Arduino and HD44780 LCD v1.0 snippet

/* LCD display with 4 DataPins
* --------
*
* This is a example in how to use an LCD screen
* configured with data transfers over 2 x 4 bits. The example
* based on the "LCD Hola example" by DojoDave.
*
* There are the following pins to be considered:
*
* - DI, RW, DB0..DB3, Enable (7 in total)
*
* the pinout for LCD displays is standard and there is plenty
* of documentation to be found on the internet.
*
* (cleft) 2006 Tomek for K3 and fh-potsdam
* (cleft) 2008 Carl - Modifications
*
*/
int led = 13;
int DI = 12;
int RW = 11;
int DB[] = { 7, 8, 9, 10};
int Enable = 6;
int count = 1;
int count1 = 1;
int count2 = 1;

void LcdCommandWrite(int value) {
int i = 0;
int value1 = 0;
value1 = value;

value1 >>= 4;               //send the first 4 databits (from  + RW and DI
for (i=DB[0]; i <= DI; i++) {
  digitalWrite(i,value1 & 01);
  value1 >>= 1;
}
digitalWrite(Enable,LOW);   // send a pulse to enable
delayMicroseconds(1);
digitalWrite(Enable,HIGH);
delayMicroseconds(1);
digitalWrite(Enable,LOW);
delayMicroseconds(1); //    pause 1 ms according to datasheet
delay(1);

for (i=DB[0]; i <= DB[3]; i++) {  // secound part of the secound 4 bits (from 
  digitalWrite(i,value & 01);
  value >>= 1;
}
value >>= 4;                 // send the RW and DI of the secound 4 bits(from 
for (i=RW; i <= DI; i++) {
  digitalWrite(i,value & 01);
  value >>= 1;
}
digitalWrite(Enable,LOW); // send a pulse to enable
delayMicroseconds(1);
digitalWrite(Enable,HIGH);
delayMicroseconds(1);
digitalWrite(Enable,LOW);
delayMicroseconds(1); // pause 1 ms according to datasheet
}

void LcdDataWrite(int value) {
int i = 0;
int value1 = 0;
digitalWrite(DI, HIGH);
digitalWrite(RW, LOW);
value1 =value;
value1 >>= 4;                     //send the first 4 databits (from 
for (i=DB[0]; i <= DB[3]; i++) {
  digitalWrite(i,value1 & 01);
  value1 >>= 1;
}
digitalWrite(Enable,LOW);   // send a pulse to enable
delayMicroseconds(1);
digitalWrite(Enable,HIGH);
delayMicroseconds(1);
digitalWrite(Enable,LOW);
delayMicroseconds(1);   // pause 1 ms according to datasheet
delay(1);
digitalWrite(DI, HIGH);
digitalWrite(RW, LOW);
for (i=DB[0]; i <= DB[3]; i++) {
  digitalWrite(i,value & 01);
  value >>= 1;
}
digitalWrite(Enable,LOW);   // send a pulse to enable
delayMicroseconds(1);
digitalWrite(Enable,HIGH);
delayMicroseconds(1);
digitalWrite(Enable,LOW);
delayMicroseconds(1); // pause 1 ms according to datasheet
}

// this funktion help us to write number over 9, easyely in the lcd display

void LcdNumberWrite(int nr) {

int n1 = 0;
int n2 = 0;

n1 = n2 = nr;

n1 = n1 / 100;
LcdCommandWrite(560 + n1);  //512 used to wirte data (see commands for character modul)
n2 = (n2 - n1 * 100) / 10;
LcdCommandWrite(560 + n2);  //512 used to wirte data (see commands for character modul)
nr = nr - n1 *100 - n2 * 10;
LcdCommandWrite(560 + nr);  //512 used to wirte data (see commands for character modul)
}

void LcdNumberWrite2digits(long N) {
long display1 = 0;
long display2 = 0;
long display3 = 0;
long display4 = 0;
long display1a = 0;
long display1b = 0;
long display1c = 0;
//display1 = display2 = display 3 = display4 = N;

/*
display1c = (N/1000000);
N = N - (display1c * 1000000);
LcdCommandWrite(560 + display1c); //512 used to wirte data

display1b = (N/100000);
N = N - (display1b * 100000);
LcdCommandWrite(560 + display1b); //512 used to wirte data

display1a = (N/10000);
N = N - (display1a * 10000);
LcdCommandWrite(560 + display1a); //512 used to wirte data

display1 = (N/1000);
N = N - (display1 * 1000);
LcdCommandWrite(560 + display1); //512 used to wirte data

display2 = (N/100);
N = N - (display2 * 100);
LcdCommandWrite(560 + display2); //512 used to wirte data
*/
display3 = (N/10);
N = N - (display3 * 10);
LcdCommandWrite(560 + display3); //512 used to wirte data

display4 = N;
LcdCommandWrite(560 + display4); //512 used to wirte data

}

void setup (void) {

int i = 0;
for (i=Enable; i <= DI; i++) {
pinMode(i,OUTPUT);
}
delay(100);
// initiatize lcd after a short pause
// needed by the LCDs controller

///////////////////////////////////////////////////// 4 pin initialization
LcdCommandWrite(0x03); // function set:
// 4 pin initialization
delay(64);
LcdCommandWrite(0x03); // function set:
// 4 pin initialization
delay(50);
LcdCommandWrite(0x03); // function set:
// 4 pin initialization
delay(50);
LcdCommandWrite(0x02); // function set:
// 4 pin initialization
delay(50);
LcdCommandWrite(0x2C); // function set:
// 4-bit interface, 1 display lines, 5x7 font
///////////////////////////////////////////////////// end of 4 pin initialization 

delay(20);
LcdCommandWrite(0x06); // entry mode set:
// increment automatically, no display shift
delay(20);
LcdCommandWrite(0x0E); // display control:
// turn display on, cursor on, no blinking
delay(20);
LcdCommandWrite(0x01); // clear display, set cursor position to zero
delay(100);

LcdCommandWrite(0x80); // display control:
delay(20);

//////// unter this line are the special stuff you don't need for a initialitzation

LcdCommandWrite(0x0F); //  cursor blink
delay(10);
}

void loop (void) {

//>>>>>>>>>>>>>>>>>>>>>>>>>>>possible commands for the Lcd Display>>>>>>><< able to use for LcdDisplays with 4 or with 8 DataPins

//LcdCommandWrite(0x01); // clear display, set the cursor to home position
//LcdCommandWrite(0x02); // set cursor position to zero
//LcdCommandWrite(0x0A); // set the display off
//LcdCommandWrite(0x0E); // set the display on and with out cursor blink
//LcdCommandWrite(0x0F); // set the display on and  with cursor blink
//LcdCommandWrite(0x0F); //  cursor blink
LcdCommandWrite(0x0E); //  cursor not blink
//LcdCommandWrite(0x18); // shift display and cursor to the left
//LcdCommandWrite(0x1c); // shift display and cursor to the right
//LcdCommandWrite(0x14); // shift cursor to the right
//LcdCommandWrite(0x10); // shift cursor to the left

//>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> example <<<<<<<<<

LcdCommandWrite(0x02); // set cursor position to zero
delay(10);
/*
for ( count = 1; count<=10; count++) {
LcdNumberWrite2digits(count);
}
for ( count = 1; count<=10; count++) {
LcdNumberWrite2digits(count);
}
for ( count = 1; count<=10; count++) {
LcdNumberWrite2digits(count);
}
for ( count = 1; count<=10; count++) {
LcdNumberWrite2digits(count);
}
for ( count = 1; count<=3; count++) {
  int wrote [] = { 'o', 'n', 'e'};
  LcdDataWrite(wrote[count]);
}
for ( count = 1; count<=16; count++) {
  LcdDataWrite(' ');
}

for ( count1 = 1; count1<=3; count1++) {
  int wrote1 [] = { 't', 'w', 'o' , };
  LcdDataWrite(wrote1[count1]);
}
for ( count = 1; count<=16; count++) {
  LcdDataWrite(' ');
}
for ( count2 = 1; count2<=5; count2++) {
  int wrote2 [] = { 't', 'h', 'r','e','e',};
  LcdDataWrite(wrote2[count2]);
}
for ( count = 1; count<=16; count++) {
  LcdDataWrite(' ');
}
for ( count = 1; count<=4; count++) {
  int wrote [] = { 'f', 'o', 'u','r'};
  LcdDataWrite(wrote[count]);
}
for ( count = 1; count<=16; count++) {
  LcdDataWrite(' ');
}
LcdDataWrite('o')
n
e
');
LcdDataWrite('two                 ');
LcdDataWrite('three               ');
LcdDataWrite('four                ');
for ( count = 1; count<=20; count++) {
LcdDataWrite(' ');
}

for ( count = 1; count<=10; count++) {
LcdNumberWrite2digits(count);
}
LcdDataWrite('w');
LcdDataWrite('i');
LcdDataWrite('t');
LcdDataWrite('h');
LcdDataWrite(' ');

// and Number over 9 easyely like this
LcdDataWrite('4');

LcdDataWrite('P');
LcdDataWrite('i');
LcdDataWrite('n');
LcdDataWrite('s');

*/
for ( count = 0; count<=2; count++) {
  int wrote [] = { 'O', 'n', 'e',};
  LcdDataWrite(wrote[count]);
}
for ( count = 0; count<=16; count++) {
  LcdDataWrite(' ');
}
for ( count = 0; count<=2; count++) {
  int wrote [] = { 'T','w','o',};
LcdDataWrite(wrote[count]);
}
for ( count = 0; count<=16; count++) {
  LcdDataWrite(' ');
}
for ( count = 0; count<=4; count++) {
  int wrote [] = { 'T','h','r','e','e',};
LcdDataWrite(wrote[count]);
}
for ( count = 0; count<=14; count++) {
  LcdDataWrite(' ');
}
for ( count = 0; count<=3; count++) {
  int wrote [] = { 'F','o','u','r',};
LcdDataWrite(wrote[count]);
} 

delay(1000);
}