Sets the SPI data mode: that is, clock polarity and phase. See the Wikipedia article on SPI for details.
Extended method for Arduino Due
If you specify one of the Arduino Due's Slave Select (SS) pin in the call to setDataMode(), the data mode setting is applied only to the device connected to the specified SS pin. More info on extended methods: Due Extended SPI usage
|SPI.setDataMode(slaveSelectPin, mode)||(Arduino Due only)|
|slaveSelectPin||slave device SS pin||(Arduino Due only)|
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