Libraries \ SPI

Reference for Wiring version 1.0 Build 0100+ If you have a previous version, use the reference included with your software. If see any errors or have any comments, let us know.



// just send binary number 0b10011100

// send a dummy 0x00 byte, read a byte back and store it on 'data'
int data = SPI.transfer(0x00);
Description The Serial Peripheral Interface Bus or SPI bus is a synchronous serial data link standard named by Motorola that operates in full duplex mode. Devices communicate in a master/slave mode where the master device initiates the data frame. Multiple slave devices are allowed with individual slave select (chip select) lines using a pin for each device. The transfer() method exchanges bytes of data. On Wiring v1 boards the SPI pins are: SS=24, MOSI=25, MISO=26 and SCK=27. On Wiring S board the SPI pins are: SS=20, MOSI=21, MISO=22 and SCK=23.
variable = SPI.transfer(data)
data data: byte
Returns byte
Usage Application
Updated on July 07, 2011 11:11:44pm PDT

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