45 lines
1.3 KiB
C++
45 lines
1.3 KiB
C++
/*
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Dimmer
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Demonstrates sending data from the computer to the Maple, in this
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case to control the brightness of an LED. The data is sent in
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individual bytes, each of which ranges from 0 to 255. Maple reads
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these bytes and uses them to set the brightness of the LED.
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The circuit:
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LED connected to pin 9.
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Serial connection to Processing, Max/MSP, or another serial application.
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created 2006
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by David A. Mellis
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modified 14 Apr 2009
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by Tom Igoe and Scott Fitzgerald
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http://www.arduino.cc/en/Tutorial/Dimmer
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http://leaflabs.com/docs/lang/api/pwmwrite.html
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Ported to the Maple 28 May 2010
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*/
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int ledPin = 9;
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void setup() {
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Serial.begin(115200); // Ignored by Maple. But needed by boards using hardware serial via a USB to Serial adaptor
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// Declare ledPin as an OUTPUT:
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pinMode(ledPin, OUTPUT);
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}
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void loop() {
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int brightness;
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// Check if data has been sent from the computer:
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if (Serial.available()) {
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// Read the most recent byte (which will be from 0 to 255), then
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// convert it to be between 0 and 65,535, which are the minimum
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// and maximum values usable for PWM:
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brightness = map(Serial.read(), 0, 255, 0, 65535);
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// Set the brightness of the LED:
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pwmWrite(ledPin, brightness);
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}
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}
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