Hello,

I'm thinking about an AR91SAM9G25 / AR91SAM9G45 based design which has two memory SD-cards (always present) and a WiFi module, under the Windows CE OS.

Since all the Win CE drivers I found, for different chips, provide only a SDIO interface, and the above mentioned processors have only two HSMCI peripherals, what would be the best solution: To rewrite the WiFi drivers (assuming the source code is available) into using the SPI (which most WiFi chips support) or to rewrite the SD driver for the memory cards?

Is there also a third possibility? Can I multiplex two SDIO devices (WiFi and SD memory card) so that they are using only one HSMCI peripheral? Does the SDIO standard allow this? Or it is more of an OS issue?

Any comments and thoughts are welcome.

Best regards,
Draghi Puterity