touchscr.h

Cirrus Logic EP7312处理器部分控制程序。

//************************************************************************
//
// TOUCHSCR.H - include file for ADS7846E touch screen interface
//
// Copyright (c) 2001 Cogent Computer Systems, Inc.
//
//************************************************************************

//
// Bit positions for ADS7846E Control byte
//
#define ADS7846E_S			0x80	     // Start bit, always 1
#define ADS7846E_ADD 			0x70	     // Input Channel Address
#define ADS7846E_ADD_SHIFT		4
#define ADS7846E_8BIT			0x08	     // 0 = 12-bit conversion, 1 = 8-bits
#define ADS7846E_SER			0x04	     // 0 = Differential, 1 = Single ended
#define ADS7846E_PD			0x03	     // Power-Down modes
#define ADS7846E_PD_SHIFT		0	

//
// Address select defines for single ended mode
//
#define ADS7846E_ADD_SER_TEMP0	0x0		// temperature measurement 1
#define ADS7846E_ADD_SER_Y		0x1		// Y position measurement
#define ADS7846E_ADD_SER_BAT	      0x2		// battery input measurement
#define ADS7846E_ADD_SER_Z1		0x3		// pressure measurement 1
#define ADS7846E_ADD_SER_Z2		0x4		// pressure measurement 2
#define ADS7846E_ADD_SER_X		0x5		// X position measurement
#define ADS7846E_ADD_SER_AUX	      0x6		// auxillary input measurement
#define ADS7846E_ADD_SER_TEMP1	0x7		// temperature measurement 2

//
// Address select defines for differential mode
//
#define ADS7846E_ADD_DFR_Y		0x1		// Y position measurement
#define ADS7846E_ADD_DFR_Z1		0x3		// pressure measurement 1
#define ADS7846E_ADD_DFR_Z2		0x4		// pressure measurement 2
#define ADS7846E_ADD_DFR_X		0x5		// X position measurement


//
// Power Down Modes
//
#define ADS7846E_PD_LPWR		0x0		// low-power mode, no power-up delay, *IRQ is enabled
#define ADS7846E_PD_REF			0x1		// 2.5V reference off, ADC on, requires delay before conversion
#define ADS7846E_PD_ADC			0x2		// ADC off, REF on, no delay required
#define ADS7846E_PD_IRQ			0x3		// device on, but *IRQ is disabled