I3C TxFIFO target limit

[I3c_master]

Hello,

I am working with the STM32H503 board and using the I3C TX FIFO in target mode for communication. However, I have encountered an issue where, when transmitting data, the FIFO is only sending 8 bytes in total.

I would like to configure the TX FIFO to send up to 255 bytes instead of the default 8 bytes. Could anyone advise on the correct configuration or settings to achieve this? Specifically, I am interested in any register settings or FIFO-related parameters that need adjustment.

Find attached my I3C configuration.

Thank you for your help!

[Saket_Om]

Hello @I3c_master 

Please refer to the AN5879 to set your I3C communication.

[I3c_master]

Hello @Saket_Om,

I did the same configuration as in the referred document, however the it is only transferring 8 bytes only. In addition, if I configure it lower than 8 it works, but it seems that it is limited on 8 bytes, what do you think might be the problem?

[Saket_Om]

@I3c_master 

Could you please share your code and IOC file so that we can assist you more effectively?