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Kod: Markera allt

#include <htc.h>
#include <pic16f877a.h>
#include <pic.h>

__CONFIG(FOSC_XT & WDTE_OFF & BOREN_OFF & LVP_OFF & CPD_OFF & 
DEBUG_OFF & CP_OFF);

#define _XTAL_FREQ 4000000 //4MHz
#define RS	RA0
#define EN	RA1


void startupint() {
PORTD = 0x00;
PORTB = 0x00;
ADCON1 = 0x06;  //Analog comparators off
CMCON = 0x07;
PORTA = 0x00;
PORTE = 0x00;
PORTC = 0x00;
TRISA = 0x00; //PORTA all output
TRISB = 0x00; //PORTB all output
TRISC = 0x00; //PORTC all output
TRISD = 0x00; //PORTD all output
TRISE = 0x00; //PORTE all output
}

void strobe_EN() {
EN = 1;
EN = 0;
}

void lcdinit() {
__delay_ms(1000);		// Wait for LCD to settle
RS=0;
EN=0;		
PORTB = 0x02;			// START FUNCTION SET
strobe_EN();			
//__delay_us(10);
strobe_EN();
PORTB = 0x0C;			// 2-Line mode, Display on
strobe_EN();			// END FUNCTION SET

__delay_us(80);			// WAIT FOR MORE THAN 39uS

PORTB = 0x00;			// START ON/OFF Control
strobe_EN();
PORTB = 0x0c;			// Display on
strobe_EN();
__delay_us(80);			// END ON/OFF Control

PORTB = 0x00;			// START DISPLAY CLEAR
strobe_EN();
PORTB = 0x01;
strobe_EN();
__delay_ms(4);			// END DISPLAY CLEAR

PORTB = 0x00;			// START ENTRY MODE SET
strobe_EN();
PORTB = 0x06;			// Increment mode, entire shift off
strobe_EN();
__delay_us(80);			// END ENTRY MODE SET

}

void main() {

startupint();
lcdinit();
//lcdclear();
//writelcd(0x30);
while(1) {
NOP();
}


}

Kod: Markera allt

strobe_EN() {
EN = 1;
__delay_us(1);
EN = 0;
__delay_us(1);
}

Kod: Markera allt

__delay_ms(100); // Vänta så att LCDn hinner starta okej
EN = 0;
RS = 0;
PORTB = 0x02;   // 0010
strobe_EN();
strobe_EN();     // PORTB = 0x02 två gånger
PORTB = 0x0C;  // 1100
strobe_EN();
__delay_us(80);  // Minst 39uS. Tar 80 för att vara säker?

PORTB = 0x00;
strobe_EN();
PORTB = 0x0F;   // 1111
strobe_EN();
__delay_us(80);

PORTB = 0x00;   // 0000
strobe_EN();
PORTB = 0x01;  // 0001
strobe_EN();
__delay_ms(5);  // Minst 1.53mS.

PORTB = 0x00;  // 0000
strobe_EN();
PORTB = 0x06;  // 0110
strobe_EN();

// Slut på initieringen.

Kod: Markera allt

/*	Första test till LCD-Program med PIC16f877a
	Typ: Winstar WH2004A
	Blå med vita bokstäver. Bakgrundsbeylst LED
	4-bit Mode
	'KS 0066' - Controller (Kompatibel med HD44780?)
	Pins på LCD
		1:	Ground, VSS
		2:	Supply voltage for logic, VDD
		3:	Contrast Adjustment - 10kOhm pot
		4:	RS -- RD0
		5:	R/W -- GND (Not used)
		6:	E -- RD1
		7:	DB0 (Not used)
		8:	DB1	(Not used)
		9:	DB2	(Not used)
		10:	DB3	(Not used)
		11:	DB4	-- RB0
		12:	DB5 -- RB1
		13:	DB6 -- RB2
		14:	DB7 -- RB3
		15:	Anode: +4.2v for LED (Backlight)
		16:	Cathode: Power Supply for B/L(-)

		En vanlig blå LED är kopplad till RD0 för att se om allt fungerar som det ska

*/

#include <htc.h>
#include <pic16f877a.h>
#include <pic.h>

__CONFIG(FOSC_HS & WDTE_OFF & BOREN_OFF         & LVP_OFF & CPD_OFF & DEBUG_OFF & CP_OFF);

#define _XTAL_FREQ 4000000 //4MHz
#define RS	RD0
#define EN	RD1
#define LED RA0


void startupmcu() {

		// Start with all ports shut off
	PORTA = 0x00;
	PORTB = 0x00;
	PORTC = 0x00;
	PORTD = 0x00;
	PORTE = 0x00;
						
	ADCON1 = 0x06;		// All ports digital I/O (RA0-5, RE0-2)
	CMCON = 0x07;		// Compatators OFF

	// Port Direction: 1=input, 0=output
	TRISA = 0x00;
	TRISB = 0x00;
	TRISC = 0x00;
	TRISD = 0x00;
	TRISE = 0x00;


}

void strobe_EN() {
__delay_us(1);
EN = 1;
__delay_us(1);
EN = 0;
__delay_us(1);
}

void write_strobe() {
__delay_us(1);
RS = 1;
EN = 1;
__delay_us(1);
EN = 0;
RS = 0;
__delay_us(1);
}

void lcdcmd(unsigned char Data) {
RS=0;
EN=0;


PORTB = ((Data >> 4) & 0x0F);
strobe_EN();
__delay_us(200);

PORTB = (Data & 0x0F);
strobe_EN();
__delay_us(200);

}
void writelcd(unsigned char Text) {

	PORTB = ((Text >> 4) & 0x0F);
	write_strobe();
	__delay_us(1);
	PORTB = (Text & 0x0F);
	write_strobe();
	__delay_ms(5);

}

void crshome() {

	lcdcmd(0x02);
	__delay_ms(5);
	}

void lcdclear() {
	RS = 0;
	lcdcmd(0x01);
	__delay_ms(3);

	}

void hd44780init() {
	__delay_ms(100);	// Wait for LCD to Settle
	PORTB = 0x03;		
	strobe_EN();
	__delay_ms(10);
	strobe_EN();
	__delay_us(200);
	strobe_EN();
	__delay_us(10);
	

	PORTB = 0x02;
	strobe_EN();
	__delay_us(200);

	lcdcmd(0x2A);	// Function set. 4-bits, 2 Lines, 5x8 dots.
	lcdcmd(0x0F);	// Display On/Off Control. Display on, Cursor on, Blinking cursor on.
	lcdcmd(0x01);	// Clear Display
	lcdcmd(0x06);	// Entry Mode Set. Cursor increment.

	__delay_ms(5);

}

void main() {

	startupmcu();
//	ksinit();
	hd44780init();
	crshome();
	writelcd(0x48);		// H
	writelcd(0x45);		// E
	writelcd(0x4A);		// J
	lcdcmd(0xC0);		// Select 2nd row
	writelcd(0x65);		// e
	writelcd(0x6C);		// l
	writelcd(0x65);		// e
	writelcd(0x6B);		// k
	writelcd(0x74);		// t
	writelcd(0x72);		// r
	writelcd(0x6F);		// o
	writelcd(0x6E);		// n
	writelcd(0x69);		// i
	writelcd(0x6B);		// k
	writelcd(0x66);		// f
	writelcd(0x6F);		// o
	writelcd(0x72);		// r
	writelcd(0x75);		// u
	writelcd(0x6D);		// m
	writelcd(0x65);		// e
	writelcd(0x74);		// t
	lcdcmd(0x94);		// Select 3rd row
	writelcd(0x2E);		// .
	writelcd(0x63);		// c
	writelcd(0x6F);		// o
	writelcd(0x6D);		// m

	while(1) {

		LED = 1;
		__delay_ms(500);
		LED = 0;
		__delay_ms(500);
}