When I turn off the LED, only the black box is visible and as far as I know character should be displayed on LCD.
Continue to Site
There are three LCD pins vss, vcc and vee. Which pin is V0 pin?
I'm newbie I don't have much experience in electronics field Your question is not clear for me. Generally VO means output voltage for me. I did not understand on which pin you want to check voltage
Wrong!
But now I am getting data in LCD I don't know what the problem was but I guess there could be a cable fault
Just one problem fixed. Now I know that my hardware is working correctly. Now I want to test code which I have written myself.
Now first I have to fix the LCD initlization function for 4 bit mode. I'm just trying to fix this function
Already You are on my ignor list in ACC because of your behaviour. You don't respect forum members. You are the one who is trying to spoil someone's image. This is the second time you are talking nonsense. I have warned you even before this.
#define _XTAL_FREQ 8000000
#include <xc.h>
// PIC18F45K80 Configuration Bit Settings
// 'C' source line config statements
// CONFIG1L
#pragma config RETEN = OFF // VREG Sleep Enable bit (Ultra low-power regulator is Disabled (Controlled by REGSLP bit))
#pragma config INTOSCSEL = HIGH // LF-INTOSC Low-power Enable bit (LF-INTOSC in High-power mode during Sleep)
#pragma config SOSCSEL = HIGH // SOSC Power Selection and mode Configuration bits (High Power SOSC circuit selected)
#pragma config XINST = OFF // Extended Instruction Set (Enabled)
// CONFIG1H
#pragma config FOSC = INTIO2 // Oscillator (Internal RC oscillator)
#pragma config PLLCFG = OFF // PLL x4 Enable bit (Disabled)
#pragma config FCMEN = OFF // Fail-Safe Clock Monitor (Disabled)
#pragma config IESO = OFF // Internal External Oscillator Switch Over Mode (Disabled)
// CONFIG2L
#pragma config PWRTEN = OFF // Power Up Timer (Disabled)
#pragma config BOREN = SBORDIS // Brown Out Detect (Enabled in hardware, SBOREN disabled)
#pragma config BORV = 3 // Brown-out Reset Voltage bits (1.8V)
#pragma config BORPWR = ZPBORMV // BORMV Power level (ZPBORMV instead of BORMV is selected)
// CONFIG2H
#pragma config WDTEN = OFF // Watchdog Timer (WDT disabled in hardware; SWDTEN bit disabled)
#pragma config WDTPS = 1048576 // Watchdog Postscaler (1:1048576)
// CONFIG3H
#pragma config CANMX = PORTB // ECAN Mux bit (ECAN TX and RX pins are located on RB2 and RB3, respectively)
#pragma config MSSPMSK = MSK7 // MSSP address masking (7 Bit address masking mode)
#pragma config MCLRE = ON // Master Clear Enable (MCLR Enabled, RE3 Disabled)
// CONFIG4L
#pragma config STVREN = ON // Stack Overflow Reset (Enabled)
#pragma config BBSIZ = BB2K // Boot Block Size (2K word Boot Block size)
// CONFIG5L
#pragma config CP0 = OFF // Code Protect 00800-01FFF (Disabled)
#pragma config CP1 = OFF // Code Protect 02000-03FFF (Disabled)
#pragma config CP2 = OFF // Code Protect 04000-05FFF (Disabled)
#pragma config CP3 = OFF // Code Protect 06000-07FFF (Disabled)
// CONFIG5H
#pragma config CPB = OFF // Code Protect Boot (Disabled)
#pragma config CPD = OFF // Data EE Read Protect (Disabled)
// CONFIG6L
#pragma config WRT0 = OFF // Table Write Protect 00800-01FFF (Disabled)
#pragma config WRT1 = OFF // Table Write Protect 02000-03FFF (Disabled)
#pragma config WRT2 = OFF // Table Write Protect 04000-05FFF (Disabled)
#pragma config WRT3 = OFF // Table Write Protect 06000-07FFF (Disabled)
// CONFIG6H
#pragma config WRTC = OFF // Config. Write Protect (Disabled)
#pragma config WRTB = OFF // Table Write Protect Boot (Disabled)
#pragma config WRTD = OFF // Data EE Write Protect (Disabled)
// CONFIG7L
#pragma config EBTR0 = OFF // Table Read Protect 00800-01FFF (Disabled)
#pragma config EBTR1 = OFF // Table Read Protect 02000-03FFF (Disabled)
#pragma config EBTR2 = OFF // Table Read Protect 04000-05FFF (Disabled)
#pragma config EBTR3 = OFF // Table Read Protect 06000-07FFF (Disabled)
// CONFIG7H
#pragma config EBTRB = OFF // Table Read Protect Boot (Disabled)
#define RS LATCbits.LATC4
#define RW LATCbits.LATC5
#define EN LATCbits.LATC6
#define LCD_Port LATD
void Port_pins_Initialized (void)
{
LATA = LATB = LATC = LATD = LATE = 0;
TRISA = 0b0000000;// all are output, Unused
TRISB = 0b0000000;// all are output, Unused
TRISC = 0b0000000;// RS RW EN
TRISD = 0b0000000;// LCD
TRISE = 0b0000000;// All are output, Unused
ANCON0 = 0; // digital port
ANCON1 = 0; // digital port
CM1CON = 0; // Comparator off
CM2CON = 0; // Comparator off
ADCON0 = 0; // A/D conversion Disabled
}
void LCD_E_Pulse(void)
{
EN = 1;
__delay_us(4);
EN = 0;
__delay_us(4);
}
void LCD_WriteCmd(unsigned char data)
{
RS = 0; RW = 0;
LCD_Port = data & 0xF0 ; // send upper nibble
LCD_E_Pulse();
}
void LCD_WriteData(unsigned char data)
{
RS = 1; RW = 0;
LCD_Port = data & 0xF0 ; // send upper nibble
LCD_E_Pulse();
__delay_ms(20);
LCD_Port = (data << 4 ) & 0xF0 ; // send lower nibble
LCD_E_Pulse();
}
void buffer( unsigned char *p)
{
while (*p != '\0')
{
LCD_WriteData(*p);
p++;
}
}
void LCD_Init(void)
{
__delay_ms(15);
LCD_WriteCmd(0x30);
__delay_ms(5);
LCD_WriteCmd(0x30);
__delay_us(40);
LCD_WriteCmd(0x30);
__delay_us(40);
LCD_WriteCmd(0x20);
__delay_us(40);
LCD_WriteCmd(0x20);
__delay_us(40);
LCD_WriteCmd(0x20);
__delay_us(40);
LCD_WriteCmd(0x00);
__delay_us(40);
LCD_WriteCmd(0x80);
__delay_us(40);
LCD_WriteCmd(0x00);
__delay_us(40);
LCD_WriteCmd(0x10);
__delay_us(40);
LCD_WriteCmd(0x00);
__delay_us(40);
LCD_WriteCmd(0x70);
__delay_us(40);
}
void main ()
{
unsigned int i = 0;
unsigned char Data1 [20]="Hello World";
Port_pins_Initialized();
LCD_Init();
buffer(Data1);
while (1)
{
}
}
