Hi. I have been trying for several days to: make the up button on my LCD shield "count up". The only thing I have been able to do is it will add a+b to my "slipA" but I haven't found the way to have the "slipA" value increase by 0.01 by pushing the up button. I have tried "case 1, case 2, etc, but I get a error message "duplicate case".
Any suggestions would be greatly appreciated.
The program Im using is:
#include <LiquidCrystal.h>
// select the pins used on the LCD panel
LiquidCrystal lcd(8, 9, 4, 5, 6, 7);
// define some values used by the panel and buttons
float a=1.00,b=0.01;
float slipA=a+b;
int lcd_key = 0;
int adc_key_in = 0;
#define btnRIGHT 0
#define btnUP 1
#define btnDOWN 2
#define btnLEFT 3
#define btnSELECT 4
#define btnNONE 5
// read the buttons
int read_LCD_buttons()
{
adc_key_in = analogRead(0); // read the value from the sensor
// my buttons when read are centered at these valies: 0, 144, 329, 504, 741
// we add approx 50 to those values and check to see if we are close
if (adc_key_in > 1000) return btnNONE; // We make this the 1st option for speed reasons since it will be the most likely result
// For V1.1 us this threshold
if (adc_key_in < 50) return btnRIGHT;
if (adc_key_in < 250) return btnUP;
if (adc_key_in < 450) return btnDOWN;
if (adc_key_in < 650) return btnLEFT;
if (adc_key_in < 850) return btnSELECT;
return btnNONE; // when all others fail, return this...
}
void setup()
{
lcd.begin(16, 2); // start the library
lcd.setCursor(0,0);
lcd.print("Working on page"); // print a simple message
}
void loop()
{
float slipA=1.00;
lcd.setCursor(9,1); // move cursor to second line "1" and 9 spaces over
lcd.setCursor(5,1); // move to the begining of the second line
lcd_key = read_LCD_buttons(); // read the buttons
switch (lcd_key) // depending on which button was pushed, we perform an action
{
case btnSELECT:
{
lcd.print(slipA);
break;
}
case btnUP:
{
lcd.print(slipA+0.01);
break;}
}
}