//*****************************************************************************
//
// touch.h - Prototypes for the touch screen driver.
//
// Copyright (c) 2012-2015 Texas Instruments Incorporated.  All rights reserved.
// Software License Agreement
// 
// Texas Instruments (TI) is supplying this software for use solely and
// exclusively on TI's microcontroller products. The software is owned by
// TI and/or its suppliers, and is protected under applicable copyright
// laws. You may not combine this software with "viral" open-source
// software in order to form a larger program.
// 
// THIS SOFTWARE IS PROVIDED "AS IS" AND WITH ALL FAULTS.
// NO WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT
// NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. TI SHALL NOT, UNDER ANY
// CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
// DAMAGES, FOR ANY REASON WHATSOEVER.
// 
// This is part of revision 2.1.2.111 of the EK-TM4C1294XL Firmware Package.
//
//*****************************************************************************

#ifndef __TOUCH_H__
#define __TOUCH_H__

//*****************************************************************************
//
// The lowest ADC reading assumed to represent a press on the screen.  Readings
// below this indicate no press is taking place and are discarded.
//
//*****************************************************************************
#define TOUCH_MIN 200


//*****************************************************************************
//
// The GPIO pins and SDC channels to which the touch screen is connected.
//
//*****************************************************************************
#define TS_P_PERIPH             SYSCTL_PERIPH_GPIOE
#define TS_P_BASE               GPIO_PORTE_BASE					// Both XP and YP are on the same port

#define TS_XP_PIN               GPIO_PIN_1
#define TS_XP_ADC               ADC_CTL_CH2
#define TS_YP_PIN               GPIO_PIN_0
#define TS_YP_ADC               ADC_CTL_CH3
#define TS_XN_PERIPH            SYSCTL_PERIPH_GPIOL
#define TS_XN_BASE              GPIO_PORTL_BASE
#define TS_XN_PIN               GPIO_PIN_3
#define TS_YN_PERIPH            SYSCTL_PERIPH_GPIOP
#define TS_YN_BASE              GPIO_PORTP_BASE
#define TS_YN_PIN               GPIO_PIN_2




//*****************************************************************************
//
// Prototypes for the functions exported by the touch screen driver.
//
//*****************************************************************************
extern volatile int16_t g_i16TouchX;
extern volatile int16_t g_i16TouchY;
extern int16_t g_i16TouchMin;

extern void TouchScreenSetCalibrateMode( bool bCalMode );
extern void TouchScreenIntHandler(void);
extern void TouchScreenInit(uint32_t ui32SysClock);
extern void TouchScreenCallbackSet(int32_t (*pfnCallback)(uint32_t ui32Message,
                                                          int32_t i32X,
                                                          int32_t i32Y));

#endif // __TOUCH_H__
