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Code Issues Releases Activity

Added new switch case example

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This commit is contained in:
Tom Igoe 2009-07-01 17:30:39 +00:00
parent c8ae5d9d20
commit 674f4b1c97
6 changed files with 224 additions and 0 deletions
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build/shared/dist/examples/Control/switchCase/applet/core.a vendored Normal file
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#include "WProgram.h"
void setup();
void loop();
void setup() {
Serial.begin(9600);
}
void loop() {
int distance = analogRead(0);
int range = map(distance, 0, 600, 0, 3);
switch (range) {
case 0:
Serial.println("dark");
break;
case 1:
Serial.println("dim");
break;
case 2:
Serial.println("medium");
break;
case 3:
Serial.println("bright");
break;
}
}
int main(void)
{
init();
setup();
for (;;)
loop();
return 0;
}

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/*
Switch statement
Demonstrates the use of a switch statement. The switch
statement allows you to choose from among a set of discrete values
of a variable. It's like a series of if statements.
To see this sketch in action, but the board and sensor in a well-lit
room, open the serial monitor, and and move your hand gradually
down over the sensor.
The circuit:
* photoresistor from analog in 0 to +5V
* 10K resistor from analog in 0 to ground
created 1 Jul 2009
by Tom Igoe
http://www.arduino.cc/en/Tutorial/Loop
*/
// these constants won't change:
const int sensorMin = 0; // sensor minimum, discovered through experiment
const int sensorMax = 600; // sensor maximum, discovered through experiment
void setup() {
// initialize serial communication:
Serial.begin(9600);
}
void loop() {
// read the sensor:
int sensorReading = analogRead(0);
// map the sensor range to a range of four options:
int range = map(sensorReading, sensorMin, sensorMax, 0, 3);
// do something different depending on the
// range value:
switch (range) {
case 0: // your hand is on the sensor
Serial.println("dark");
break;
case 1: // your hand is close to the sensor
Serial.println("dim");
break;
case 2: // your hand is a few inches from the sensor
Serial.println("medium");
break;
case 3: // your hand is nowhere near the sensor
Serial.println("bright");
break;
}
}