Difference between revisions of "Week 4 Lab"
From Robert-Depot
(→Serial Interface, for debugging) |
(→modifying for rudimentary keyboard control) |
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if((val>='0')&&(val<='9')) | if((val>='0')&&(val<='9')) | ||
| − | analogWrite(ledPin, | + | analogWrite(ledPin, 28*(val-'0')); |
} | } | ||
} | } | ||
| + | |||
| + | * Connect up the TIP120 driver circuit and motor from last week. Voila! You have a simple motor speed control, through the computer. | ||
| + | |||
=== controlling from a Processing app === | === controlling from a Processing app === | ||
See the commented out Processing code at the end of Dimmer example. | See the commented out Processing code at the end of Dimmer example. | ||
Revision as of 20:52, 20 April 2009
Contents
Interfacing
- Download and install processing http://processing.org/download
Serial Interface, for debugging
Sketchbook->Examples->Communication->ASCIITable
Basic text output from the microcontroller,
Serial.print()
and
Serial.println()
Use this to verify values and behavior inside of a program, for debugging. Examples:
- Displaying values of sensors
Serial.print(val) - Checking program flow.
Dimmer
Examples->Communication->Dimmer Controlling a physical LED with the computer.
modifying for rudimentary keyboard control
void loop()
{
char val;
// check if data has been sent from the computer
if (Serial.available()) {
// read the most recent byte (which will be from 0 to 255)
val = Serial.read();
if((val>='0')&&(val<='9'))
analogWrite(ledPin, 28*(val-'0'));
}
}
- Connect up the TIP120 driver circuit and motor from last week. Voila! You have a simple motor speed control, through the computer.
controlling from a Processing app
See the commented out Processing code at the end of Dimmer example.
- Computer -> Arduino
- Arduino -> Computer
Extra
Connecting to various external devices and components: http://www.arduino.cc/playground/Main/ComponentLib
