close() / Libraries / Processing.org

Name

close()

Class

SPI

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.

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();
}

Syntax

.close()

Return

void

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.