/****************************************Copyright (c)****************************************************
**                                      
**                                 http://www.powermcu.com
**
**--------------File Info---------------------------------------------------------------------------------
** File name:               TouchPanel.h
** Descriptions:            The TouchPanel application function
**
**--------------------------------------------------------------------------------------------------------
** Created by:              AVRman
** Created date:            2010-11-7
** Version:                 v1.0
** Descriptions:            The original version
**
**--------------------------------------------------------------------------------------------------------
** Modified by:             
** Modified date:           
** Version:                 
** Descriptions:            
**
*********************************************************************************************************/

#ifndef _TOUCHPANEL_H_
#define _TOUCHPANEL_H_

/* Includes ------------------------------------------------------------------*/
#include "LPC17xx.h"

/* Private typedef -----------------------------------------------------------*/
typedef	struct POINT 
{
   uint16_t x;
   uint16_t y;
}Coordinate;


typedef struct Matrix 
{						long double An,              Bn,                 Cn,               Dn,                En,                Fn,                 Divider ;} Matrix ;

/* Private variables ---------------------------------------------------------*/
extern Coordinate ScreenSample[3];extern Coordinate DisplaySample[3];
extern Matrix matrix ;extern Coordinate  display ;

/* Private define ------------------------------------------------------------*/
/* AD通道選擇命令字和工作寄存器 */
#define	CHX 	        0x90 	/* 通道Y+的選擇控制字 */	
#define	CHY 	        0xd0	/* 通道X+的選擇控制字 */

#define SSPSR_RNE       2
#define SSPSR_BSY       4

/* bit-frequency = PCLK / CPSR */
#define SPI_SPEED_4MHz    18 	  /* 4MHz */
#define SPI_SPEED_2MHz    36 	  /* 2MHz */
#define SPI_SPEED_400kHz  180	  /* 400kHz */


#define TP_CS(a)	if (a)	\
					LPC_GPIO0->FIOSET = (1<<6);\
					else		\
					LPC_GPIO0->FIOCLR = (1<<6)

#define TP_INT_IN   ( LPC_GPIO2->FIOPIN & (1<<13) ) 

/* Private function prototypes -----------------------------------------------*/				
void TP_Init(void);	
Coordinate *Read_Ads7846(void);
void TouchPanel_Calibrate(void);
void DrawCross(uint16_t Xpos,uint16_t Ypos);
void TP_DrawPoint(uint16_t Xpos,uint16_t Ypos);
uint8_t setCalibrationMatrix( Coordinate * displayPtr,Coordinate * screenPtr,Matrix * matrixPtr);
uint8_t getDisplayPoint(Coordinate * displayPtr,Coordinate * screenPtr,Matrix * matrixPtr );

#endif

/*********************************************************************************************************
      END FILE
*********************************************************************************************************/