clemente di caprio
Library for MI0283QT-2 LCD
Diff: Touchlib.c
- Revision:
- 0:7ad454fed160
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/Touchlib.c Wed May 23 06:25:31 2012 +0000
@@ -0,0 +1,286 @@
+/* mbed TouchScreen ADS7846 library.
+
+ Copyright (c) 2011 NXP 3803
+
+ Permission is hereby granted, free of charge, to any person obtaining a copy
+ of this software and associated documentation files (the "Software"), to deal
+ in the Software without restriction, including without limitation the rights
+ to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ copies of the Software, and to permit persons to whom the Software is
+ furnished to do so, subject to the following conditions:
+
+ The above copyright notice and this permission notice shall be included in
+ all copies or substantial portions of the Software.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ THE SOFTWARE.
+*/
+
+#include "mbed.h"
+#include "string.h"
+#include "Touchlib.h"
+#include "calibrate.h"
+#include "crocino.h"
+
+/* */
+unsigned char TSCmd[cTS_CMDSIZE] = {
+ cTS_GETY, 0x00, cTS_GETY, 0x00, /* y */
+ cTS_GETZ1, 0x00, cTS_GETZ1, 0x00, /* z1 */
+ cTS_GETZ2, 0x00, cTS_GETZ2, 0x00, /* z2 */
+ cTS_GETX, 0x00, cTS_END, 0x00, 0x00 /* x */
+};
+
+#define cTS_SAMPLE 8
+#define MODE12 0
+
+POINT crocino_coord[3] = {
+ {80,120},
+ {240,60},
+ {240,180}
+};
+
+MATRIX TS_Matrix;
+
+unsigned char TSValue[cTS_CMDSIZE];
+unsigned int tap_debounce;
+
+DigitalOut TS_DBG_LED(LED4);
+
+TOUCHS::TOUCHS( PinName mosi, PinName miso, PinName sclk, PinName cs, PinName penirq) : _spi( mosi, miso, sclk), _cs( cs), _penirq( penirq) {
+ // defaults params
+
+}
+
+unsigned int TOUCHS::setcalibration( _TS_COORD *ts)
+{
+ POINT screen[3];
+ /* from struct TS_COORD to struct POINT. */
+ screen[0].x=ts[0].x;
+ screen[0].y=ts[0].y;
+ screen[1].x=ts[1].x;
+ screen[1].y=ts[1].y;
+ screen[2].x=ts[2].x;
+ screen[2].y=ts[2].y;
+ /* Now start the calibration process. */
+ ts_val.calibration_done=!setCalibrationMatrix( &crocino_coord[0], &screen[0], &TS_Matrix);
+ /* Return the result. */
+ return( ts_val.calibration_done);
+}
+
+unsigned int TOUCHS::calibrate( void)
+{
+ POINT ts_tmp, coord;
+
+ coord.x=ts_val.coord.x;
+ coord.y=ts_val.coord.y;
+ // see calibrate.c
+ getDisplayPoint( &ts_tmp, &coord, &TS_Matrix);
+ //
+ ts_val.coord.x = ts_tmp.x;
+ ts_val.coord.y = ts_tmp.y;
+
+ return 0;
+}
+
+unsigned int TOUCHS::crocino_size( void)
+{
+ return( cTS_CROCINO);
+}
+
+unsigned int TOUCHS::getcrocino_x( unsigned char idx)
+{
+ if ( idx > 3)
+ idx=3;
+
+ return ( crocino_coord[idx].x);
+}
+
+unsigned int TOUCHS::getcrocino_y( unsigned char idx)
+{
+ if ( idx > 3)
+ idx=3;
+
+ return ( crocino_coord[idx].y);
+}
+
+unsigned int TOUCHS::gettsmatrixsize( void)
+{
+ return( sizeof( TS_Matrix));
+}
+
+void TOUCHS::gettsmatrix( unsigned char *pmatrix)
+{
+
+ *pmatrix++=((unsigned char*)&TS_Matrix.An)[0];
+ *pmatrix++=((unsigned char*)&TS_Matrix.An)[1];
+ *pmatrix++=((unsigned char*)&TS_Matrix.An)[2];
+ *pmatrix++=((unsigned char*)&TS_Matrix.An)[3];
+ *pmatrix++=((unsigned char*)&TS_Matrix.Bn)[0];
+ *pmatrix++=((unsigned char*)&TS_Matrix.Bn)[1];
+ *pmatrix++=((unsigned char*)&TS_Matrix.Bn)[2];
+ *pmatrix++=((unsigned char*)&TS_Matrix.Bn)[3];
+ *pmatrix++=((unsigned char*)&TS_Matrix.Cn)[0];
+ *pmatrix++=((unsigned char*)&TS_Matrix.Cn)[1];
+ *pmatrix++=((unsigned char*)&TS_Matrix.Cn)[2];
+ *pmatrix++=((unsigned char*)&TS_Matrix.Cn)[3];
+ *pmatrix++=((unsigned char*)&TS_Matrix.Dn)[0];
+ *pmatrix++=((unsigned char*)&TS_Matrix.Dn)[1];
+ *pmatrix++=((unsigned char*)&TS_Matrix.Dn)[2];
+ *pmatrix++=((unsigned char*)&TS_Matrix.Dn)[3];
+ *pmatrix++=((unsigned char*)&TS_Matrix.En)[0];
+ *pmatrix++=((unsigned char*)&TS_Matrix.En)[1];
+ *pmatrix++=((unsigned char*)&TS_Matrix.En)[2];
+ *pmatrix++=((unsigned char*)&TS_Matrix.En)[3];
+ *pmatrix++=((unsigned char*)&TS_Matrix.Fn)[0];
+ *pmatrix++=((unsigned char*)&TS_Matrix.Fn)[1];
+ *pmatrix++=((unsigned char*)&TS_Matrix.Fn)[2];
+ *pmatrix++=((unsigned char*)&TS_Matrix.Fn)[3];
+ *pmatrix++=((unsigned char*)&TS_Matrix.Divider)[0];
+ *pmatrix++=((unsigned char*)&TS_Matrix.Divider)[1];
+ *pmatrix++=((unsigned char*)&TS_Matrix.Divider)[2];
+ *pmatrix++=((unsigned char*)&TS_Matrix.Divider)[3];
+
+}
+
+void TOUCHS::settsmatrix( unsigned char *pmatrix)
+{
+
+ ((unsigned char*)&TS_Matrix.An)[0]=*pmatrix++;
+ ((unsigned char*)&TS_Matrix.An)[1]=*pmatrix++;
+ ((unsigned char*)&TS_Matrix.An)[2]=*pmatrix++;
+ ((unsigned char*)&TS_Matrix.An)[3]=*pmatrix++;
+ ((unsigned char*)&TS_Matrix.Bn)[0]=*pmatrix++;
+ ((unsigned char*)&TS_Matrix.Bn)[1]=*pmatrix++;
+ ((unsigned char*)&TS_Matrix.Bn)[2]=*pmatrix++;
+ ((unsigned char*)&TS_Matrix.Bn)[3]=*pmatrix++;
+ ((unsigned char*)&TS_Matrix.Cn)[0]=*pmatrix++;
+ ((unsigned char*)&TS_Matrix.Cn)[1]=*pmatrix++;
+ ((unsigned char*)&TS_Matrix.Cn)[2]=*pmatrix++;
+ ((unsigned char*)&TS_Matrix.Cn)[3]=*pmatrix++;
+ ((unsigned char*)&TS_Matrix.Dn)[0]=*pmatrix++;
+ ((unsigned char*)&TS_Matrix.Dn)[1]=*pmatrix++;
+ ((unsigned char*)&TS_Matrix.Dn)[2]=*pmatrix++;
+ ((unsigned char*)&TS_Matrix.Dn)[3]=*pmatrix++;
+ ((unsigned char*)&TS_Matrix.En)[0]=*pmatrix++;
+ ((unsigned char*)&TS_Matrix.En)[1]=*pmatrix++;
+ ((unsigned char*)&TS_Matrix.En)[2]=*pmatrix++;
+ ((unsigned char*)&TS_Matrix.En)[3]=*pmatrix++;
+ ((unsigned char*)&TS_Matrix.Fn)[0]=*pmatrix++;
+ ((unsigned char*)&TS_Matrix.Fn)[1]=*pmatrix++;
+ ((unsigned char*)&TS_Matrix.Fn)[2]=*pmatrix++;
+ ((unsigned char*)&TS_Matrix.Fn)[3]=*pmatrix++;
+ ((unsigned char*)&TS_Matrix.Divider)[0]=*pmatrix++;
+ ((unsigned char*)&TS_Matrix.Divider)[1]=*pmatrix++;
+ ((unsigned char*)&TS_Matrix.Divider)[2]=*pmatrix++;
+ ((unsigned char*)&TS_Matrix.Divider)[3]=*pmatrix++;
+
+ ts_val.calibration_done=1;
+
+}
+
+void TOUCHS::init( void)
+{
+ _spi.format( 8, BUS_MODE);
+ _spi.frequency( TS_SPEED);
+
+}
+
+
+void TOUCHS::do_tap( void)
+{
+ unsigned int i, x, y;
+
+ if ( TOUCHS::pressure() && ts_val.touched==0) {
+ printf("press: %d\r\n", tap_debounce );
+ tap_debounce++;
+ if ( tap_debounce>= cTS_DEBOUNCE) {
+ tap_debounce=0;
+ ts_val.touched=1;
+ for ( i=4, x=0,y=0; i!=0; i--) {
+ TOUCHS::read( &ts_val.coord);
+ x+=ts_val.coord.x;
+ y+=ts_val.coord.y;
+ }
+ ts_val.coord.x=x>>2;
+ ts_val.coord.y=y>>2;
+ // If the calibration process was successful complited...
+ if ( ts_val.calibration_done) {
+ // ...run the convertion from touch to screen coord.
+ TOUCHS::calibrate();
+ }
+ }
+ }
+}
+
+unsigned int TOUCHS::pressure( void)
+{
+ unsigned char pressure;
+ unsigned char iZ2, iZ1;
+
+ _spi.frequency( TS_SPEED);
+
+ _cs = 0; /* Seleziono il CS del TS */
+
+ _spi.write( 0xB0);
+ iZ1 = _spi.write( 0x00);
+ //
+ _spi.write( 0xC0);
+ iZ2 = 127-_spi.write( 0x00);
+ _cs = 1; /* De-Seleziono il CS del TS */
+
+ pressure=iZ1+iZ2;
+
+ if ( pressure > 3) {
+ // ts_val.touched=1;
+ return( 1);
+ } else {
+ // ts_val.touched=0;
+ return( 0);
+ }
+
+}
+
+/* Read the value from the touch. Write the raw value inside the struct TS_COORD. */
+void TOUCHS::read( _TS_COORD *ts)
+{
+ unsigned int i, idx;
+ unsigned int iZ1, iZ2;
+
+ _spi.frequency( TS_SPEED);
+
+ idx=0;
+ while( 1) {
+ //
+ i=0;
+ _cs = 0; /* Assert the CS */
+
+ while ( i<cTS_CMDSIZE) {
+ TSValue[i] = _spi.write( TSCmd[i]);
+ /* */
+ i++;
+ }
+
+ _cs = 1; /* Deasser the CS */
+
+ /* */
+ ts->x = ((unsigned int)TSValue[15]<<5) | (TSValue[16]>>3);
+ ts->y = ((unsigned int)TSValue[3]<<5) | (TSValue[4]>>3);
+ iZ2 = ((unsigned int)TSValue[11]<<5) | (TSValue[12]>>3);
+ iZ1 = ((unsigned int)TSValue[7]<<5) | (TSValue[8]>>3);
+ ts->z = (int)(330.0 * (((double)ts->x)/4096.0)*((((double)iZ2)/((double)iZ1))-1.0));
+
+ /* Reduce the value to 10bit */
+ ts->y = (ts->y >> MODE12);
+ ts->x = (ts->x >> MODE12);
+
+ idx++;
+ if ( ts->z < 10000 || idx>10)
+ break;
+ }
+}
+