Modify esp8089 driver's firmware

[DG2016]

Dear Espressif members,

First of all I would like to thank you for providing this communication channel. I am new to the community and I really appreciate the help the topics discussed in the forum gave me.

I am currently working on a project in which I have my ESP8266 module connected to a Raspberry Pi via SDIO.

I am using model ESP-03, so I needed to desolder the flash off the chip to expose the SDIO pins so I could wire it to the Raspberry Pi.

So far the module is working perfectly as a wifi adapter and I can connect to an AP without any issues.

In order to make that work from the Raspberry Pi, I needed to compile esp8089 Linux kernel module (I got the source code from this github repository: https://github.com/al177/esp8089 ).

I was wondering if there is any possibility I could modify the default firmware (included in eagle_fw1.h, eagle_fw2.h, eagle_fw3.h ) and put my own.

My idea was to use the SDK you provide, write my own code, compile it, and use that in esp8089 driver so it can load it to the ESP8266 module via SDIO when connected to the Raspberry Pi.

Do you think there is any possibilities I can do that? If so, how could I do it?

Is there a way I can get the source code of that default firmware?

This would really help me.

Thanks for your time!

Dana

[ESP_Greg]

Hi,
We have a sample code for SDIO interface. You can see sdio_slv.c in SDK driver folder.