HSPI Flash possible?

[i4vine]

Hello!

I would like to pump a lot of data into ESP8266 so I want to use SDIO for high speed connection from a host microcontroller.
But the problem is primary SDIO/SPI pins already been used by flash chip (BTW, my test board is ESP-12-E).

Is it possible to switch a flash to HSPI (the second SPI as far as I know) so I can download and run my firmware?
Or is there any other way that my code can program SDIO without conflict?

I couldn't find any doc and sample code regarding this around here.
Any help would be greatly appreciated.

Regards,
Sean

[Espressif_Kelly]

Dear i4vine，

ESP8266EX can support to work as SDIO/SPI slave and then external SPI flash should be moved to HSPI interface.
You can refer to "8H-ESP8266__Interface_SDIO_SPI_Mode" for details.
http://bbs.espressif.com/viewtopic.php?f=51&t=819
BTW, current Non os SDK_V1.5.2 has already supported this funtion.
Any more questions, please feel free to let us know.
Thanks.

[raspberrypidmx]

Hi Kelly,

Where can we download the STM32 source code which is mentioned in http://espressif.com/sites/default/file ... .1-2_0.pdf ?

Do you also have a detailed description how to upload user code using SDIO?

Thanks, Arjan

[Espressif_Kelly]

Hi,

You can get sdio_slv.c in our SDK which can be obtained in the below links.

viewtopic.php?f=46&t=850

More questions, please feel free to let us know.

Thanks.