before to start a new project, I need an information.
My project will use two SPI devices: a ESP8266 (NodeMCU ESP-12E) and a RFID card reader, so they will need to share SPI interface (on Arduino Nano or Pro). I known I must use a different SS pin for each device, but other pins will be shared thru devices.
RFID Library will have no problem to share SPI, it manage the SS line (I saw this in .ccp file), putting it low immediately before read or write on SPI bus and put it high as finished. Anyone know if ESP8266 do the same or if it use SPI in exclusive mode?
I’tried to read some ESP8266 library files but I’ve not found SPI reference, so I’m not able to understand it.