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This reference is for Processing 3.0+. If you have a previous version, use the reference included with your software in the Help menu. If you see any errors or have suggestions, please let us know. If you prefer a more technical reference, visit the Processing Core Javadoc and Libraries Javadoc.

Class | SPI
Name | ### settings()
Examples |
    import processing.io.*;
    SPI adc;

    void setup() {
      //printArray(SPI.list());
      adc = new SPI(SPI.list()[0]);
      adc.settings(500000, SPI.MSBFIRST, SPI.MODE0);
    }

    void draw() {
      // read in values over SPI from an analog-to-digital
      // converter
      // dummy write, actual values don't matter
      byte[] out = { 0, 0 };
      byte[] in = adc.transfer(out);
      // some input bit shifting according to the datasheet
      int val = ((in[0] & 0x1f) << 5) | ((in[1] & 0xf8) >> 3);
      // val is between 0 and 1023
      println(val);
    }
Description | Configures the SPI interface The default setting is: 500000, SPI.MSBFIRST, SPI.MODE0
Syntax |
    .settings(maxSpeed, dataOrder, mode)
Parameters |
maxSpeed | int: maximum transmission rate in Hz, 500000 (500 kHz) is a resonable default
dataOrder | int: whether data is send with the first- or least-significant bit first (SPI.MSBFIRST or SPI.LSBFIRST, the former is more common)
mode | int: SPI.MODE0 to SPI.MODE3
Returns | void

Updated on November 10, 2017 05:36:31pm EST