source: umon/ports/csb740/ad7843.h @ b987a75

//==========================================================================
//
// ad7843.h
//
// Author(s):    Michael Kelly, Cogent Computer Systems, Inc.
// Contributors: 
// Date:         03/06/03
// Description:  This file contains register offsets and bit defines
//                               for the Analog Devices AD7843 Touch Screen Controller
//

//
// Bit positions for AD7843 Control byte
//
#define AD7843_S                        0x80        // Start bit, always 1
#define AD7843_8BIT                     0x08        // 0 = 12-bit conversion, 1 = 8-bits
#define AD7843_SER                      0x04        // 0 = Differential, 1 = Single ended

// Address select defines for Single-Ended mode
#define AD7843_ADD_SER_Y        (AD7843_SER | (0x1 << 4))       // Y position measurement
#define AD7843_ADD_SER_IN3      (AD7843_SER | (0x2 << 4))       // auxillary input 1 measurement
#define AD7843_ADD_SER_X        (AD7843_SER | (0x5 << 4))       // X position measurement
#define AD7843_ADD_SER_IN4      (AD7843_SER | (0x6 << 4))       // auxillary input 2 measurement

// Address select defines for Differential mode
#define AD7843_ADD_DFR_Y                (0x1 << 4)      // Y position measurement
#define AD7843_ADD_DFR_X                (0x5 << 4)      // X position measurement

// Power Down Modes
#define AD7843_PD_MOD0          0x0                     // low-power mode, no power-up delay, *IRQ is enabled
#define AD7843_PD_MOD1          0x1                     // same as low-power mode, except *IRQ is disabled
#define AD7843_PD_MOD2          0x2                     // device on, *IRQ is enabled
#define AD7843_PD_MOD3          0x3                     // device on, *IRQ is disabled

//#define AD7843_GPIOMODE