gui_mouse_driverps2.c

MCB2300_ucgui_LCD320240.rar LPC2368的uc/gui的移植

/*
*********************************************************************************************************
*   											 uC/GUI
*   					 Universal graphic software for embedded applications
*
*   					(c) Copyright 2002, Micrium Inc., Weston, FL
*   					(c) Copyright 2002, SEGGER Microcontroller Systeme GmbH
*
*   		   礐/GUI is protected by international copyright laws. Knowledge of the
*   		   source code may not be used to write a similar product. This file may
*   		   only be used in accordance with a license and should not be redistributed
*   		   in any way. We appreciate your understanding and fairness.
*
----------------------------------------------------------------------
File		: GUITOUCH.C
Purpose 	: Touch screen manager
----------------------------------------------------------------------
This module handles the touch screen. It is configured in the file
GUITouch.conf.h (Should be located in the Config\ directory).
----------------------------------------------------------------------
*/

#include "LCD_Private.h"	  /* private modul definitions & config */
#include "GUI_Protected.h"

/*********************************************************************
*
*   	Static data
*
**********************************************************************
*/

static int  _ScreenX = 0;    /* x-pos   		   */
static int  _ScreenY = 0;    /* y-pos   		   */
static int  _NumBytesInBuffer = 0;    /* bytes in rx buffer */
static U8   _Buttons = 0;    /* button status      */
static U8   _abInBuffer[3]; 			  /* mouse rx buffer	*/

/*********************************************************************
*
*   	Static code
*
**********************************************************************
*/
/*********************************************************************
*
*   	_EvaPacket
*
* Purpose:
*   Process data packet from mouse:
*
*   		  | D7    D6	D5    D4	D3    D2	D1    D0
*   ----------+----------------------------------------------
*   1st byte  | --    --	Y-    X-	 1    --	LB    RB
*   2nd byte  | X7    X6	X5    X4	X3    X2	X1    X0
*   3rd byte  | Y7    Y6	Y5    Y4	Y3    Y2	Y1    Y0
*/
static void _EvaPacket(void)
{
	char a;
	GUI_PID_STATE State;
	_Buttons = _abInBuffer[0] & 0x03;
	a = _abInBuffer[1];
	/* test x move sign. */
	if (_abInBuffer[0] & 0x10)
	{
		a = -a;
		_ScreenX -= a;
	}   	 /* direction is negative, move left */
	else
	{
		_ScreenX += a;
	}
	a = _abInBuffer[2];
	/* test y move sign. */
	if (_abInBuffer[0] & 0x20)
	{
		a = -a;
		_ScreenY += a;
	}  /* direction is negative, move down */ else
	{
		_ScreenY -= a;
	}
	/* check min/max positions */    
	if (_ScreenX < 0)
	{
		_ScreenX = 0;
	}
	else if (_ScreenX > LCD_XSIZE - 1)
	{
		_ScreenX = LCD_XSIZE - 1;
	} if (_ScreenY < 0)
	{
		  _ScreenY = 0;
	}
	else if (_ScreenY > LCD_YSIZE - 1)
	  {
		  _ScreenY = LCD_YSIZE - 1;
	  }
	/* signal new mouse data */
	State.x = _ScreenX;
	State.y = _ScreenY;
	State.Pressed = _Buttons;
	GUI_MOUSE_StoreState(&State);
}

/*********************************************************************
*
*   	Public code
*
**********************************************************************
*/
/*********************************************************************
*
*   	GUI_MOUSE_DRIVER_PS2_OnRx
*
* Purpose:
*   Mouse receive interrupt handler. The PS2 mouse interrupt gets
*   in three bytes from the mouse, then wakes up the mouse LSR.
*/
void GUI_MOUSE_DRIVER_PS2_OnRx(unsigned char Data)
{
	if (!_NumBytesInBuffer)
	{
		/* check for start frame */
		if ((Data & 0x0c) == 0x08)
		{
			_abInBuffer[0] = Data;
			_NumBytesInBuffer++;
		}
	}
	else
	{
		_abInBuffer[_NumBytesInBuffer] = Data;
		_NumBytesInBuffer++;
		if (_NumBytesInBuffer >= 3)
		{
			_EvaPacket();
			_NumBytesInBuffer = 0;
		}
	}
}

/*********************************************************************
*
*   	GUI_MOUSE_DRIVER_PS2_Init
*/
void GUI_MOUSE_DRIVER_PS2_Init(void)
{
	_NumBytesInBuffer = 0;
}

/*************************** End of file ****************************/