Vlad Craciun
/
SSD1289_TouchScreen
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TouchPanel.cpp
- Committer:
- vcraciun
- Date:
- 2013-09-14
- Revision:
- 1:e7ae315a1ceb
- Parent:
- 0:55a3f0eda74d
- Child:
- 2:a31069f27cd5
File content as of revision 1:e7ae315a1ceb:
#include "TouchPanel.h"
Matrix matrix ;
Coordinate display ;
Coordinate ScreenSample[3];
Coordinate DisplaySample[3] = {{30, 45},
{250, 70},
{160,210}};
Touch::Touch(SSD1289_LCD *lcd,SPI *spi, DigitalOut *cs, DigitalIn *irq)
{
_cs=cs;
*_cs=1;
_spi=spi;
_irq=irq;
_lcd=lcd;
}
void Touch::InitializeTouch()
{
_spi->format(8,0);
_spi->frequency(100000);
*_cs = 1;
}
int Touch::RDAD(void)
{
unsigned short buf,temp;
temp=_spi->write(0);
buf=temp<<8;
temp=_spi->write(0);
buf|=temp;
buf>>=3;
buf&=0xFFF;
return buf;
}
int Touch::ReadX(void)
{
int i;
*_cs=0;
wait(0.000001);
_spi->write(CHX);
wait(0.000001);
i=RDAD();
*_cs=1;
return i;
}
int Touch::ReadY(void)
{
int i;
*_cs=0;
wait(0.000001);
_spi->write(CHY);
wait(0.000001);
i=RDAD();
*_cs=1;
return i;
}
void Touch::GetAdXY(int *x,int *y)
{
int adx,ady;
adx=ReadX();
wait(0.000001);
ady=ReadY();
*x=adx;
*y=ady;
}
void Touch::DrawPoint(int Xpos,int Ypos)
{
_lcd->DrawPixel(Xpos,Ypos,COLOR_BLUE);
_lcd->DrawPixel(Xpos+1,Ypos,COLOR_BLUE);
_lcd->DrawPixel(Xpos,Ypos+1,COLOR_BLUE);
_lcd->DrawPixel(Xpos+1,Ypos+1,COLOR_BLUE);
}
void Touch::DrawCross(int Xpos,int Ypos)
{
_lcd->DrawLine(Xpos-15,Ypos,Xpos-2,Ypos,COLOR_WHITE);
_lcd->DrawLine(Xpos+2,Ypos,Xpos+15,Ypos,COLOR_WHITE);
_lcd->DrawLine(Xpos,Ypos-15,Xpos,Ypos-2,COLOR_WHITE);
_lcd->DrawLine(Xpos,Ypos+2,Xpos,Ypos+15,COLOR_WHITE);
_lcd->DrawLine(Xpos-15,Ypos+15,Xpos-7,Ypos+15,RGB(184,158,131));
_lcd->DrawLine(Xpos-15,Ypos+7,Xpos-15,Ypos+15,RGB(184,158,131));
_lcd->DrawLine(Xpos-15,Ypos-15,Xpos-7,Ypos-15,RGB(184,158,131));
_lcd->DrawLine(Xpos-15,Ypos-7,Xpos-15,Ypos-15,RGB(184,158,131));
_lcd->DrawLine(Xpos+7,Ypos+15,Xpos+15,Ypos+15,RGB(184,158,131));
_lcd->DrawLine(Xpos+15,Ypos+7,Xpos+15,Ypos+15,RGB(184,158,131));
_lcd->DrawLine(Xpos+7,Ypos-15,Xpos+15,Ypos-15,RGB(184,158,131));
_lcd->DrawLine(Xpos+15,Ypos-15,Xpos+15,Ypos-7,RGB(184,158,131));
}
Coordinate *Touch::ReadAds7846(void)
{
static Coordinate screen;
int m0,m1,m2,TP_X[1],TP_Y[1],temp[3];
uint8_t count=0;
int buffer[2][9]={{0},{0}};
do
{
GetAdXY(TP_X,TP_Y);
buffer[0][count]=TP_X[0];
buffer[1][count]=TP_Y[0];
count++;
}
while((!_irq->read()) && count<9)
;
if(count==9)
{
temp[0]=(buffer[0][0]+buffer[0][1]+buffer[0][2])/3;
temp[1]=(buffer[0][3]+buffer[0][4]+buffer[0][5])/3;
temp[2]=(buffer[0][6]+buffer[0][7]+buffer[0][8])/3;
m0=temp[0]-temp[1];
m1=temp[1]-temp[2];
m2=temp[2]-temp[0];
m0=m0>0?m0:(-m0);
m1=m1>0?m1:(-m1);
m2=m2>0?m2:(-m2);
if( m0>THRESHOLD && m1>THRESHOLD && m2>THRESHOLD )
return 0;
if(m0<m1)
{
if(m2<m0)
screen.x=(temp[0]+temp[2])/2;
else
screen.x=(temp[0]+temp[1])/2;
}
else if(m2<m1)
screen.x=(temp[0]+temp[2])/2;
else
screen.x=(temp[1]+temp[2])/2;
temp[0]=(buffer[1][0]+buffer[1][1]+buffer[1][2])/3;
temp[1]=(buffer[1][3]+buffer[1][4]+buffer[1][5])/3;
temp[2]=(buffer[1][6]+buffer[1][7]+buffer[1][8])/3;
m0=temp[0]-temp[1];
m1=temp[1]-temp[2];
m2=temp[2]-temp[0];
m0=m0>0?m0:(-m0);
m1=m1>0?m1:(-m1);
m2=m2>0?m2:(-m2);
if(m0>THRESHOLD&&m1>THRESHOLD&&m2>THRESHOLD)
return 0;
if(m0<m1)
{
if(m2<m0)
screen.y=(temp[0]+temp[2])/2;
else
screen.y=(temp[0]+temp[1])/2;
}
else if(m2<m1)
screen.y=(temp[0]+temp[2])/2;
else
screen.y=(temp[1]+temp[2])/2;
return &screen;
}
return 0;
}
bool Touch::setCalibrationMatrix( Coordinate * displayPtr, Coordinate * screenPtr, Matrix * matrixPtr)
{
bool retTHRESHOLD = true ;
matrixPtr->Divider = ((screenPtr[0].x - screenPtr[2].x) * (screenPtr[1].y - screenPtr[2].y)) - ((screenPtr[1].x - screenPtr[2].x) * (screenPtr[0].y - screenPtr[2].y)) ;
if( matrixPtr->Divider == 0 )
{
retTHRESHOLD = false;
}
else
{
matrixPtr->An = ((displayPtr[0].x - displayPtr[2].x) * (screenPtr[1].y - screenPtr[2].y)) - ((displayPtr[1].x - displayPtr[2].x) * (screenPtr[0].y - screenPtr[2].y)) ;
matrixPtr->Bn = ((screenPtr[0].x - screenPtr[2].x) * (displayPtr[1].x - displayPtr[2].x)) - ((displayPtr[0].x - displayPtr[2].x) * (screenPtr[1].x - screenPtr[2].x)) ;
matrixPtr->Cn = (screenPtr[2].x * displayPtr[1].x - screenPtr[1].x * displayPtr[2].x) * screenPtr[0].y + (screenPtr[0].x * displayPtr[2].x - screenPtr[2].x * displayPtr[0].x) * screenPtr[1].y + (screenPtr[1].x * displayPtr[0].x - screenPtr[0].x * displayPtr[1].x) * screenPtr[2].y ;
matrixPtr->Dn = ((displayPtr[0].y - displayPtr[2].y) * (screenPtr[1].y - screenPtr[2].y)) - ((displayPtr[1].y - displayPtr[2].y) * (screenPtr[0].y - screenPtr[2].y)) ;
matrixPtr->En = ((screenPtr[0].x - screenPtr[2].x) * (displayPtr[1].y - displayPtr[2].y)) - ((displayPtr[0].y - displayPtr[2].y) * (screenPtr[1].x - screenPtr[2].x)) ;
matrixPtr->Fn = (screenPtr[2].x * displayPtr[1].y - screenPtr[1].x * displayPtr[2].y) * screenPtr[0].y + (screenPtr[0].x * displayPtr[2].y - screenPtr[2].x * displayPtr[0].y) * screenPtr[1].y + (screenPtr[1].x * displayPtr[0].y - screenPtr[0].x * displayPtr[1].y) * screenPtr[2].y ;
}
return( retTHRESHOLD ) ;
}
void Touch::TouchPanel_Calibrate(void)
{
uint8_t i;
Coordinate * Ptr;
for(i=0;i<3;i++)
{
_lcd->ClearScreen();
_lcd->SetFont( &Font8x16 );
_lcd->Print("Calibrare Touch-Screen",CENTER,10,COLOR_WHITE,COLOR_BLACK,0);
wait(0.3);
DrawCross(DisplaySample[i].x,DisplaySample[i].y);
do
{
Ptr=ReadAds7846();
}
while( Ptr == (void*)0 );
ScreenSample[i].x= Ptr->x; ScreenSample[i].y= Ptr->y;
}
setCalibrationMatrix( &DisplaySample[0],&ScreenSample[0],&matrix );
}