///////////////////////////////////////////////////////////////////////////////////////////////*																						  *////*      This is a serial mouse driver for eCos, writen by lihui<lhbyron@hotmail.com>     *////*                                                                                       *////*      The default setting is set mouse on com2("/dev/ser1"), and  mouse type is MS     *////*																						  *///////////////////////////////////////////////////////////////////////////////////////////////#include <stdio.h>#include <pkgconf/system.h>#include <pkgconf/io_serial.h>#include <pkgconf/io.h>#include <cyg/io/serialio.h>#include <cyg/io/io.h>#include <cyg/hal/hal_intr.h>#include <cyg/io/devtab.h>#include <cyg/io/serial.h>#include <cyg/infra/diag.h>#include <cyg/infra/cyg_ass.h>#include <cyg/hal/hal_io.h>#include <pkgconf/io_serial.h>#define MAX_BYTES	128		/* number of bytes for buffer */#define	SCALE		3	/* default scaling factor for acceleration */#define	THRESH		5	/* default threshhold for acceleration *//* states for the mouse*/#define	IDLE			0		/* start of byte sequence */#define	XSET			1		/* setting x delta */#define	YSET			2		/* setting y delta */#define	XADD			3		/* adjusting x delta */#define	YADD			4		/* adjusting y delta *//* values in the bytes returned by the mouse for the buttons*/#define	MS_LEFT_BUTTON		2#define MS_RIGHT_BUTTON		1/* Bit fields in the bytes sent by the mouse.*/#define TOP_FIVE_BITS		0xf8#define BOTTOM_THREE_BITS	0x07#define TOP_BIT			0x80#define SIXTH_BIT		0x40#define BOTTOM_TWO_BITS		0x03#define THIRD_FOURTH_BITS	0x0c#define BOTTOM_SIX_BITS  	0x3f/* Mouse button bits*/#define MWBUTTON_L	04#define MWBUTTON_M	02#define MWBUTTON_R 01/* Mouse Port */#define PORT  "/dev/ser1"static int		state;		/* IDLE, XSET, ... */static int		buttons;	/* current mouse buttons pressed*/static int		availbuttons;	/* which buttons are available */static long		xd;		/* change in x */static long		yd;		/* change in y */static int		left;		/* because the button values change */static int		middle;		/* between mice, the buttons are */static int		right;		/* redefined */static unsigned char	*bp;		/* buffer pointer */static int		nbytes;		/* number of bytes left */static unsigned char	buffer[MAX_BYTES];	/* data bytes read */Cyg_ErrNo error;		/* error output*/cyg_io_handle_t handle;		/* mouse device handle */cyg_serial_info_t info;		/* serial port config info */cyg_uint32 len;				/* data length *///unsigned char buf[6];		//cyg_uint32 iBlock=1;		/* Set NonBlocking mode *//* local routines*/static cyg_io_handle_t  	MOU_Open();static void 	MOU_Close(void);static int  	MOU_GetButtonInfo(void);static void		MOU_GetDefaultAccel(int *pscale,int *pthresh);static int  	MOU_Read(long *dx, long *dy, long *dz, int *bptr);static int  	ParseMS(int);		/* routine to interpret MS mouse *//* * Open up the mouse device. * Returns the fd if successful, or negative if unsuccessful. */static cyg_io_handle_tMOU_Open(){	char	*type;	char	*port;		/* microsoft mouse*/	left = MS_LEFT_BUTTON;	right = MS_RIGHT_BUTTON;	middle = 0;		/* eCos mouse open */	error=cyg_io_lookup(PORT, &handle);	len=sizeof(info);	/* set serial port configuration */	error=cyg_io_get_config(handle,CYG_IO_GET_CONFIG_SERIAL_INFO,&info,&len);	info.baud=CYGNUM_SERIAL_BAUD_1200;	info.stop=CYGNUM_SERIAL_STOP_1;	info.word_length=CYGNUM_SERIAL_WORD_LENGTH_8;	error=cyg_io_set_config(handle,CYG_IO_SET_CONFIG_SERIAL_INFO, &info, &len);		/* set nonblocking mode */	//len=sizeof(cyg_uint32);	//error=cyg_io_set_config(handle,CYG_IO_SET_CONFIG_SERIAL_READ_BLOCKING,&iBlock,&len);		if (error < 0) {		printf("Error %d opening serial mouse type %s on port %s.\n",			errno, type, port); 		return -1;	}	/* initialize data*/	availbuttons = left | middle | right;	state = IDLE;	nbytes = 0;	buttons = 0;	xd = 0;	yd = 0;	return handle;err:	//close(mouse_fd);	handle = 0;	return -1;}/* * Close the mouse device. */static voidMOU_Close(void){	if (handle > 0) {		//close(mouse_fd);	}	handle = 0;}/* * Get mouse buttons supported */static intMOU_GetButtonInfo(void){	return availbuttons;}/* * Get default mouse acceleration settings */static voidMOU_GetDefaultAccel(int *pscale,int *pthresh){	*pscale = SCALE;	*pthresh = THRESH;}/* * Attempt to read bytes from the mouse and interpret them. * Returns -1 on error, 0 if either no bytes were read or not enough * was read for a complete state, or 1 if the new state was read. * When a new state is read, the current buttons and x and y deltas * are returned.  This routine does not block. */static intMOU_Read(long *dx, long *dy, long *dz, int *bptr){	int	b;	cyg_uint32 tmp;	/*	 * If there are no more bytes left, then read some more,	 * waiting for them to arrive.  On a signal or a non-blocking	 * error, return saying there is no new state available yet.	 */	if (nbytes <= 0) {		bp = buffer;		tmp=3;		error = cyg_io_read(handle, bp, &tmp);		nbytes=tmp;		if (nbytes < 0) {			if (error == EINTR || error == EAGAIN)				return 0;		}	}	/*	 * Loop over all the bytes read in the buffer, parsing them.	 * When a complete state has been read, return the results,	 * leaving further bytes in the buffer for later calls.	 */	while (nbytes-- > 0) {		if (ParseMS((int) *bp++)) {			*dx = xd;			*dy = yd;			*dz = 0;			b = 0;			if(buttons & left)				b |= MWBUTTON_L;			if(buttons & right)				b |= MWBUTTON_R;			if(buttons & middle)				b |= MWBUTTON_M;			*bptr = b;			return 1;		}	}	return 0;}/* * Input routine for Microsoft mouse. * Returns nonzero when a new mouse state has been completed. */static intParseMS(int byte){	switch (state) {		case IDLE:			if (byte & SIXTH_BIT) {				buttons = (byte >> 4) & BOTTOM_TWO_BITS;				yd = ((byte & THIRD_FOURTH_BITS) << 4);				xd = ((byte & BOTTOM_TWO_BITS) << 6);				state = XADD;			}			break;		case XADD:			xd |= (byte & BOTTOM_SIX_BITS);			state = YADD;			break;		case YADD:			yd |= (byte & BOTTOM_SIX_BITS);			state = IDLE;			if (xd > 127)				xd -= 256;			if (yd > 127)				yd -= 256;			return 1;	}	return 0;}int main(){	long x, y, z;	int	b;	printf("Open Mouse\n");	if( MOU_Open(0) < 0)		printf("open failed mouse\n" );	while(1) 	{		if(MOU_Read(&x, &y, &z, &b) == 1) 		{	     		printf("%d,%d,%d\n", x, y, b);		}	}			return 0;}