Can I use Spi and ethernet simultaneously in Arduino Yun

Projects General Guidance
1

Please

I need use a RFID reader/writer with SPI and send the informatión use ethernet simultaneously. I dont know if the arduino Yun can do it, because Arduino Ethernet can work with only one comunication simultaneously. Spi or Ethernet but not both. And I need together

2

Ethernet is the physical communications means for the internet and the SPI is the serial comm. used by Microcontrollers so you cant mix both what you should say is that they both the RFID and ethernet use SPI so you can only use one!

The remedy to it is as follows:

  1. A software SPI library is already out there for Arduino including UNO and the mega, google it or look on PLayground.

  2. You have to be able to select the slave SS pin which is hardwired on many arduino shields and also hardcoded for in the library and its the pin 10 ,you need to mod to library of whatever second SPI based hardware you tend to use to be able to use another pin on the arduino to take SS.

  3. Lookout for a uC that has more than one hardware SPI (out of the realms of arduino hardware right now)

  4. Use more than one uC ,one uC handles the ethernet and another handles the RFID hardware and both communicate with each other using the UART.

3

The Arduino Yun has two processors.
You can see it as a Arduino Leonardo handling the SPI, and the other chip AR9331 which handles the Ethernet communication.

So yes you can handle both