MI0283QTlib - Library for MI0283QT-2 LCD

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Library for MI0283QT-2 LCD

Touchlib.c@0:7ad454fed160, 2012-05-23 (annotated)

Committer:: clemente
Date:: Wed May 23 06:25:31 2012 +0000
Revision:: 0:7ad454fed160

Who changed what in which revision?

User	Revision	Line number	New contents of line
clemente	0:7ad454fed160	1	/* mbed TouchScreen ADS7846 library.
clemente	0:7ad454fed160	2
clemente	0:7ad454fed160	3	Copyright (c) 2011 NXP 3803
clemente	0:7ad454fed160	4
clemente	0:7ad454fed160	5	Permission is hereby granted, free of charge, to any person obtaining a copy
clemente	0:7ad454fed160	6	of this software and associated documentation files (the "Software"), to deal
clemente	0:7ad454fed160	7	in the Software without restriction, including without limitation the rights
clemente	0:7ad454fed160	8	to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
clemente	0:7ad454fed160	9	copies of the Software, and to permit persons to whom the Software is
clemente	0:7ad454fed160	10	furnished to do so, subject to the following conditions:
clemente	0:7ad454fed160	11
clemente	0:7ad454fed160	12	The above copyright notice and this permission notice shall be included in
clemente	0:7ad454fed160	13	all copies or substantial portions of the Software.
clemente	0:7ad454fed160	14
clemente	0:7ad454fed160	15	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
clemente	0:7ad454fed160	16	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
clemente	0:7ad454fed160	17	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
clemente	0:7ad454fed160	18	AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
clemente	0:7ad454fed160	19	LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
clemente	0:7ad454fed160	20	OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
clemente	0:7ad454fed160	21	THE SOFTWARE.
clemente	0:7ad454fed160	22	*/
clemente	0:7ad454fed160	23
clemente	0:7ad454fed160	24	#include "mbed.h"
clemente	0:7ad454fed160	25	#include "string.h"
clemente	0:7ad454fed160	26	#include "Touchlib.h"
clemente	0:7ad454fed160	27	#include "calibrate.h"
clemente	0:7ad454fed160	28	#include "crocino.h"
clemente	0:7ad454fed160	29
clemente	0:7ad454fed160	30	/* */
clemente	0:7ad454fed160	31	unsigned char TSCmd[cTS_CMDSIZE] = {
clemente	0:7ad454fed160	32	cTS_GETY, 0x00, cTS_GETY, 0x00, /* y */
clemente	0:7ad454fed160	33	cTS_GETZ1, 0x00, cTS_GETZ1, 0x00, /* z1 */
clemente	0:7ad454fed160	34	cTS_GETZ2, 0x00, cTS_GETZ2, 0x00, /* z2 */
clemente	0:7ad454fed160	35	cTS_GETX, 0x00, cTS_END, 0x00, 0x00 /* x */
clemente	0:7ad454fed160	36	};
clemente	0:7ad454fed160	37
clemente	0:7ad454fed160	38	#define cTS_SAMPLE 8
clemente	0:7ad454fed160	39	#define MODE12 0
clemente	0:7ad454fed160	40
clemente	0:7ad454fed160	41	POINT crocino_coord[3] = {
clemente	0:7ad454fed160	42	{80,120},
clemente	0:7ad454fed160	43	{240,60},
clemente	0:7ad454fed160	44	{240,180}
clemente	0:7ad454fed160	45	};
clemente	0:7ad454fed160	46
clemente	0:7ad454fed160	47	MATRIX TS_Matrix;
clemente	0:7ad454fed160	48
clemente	0:7ad454fed160	49	unsigned char TSValue[cTS_CMDSIZE];
clemente	0:7ad454fed160	50	unsigned int tap_debounce;
clemente	0:7ad454fed160	51
clemente	0:7ad454fed160	52	DigitalOut TS_DBG_LED(LED4);
clemente	0:7ad454fed160	53
clemente	0:7ad454fed160	54	TOUCHS::TOUCHS( PinName mosi, PinName miso, PinName sclk, PinName cs, PinName penirq) : _spi( mosi, miso, sclk), _cs( cs), _penirq( penirq) {
clemente	0:7ad454fed160	55	// defaults params
clemente	0:7ad454fed160	56
clemente	0:7ad454fed160	57	}
clemente	0:7ad454fed160	58
clemente	0:7ad454fed160	59	unsigned int TOUCHS::setcalibration( _TS_COORD *ts)
clemente	0:7ad454fed160	60	{
clemente	0:7ad454fed160	61	POINT screen[3];
clemente	0:7ad454fed160	62	/* from struct TS_COORD to struct POINT. */
clemente	0:7ad454fed160	63	screen[0].x=ts[0].x;
clemente	0:7ad454fed160	64	screen[0].y=ts[0].y;
clemente	0:7ad454fed160	65	screen[1].x=ts[1].x;
clemente	0:7ad454fed160	66	screen[1].y=ts[1].y;
clemente	0:7ad454fed160	67	screen[2].x=ts[2].x;
clemente	0:7ad454fed160	68	screen[2].y=ts[2].y;
clemente	0:7ad454fed160	69	/* Now start the calibration process. */
clemente	0:7ad454fed160	70	ts_val.calibration_done=!setCalibrationMatrix( &crocino_coord[0], &screen[0], &TS_Matrix);
clemente	0:7ad454fed160	71	/* Return the result. */
clemente	0:7ad454fed160	72	return( ts_val.calibration_done);
clemente	0:7ad454fed160	73	}
clemente	0:7ad454fed160	74
clemente	0:7ad454fed160	75	unsigned int TOUCHS::calibrate( void)
clemente	0:7ad454fed160	76	{
clemente	0:7ad454fed160	77	POINT ts_tmp, coord;
clemente	0:7ad454fed160	78
clemente	0:7ad454fed160	79	coord.x=ts_val.coord.x;
clemente	0:7ad454fed160	80	coord.y=ts_val.coord.y;
clemente	0:7ad454fed160	81	// see calibrate.c
clemente	0:7ad454fed160	82	getDisplayPoint( &ts_tmp, &coord, &TS_Matrix);
clemente	0:7ad454fed160	83	//
clemente	0:7ad454fed160	84	ts_val.coord.x = ts_tmp.x;
clemente	0:7ad454fed160	85	ts_val.coord.y = ts_tmp.y;
clemente	0:7ad454fed160	86
clemente	0:7ad454fed160	87	return 0;
clemente	0:7ad454fed160	88	}
clemente	0:7ad454fed160	89
clemente	0:7ad454fed160	90	unsigned int TOUCHS::crocino_size( void)
clemente	0:7ad454fed160	91	{
clemente	0:7ad454fed160	92	return( cTS_CROCINO);
clemente	0:7ad454fed160	93	}
clemente	0:7ad454fed160	94
clemente	0:7ad454fed160	95	unsigned int TOUCHS::getcrocino_x( unsigned char idx)
clemente	0:7ad454fed160	96	{
clemente	0:7ad454fed160	97	if ( idx > 3)
clemente	0:7ad454fed160	98	idx=3;
clemente	0:7ad454fed160	99
clemente	0:7ad454fed160	100	return ( crocino_coord[idx].x);
clemente	0:7ad454fed160	101	}
clemente	0:7ad454fed160	102
clemente	0:7ad454fed160	103	unsigned int TOUCHS::getcrocino_y( unsigned char idx)
clemente	0:7ad454fed160	104	{
clemente	0:7ad454fed160	105	if ( idx > 3)
clemente	0:7ad454fed160	106	idx=3;
clemente	0:7ad454fed160	107
clemente	0:7ad454fed160	108	return ( crocino_coord[idx].y);
clemente	0:7ad454fed160	109	}
clemente	0:7ad454fed160	110
clemente	0:7ad454fed160	111	unsigned int TOUCHS::gettsmatrixsize( void)
clemente	0:7ad454fed160	112	{
clemente	0:7ad454fed160	113	return( sizeof( TS_Matrix));
clemente	0:7ad454fed160	114	}
clemente	0:7ad454fed160	115
clemente	0:7ad454fed160	116	void TOUCHS::gettsmatrix( unsigned char *pmatrix)
clemente	0:7ad454fed160	117	{
clemente	0:7ad454fed160	118
clemente	0:7ad454fed160	119	pmatrix++=((unsigned char)&TS_Matrix.An)[0];
clemente	0:7ad454fed160	120	pmatrix++=((unsigned char)&TS_Matrix.An)[1];
clemente	0:7ad454fed160	121	pmatrix++=((unsigned char)&TS_Matrix.An)[2];
clemente	0:7ad454fed160	122	pmatrix++=((unsigned char)&TS_Matrix.An)[3];
clemente	0:7ad454fed160	123	pmatrix++=((unsigned char)&TS_Matrix.Bn)[0];
clemente	0:7ad454fed160	124	pmatrix++=((unsigned char)&TS_Matrix.Bn)[1];
clemente	0:7ad454fed160	125	pmatrix++=((unsigned char)&TS_Matrix.Bn)[2];
clemente	0:7ad454fed160	126	pmatrix++=((unsigned char)&TS_Matrix.Bn)[3];
clemente	0:7ad454fed160	127	pmatrix++=((unsigned char)&TS_Matrix.Cn)[0];
clemente	0:7ad454fed160	128	pmatrix++=((unsigned char)&TS_Matrix.Cn)[1];
clemente	0:7ad454fed160	129	pmatrix++=((unsigned char)&TS_Matrix.Cn)[2];
clemente	0:7ad454fed160	130	pmatrix++=((unsigned char)&TS_Matrix.Cn)[3];
clemente	0:7ad454fed160	131	pmatrix++=((unsigned char)&TS_Matrix.Dn)[0];
clemente	0:7ad454fed160	132	pmatrix++=((unsigned char)&TS_Matrix.Dn)[1];
clemente	0:7ad454fed160	133	pmatrix++=((unsigned char)&TS_Matrix.Dn)[2];
clemente	0:7ad454fed160	134	pmatrix++=((unsigned char)&TS_Matrix.Dn)[3];
clemente	0:7ad454fed160	135	pmatrix++=((unsigned char)&TS_Matrix.En)[0];
clemente	0:7ad454fed160	136	pmatrix++=((unsigned char)&TS_Matrix.En)[1];
clemente	0:7ad454fed160	137	pmatrix++=((unsigned char)&TS_Matrix.En)[2];
clemente	0:7ad454fed160	138	pmatrix++=((unsigned char)&TS_Matrix.En)[3];
clemente	0:7ad454fed160	139	pmatrix++=((unsigned char)&TS_Matrix.Fn)[0];
clemente	0:7ad454fed160	140	pmatrix++=((unsigned char)&TS_Matrix.Fn)[1];
clemente	0:7ad454fed160	141	pmatrix++=((unsigned char)&TS_Matrix.Fn)[2];
clemente	0:7ad454fed160	142	pmatrix++=((unsigned char)&TS_Matrix.Fn)[3];
clemente	0:7ad454fed160	143	pmatrix++=((unsigned char)&TS_Matrix.Divider)[0];
clemente	0:7ad454fed160	144	pmatrix++=((unsigned char)&TS_Matrix.Divider)[1];
clemente	0:7ad454fed160	145	pmatrix++=((unsigned char)&TS_Matrix.Divider)[2];
clemente	0:7ad454fed160	146	pmatrix++=((unsigned char)&TS_Matrix.Divider)[3];
clemente	0:7ad454fed160	147
clemente	0:7ad454fed160	148	}
clemente	0:7ad454fed160	149
clemente	0:7ad454fed160	150	void TOUCHS::settsmatrix( unsigned char *pmatrix)
clemente	0:7ad454fed160	151	{
clemente	0:7ad454fed160	152
clemente	0:7ad454fed160	153	((unsigned char)&TS_Matrix.An)[0]=pmatrix++;
clemente	0:7ad454fed160	154	((unsigned char)&TS_Matrix.An)[1]=pmatrix++;
clemente	0:7ad454fed160	155	((unsigned char)&TS_Matrix.An)[2]=pmatrix++;
clemente	0:7ad454fed160	156	((unsigned char)&TS_Matrix.An)[3]=pmatrix++;
clemente	0:7ad454fed160	157	((unsigned char)&TS_Matrix.Bn)[0]=pmatrix++;
clemente	0:7ad454fed160	158	((unsigned char)&TS_Matrix.Bn)[1]=pmatrix++;
clemente	0:7ad454fed160	159	((unsigned char)&TS_Matrix.Bn)[2]=pmatrix++;
clemente	0:7ad454fed160	160	((unsigned char)&TS_Matrix.Bn)[3]=pmatrix++;
clemente	0:7ad454fed160	161	((unsigned char)&TS_Matrix.Cn)[0]=pmatrix++;
clemente	0:7ad454fed160	162	((unsigned char)&TS_Matrix.Cn)[1]=pmatrix++;
clemente	0:7ad454fed160	163	((unsigned char)&TS_Matrix.Cn)[2]=pmatrix++;
clemente	0:7ad454fed160	164	((unsigned char)&TS_Matrix.Cn)[3]=pmatrix++;
clemente	0:7ad454fed160	165	((unsigned char)&TS_Matrix.Dn)[0]=pmatrix++;
clemente	0:7ad454fed160	166	((unsigned char)&TS_Matrix.Dn)[1]=pmatrix++;
clemente	0:7ad454fed160	167	((unsigned char)&TS_Matrix.Dn)[2]=pmatrix++;
clemente	0:7ad454fed160	168	((unsigned char)&TS_Matrix.Dn)[3]=pmatrix++;
clemente	0:7ad454fed160	169	((unsigned char)&TS_Matrix.En)[0]=pmatrix++;
clemente	0:7ad454fed160	170	((unsigned char)&TS_Matrix.En)[1]=pmatrix++;
clemente	0:7ad454fed160	171	((unsigned char)&TS_Matrix.En)[2]=pmatrix++;
clemente	0:7ad454fed160	172	((unsigned char)&TS_Matrix.En)[3]=pmatrix++;
clemente	0:7ad454fed160	173	((unsigned char)&TS_Matrix.Fn)[0]=pmatrix++;
clemente	0:7ad454fed160	174	((unsigned char)&TS_Matrix.Fn)[1]=pmatrix++;
clemente	0:7ad454fed160	175	((unsigned char)&TS_Matrix.Fn)[2]=pmatrix++;
clemente	0:7ad454fed160	176	((unsigned char)&TS_Matrix.Fn)[3]=pmatrix++;
clemente	0:7ad454fed160	177	((unsigned char)&TS_Matrix.Divider)[0]=pmatrix++;
clemente	0:7ad454fed160	178	((unsigned char)&TS_Matrix.Divider)[1]=pmatrix++;
clemente	0:7ad454fed160	179	((unsigned char)&TS_Matrix.Divider)[2]=pmatrix++;
clemente	0:7ad454fed160	180	((unsigned char)&TS_Matrix.Divider)[3]=pmatrix++;
clemente	0:7ad454fed160	181
clemente	0:7ad454fed160	182	ts_val.calibration_done=1;
clemente	0:7ad454fed160	183
clemente	0:7ad454fed160	184	}
clemente	0:7ad454fed160	185
clemente	0:7ad454fed160	186	void TOUCHS::init( void)
clemente	0:7ad454fed160	187	{
clemente	0:7ad454fed160	188	_spi.format( 8, BUS_MODE);
clemente	0:7ad454fed160	189	_spi.frequency( TS_SPEED);
clemente	0:7ad454fed160	190
clemente	0:7ad454fed160	191	}
clemente	0:7ad454fed160	192
clemente	0:7ad454fed160	193
clemente	0:7ad454fed160	194	void TOUCHS::do_tap( void)
clemente	0:7ad454fed160	195	{
clemente	0:7ad454fed160	196	unsigned int i, x, y;
clemente	0:7ad454fed160	197
clemente	0:7ad454fed160	198	if ( TOUCHS::pressure() && ts_val.touched==0) {
clemente	0:7ad454fed160	199	printf("press: %d\r\n", tap_debounce );
clemente	0:7ad454fed160	200	tap_debounce++;
clemente	0:7ad454fed160	201	if ( tap_debounce>= cTS_DEBOUNCE) {
clemente	0:7ad454fed160	202	tap_debounce=0;
clemente	0:7ad454fed160	203	ts_val.touched=1;
clemente	0:7ad454fed160	204	for ( i=4, x=0,y=0; i!=0; i--) {
clemente	0:7ad454fed160	205	TOUCHS::read( &ts_val.coord);
clemente	0:7ad454fed160	206	x+=ts_val.coord.x;
clemente	0:7ad454fed160	207	y+=ts_val.coord.y;
clemente	0:7ad454fed160	208	}
clemente	0:7ad454fed160	209	ts_val.coord.x=x>>2;
clemente	0:7ad454fed160	210	ts_val.coord.y=y>>2;
clemente	0:7ad454fed160	211	// If the calibration process was successful complited...
clemente	0:7ad454fed160	212	if ( ts_val.calibration_done) {
clemente	0:7ad454fed160	213	// ...run the convertion from touch to screen coord.
clemente	0:7ad454fed160	214	TOUCHS::calibrate();
clemente	0:7ad454fed160	215	}
clemente	0:7ad454fed160	216	}
clemente	0:7ad454fed160	217	}
clemente	0:7ad454fed160	218	}
clemente	0:7ad454fed160	219
clemente	0:7ad454fed160	220	unsigned int TOUCHS::pressure( void)
clemente	0:7ad454fed160	221	{
clemente	0:7ad454fed160	222	unsigned char pressure;
clemente	0:7ad454fed160	223	unsigned char iZ2, iZ1;
clemente	0:7ad454fed160	224
clemente	0:7ad454fed160	225	_spi.frequency( TS_SPEED);
clemente	0:7ad454fed160	226
clemente	0:7ad454fed160	227	_cs = 0; /* Seleziono il CS del TS */
clemente	0:7ad454fed160	228
clemente	0:7ad454fed160	229	_spi.write( 0xB0);
clemente	0:7ad454fed160	230	iZ1 = _spi.write( 0x00);
clemente	0:7ad454fed160	231	//
clemente	0:7ad454fed160	232	_spi.write( 0xC0);
clemente	0:7ad454fed160	233	iZ2 = 127-_spi.write( 0x00);
clemente	0:7ad454fed160	234	_cs = 1; /* De-Seleziono il CS del TS */
clemente	0:7ad454fed160	235
clemente	0:7ad454fed160	236	pressure=iZ1+iZ2;
clemente	0:7ad454fed160	237
clemente	0:7ad454fed160	238	if ( pressure > 3) {
clemente	0:7ad454fed160	239	// ts_val.touched=1;
clemente	0:7ad454fed160	240	return( 1);
clemente	0:7ad454fed160	241	} else {
clemente	0:7ad454fed160	242	// ts_val.touched=0;
clemente	0:7ad454fed160	243	return( 0);
clemente	0:7ad454fed160	244	}
clemente	0:7ad454fed160	245
clemente	0:7ad454fed160	246	}
clemente	0:7ad454fed160	247
clemente	0:7ad454fed160	248	/* Read the value from the touch. Write the raw value inside the struct TS_COORD. */
clemente	0:7ad454fed160	249	void TOUCHS::read( _TS_COORD *ts)
clemente	0:7ad454fed160	250	{
clemente	0:7ad454fed160	251	unsigned int i, idx;
clemente	0:7ad454fed160	252	unsigned int iZ1, iZ2;
clemente	0:7ad454fed160	253
clemente	0:7ad454fed160	254	_spi.frequency( TS_SPEED);
clemente	0:7ad454fed160	255
clemente	0:7ad454fed160	256	idx=0;
clemente	0:7ad454fed160	257	while( 1) {
clemente	0:7ad454fed160	258	//
clemente	0:7ad454fed160	259	i=0;
clemente	0:7ad454fed160	260	_cs = 0; /* Assert the CS */
clemente	0:7ad454fed160	261
clemente	0:7ad454fed160	262	while ( i<cTS_CMDSIZE) {
clemente	0:7ad454fed160	263	TSValue[i] = _spi.write( TSCmd[i]);
clemente	0:7ad454fed160	264	/* */
clemente	0:7ad454fed160	265	i++;
clemente	0:7ad454fed160	266	}
clemente	0:7ad454fed160	267
clemente	0:7ad454fed160	268	_cs = 1; /* Deasser the CS */
clemente	0:7ad454fed160	269
clemente	0:7ad454fed160	270	/* */
clemente	0:7ad454fed160	271	ts->x = ((unsigned int)TSValue[15]<<5) \| (TSValue[16]>>3);
clemente	0:7ad454fed160	272	ts->y = ((unsigned int)TSValue[3]<<5) \| (TSValue[4]>>3);
clemente	0:7ad454fed160	273	iZ2 = ((unsigned int)TSValue[11]<<5) \| (TSValue[12]>>3);
clemente	0:7ad454fed160	274	iZ1 = ((unsigned int)TSValue[7]<<5) \| (TSValue[8]>>3);
clemente	0:7ad454fed160	275	ts->z = (int)(330.0 * (((double)ts->x)/4096.0)*((((double)iZ2)/((double)iZ1))-1.0));
clemente	0:7ad454fed160	276
clemente	0:7ad454fed160	277	/* Reduce the value to 10bit */
clemente	0:7ad454fed160	278	ts->y = (ts->y >> MODE12);
clemente	0:7ad454fed160	279	ts->x = (ts->x >> MODE12);
clemente	0:7ad454fed160	280
clemente	0:7ad454fed160	281	idx++;
clemente	0:7ad454fed160	282	if ( ts->z < 10000 \|\| idx>10)
clemente	0:7ad454fed160	283	break;
clemente	0:7ad454fed160	284	}
clemente	0:7ad454fed160	285	}
clemente	0:7ad454fed160	286

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Type:	Library
Created:	23 May 2012
Imports:	46
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	0
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Touchlib.c@0:7ad454fed160, 2012-05-23 (annotated)

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