ESP8266 Community Forum

Hi everyone,

I'm working with an ESP8266 in HSPI slave mode connected with an Atmel Atmega 328p in master mode. Communication works fine until I try to share the SPI interface with another device as a slave. Obviously, I have two different chip select (one for esp and one for the other device). Every time I send a message to the other device (with esp's CS set HIGH) the next communications with esp fail.
Has anyone ever faced a similar issue? Is it possible to use esp as a slave with other devices connected?
I'm using the Arduino Core 2.4.0 on the esp with SPISlave library and the classical Arduino SPI library on 328p.

Thanks

Sounds like some registers need adjustment. u must have command bits, address bits, and optionally databits along with interrups and overall 'transaction' defined. if you are just using library, they dont have it right. I looked to docs for ESP32 ... much better written!! and almost same for esp8266. Cant use actual register numbers in that doc but u can googoogle the macro names and find better written and more complete header files with register values etc.