mirror of https://github.com/noisymime/Arduino.git
119 lines
2.6 KiB
C++
119 lines
2.6 KiB
C++
/*
|
|
Arduino Starter Kit example
|
|
Project 11 - Crystal Ball
|
|
|
|
This sketch is written to accompany Project 11 in the
|
|
Arduino Starter Kit
|
|
|
|
Parts required:
|
|
220 ohm resistor
|
|
10 kilohm resistor
|
|
10 kilohm potentiometer
|
|
16x2 LCD screen
|
|
tilt switch
|
|
|
|
|
|
Created 13 September 2012
|
|
by Scott Fitzgerald
|
|
|
|
http://arduino.cc/starterKit
|
|
|
|
This example code is part of the public domain
|
|
*/
|
|
|
|
// include the library code:
|
|
#include <LiquidCrystal.h>
|
|
|
|
// initialize the library with the numbers of the interface pins
|
|
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
|
|
|
|
// set up a constant for the tilt switchPin
|
|
const int switchPin = 6;
|
|
|
|
// variable to hold the value of the switchPin
|
|
int switchState = 0;
|
|
|
|
// variable to hold previous value of the switchpin
|
|
int prevSwitchState = 0;
|
|
|
|
// a variable to choose which reply from the crystal ball
|
|
int reply;
|
|
|
|
void setup() {
|
|
// set up the number of columns and rows on the LCD
|
|
lcd.begin(16, 2);
|
|
|
|
// set up the switch pin as an input
|
|
pinMode(switchPin, INPUT);
|
|
|
|
// Print a message to the LCD.
|
|
lcd.print("Ask the");
|
|
// set the cursor to column 0, line 1
|
|
// line 1 is the second row, since counting begins with 0
|
|
lcd.setCursor(0, 1);
|
|
// print to the second line
|
|
lcd.print("Crystal Ball!");
|
|
}
|
|
|
|
void loop() {
|
|
// check the status of the switch
|
|
switchState = digitalRead(switchPin);
|
|
|
|
// compare the switchState to its previous state
|
|
if (switchState != prevSwitchState) {
|
|
// if the state has changed from HIGH to LOW
|
|
// you know that the ball has been tilted from
|
|
// one direction to the other
|
|
if (switchState == LOW) {
|
|
// randomly chose a reply
|
|
reply = random(8);
|
|
// clean up the screen before printing a new reply
|
|
lcd.clear();
|
|
// set the cursor to column 0, line 0
|
|
lcd.setCursor(0, 0);
|
|
// print some text
|
|
lcd.print("the ball says:");
|
|
// move the cursor to the second line
|
|
lcd.setCursor(0, 1);
|
|
|
|
// choose a saying to print baed on the value in reply
|
|
switch (reply) {
|
|
case 0:
|
|
lcd.print("Yes");
|
|
break;
|
|
|
|
case 1:
|
|
lcd.print("Most likely");
|
|
break;
|
|
|
|
case 2:
|
|
lcd.print("Certainly");
|
|
break;
|
|
|
|
case 3:
|
|
lcd.print("Outlook good");
|
|
break;
|
|
|
|
case 4:
|
|
lcd.print("Unsure");
|
|
break;
|
|
|
|
case 5:
|
|
lcd.print("Ask again");
|
|
break;
|
|
|
|
case 6:
|
|
lcd.print("Doubtful");
|
|
break;
|
|
|
|
case 7:
|
|
lcd.print("No");
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
// save the current switch state as the last state
|
|
prevSwitchState = switchState;
|
|
}
|
|
|