these commands are pre-defined.
You should use the available commands for the CCC direct transfert.

Thank you!
Foued

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Sunwaz · ‎2024-02-27

Hi @Foued_KH

Thanks a lot!

And i have another question: can the target of I3C send data to the master of I2C?My system doesn't necessarily have an I3C controller.

Foued_KH · ‎2024-02-28

The I3C bus only supports I2C targets.
You can configure the I3C bus :

Foued

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Sunwaz · ‎2024-02-29

Hi @Foued_KH

When the controller sends data to the target, if the sending fails, the system will enter a hardfault.

The reason is that the hi3c->ptrTxFunc pointer will be cleared in the I3C_ErrorTreatment function, but the hi3c->ptrTxFunc null pointer will be called in the retransmission function, resulting in an error, which is unreasonable.

Foued_KH · ‎2024-02-29

For communication : I3C controller with I3C target or I2C target on I3C bus :
Make sure that you are using the dynamic address first for the I3C target after the dynamic address process ( pure bus ) or the static address of the I2C target ( mixed bus ) before starting the Private/Direct transfers.

For more details about I3C communication, you can check :
I3C Application Note : Introduction to I3C for STM32H5 series MCU - Application note

I3C WIKI : Getting started with I3C - stm32mcu

You can also check the available examples in the STM32H5 CubeFW STM32Cube_FW_H5_V1.1.1\Projects\NUCLEO-H503RB\Examples\I3C

Foued

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Sunwaz · ‎2024-03-07

Hello @Foued_KH

My target got dynamic Address . My controller send "HAL_I3C_Ctrl_IsDeviceI3C_Ready",the target will enter frame error.Error code is 0x100000.

I dont understand.

Sunwaz · ‎2024-03-07

I know the cause，ST's library only supports fixed-length receptions. If Tx size is not amount Rx size , it will generate

HAL_I3C_ERROR_SIZE error code.