PIC 18F4520 interfaced with 16x2 Display modules

[scorrpeio]

Hello,

I have connected 16x2 LCD module to PIC18F4520.

Pin configuration->
EN - RA1
RW- RA2
RS - RA3

D4-D7 - RD4-RD7

I have written this code...

void InitialiseDisplay(void)
{
	
	ResetDisplay();
	SendCommandToLCD(0x28);		//4 bit interface 2 line First Initialise
	Delay(1);
	SendCommandToLCD(0x0C);		//Display cursor off
	Delay(1);
	SendCommandToLCD(0x06);		//Entry Mode
	Delay(1);
	SendCommandToLCD(0x0F);
	Delay(1);
}

void ResetDisplay( void )
{
	Delay(10);
	TRISA = 0x00;	//Set RA1 - RA3 as o/p 
	TRISD = 0x00;	//Set port D as o/p 
	Delay(1);
	
	PIN_ENABLE_LCD = 0;	
	PIN_RW_LCD     = 0;
 	PIN_RS_LCD     = 0;

	//SendCommandToLCD(0x02);		
	SendCommandToLCD(0x03);		//First Initialise
	Delay(10);
	SendCommandToLCD(0x03);		//Second Initialise
	Delay(1);
	SendCommandToLCD(0x03);		//Third Initialise
	Delay(1);
	SendCommandToLCD(0x02);		
	Delay(1);

}

void SendCommandToLCD( unsigned int uiCommand )
{
	DATA_LCD = uiCommand >> 4;  //Send MSB nibble
	PIN_ENABLE_LCD = 1;	
	//Delay(15);
	PIN_ENABLE_LCD = 0;	

	DATA_LCD = uiCommand & 0x0F; //Send LSB nibble
	PIN_ENABLE_LCD = 1;	
	//Delay(15);
	PIN_ENABLE_LCD = 0;	

	Delay(1);
}

void SendDataToLCD	( unsigned int uiData )
{
	DATA_LCD = uiData >> 4;  //Send MSB nibble
	PIN_RS_LCD     = 1;	
	PIN_ENABLE_LCD = 1;
	PIN_ENABLE_LCD = 0;
	PIN_RS_LCD     = 0;		

	DATA_LCD = uiData & 0x0F; //Send LSB nibble
	PIN_RS_LCD     = 1;	
	PIN_ENABLE_LCD = 1;
	PIN_ENABLE_LCD = 0;
	PIN_RS_LCD     = 0;	

	Delay(1);

}

void Delay			( unsigned int uiIndex1 )
{
	unsigned int uiIndex;
	for( uiIndex = 1000; uiIndex > 0; uiIndex-- )
	{
		
		for( ; uiIndex1 > 0;  uiIndex1-- )
		{
				//do nothing
		}
			
	}
	
}

I took this link as reference...

LCD Commands and Instructions: LCD Tutorial for interfacing with Microcontrollers : 8051 Microcontroller Projects AVR PIC Projects Tutorials Ebooks Libraries codes

However, when I see output on screen, the 4-5 vertical lines blink 2 times and then nothing happens.

As per the code, i should get the blinking cursor. This is my first time to program LCD, so no idea if I am doing rite or wrong.

Can you please tell me, where did I do mistake?

 

[ESHINEDISPLAY]

void lcd_init(void)
{
P0=0;
LCDE="1";
delay_ms(500);
lcd_clear();
lcd_write_cmd(0x38);//www.e-shinedisplay.com
lcd_write_cmd(0x0f);//显示开关控制：显示ON,光标ON,闪烁ON
lcd_write_cmd(0x06);//光标输入方式增量移位
lcd_write_cmd(0x80);
//lcd_write_cmd(0x0c);
//lcd_clear();
}

 

[scorrpeio]

thnx for reply...
but the code you sent, is already implemented.

 

[scorrpeio]

can anybody reply please??

 

[cubanflyer]

I do not use 'C', so this is just an idea.The first thing I noticed in the send command function, there is no delay between the upper and lower nibble. ( or checking of R/W line if you use that), this is also the same in the send data function.


I do not know if this will help **broken link removed**

 

[scorrpeio]

I have tried most of the things I got on google...
but the problem persists.
Anybody have got such problem before?