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| #define LCD_RS 8
#define LCD_E 9
#define Data_Pin 4
#define Clk_Pin 5
//#define D6 6
//#define D7 7
void lcdwrite(int select, char data)
{
digitalWrite(Clk_Pin,LOW);
digitalWrite(LCD_RS, select); //Change RS for command/data
char LcdDataBus = (data >>4 ); //Send higher nibble
char Maask = 8, Flaag=0;
for (int t=0; t<7; t++)
{
Flaag = LcdDataBus & Maask;
if(Flaag==0)
digitalWrite(Data_Pin, LOW);
else
digitalWrite(Data_Pin, HIGH);
digitalWrite(Clk_Pin, HIGH);
delayMicroseconds(100);
digitalWrite(Clk_Pin,LOW);
Maask = Maask >> 1;
}
digitalWrite(LCD_E, HIGH);
delay(2);
digitalWrite(LCD_E, LOW);
delay(2);
LcdDataBus = (data & 0x0f ); //Lower nibble
Maask = 8, Flaag=0;
for (int t=0; t<7; t++)
{
Flaag = LcdDataBus & Maask;
if(Flaag==0)
digitalWrite(Data_Pin, LOW);
else
digitalWrite(Data_Pin, HIGH);
digitalWrite(Clk_Pin, HIGH);
delayMicroseconds(100);
digitalWrite(Clk_Pin,LOW);
Maask = Maask >> 1;
}
digitalWrite(LCD_E, HIGH);
delay(2);
digitalWrite(LCD_E, LOW);
delay(2);
}
void lcd_cmd(char cmd)
{
lcdwrite(0, cmd);
}
void lcd_data(char dat)
{
lcdwrite(1, dat);
}
void lcd_ini()
{
//Lcd_CmdWrite(0x02); // Initialize Lcd in 4-bit mode
// Lcd_CmdWrite(0x28); // enable 5x7 mode for chars
//Lcd_CmdWrite(0x0E); // Display OFF, Cursor ON
//Lcd_CmdWrite(0x01); // Clear Display
//Lcd_CmdWrite(0x80);
lcdwrite(0, 0x02);//lcdwrite(0, 0x33);
delay(15);
lcdwrite(0, 0x28);//lcdwrite(0, 0x32);
delay(15);
lcdwrite(0, 0x0E);//lcdwrite(0, 0x28);
delay(15);
lcdwrite(0, 0x01);
delay(15);
//lcdwrite(0, 0x0C);
//delay(15);
//lcdwrite(0, 0x06);
delay(15);
lcdwrite(0, 0x80);
delay(15);
}
void setup() {
// put your setup code here, to run once:
pinMode(4,OUTPUT);
pinMode(5,OUTPUT);
pinMode(6,OUTPUT);
pinMode(7,OUTPUT);
pinMode(8,OUTPUT);
pinMode(9,OUTPUT);
delay(150);
lcd_ini();
lcd_data('h');
lcd_data('e');
lcd_data('y');
//lcd_data(0x61);
//lcdwrite(1, 0x08);
}
void loop() {
// put your main code here, to run repeatedly:
}
The same logic functions for the DSPIC are given below,
void Lcd_CmdWrite(char cmd)
{
LCD_RS = 0; // Send LOW pulse on RS pin for selecting Command register
char LcdDataBus = (cmd >>4); //Send higher nibble
char Maask = 8, Flaag=0;
for (int t=0; t<7; t++)
{
Flaag = LcdDataBus & Maask;
if(Flaag==0)
Data_Pin = 0;
else
Data_Pin = 1;
Clk_Pin = 1;
__delay32(5500);
Clk_Pin = 0;
Maask = Maask >> 1;
}
//LCD_RW = 0; // Send LOW pulse on RW pin for Write operation
LCD_E = 1; // Generate a High-to-low pulse on EN pin
delay_ms(5);
LCD_E = 0;
delay_ms(5);
LcdDataBus = (cmd & 0x0f); //Send Lower nibble
LCD_RS = 0; // Send LOW pulse on RS pin for selecting Command register
//LCD_RW = 0; // Send LOW pulse on RW pin for Write operation
Maask = 8;
Flaag=0;
for (int t=0; t<7; t++)
{
Flaag = LcdDataBus & Maask;
if(Flaag==0)
Data_Pin = 0;
else
Data_Pin = 1;
Clk_Pin = 1;
__delay32(5500);
Clk_Pin = 0;
Maask = Maask >> 1;
}
LCD_E = 1; // Generate a High-to-low pulse on EN pin
delay_ms(5);
LCD_E = 0;
delay_ms(5);
}
void Lcd_DataWrite(char dat)
{
char LcdDataBus = (dat >> 4); //Send higher nibble
LCD_RS = 1; // Send HIGH pulse on RS pin for selecting data register
//LCD_RW = 0; // Send LOW pulse on RW pin for Write operation
char Maask = 8, Flaag=0;
for (int t=0; t<7; t++)
{
Flaag = LcdDataBus & Maask;
if(Flaag==0) Data_Pin = 0;
else Data_Pin = 1;
Clk_Pin = 1;
__delay32(5500);
Clk_Pin = 0;
Maask = Maask >> 1;
}
LCD_E = 1; // Generate a High-to-low pulse on EN pin
delay_ms(5);
LCD_E = 0;
delay_ms(5);
LcdDataBus = (dat & 0x0f); //Send Lower nibble
LCD_RS = 1; // Send HIGH pulse on RS pin for selecting data register
//LCD_RW = 0; // Send LOW pulse on RW pin for Write operation
Maask = 8;
Flaag=0;
for (int t=0; t<7; t++)
{
Flaag = LcdDataBus & Maask;
if(Flaag==0) Data_Pin = 0;
else Data_Pin = 1;
Clk_Pin = 1;
__delay32(5500);
Clk_Pin = 0;
Maask = Maask >> 1;
}
LCD_E = 1; // Generate a High-to-low pulse on EN pin
delay_ms(5);
LCD_E = 0;
delay_ms(5);
} |