/* * Microwindows touch screen driver for ADS Graphics Client (www.flatpanels.com) * * Copyright (c) 2000 Century Software Embedded Technologies * * Requires /dev/ts kernel driver (char special 190,34) */#include <stdio.h>#include <stdlib.h>#include <unistd.h>#include <errno.h>#include <fcntl.h>#include <math.h>#include <sys/ioctl.h>#include "device.h"/* file descriptor for touch panel */static int pd_fd = -1;/* Hack extern to used when hiding the mouse cursor * There needs to be a better way to do this*/extern SCREENDEVICE scrdev;static int PD_Open(MOUSEDEVICE *pmd){ 	/*	 * open up the touch-panel device.	 * Return the fd if successful, or negative if unsuccessful.	 */	pd_fd = open("/dev/ts", O_NONBLOCK);	if (pd_fd < 0) {		EPRINTF("Error %d opening touch panel\n", errno);		return -1;	}	GdHideCursor(&scrdev);	return pd_fd;}static void PD_Close(void){ 	/* Close the touch panel device. */	EPRINTF("PD_Close called\n");	if (pd_fd >= 0)		close(pd_fd);	pd_fd = -1;}static int PD_GetButtonInfo(void){ 	/* get "mouse" buttons supported */	return MWBUTTON_L;}static void PD_GetDefaultAccel(int *pscale,int *pthresh){	/*	 * Get default mouse acceleration settings	 * This doesn't make sense for a touch panel.	 * Just return something inconspicuous for now.	 */	*pscale = 3;	*pthresh = 5;}static int PD_Read(MWCOORD *px, MWCOORD *py, MWCOORD *pz, int *pb){	/* read a data point */	short data[3];	int bytes_read;	bytes_read = read(pd_fd, data, sizeof(data));	if (bytes_read != sizeof(data)) {		if (errno == EINTR || errno == EAGAIN)			return 0;		/*		 * kernel driver bug: select returns read available,		 * but read returns -1		 * we return 0 here to avoid GsError above		 */		/*return -1;*/		return 0;	}	*px = (MWCOORD)data[0];	*py = (MWCOORD)data[1];	*pb = (data[2]>0?MWBUTTON_L:0);	*pz = 0;	if((*px == -1 || *py == -1) && *pb >= 0)		return 3;			/* only have button data */	else if((*px == -1 || *py == -1) && *pb < 0)		return 0;			/* don't have any data   */	else 		return 2;			/* have full set of data */}MOUSEDEVICE mousedev = {	PD_Open,	PD_Close,	PD_GetButtonInfo,	PD_GetDefaultAccel,	PD_Read,	NULL};#ifdef TESTint main(int argc, char ** v){	MWCOORD x, y, z;	int	b;	int result;	int mouse = -1;	DPRINTF("Opening touch panel...\n");	if((result=PD_Open(0)) < 0)		DPRINTF("Error %d, result %d opening touch-panel\n", errno, result);	/* This stuff below can be used to set some of the parameters of the	 * driver from the command line before going in to the test loop.	 * Could this have been done better? Yup.	 */	if(argc > 1) {		ioctl(result,1,atoi(v[1]));		DPRINTF("Setting pressure to %d\n",atoi(v[1]));	} 	if(argc > 2) {		ioctl(result,2,atoi(v[2]));		DPRINTF("Setting updelay to %d\n",atoi(v[2]));	}	if(argc > 3) {		ioctl(result,3,atoi(v[3]));		DPRINTF("Setting raw x to %d\n",atoi(v[3]));	}	if(argc > 4) {		ioctl(result,4,atoi(v[4]));		DPRINTF("Setting raw y to %d\n",atoi(v[4]));	} 	if(argc > 5) {		ioctl(result,5,atoi(v[5]));		DPRINTF("Setting res x to %d\n",atoi(v[5]));	}	if(argc > 6) {		ioctl(result,6,atoi(v[6]));		DPRINTF("Setting res y to %d\n",atoi(v[6]));	}	if(argc > 7) {		ioctl(result,7,atoi(v[7]));		DPRINTF("Setting fudge x to %d\n",atoi(v[7]));	}	if(argc > 8) {		ioctl(result,8,atoi(v[8]));		DPRINTF("Setting fudge y to %d\n",atoi(v[8]));	}	if(argc > 9) {		ioctl(result,9,atoi(v[9]));		DPRINTF("Setting average sample to %d\n",atoi(v[9]));	} 	if(argc > 10) {		ioctl(result,10,atoi(v[10]));		DPRINTF("Setting raw min x to %d\n",atoi(v[10]));	}	if(argc > 11) {		ioctl(result,11,atoi(v[11]));		DPRINTF("Setting raw min y to %d\n",atoi(v[11]));	} 	DPRINTF("Reading touch panel...\n");	while(1) {		result = PD_Read(&x, &y, &z, &b);		if( result > 0) {			if(mouse != b) {				mouse = b;				if(mouse) 					DPRINTF("Pen Down\n");				else					DPRINTF("Pen Up\n");			}			DPRINTF("%d,%d,%d,%d,%d\n", result, x, y, z, b);		}	}}#endif