I'm using a PIC18F8520 MCU, MicroC IDE and a 128x64 GLCD. With the in-built library functions the GLCD is working fine, but I want to use code without using the library functions for portability reasons. Please help me with the source code to simply initialize the GLCD and display a character for now. Thank you in advance.
This is my code as of now and is not working:
Regards,#define GLCD_DI PORTJ.F2
#define GLCD_RW PORTJ.F3
#define GLCD_EN PORTJ.F4
#define GLCD_CS1 PORTJ.F0
#define GLCD_CS2 PORTJ.F1
#define GLCD_RST PORTJ.F5
#define GLCD_DATA PORTD
#define X_ADRESS 0xB8 // Adress base for Page 0
#define Y_ADRESS 0x40 // Adress base for Y0
#define START_LINE 0xC0 // Adress base for line 0
#define DISPLAY_ON 0x3F // Turn display on
#define DISPLAY_OFF 0x3E // Turn display off
#define RIGHT 0
#define LEFT 1
#define BUSY 0x80
typedef unsigned int U16;
void GLCDWaitBusy( )
{
GLCD_DATA= 0xFF; // Set LCD_DATA port in input mode
TRISD = 0xFF;
GLCD_DI = 0; // Instruction mode
GLCD_RW = 1; // Read mode
GLCD_EN = 0; // Strobe
Delay_ms( 10 );
GLCD_EN = 1;
//while( GLCD_DATA & 0x7F == BUSY ); // Mask the other status bits and test the BUSY bit
while( GLCD_DATA & 0x80 );
}
void GLCDInstructionWrite( U16 Instruction )
{
GLCDWaitBusy( ); // Wait until LCD not busy
GLCD_DI = 0; // Instruction mode
GLCD_RW = 0; // Write mode
GLCD_DATA = Instruction; // Outbyte
GLCD_EN = 1; // Strobe
Delay_ms( 10 );
GLCD_EN = 0;
}
void GLCDSelectSide( U16 Side )
{
if( Side == RIGHT )
{
// Switch to right
GLCD_EN = 0;
GLCD_DI = 0;
GLCD_RW = 1;
GLCD_CS1 = 0;
GLCD_CS2 = 1;
GLCDInstructionWrite( Y_ADRESS ); // Set column to 0
}
else
{
// Switch to left
GLCD_EN = 0;
GLCD_DI = 0;
GLCD_RW = 1;
GLCD_CS1 = 1;
GLCD_CS2 = 0;
GLCDInstructionWrite( Y_ADRESS ); // Set column to 0
}
}
void GLCDDataWrite( U16 Data )
{
GLCDWaitBusy( ); // Wait until LCD not busy
GLCD_DI = 1; // Data mode
GLCD_RW = 0; // Write mode
GLCD_DATA = Data; // Outbyte
GLCD_EN = 1; // Strobe
Delay_ms( 10 );
GLCD_EN = 0;
}
void GLCD_ClearScreen( )
{
U16 Page = 0;
U16 Column = 0;
// Process the 8 pages of the GLCD
for( Page = 0; Page < 8; Page++ )
{
GLCDSelectSide( LEFT ); // Select left side
GLCDInstructionWrite( X_ADRESS | Page ); // Set the page number
GLCDInstructionWrite( Y_ADRESS ); // Set column to 0
// Process a page on both sides
for ( Column = 0; Column < 128; Column++ )
{
if( Column == 64 )
{
GLCDSelectSide( RIGHT ); // Select right side
GLCDInstructionWrite( X_ADRESS | Page ); // Set the page number
GLCDInstructionWrite( Y_ADRESS ); // Set column to 0
}
GLCDDataWrite( 0x00 ); // Erase a column
}
}
}
void GLCDInt( )
{
GLCD_DATA = 0;
GLCD_DI = 0;
GLCD_RW = 0;
GLCD_EN = 0;
GLCD_CS1 = 0;
GLCD_CS2 = 0;
GLCD_RST = 1;
Delay_ms( 10 );
GLCD_RST=0;
Delay_ms( 10 );
GLCD_RST=1;
GLCDSelectSide( LEFT );
GLCDInstructionWrite( DISPLAY_OFF ); // Display OFF
GLCDInstructionWrite( START_LINE );
GLCDInstructionWrite( X_ADRESS );
GLCDInstructionWrite( Y_ADRESS );
GLCDInstructionWrite( DISPLAY_ON ); // Display ON
GLCDSelectSide( RIGHT );
GLCDInstructionWrite( DISPLAY_OFF ); // Display OFF
GLCDInstructionWrite( START_LINE );
GLCDInstructionWrite( X_ADRESS );
GLCDInstructionWrite( Y_ADRESS );
GLCDInstructionWrite( DISPLAY_ON ); // Display ON
GLCD_ClearScreen( );
}
U16 GLCDDataRead( )
{
GLCD_DATA = 0xFF; // Set LCD_DATA port in input mode
GLCD_RW = 1; // Read mode
GLCD_DI = 1; // Data mode
GLCD_EN = 0; // Strobe
Delay_ms( 10 );
GLCD_EN = 1;
Delay_ms( 10 );
return GLCD_DATA; // Return the data read
}
/*
void GLCDSetDot( U16 Xaxis, U16 Yaxis )
{
U16 DataRead = 0;
GLCDInstructionWrite( START_LINE ); // Set adress for line 0
// Left side
if( Xaxis < 64 )
{
GLCDSelectSide( LEFT ); // Select left side
GLCDInstructionWrite( X_ADRESS + ( Yaxis / 8 ) ); // Select page number
GLCDInstructionWrite( Y_ADRESS + Xaxis ); // Select column
DataRead = GLCDDataRead( ); // Read the current location
DataRead = GLCDDataRead( ); // on the LCD. dummy read
GLCDInstructionWrite( X_ADRESS + ( Yaxis / 8 ) ); // Select page number
GLCDInstructionWrite( Y_ADRESS + Xaxis ); // Select column
GLCDDataWrite( DataRead | ( 1 << ( Yaxis % 8 ) ) ); // Plot the dot
}
else
// Right side
{
GLCDSelectSide( RIGHT ); // Select left side
GLCDInstructionWrite( X_ADRESS + ( Yaxis / 8 ) ); // Select page number
GLCDInstructionWrite( Y_ADRESS + Xaxis - 64 ); // Select column
DataRead = GLCDDataRead( ); // Read the current location
DataRead = GLCDDataRead( ); // on the LCD. dummy read
GLCDInstructionWrite( X_ADRESS + ( Yaxis / 8 ) ); // Select page number
GLCDInstructionWrite( Y_ADRESS + Xaxis - 64 ); // Select column
GLCDDataWrite( DataRead | ( 1 << ( Yaxis % 8 ) ) ); // Plot the dot
}
GLCDInstructionWrite( START_LINE ); // Set adress for line 0
}
void GLCDRectangle( U16 Xaxis1, U16 Yaxis1, U16 Xaxis2, U16 Yaxis2 )
{
U16 CurrentValue = 0;
// Draw the two horizontal lines
for( CurrentValue = 0; CurrentValue < Xaxis2 - Xaxis1+ 1; CurrentValue++ )
{
GLCDSetDot( Xaxis1 + CurrentValue, Yaxis1 );
GLCDSetDot( Xaxis1 + CurrentValue, Yaxis2 );
}
// Draw the two vertical lines
for( CurrentValue = 0; CurrentValue < Yaxis2 - Yaxis1 + 1; CurrentValue++ )
{
GLCDSetDot( Xaxis1, Yaxis1 + CurrentValue );
GLCDSetDot( Xaxis2, Yaxis1 + CurrentValue );
}
}
*/
void main( )
{
CMCON |= 0x07; // Turn off comparators
ADCON1 |= 0x0F; // Turn off analog inputs
MEMCON.EBDIS = 1; // Disable external memory bus
TRISJ = 0;
TRISD = 0;
//GLCDInt( );
//GLCDDataWrite( 0x65 );
//GLCDRectangle( 1, 1, 1, 1 );
Glcd_Init( &PORTJ, 0, 1, 2, 3, 5, 4, &PORTD ); // Glcd_Init_BP5, see Autocomplete
Glcd_Fill( 0x00 );
GLCD_Write_Text( "RACE=DYNAMICS" , 25, 11, 2 );
//GLCDSetDot(0,0);
//GLCDRectangle( 0, 0, 10, 10 );
}
Deepak.[/b]
