Problem With Coding a TFT Display
I am an Electronic Engineering, working on my FYP; using a TFT display 320x240 in pixels, and RGB format of 666. it is using the SSD1963 controller for graphics and i am having trouble getting the programing code to work. If you can take a look at the following code and make some suggestions or adjustments that maybe the problem as to why its not working it will be greatly appreciated. Right now i am trying to display a specific colour on the screen for example just blue, or red or green. Eventually i would like to display some images.
Karthick.
//---------------------------------------------------------
/*
SSD1963_8-bit
Program for writing to Newhaven Display 5.7" TFT
*/
//---------------------------------------------------------
#define CD PORTA.B0 //REGISTER SELECT - 1: Command, 0: Data
#define nWR PORTA.B1 //ACTIVE LOW WRITE
#define nRD PORTA.B2 //ACTIVE LOW READ
#define CS PORTA.B3 //CHIP SELECT
#define RESET PORTA.B4 //RESET
//=======================================
void Write_Command(unsigned char command)
{
nRD = 1;
PORTB = command;
CD = 0;
nWR = 0;
CS = 0;
CS = 1;
nWR = 1;
}
//;******************************************************************************
void Write_Data(unsigned char data1)
{
nRD = 1;
PORTB = data1;
CD = 1;
nWR = 0;
CS = 0;
CS = 1;
nWR = 1;
}
//====================================================
void Command_Write(unsigned char REG,unsigned char VALUE)
{
Write_Command(REG);
Write_Data(VALUE);
}
//======================================================
void SendData(unsigned long color)
{
Write_Data((color)>>16); //red
Write_Data((color)>>8); //green
Write_Data(color); //blue
}
//======================================================
// initialize controller
//======================================================
void Init_SSD1963()
{
RESET = 0;
Delay_ms(5);
RESET = 1;
Delay_ms(100);
Write_Command(0x01); //Software Reset
Write_Command(0x01);
Write_Command(0x01);
Delay_ms(10);
Command_Write(0xe0,0x01); //START PLL
Command_Write(0xe0,0x03); //LOCK PLL
Write_Command(0xb0); //SET LCD MODE SET TFT 18Bits MODE
Write_Data(0x0c); //SET TFT MODE & hsync+Vsync+DEN MODE
Write_Data(0x80); //SET TFT MODE & hsync+Vsync+DEN MODE
Write_Data(0x01); //SET horizontal size=320-1 HightByte
Write_Data(0x3f); //SET horizontal size=320-1 LowByte
Write_Data(0x00); //SET vertical size=240-1 HightByte
Write_Data(0xef); //SET vertical size=240-1 LowByte
Write_Data(0x00); //SET even/odd line RGB seq.=RGB
Command_Write(0xf0,0x00); //SET pixel data I/F format=8bit
Command_Write(0x3a,0x60); // SET R G B format = 6 6 6
Write_Command(0xe6); //SET PCLK freq=4.94MHz ; pixel clock frequency
Write_Data(0x02);
Write_Data(0xff);
Write_Data(0xff);
Write_Command(0xb4); //SET HBP,
Write_Data(0x01); //SET HSYNC Total 440
Write_Data(0xb8);
Write_Data(0x00); //SET HBP 68
Write_Data(0x44);
Write_Data(0x0f); //SET VBP 16=15+1
Write_Data(0x00); //SET Hsync pulse start position
Write_Data(0x00);
Write_Data(0x00); //SET Hsync pulse subpixel start position
Write_Command(0xb6); //SET VBP,
Write_Data(0x01); //SET Vsync total 265=264+1
Write_Data(0x08);
Write_Data(0x00); //SET VBP=19
Write_Data(0x13);
Write_Data(0x07); //SET Vsync pulse 8=7+1
Write_Data(0x00); //SET Vsync pulse start position
Write_Data(0x00);
Write_Command(0x2a); //SET column address
Write_Data(0x00); //SET start column address=0
Write_Data(0x00);
Write_Data(0x01); //SET end column address=319
Write_Data(0x3f);
Write_Command(0x2b); //SET page address
Write_Data(0x00); //SET start page address=0
Write_Data(0x00);
Write_Data(0x00); //SET end page address=239
Write_Data(0xef);
Write_Command(0x29); //SET display on
}
//======================================================
void WindowSet(unsigned int s_x,unsigned int e_x,unsigned int s_y,unsigned int e_y)
{
Write_Command(0x2a); //SET page address
Write_Data((s_x)>>8); //SET start page address=0
Write_Data(s_x);
Write_Data((e_x)>>8); //SET end page address=319
Write_Data(e_x);
Write_Command(0x2b); //SET column address
Write_Data((s_y)>>8); //SET start column address=0
Write_Data(s_y);
Write_Data((e_y)>>8); //SET end column address=239
Write_Data(e_y);
}
//=======================================
void FULL_ON(unsigned long dat)
{
unsigned char x,y;
WindowSet(0x0000,0x013f,0x0000,0x00ef);
Write_Command(0x2c);
for(x=0;x<240;x++)
{
for(y= 0;y<320;y++)
{
SendData(dat);
}
}
}
//=======================================
void QUADS()
{
unsigned int i,j;
WindowSet(0x0000,0x013f,0x0000,0x00ef);
Write_Command(0x2c);
for(j= 0 ;j<120;j++)
{
for(i=0;i<160;i++)
{
SendData(0x0000FF); //blue
}
for(i=0;i<160;i++)
{
SendData(0xFF0000); //red
}
}
for(j= 0 ;j<120;j++)
{
for(i=0;i<160;i++)
{
SendData(0xFFFF00); //yellow
}
for(i=0;i<160;i++)
{
SendData(0x00FF00); //green
}
}
}
//=======================================
void main()
{
int count = 3;
TRISA=0;
TRISB=0;
//while(1){
Init_SSD1963();
Delay_ms(5);
QUADS();
//Delay_ms(200);
//delayms(2000);
//FULL_ON(0xff0000); //red
//delayms(2000);
//FULL_ON(0x00ff00); //green
//delayms(2000);
//FULL_ON(0x0000ff); //blue
//FULL_ON(0xFFFF00); //yelow
//delayms(2000);
//}
}
Karthick.
//---------------------------------------------------------
/*
SSD1963_8-bit
Program for writing to Newhaven Display 5.7" TFT
*/
//---------------------------------------------------------
#define CD PORTA.B0 //REGISTER SELECT - 1: Command, 0: Data
#define nWR PORTA.B1 //ACTIVE LOW WRITE
#define nRD PORTA.B2 //ACTIVE LOW READ
#define CS PORTA.B3 //CHIP SELECT
#define RESET PORTA.B4 //RESET
//=======================================
void Write_Command(unsigned char command)
{
nRD = 1;
PORTB = command;
CD = 0;
nWR = 0;
CS = 0;
CS = 1;
nWR = 1;
}
//;******************************************************************************
void Write_Data(unsigned char data1)
{
nRD = 1;
PORTB = data1;
CD = 1;
nWR = 0;
CS = 0;
CS = 1;
nWR = 1;
}
//====================================================
void Command_Write(unsigned char REG,unsigned char VALUE)
{
Write_Command(REG);
Write_Data(VALUE);
}
//======================================================
void SendData(unsigned long color)
{
Write_Data((color)>>16); //red
Write_Data((color)>>8); //green
Write_Data(color); //blue
}
//======================================================
// initialize controller
//======================================================
void Init_SSD1963()
{
RESET = 0;
Delay_ms(5);
RESET = 1;
Delay_ms(100);
Write_Command(0x01); //Software Reset
Write_Command(0x01);
Write_Command(0x01);
Delay_ms(10);
Command_Write(0xe0,0x01); //START PLL
Command_Write(0xe0,0x03); //LOCK PLL
Write_Command(0xb0); //SET LCD MODE SET TFT 18Bits MODE
Write_Data(0x0c); //SET TFT MODE & hsync+Vsync+DEN MODE
Write_Data(0x80); //SET TFT MODE & hsync+Vsync+DEN MODE
Write_Data(0x01); //SET horizontal size=320-1 HightByte
Write_Data(0x3f); //SET horizontal size=320-1 LowByte
Write_Data(0x00); //SET vertical size=240-1 HightByte
Write_Data(0xef); //SET vertical size=240-1 LowByte
Write_Data(0x00); //SET even/odd line RGB seq.=RGB
Command_Write(0xf0,0x00); //SET pixel data I/F format=8bit
Command_Write(0x3a,0x60); // SET R G B format = 6 6 6
Write_Command(0xe6); //SET PCLK freq=4.94MHz ; pixel clock frequency
Write_Data(0x02);
Write_Data(0xff);
Write_Data(0xff);
Write_Command(0xb4); //SET HBP,
Write_Data(0x01); //SET HSYNC Total 440
Write_Data(0xb8);
Write_Data(0x00); //SET HBP 68
Write_Data(0x44);
Write_Data(0x0f); //SET VBP 16=15+1
Write_Data(0x00); //SET Hsync pulse start position
Write_Data(0x00);
Write_Data(0x00); //SET Hsync pulse subpixel start position
Write_Command(0xb6); //SET VBP,
Write_Data(0x01); //SET Vsync total 265=264+1
Write_Data(0x08);
Write_Data(0x00); //SET VBP=19
Write_Data(0x13);
Write_Data(0x07); //SET Vsync pulse 8=7+1
Write_Data(0x00); //SET Vsync pulse start position
Write_Data(0x00);
Write_Command(0x2a); //SET column address
Write_Data(0x00); //SET start column address=0
Write_Data(0x00);
Write_Data(0x01); //SET end column address=319
Write_Data(0x3f);
Write_Command(0x2b); //SET page address
Write_Data(0x00); //SET start page address=0
Write_Data(0x00);
Write_Data(0x00); //SET end page address=239
Write_Data(0xef);
Write_Command(0x29); //SET display on
}
//======================================================
void WindowSet(unsigned int s_x,unsigned int e_x,unsigned int s_y,unsigned int e_y)
{
Write_Command(0x2a); //SET page address
Write_Data((s_x)>>8); //SET start page address=0
Write_Data(s_x);
Write_Data((e_x)>>8); //SET end page address=319
Write_Data(e_x);
Write_Command(0x2b); //SET column address
Write_Data((s_y)>>8); //SET start column address=0
Write_Data(s_y);
Write_Data((e_y)>>8); //SET end column address=239
Write_Data(e_y);
}
//=======================================
void FULL_ON(unsigned long dat)
{
unsigned char x,y;
WindowSet(0x0000,0x013f,0x0000,0x00ef);
Write_Command(0x2c);
for(x=0;x<240;x++)
{
for(y= 0;y<320;y++)
{
SendData(dat);
}
}
}
//=======================================
void QUADS()
{
unsigned int i,j;
WindowSet(0x0000,0x013f,0x0000,0x00ef);
Write_Command(0x2c);
for(j= 0 ;j<120;j++)
{
for(i=0;i<160;i++)
{
SendData(0x0000FF); //blue
}
for(i=0;i<160;i++)
{
SendData(0xFF0000); //red
}
}
for(j= 0 ;j<120;j++)
{
for(i=0;i<160;i++)
{
SendData(0xFFFF00); //yellow
}
for(i=0;i<160;i++)
{
SendData(0x00FF00); //green
}
}
}
//=======================================
void main()
{
int count = 3;
TRISA=0;
TRISB=0;
//while(1){
Init_SSD1963();
Delay_ms(5);
QUADS();
//Delay_ms(200);
//delayms(2000);
//FULL_ON(0xff0000); //red
//delayms(2000);
//FULL_ON(0x00ff00); //green
//delayms(2000);
//FULL_ON(0x0000ff); //blue
//FULL_ON(0xFFFF00); //yelow
//delayms(2000);
//}
}
Replies
-
fvparghello. I use the following code sample:
WINSTAR_TFT Application Note. 8bit-80 interface mode , 262K color , 5.7_Panel:320xRGBx240
{
Initial_SSD1963();
FULL_ON(0xff0000); // red
FULL_ON(0x00ff00); // green
FULL_ON(0x0000ff); // blue
}
void Write_Command (unsigned char command)
{
IC_RD = 1; // /RD=1
IC_A0 = 0; // D/C=0
IC_WR= 0; // /WR=0
IC_CS = 0; // /CS=0
Data_BUS = command; // Data Bus OUT
IC_CS = 1; // /CS=1
IC_WR= 1; // /WR=1
}
void Write_Data (unsigned char data1)
{
IC_RD = 1;
IC_A0 = 1;
IC_WR = 0;
IC_CS = 0;
Data_BUS = data1;
IC_CS = 1;
IC_WR= 1;
}
void Command_Write(unsigned char command,unsigned char data1)
{
Write_Command(command);
Write_Data(data1);
}
void SendData(unsigned long color)
{
Write_Data((color)>>16); // color is red
Write_Data((color)>>8); // color is green
Write_Data(color); // color is blue
}
void main(void)
void Initial_SSD1963 (void) //for 5.7 QVGA
{
IC_RST = 0;
_nop_();
_nop_();
_nop_();
IC_RST = 1;
_nop_();
_nop_();
_nop_();
Write_Command(0x01); //Software Reset
Write_Command(0x01);
Write_Command(0x01);
Command_Write(0xe0,0x01); // START PLL
Command_Write(0xe0,0x03); // LOCK PLL
Write_Command(0xb0); //SET LCD MODE SET TFT 18Bits MODE
Write_Data(0x0c); //SET TFT MODE & hsync+Vsync+DEN MODE
Write_Data(0x80); //SET TFT MODE & hsync+Vsync+DEN MODE
Write_Data(0x01); //SET horizontal size=320-1 HightByte
Write_Data(0x3f); //SET horizontal size=320-1 LowByte
Write_Data(0x00); //SET vertical size=240-1 HightByte
Write_Data(0xef); //SET vertical size=240-1 LowByte
Write_Data(0x00); //SET even/odd line RGB seq.=RGB
Command_Write(0xf0,0x00); //SET pixel data I/F format=8bit
Command_Write(0x3a,0x60); // SET R G B format = 6 6 6
Write_Command(0xe6); //SET PCLK freq=6.4MHz ; pixel clock frequency
Write_Data(0x00);
Write_Data(0xe7);
Write_Data(0x4f);
Write_Command(0xb4); //SET HBP
Write_Data(0x01); //SET HSYNC Total = 440
Write_Data(0xb8);
Write_Data(0x00); //SET HBP = 68
Write_Data(0x44);
Write_Data(0x0f); //SET VBP 16 = 15 + 1
Write_Data(0x00); //SET Hsync pulse start position
Write_Data(0x00);
Write_Data(0x00); //SET Hsync pulse subpixel start position
Write_Command(0xb6); //SET VBP
Write_Data(0x01); //SET Vsync total 265 = 264 + 1
Write_Data(0x08);
Write_Data(0x00); //SET VBP = 19
Write_Data(0x13);
Write_Data(0x07); //SET Vsync pulse 8 = 7 + 1
Write_Data(0x00); //SET Vsync pulse start position
Write_Data(0x00);
Write_Command(0x2a); //SET column address
Write_Data(0x00); //SET start column address=0
Write_Data(0x00);
Write_Data(0x01); //SET end column address=320
Write_Data(0x3f);
Write_Command(0x2b); //SET page address
Write_Data(0x00); //SET start page address=0
Write_Data(0x00);
Write_Data(0x00); //SET end page address=240
Write_Data(0xef);
Write_Command(0x29); //SET display on
Write_Command(0x2c);
}
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