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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 | ### close()
Examples |
    import processing.io.*;
    SPI adc;

    void setup() {
      //printArray(SPI.list());
      adc = new SPI(SPI.list()[0]);
      adc.settings(500000, SPI.MSBFIRST, SPI.MODE0);
      // read in a value 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);
      // and close interface again
      adc.close();
    }
Description | Closes the SPI interface It is normally not necessary to explicitly close SPI interfaces, as they are closed automatically by the operating system when the sketch exits. Note: It is possible to have two or more objects using the same interface at a time.
Syntax |
    .close()
Returns | void

Updated on January 9, 2020 00:33:14pm EST