S32KのトピックS32K358 uSDHC async mode

S32K358 uSDHC async mode

Fanta — Thu, 24 Apr 2025 12:00:59 GMT

Hi,

I am trying to use async data transfer mode of uSDHC, are there any detailed instructions? It seems the example project 'Usdhc_Ip_Example_S32K358' only shows how to use polling mode.

For example, in the code above, is it ok to simply change the last parameter to 'True' to use the async mode? However, as far as I know, there should be an interrupt to inform CPU the transfer has ended.

So how should I configure the async mode correctly?

Best wishes

Re: S32K358 uSDHC async mode

PetrS — Wed, 30 Apr 2025 10:25:45 GMT

Hi,

as far as I know module interrupt are enabled by driver and in case of Async mode you should configure user callback as well in Usdhc component and this callback will be called upon that event happen.
However I am not aware of the demo for this.

BR, Petr

Re: S32K358 uSDHC async mode

Fanta — Thu, 19 Jun 2025 03:25:40 GMT

Hi PetrS,
I read the RTD driver code again, and I think I found the answer. In 301 line of Usdhc_Ip.c, there is an ISR for uSDHC, in which the transfer complete flag is set. Users don't need to implement it in callback function, but need to set the ISR in IntCtrl_Ip as the example project shows. The RTD driver is good enough however I think the user manual of RTD can be more detailed.
I write this discovery here in case anyone else wants to know.

Best wishes