I have tried this:
#include <Wire.h>
#include <hd44780.h> // main hd44780 header
#include <hd44780ioClass/hd44780_I2Cexp.h> // i2c expander i/o class header
hd44780_I2Cexp lcd; // declare lcd object: auto locate & config exapander chip
// LCD geometry
const int LCD_COLS = 16;
const int LCD_ROWS = 2;
#include <Keypad.h>
const byte ROWS = 4; //four rows
const byte COLS = 4; //three columns
char keys[ROWS][COLS] = {
{'1', '2', '3', 'A'},
{'4', '5', '6', 'B'},
{'7', '8', '9', 'C'},
{'*', '0', '#', 'D'}
};
byte rowPins[ROWS] = {6, 7, 8, 9}; //connect to the row pinouts of the keypad
byte colPins[COLS] = {5, 4, 12, 11}; //connect to the column pinouts of the keypad
Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );
bool a = true;
void setup()
{
lcd.begin(LCD_COLS, LCD_ROWS);
lcd.setCursor(3, 0);
lcd.print(" PRIYA");
lcd.setCursor(3, 1);
lcd.print("ELECTRONICS");
delay(100);
for (int positionCounter = 0; positionCounter < 40; positionCounter++)
{
lcd.scrollDisplayLeft();
delay(120);
}
delay(800);
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Set Count:");
}
//unsigned long total;
void loop()
{
const byte entryMaxSize = 5;
static char count[entryMaxSize + 1];
static byte x; // index
char key = keypad.getKey();
if (key != NO_KEY) // Check for a valid key.
{
switch (key)
{
case 'A':
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Set Count:");
x = 0; // reset the counter
a = true;
break;
case 'D':
if (a) {
if (x == 0)
{
invalidCount();
}
else {
lcd.clear();
lcd.print("Count Set:");
for (byte i = 0; i < x; i++) {
lcd.print(count[i]);
unsigned long val = atol(count);
a = false;
}
}
}
break;
default:
if (a)
{
// if not 5 characters yet
if (x < entryMaxSize)
{
// add key to userinput array and increment counter
if ( key >= '0' && key <= '9' ) // key is of type char and has a value between 0 and 9 so do something with it.
{
count[x++] = key;
count[x] = '\0';
lcd.print( key ) ; // new print statement <<<<<<<<<<<<<<<<
//total = ((count[ 0 ] - '0') * 10000UL + (count[ 1 ] - '0') * 1000 + (count[ 2 ] - '0') * 100 + (count[3] - '0') * 10 + (count[4] - '0'));
}
}
else {
countWarning();
}
}
break;
}
}
}
void invalidCount()
{
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Invalid Count!!");
lcd.setCursor(0, 1);
lcd.print("Press A"); // suggesting the user to enter the count again
a = false;
}
void countWarning()
{
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("5 Digits Only!!"); // warning for the user if more than permitted digits are entered
lcd.setCursor(0, 1);
lcd.print("Press A"); // suggesting the user to enter the count again
a = false;
}
I get compiler warning:
Compiling sketch...
"C:\Users\Umesh\AppData\Local\Arduino15\packages\arduino\tools\avr-gcc\4.9.2-atmel3.5.4-arduino2/bin/avr-g++" -c -g -Os -Wall -Wextra -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -MMD -flto -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10803 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\Users\Umesh\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.6.20\cores\arduino" "-IC:\Users\Umesh\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.6.20\variants\standard" "-IC:\Users\Umesh\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.6.20\libraries\Wire\src" "-IC:\Users\Umesh\Documents\Arduino\libraries\hd44780-master" "-IC:\Program Files (x86)\Arduino\libraries\Keypad" "C:\Users\Umesh\AppData\Local\Temp\arduino_build_537359\sketch\sketch_oct11a_experimental.ino.cpp" -o "C:\Users\Umesh\AppData\Local\Temp\arduino_build_537359\sketch\sketch_oct11a_experimental.ino.cpp.o"
C:\Users\Umesh\Documents\Arduino\sketch_oct11a_experimental\sketch_oct11a_experimental.ino: In function 'void loop()':
C:\Users\Umesh\Documents\Arduino\sketch_oct11a_experimental\sketch_oct11a_experimental.ino:78:29: warning: unused variable 'val' [-Wunused-variable]
unsigned long val = atol(count);
^
Archiving built core (caching) in: C:\Users\Umesh\AppData\Local\Temp\arduino_cache_237151\core\core_arduino_avr_uno_f58a689ef320964a3a2cb34b34fad8ac.a