LPC Microcontrollers中的主题 Re: LPC5536 I3C HotJoin

LPC5536 I3C HotJoin

lb_h — Wed, 15 Jan 2025 02:06:16 GMT

Hello,all

LPC5536 as I3C Controller (CR), the bus is in Free state, Target (TGT) sends a Hotjoin request, the i3c_master_ibi_callback of the CR code recognizes the ibiType as kI3C_IbiHotJoin, but the CR only provides 7 SCL clocks, and then SCL stays high. The logic analyzer waveform is below. May I ask what is causing this to occur.

Re: LPC5536 I3C HotJoin

Harry_Zhang — Fri, 17 Jan 2025 09:34:23 GMT

Hi @lb_h

First, you can refer to the lpc55s36 i3c examples to initialize i3c peripheral.

And I think you can try two directions,

Incorrect timing settings for the SCL clock could disrupt the Hot-Join process.

The I3C controller might not fully transition to the appropriate state for handling a Hot-Join request after detecting a bus free condition.

Harry

Re: LPC5536 I3C HotJoin

lb_h — Thu, 17 Apr 2025 06:23:57 GMT

Thanks for your reply, but I still can't pinpoint the problem. the SDK Demos only have examples for handling IbiNormal, not Hotjoin, can you provide one?