Friday, 9 August 2013
SavingsBox
#include <EEPROMEx.h>
#include <LiquidCrystal.h>
#include <Keypad.h>
// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(0, 1, 5, 4, 3, 13);
const byte ROWS = 4; // Four rows
const byte COLS = 3; // Three columns
// Define the Keymap
char keys[ROWS][COLS] = {
{'1','2','3'},
{'4','5','6'},
{'7','8','9'},
{'*','0','#'}
};
// Connect keypad ROW0, ROW1, ROW2 and ROW3 to these Arduino pins.
byte rowPins[ROWS] = { 9, 8, 7, 6 };
// Connect keypad COL0, COL1 and COL2 to these Arduino pins.
byte colPins[COLS] = { 12, 11, 10 };
// Create the Keypad
Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );
int i = 0;
float Total;
float Save = 0;
int value[4] = {0};
float pos[3] = {0};
int keypress = 0;
int address = 0;
int pbIn = 0;
void setup()
{
// set up the LCD's number of columns and rows:
lcd.begin(16, 2);
Total = EEPROM.readFloat(address);
lcd.setCursor(0,0);
lcd.print("Total amount");
lcd.setCursor(0,1);
lcd.print("saved is $");
lcd.print(Total);
delay(3000);
lcd.clear();
lcd.setCursor(0,0);
lcd.print("Enter new amount");
lcd.setCursor(0,1);
lcd.print("$");
attachInterrupt(pbIn, clearMemory, RISING);
}
void loop()
{
i = 0;
while (keypress <= 3)
{
char key = keypad.getKey();
if(key) // Check for a valid key.
{
switch (key)
{
case '#':
lcd.clear();
lcd.setCursor(0,0);
lcd.print("Enter new amount");
lcd.setCursor(0,1);
lcd.print("$");
i = 0; //returns to the first variable in array 'value'
keypress = 0;
break;
case '*':
if (keypress < 2)
{lcd.clear();
lcd.setCursor(0,0);
lcd.print("Enter 0 before ");
lcd.setCursor(0,1);
lcd.print("$1 to $9 ");
i = 0;
keypress = 0;
delay(2500);
lcd.clear();
lcd.setCursor(0,0);
lcd.print("Press '#' to ");
lcd.setCursor(0,1);
lcd.print("re-enter.");}
break;
default:
value[i] = key;
i ++;
lcd.print(key);
keypress ++;
if (keypress == 2)
{lcd.print(".");}
break;
}
}
delay(100);
}
lcd.setCursor(0,0);
lcd.print("Press * to save ");
lcd.setCursor(0,1);
lcd.print("or # to clear");
char key = keypad.getKey();
if(key) // Check for a valid key.
{
keypress = 0;
if (key == '#')
{lcd.clear();
lcd.setCursor(0,0);
lcd.print("Enter new amount");
lcd.setCursor(0,1);
lcd.print("$");}
else if (key == '*')
{
pos[0] = (value[0] - 48) * 10;
pos[1] = (value[1] - 48) * 1;
pos[2] = (value[2] - 48) * 0.10;
pos[3] = (value[3] - 48) * 0.01;
Save = pos[0] + pos[1] + pos[2] + pos[3];
Total = EEPROM.readFloat(address);
Total = Total + Save;
lcd.clear();
lcd.setCursor(0,0);
lcd.print("Saved $");
lcd.print(Save);
lcd.setCursor(0,1);
lcd.print("Total $");
lcd.print(Total);
delay(3000);
EEPROM.writeFloat(address,Total);
delay(500);
lcd.clear();
lcd.setCursor(0,0);
lcd.print("Saved. You may");
//lcd.print("Press any key to");
lcd.setCursor(0,1);
lcd.print("now power off");
}
}
}
void clearMemory()
{ EEPROM.writeFloat(address,0);
Total = EEPROM.readFloat(address);
lcd.clear();
lcd.setCursor(0,0);
lcd.print("Memory erased,");
lcd.setCursor(0,1);
lcd.print("Please power off ");
char key = keypad.waitForKey();
}
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