Arduino内置教程-通讯-可视颜色混合器
可视颜色混合器
这个例子示范了怎么从Arduino开发板发送多个数值到电脑。从三个电位计读到的数值被用来设置Processing或Max/MSP的后台颜色的红,绿和蓝零件。
硬件要求
- Arduino or Genuino 开发板
- 3 模拟传感器 (电位计, 光敏电阻, FSR,等等)
- 3 10K ohm 电阻
- 连接线
- 开发板
软件要求
- Processing 或者 Max/MSP version 5
电路
连接模拟传感器到模拟引脚pin0,1,2。
这个电路用三个分压器来产生来自压力传感电阻的模拟电压。一个分压器有两个电阻串联,以便合理地分压。
原理图
样例代码
这个传感值作为ASCII-encoded 数字从Arduino发送到电脑。这意味着每个数字是用ASCII字符“0”到“9”发送的。以“234”为例子,共发送了三个字节:ASCII "2" (binary value 50), ASCII "3" (binary value 51), 和ASCII "4" (binary value 52).
/*
This example reads three analog sensors (potentiometers are easiest)
and sends their values serially. The Processing and Max/MSP programs at the bottom
take those three values and use them to change the background color of the screen.
The circuit:
* potentiometers attached to analog inputs 0, 1, and 2
http://www.arduino.cc/en/Tutorial/VirtualColorMixer
created 2 Dec 2006
by David A. Mellis
modified 30 Aug 2011
by Tom Igoe and Scott Fitzgerald
This example code is in the public domain.
*/
const int redPin = A0; // sensor to control red color
const int greenPin = A1; // sensor to control green color
const int bluePin = A2; // sensor to control blue color
void setup() {
Serial.begin(9600);
}
void loop() {
Serial.print(analogRead(redPin));
Serial.print(",");
Serial.print(analogRead(greenPin));
Serial.print(",");
Serial.println(analogRead(bluePin));
}
/* Processing code for this example
// This example code is in the public domain.
import processing.serial.*;
float redValue = 0; // red value
float greenValue = 0; // green value
float blueValue = 0; // blue value
Serial myPort;
void setup() {
size(200, 200);
// List all the available serial ports
// if using Processing 2.1 or later, use Serial.printArray()
println(Serial.list());
// I know that the first port in the serial list on my mac
// is always my Arduino, so I open Serial.list()[0].
// Open whatever port is the one you're using.
myPort = new Serial(this, Serial.list()[0], 9600);
// don't generate a serialEvent() unless you get a newline character:
myPort.bufferUntil('\n');
}
void draw() {
// set the background color with the color values:
background(redValue, greenValue, blueValue);
}
void serialEvent(Serial myPort) {
// get the ASCII string:
String inString = myPort.readStringUntil('\n');
if (inString != null) {
// trim off any whitespace:
inString = trim(inString);
// split the string on the commas and convert the
// resulting substrings into an integer array:
float[] colors = float(split(inString, ","));
// if the array has at least three elements, you know
// you got the whole thing. Put the numbers in the
// color variables:
if (colors.length >=3) {
// map them to the range 0-255:
redValue = map(colors[0], 0, 1023, 0, 255);
greenValue = map(colors[1], 0, 1023, 0, 255);
blueValue = map(colors[2], 0, 1023, 0, 255);
}
}
}
*/
/* Max/MSP patch for this example
----------begin_max5_patcher----------
1512.3oc4Z00aaaCE8YmeED9ktB35xOjrj1aAsXX4g8xZQeYoXfVh1gqRjdT
TsIsn+2K+PJUovVVJ1VMdCAvxThV7bO7b48dIyWtXxzkxaYkSA+J3u.Sl7kK
lLwcK6MlT2dxzB5so4zRW2lJXeRt7elNy+HM6Vs61uDDzbOYkNmo02sg4euS
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lURgVPKbCxzKUbZdySDUEbgABN.ia08R9mccGYGn66qGutNir27qWbg8iY+7
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.PS+.qDPAkZkgPlY5oPS4By2A5aTLFv9pounjsgpnZVF3x27pqtBrRpJnZaa
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7bqsBRULGvwfWyRMyovElat7NvqoejaLm4f+fkmyKuVTHy3q3ldhB.WtQY6Z
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HXZpVFfu2FxXkZtfp4RQqNkX5y2sya3YYL2iavWAOaizH+pw.Ibg8f1I9h3Z
2B79sNeOHvBOtfEalWsvyu0KMf015.AaROvZ7vv5AhnndfHLbTgjcCK1KlHv
gOk5B26OqrXjcJ005.QqCHn8fVTxnxfj93SfQiJlv8YV0VT9fVUwOOhSV3uD
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iadi39rf4hwc8xdhHz3gn3dBI7iDRlFe8huAfIZhq
-----------end_max5_patcher-----------
*/
[Get Code]
Processing 代码
从上面的样例代码里复制processing程序。随着你改变模拟传感器的值,背景颜色会发生改变:
Max 代码
max程序看起来像这样。复制上面样例代码的文本,然后粘贴到新的Max窗口。
更多
- serial.begin()
- serial.print()
- analogRead()
- ASCIITable - 示范使用Arduino的高等的串口输出函数。
- Dimmer - 移动鼠标来改变LED灯的亮度
- Graph - 发送数据到电脑,然后在Processing里画出它的图表。
- Midi - 连续发送MIDI音符信息
- MultiSerialMega - 使能Arduino Mega上2个串口。
- PhysicalPixel - 通过从Processing或者Max/MSP发送数据到Arduino上,使LED开关。
- ReadASCIIString - 分析整数里一个用逗号分隔的字符串,来使一个LED灯褪色。
- SerialCallResponse - 通过一个呼-应的方法(握手)来发送多个变数
- SerialCallResponseASCII - 通过一个呼-应的方法(握手)来发送多个变数,并在发送前解码(ASCII)这些数值。
- SerialEvent - 使用SerialEvent()函数
- VirtualColorMixer - 从Arduino发送多个变数到你的电脑,然后在Processing或者Max/MSP上读取这些数据
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