am9513.h

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/*
    module/am9513.h
    value added preprocessor definitions for Am9513 timer chip

    COMEDI - Linux Control and Measurement Device Interface
    Copyright (C) 1998 David A. Schleef <[email protected]>

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#ifndef _AM9513_H_
#define _AM9513_H_

#if 0

/*
 *  Before including this file, the following need to be defined:
 */
#define Am9513_8BITBUS xxx
/* or */
#define Am9513_16BITBUS xxx

#define Am9513_output_control(a)    xxx
#define Am9513_input_status()       xxx
#define Am9513_output_data(a)       xxx
#define Am9513_input_data()     xxx

#endif

/*
 *
 */

#ifdef Am9513_8BITBUS

#define Am9513_write_register(reg, val)             \
    do {                            \
        Am9513_output_control(reg);         \
        Am9513_output_data(val>>8);         \
        Am9513_output_data(val&0xff);           \
    } while (0)

#define Am9513_read_register(reg, val)              \
    do {                            \
        Am9513_output_control(reg);         \
        val = Am9513_input_data()<<8;           \
        val |= Am9513_input_data();         \
    } while (0)

#else /* Am9513_16BITBUS */

#define Am9513_write_register(reg, val)             \
    do {                            \
        Am9513_output_control(reg);         \
        Am9513_output_data(val);            \
    } while (0)

#define Am9513_read_register(reg, val)              \
    do {                            \
        Am9513_output_control(reg);         \
        val = Am9513_input_data();          \
    } while (0)

#endif

#endif