Just make sure the library you are using allows you to specify your own SS output pin. The only thing you have to take care of is to not use the SS pin as an Input. The SS pin on the Arduino is only used as SS when the arduino is an SPI slave, not (like in your case) when its the master. When I have not configured PIN 53 at all (no configuration and no connection to this pin) my SPI devices work fine (which shouldn't be the case if PIN 53 was MOSI). Hi all, I want to ask that whether we can communicate with Arduino UNO and arduino Mega using SPI communication to configure one as master and another as slave (or vice-versa).If so, please provide a simple code or links (like sending a character or string) between two arduinos using SPI. You can use any pin for the Slave Select. When I try to use SPI while PIN 53 configured as Digital Output, Matlab gives me an error "Board Mega2560, SPI communications require pins D53(MOSI) which is currently in use. According to Arduino, the PINs for SPI are 50(MISO), 51(MOSI), 52(SCK) and 53(SS), this PIN 53 is the slave select pin and is only needed when I am using my Arduino as an SPI slave, when I am not using my Arduino as an SPI slave (like in my case) I can use PIN 53 as a constant digital output. I have installed the MATLAB Support Package for Arduino Hardware so that I can control my Arduino through the GUI I have created in Matlab. Technical Specifications of Arduino Mega. I will discuss about the pins of Arduino Mega in the Arduino Mega Pinout Section. For SPI communication, use the SPI library. Apart from that, the layout of Arduino Mega is very much self-explanatory. Ist entschieden langsamer als die Hardware-SPI, geht aber durchaus. The Arduino Software (IDE) includes a Wire library to simplify use of the TWI bus see the documentation for details. Doch, man kann die meisten Pins beim Mega nutzen-aber dann über SoftSPI. The Mega 2560 also supports TWI and SPI communication. I am trying to control 11 SPI based Digital Potentiometers (AD5292) through Arduino Mega 2560 which is in turn controlled by Matlab. A SoftwareSerial library allows for serial communication on any of the Mega 2560’s digital pins.
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