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.
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.
BTW, current Non os SDK_V1.5.2 has already supported this funtion.
Any more questions, please feel free to let us know.
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?
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