You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
65 lines
1.7 KiB
Plaintext
65 lines
1.7 KiB
Plaintext
/*
|
|
Switch statement with serial input
|
|
|
|
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, open the Serial monitor and send any character.
|
|
The characters a, b, c, d, and e, will turn on LEDs. Any other character will turn
|
|
the LEDs off.
|
|
|
|
The circuit:
|
|
* 5 LEDs attached to digital pins 2 through 6 through 220-ohm resistors
|
|
|
|
created 1 Jul 2009
|
|
by Tom Igoe
|
|
|
|
http://www.arduino.cc/en/Tutorial/SwitchCase2
|
|
*/
|
|
|
|
void setup() {
|
|
// initialize serial communication:
|
|
Serial.begin(9600);
|
|
// initialize the LED pins:
|
|
for (int thisPin = 2; thisPin < 7; thisPin++) {
|
|
pinMode(thisPin, OUTPUT);
|
|
}
|
|
}
|
|
|
|
void loop() {
|
|
// read the sensor:
|
|
if (Serial.available() > 0) {
|
|
int inByte = Serial.read();
|
|
// do something different depending on the character received.
|
|
// The switch statement expects single number values for each case;
|
|
// in this exmaple, though, you're using single quotes to tell
|
|
// the controller to get the ASCII value for the character. For
|
|
// example 'a' = 97, 'b' = 98, and so forth:
|
|
|
|
switch (inByte) {
|
|
case 'a':
|
|
digitalWrite(2, HIGH);
|
|
break;
|
|
case 'b':
|
|
digitalWrite(3, HIGH);
|
|
break;
|
|
case 'c':
|
|
digitalWrite(4, HIGH);
|
|
break;
|
|
case 'd':
|
|
digitalWrite(5, HIGH);
|
|
break;
|
|
case 'e':
|
|
digitalWrite(6, HIGH);
|
|
break;
|
|
default:
|
|
// turn all the LEDs off:
|
|
for (int thisPin = 2; thisPin < 7; thisPin++) {
|
|
digitalWrite(thisPin, LOW);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|