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EasyPic2 + PIC 16f877A+LCD

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common792

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Hi Everyone,

I am working on a development board called easypic2. I have to drive a LCD(160x128).
I am new in programming, My tutor gave my a code which displays few colours one at a time(red,green etc...).

He just wants me to write "Hello word" instead of all these colours.
Here is the code,cold give me an hand please?

Code: 
//PORT DECLARATIONS
#define RS PORTB.F1
#define CS PORTB.F4
#define RW PORTB.F2
#define RST PORTB.F3
#define RD PORTB.F5
//-----------------------------------------------------------------------------

//------------------------------------------------------------------------------
//WRITE SEQUENCE
void write_1command(unsigned char command)
{
     PORTD = 0x00;
     RS = 0;

     CS = 0;
     RW = 0;
     PORTD = command;
     RW = 1;
     CS = 1;
     RS = 1;
}
void write_data(unsigned char data)
{
     PORTD = 0x00;
     CS = 0;
     RW = 0;
     PORTD = data;
     RW = 1;
     CS = 1;
}
void write_2command(unsigned char comm1,unsigned char comm2)
{
     write_1command(comm1);
     write_data(comm2);
}

void write_data_RGB(unsigned char Rdata,unsigned char Gdata,unsigned char Bdata)
{
     PORTD = 0x00;

     CS = 0;
     RW = 0;
     PORTD = Rdata;
     RW = 1;
     CS = 1;
     PORTD = 0x00;
     CS = 0;
     RW = 0;
     PORTD = Gdata;
     RW = 1;
     CS = 1;
     PORTD = 0x00;

     CS = 0;
     RW = 0;
     PORTD = Bdata;
     RW = 1;
     CS = 1;
}

//SHOW REGULAR PATTERN
void Fill_RAM(unsigned char Data1,unsigned char Data2,unsigned char Data3)
{
unsigned char i,j;

	for(i=0;i<128;i++)
	{
		for(j=0;j<160;j++)
		{

			Write_data_RGB(Data1,Data2,Data3);
		}
	}
}
//Setting start point of RAM
void Set_RAMSTART(unsigned char a, unsigned char b)
{
	Write_1Command(0x20);			// Display RAM X Starting Address
	Write_1Command(a);			//   Default => 0x00
	Write_1Command(0x21);			// Display RAM Y Starting Address
	Write_1Command(b);			//   Default => 0x00
}


//-------------------------------------------------------------------------------
//  Show Regular Pattern (Partial or Full Screen)
//
//    a: Start X Address
//    b: Start Y Address
//    c: Total Columns Devided by 2
//    d: Total Rows
void Fill_Block(unsigned char Data1, unsigned char Data2, unsigned char Data3, unsigned char a, unsigned char b, unsigned char c, unsigned char d)
{
unsigned char i,j;

	for(i=b;i<(b+d);i++)
	{
		for(j=0;j<c;j++)
		{
			Set_RAMSTART(a+j,i);
                        write_1command(0x22);
			Write_data_RGB(Data1,Data2,Data3);
		}
	}
}

//SHOW CHECKERBOARD PATTERN
void Checkerboard(unsigned char colour1R,unsigned char colour1G,unsigned char colour1B,
unsigned char colour2R,unsigned char colour2G,unsigned char colour2B)
{
unsigned char i,j,k,l;
         for(j=0;j<8;j++)
         {
         for(k=0;k<8;k++)
         {
         for(i=0;i<10;i++)
         {
               for(l=0;l<8;l++)
               {
               Write_data_RGB(colour1R,colour1G,colour1B);
               }
               for(l=0;l<8;l++)
               {
               Write_data_RGB(colour2R,colour2G,colour2B);
               }
        }
        }

        for(k=0;k<8;k++)
        {
        for(i=0;i<10;i++)
         {
               for(l=0;l<8;l++)
               {
               Write_data_RGB(colour2R,colour2G,colour2B);
               }

               for(l=0;l<8;l++)
               {
               Write_data_RGB(colour1R,colour1G,colour1B);
               }
        }
        }

        }
}

//MAIN PROGRAM
void main()
{
     ADCON1 = 0x07;
     TRISA = 0x00;
     PORTA = 0x00;
     TRISC = 0xFF;
     PORTC = 0x00;
     PORTB = 0x00;
     TRISD = 0x00;
     TRISB = 0x00;

     //------------------------------------------------------------------------
     //wait for button press on PORTC 0
     while(PORTC.F0 == 0)
     {
     Portd = 0x00;
     delay_ms(10);
     }
     //-------------------------------------------------------------------------
     //INITIAL STARTUP
     RD = 1;
     RS = 0;
     CS = 0;
     RW = 0;
     RST = 0;
     delay_ms(100);
     RST = 1;

     write_2command(0x06,0x00);    //Set Display On_Off (display off)
     write_2command(0x05,0x00);    //Set SOFT_RST (normal mode)
     write_2command(0x04,0x03);    //Set REDUCE_CURRENT (disp off analog RST)
     delay_ms(10);
     write_2command(0x04,0x00);    //(disp off, normal)
     delay_ms(10);
     write_2command(0x3B,0x00);
     write_2command(0x02,0x41);    //Set OSC_CTL (internal OSC on)
     write_2command(0x03,0x30);    //Set CLOCK_DIV (OSC clock 1)

     write_2command(0x08,0x01);    //Set PRECHARGE_TIME_R (1 CLK)
     write_2command(0x09,0x02);    //Set PRECHARGE_TIME_G (1 CLK)
     write_2command(0x0A,0x01);    //Set PRECHARGE_TIME_B (1 CLK)

     write_2command(0x0B,0x0A);    //Set PRECHARGE_CURRENT_R
     write_2command(0x0C,0x0A);    //Set PRECHARGE_CURRENT_G
     write_2command(0x0D,0x0A);    //Set PRECHARGE_CURRENT_B

     write_2command(0x10,0x46);    //Set DRIVING_CURRENT_R
     write_2command(0x11,0x38);    //Set DRIVING_CURRENT_G
     write_2command(0x12,0x3A);    //Set DRIVING_CURRENT_B

     write_2command(0x13,0x00);    //Set DISPLAY_MODE_SET (normal)
     write_2command(0x14,0x31);    //Set RGB_IF (MPU mode)
     write_2command(0x28,0x2F);    //Set DUTY
     write_2command(0x29,0x00);    //Set DSL

     write_2command(0x16,0x76);    //Set MEMORY_WRITE_MODE (Triple 6-bit mode)
     delay_ms(10);
     write_2command(0x3B,0x00);

     write_2command(0x80,0x00);    //Set IREF (controlled by external resistor)


     //write_2command(0x15,0x00);    //Set RGB_POL

     write_2command(0x17,0x00);    //Set MX1_ADDR
     write_2command(0x18,0x9F);    //Set MX2_ADDR
     write_2command(0x19,0x00);    //Set MY1_ADDR
     write_2command(0x1A,0x7F);    //Set MY2_ADDR
     write_2command(0x20,0x00);    //Set MEMORY_ACCESS_POINTER X
     write_2command(0x21,0x00);    //Set MEMORY_ACCESS_POINTER Y

     write_2command(0x2E,0x00);    //Set D1_DDRAM_FAC
     write_2command(0x2F,0x00);    //Set D1_DDRAM_FAR
     write_2command(0x31,0x00);    //Set D1_DDRAM_SAC
     write_2command(0x32,0x00);    //Set D1_DDRAM_SAR
     write_2command(0x33,0x00);    //Set SCR1_FX1 (0)
     write_2command(0x34,0x9F);    //Set SCR1_FX2 (159)
     write_2command(0x35,0x00);    //Set SCR1_FY1 (0)
     write_2command(0x36,0x7F);    //Set SCR1_FY2 (127)


     delay_ms(100);
     write_2command(0x06,0x01);    //Set DISP_ON_OFF (Display on)

     write_1command(0x22);         //Access Data Ram port

     while(1)
     {


     /*Fill_RAM(0x00,0x00,0x00);

     Fill_Block(0x00,0x00,0xFC,10,10,20,20);
     delay_ms(3000);*/

     Fill_RAM(0x00,0x00,0xFC);     //Fill screen with blue
     delay_ms(5000);

     Fill_RAM(0xFC,0x00,0x00);     //Fill screen with red
     delay_ms(5000);

     Fill_RAM(0x00,0xFC,0x00);     //Fill screen with green
     delay_ms(5000);

     Fill_RAM(0xFC,0xFC,0xFC);     //Fill screen with white
     delay_ms(5000);

     Checkerboard(0x00,0xFC,0x00,0x60,0x00,0xFC);   //show checkerboard
     delay_ms(10000);
     }


}


And Here is MY code.

#define ldata PORTD
#define RS PORTB.F1
#define CS PORTB.F4
#define RW PORTB.F2
#define RST PORTB.F3
#define RD PORTB.F5


void lcdcmd(unsigned char );
void lcddata(unsigned char );
void msdelay(unsigned char);
void write_2command(unsigned char);
 char value1='A';

void write_2command(unsigned char one, unsigned char two)
{
   lcdcmd(one);
   lcddata(two);
}
   
void main(void)
{
     ADCON1 = 0x07;
     TRISA = 0x00;
     PORTA = 0x00;
     TRISC = 0xFF;
     PORTC = 0x00;
     PORTB = 0x00;
     TRISD = 0x00;
     TRISB = 0x00;
     
 while(PORTC.F0 == 0)
     {
     Portd = 0x00;
     msdelay(10);
     }
     //-------------------------------------------------------------------------
     //INITIAL STARTUP
     RD = 1;
     RS = 0;
     CS = 0;
     RW = 0;
     RST = 0;
     msdelay(10);
     RST = 1;


     write_2command(0x06,0x00);    //Set Display On_Off (display off)
     write_2command(0x05,0x00);    //Set SOFT_RST (normal mode)
     write_2command(0x04,0x03);    //Set REDUCE_CURRENT (disp off analog RST)
     msdelay(10);
     write_2command(0x04,0x00);    //(disp off, normal)
     msdelay(10);
     write_2command(0x3B,0x00);
     write_2command(0x02,0x41);    //Set OSC_CTL (internal OSC on)
     write_2command(0x03,0x30);    //Set CLOCK_DIV (OSC clock 1)

     write_2command(0x08,0x01);    //Set PRECHARGE_TIME_R (1 CLK)
     write_2command(0x09,0x02);    //Set PRECHARGE_TIME_G (1 CLK)
     write_2command(0x0A,0x01);    //Set PRECHARGE_TIME_B (1 CLK)

     write_2command(0x0B,0x0A);    //Set PRECHARGE_CURRENT_R
     write_2command(0x0C,0x0A);    //Set PRECHARGE_CURRENT_G
     write_2command(0x0D,0x0A);    //Set PRECHARGE_CURRENT_B

     write_2command(0x10,0x46);    //Set DRIVING_CURRENT_R
     write_2command(0x11,0x38);    //Set DRIVING_CURRENT_G
     write_2command(0x12,0x3A);    //Set DRIVING_CURRENT_B

     write_2command(0x13,0x00);    //Set DISPLAY_MODE_SET (normal)
     write_2command(0x14,0x31);    //Set RGB_IF (MPU mode)
     write_2command(0x28,0x2F);    //Set DUTY
     write_2command(0x29,0x00);    //Set DSL


     write_2command(0x16,0x76);    //Set MEMORY_WRITE_MODE (Triple 6-bit mode)


     msdelay(10);
     write_2command(0x3B,0x00);

     write_2command(0x80,0x00);    //Set IREF (controlled by external resistor)


     //write_2command(0x15,0x00);    //Set RGB_POL

     write_2command(0x17,0x00);    //Set MX1_ADDR
     write_2command(0x18,0x9F);    //Set MX2_ADDR
     write_2command(0x19,0x00);    //Set MY1_ADDR
     write_2command(0x1A,0x7F);    //Set MY2_ADDR
     write_2command(0x20,0x00);    //Set MEMORY_ACCESS_POINTER X
     write_2command(0x21,0x00);    //Set MEMORY_ACCESS_POINTER Y

     write_2command(0x2E,0x00);    //Set D1_DDRAM_FAC
     write_2command(0x2F,0x00);    //Set D1_DDRAM_FAR
     write_2command(0x31,0x00);    //Set D1_DDRAM_SAC
     write_2command(0x32,0x00);    //Set D1_DDRAM_SAR
     write_2command(0x33,0x00);    //Set SCR1_FX1 (0)
     write_2command(0x34,0x9F);    //Set SCR1_FX2 (159)
     write_2command(0x35,0x00);    //Set SCR1_FY1 (0)
     write_2command(0x36,0x7F);    //Set SCR1_FY2 (127)


     msdelay(100);
     write_2command(0x06,0x01);    //Set DISP_ON_OFF (Display on)

     lcdcmd(0x22);         //Access Data Ram port
     }
void lcdcmd(unsigned char value1)
{
ldata=0;
RS=0;
RW=0;
CS=0;
RD=1;
ldata=value1;
msdelay(1);
RD=0;
RW=1;
CS=1;
RS=1;
}
void lcddata(unsigned char value1)
{
ldata=value1;
RS=1;
RW=0;
RD=1;
ldata= value1;
msdelay(1);
RD=0;
CS=1;
RS=1;
}

void msdelay(unsigned char itime)
{
unsigned char i,j;
for(i=0;i<itime;i++)
for(j=0;j<135;j++);
}

My code is compiling(no errors) but it doesn't work. The display stay off.

Use CODE Tags when posting your code.
Click to expand...

Thank you
 
Last edited by a moderator:

Can you post the schematic of your circuit and the datasheet of the particular GLCD?

BigDog
 

Hi,

I hope you are well.
Here is the schematic.
 

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Hi,

Have you forgotten about me?:)
 

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