Keyestudio ARDUINO maker learning kit Manual page 126

void LcdDataWrite(int value) {
// initialize all pins
int i = 0;
digitalWrite(DI, HIGH);
digitalWrite(RW, LOW);
for (i=DB[0]; i <= DB[7]; i++) {
digitalWrite(i,value & 01);
value >>= 1;
}
digitalWrite(Enable,LOW);
delayMicroseconds(1);
digitalWrite(Enable,HIGH);
delayMicroseconds(1);
digitalWrite(Enable,LOW);
delayMicroseconds(1); // wait for 1ms
}
void setup (void) {
int i = 0;
for (i=Enable; i <= DI; i++) {
pinMode(i,OUTPUT);
}
delay(100);
// initialize LCD after a brief pause
// for LCD control
LcdCommandWrite(0x38); // select as 8-bit interface, 2-line display, 5x7 character size
delay(64);
LcdCommandWrite(0x38); // select as 8-bit interface, 2-line display, 5x7 character size
delay(50);
LcdCommandWrite(0x38); // select as 8-bit interface, 2-line display, 5x7 character size
delay(20);
LcdCommandWrite(0x06); // set input mode
// auto-increment, no display of shifting
delay(20);
LcdCommandWrite(0x0E); // display setup
// turn on the monitor, cursor on, no flickering
delay(20);
LcdCommandWrite(0x01); // clear the scree, cursor position returns to 0
delay(100);
LcdCommandWrite(0x80); // display setup
// turn on the monitor, cursor on, no flickering
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124