NHD-0420E2Z-FSW-GBW View Datasheet(PDF) - Unspecified

Part Name

Description

Manufacturer

NHD-0420E2Z-FSW-GBW

Character Liquid Crystal Display Module

Unspecified 

4-bit Initialization:

/**********************************************************/

void command(char i)

{

P1 = i;

//put data on output Port

D_I =0;

//D/I=LOW : send instruction

R_W =0;

//R/W=LOW : Write

Nybble();

//Send lower 4 bits

i = i<<4;

//Shift over by 4 bits

P1 = i;

//put data on output Port

Nybble();

//Send upper 4 bits

}

/**********************************************************/

void write(char i)

{

P1 = i;

//put data on output Port

D_I =1;

//D/I=HIGH : send data

R_W =0;

//R/W=LOW : Write

Nybble();

//Clock lower 4 bits

i = i<<4;

//Shift over by 4 bits

P1 = i;

//put data on output Port

Nybble();

//Clock upper 4 bits

}

/**********************************************************/

void Nybble()

{

E = 1;

Delay(1);

//enable pulse width >= 300ns

E = 0;

//Clock enable: falling edge

}

/**********************************************************/

void init()

{

P1 = 0;

P3 = 0;

Delay(100);

//Wait >15 msec after power is applied

P1 = 0x30;

//put 0x30 on the output port

Delay(30);

//must wait 5ms, busy flag not available

Nybble();

//command 0x30 = Wake up

Delay(10);

//must wait 160us, busy flag not available

Nybble();

//command 0x30 = Wake up #2

Delay(10);

//must wait 160us, busy flag not available

Nybble();

//command 0x30 = Wake up #3

Delay(10);

//can check busy flag now instead of delay

P1= 0x20;

//put 0x20 on the output port

Nybble();

//Function set: 4-bit interface

command(0x28);

//Function set: 4-bit/2-line

command(0x10);

//Set cursor

command(0x0F);

//Display ON; Blinking cursor

command(0x06);

//Entry Mode set

}

/**********************************************************/

[11]

Share Link: