devs_wallclock_h8s_edosk2674.inl

ecos移植到R8H系列的源码。源码包来自http://www.cetoni.de/develop/develop_ecosh8s_en.html

//==========================================================================
//
//      devs/wallclock/h8s/edosk2674/include/devs_wallclock_h8s_edosk2674.inl
//
//      EDOSK2674 RTC IO definitions
//
//==========================================================================
//####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
// Copyright (C) 2003 Gary Thomas
//
// eCos 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 or (at your option) any later version.
//
// eCos 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 eCos; if not, write to the Free Software Foundation, Inc.,
// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
//
// As a special exception, if other files instantiate templates or use macros
// or inline functions from this file, or you compile this file and link it
// with other works to produce a work based on this file, this file does not
// by itself cause the resulting work to be covered by the GNU General Public
// License. However the source code for this file must still be made available
// in accordance with section (3) of the GNU General Public License.
//
// This exception does not invalidate any other reasons why a work based on
// this file might be covered by the GNU General Public License.
//
// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
// at http://sources.redhat.com/ecos/ecos-license/
// -------------------------------------------
//####ECOSGPLCOPYRIGHTEND####
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):   Uwe Kindler
// Contributors:Uwe Kindler
// Date:        2003-11-26
// Purpose:     EDOSK2674 RTC definitions for using DS1672
//####DESCRIPTIONEND####
//==========================================================================


//==========================================================================
//                                INCLUDES
//==========================================================================
//
// we can use the definitions in the generic Dallas 1672 driver header file
// ds1672.h because this file is included after the ds1672 header file
//


//==========================================================================
//                              CROSS REFERENCES
//==========================================================================
externC void      i2c_start(void);
externC void      i2c_stop(void);
externC void      i2c_byte_wr(cyg_uint8 data);
externC cyg_uint8 i2c_byte_rd(cyg_uint8 ackn);


//===========================================================================
//                      READ WHOLE DS1672 REGISTER SET
// DESCRIPTTION:
//     Reads complete DS1672 register set an fills buffer
//
// ARGUMENTS:
//     'regs'   Points to buffer
//===========================================================================
static __inline__ void DS_GET(cyg_uint8 *regs)
{
    //
    // set register pointer to first DS1672 register
    //
    i2c_start();
    i2c_byte_wr(I2C_DS1672_ADDR | I2C_WRITE);
    i2c_byte_wr(DS_REG_FIRST);
    //
    // now read the whole register set
    //
    i2c_start();
    i2c_byte_wr(I2C_DS1672_ADDR | I2C_READ);
    regs[0] = i2c_byte_rd(I2C_ACK);
    regs[1] = i2c_byte_rd(I2C_ACK);
    regs[2] = i2c_byte_rd(I2C_ACK);
    regs[3] = i2c_byte_rd(I2C_ACK);
    regs[4] = i2c_byte_rd(I2C_ACK);
    regs[5] = i2c_byte_rd(I2C_NACK);
    i2c_stop();
}


//===========================================================================
//                      WRITE WHOLE DS1672 REGISTER SET
// DESCRIPTTION:
//     Writes complete DS1672 register set from buffer into DS1672
//
// ARGUMENTS:
//     'regs'   Points to buffer with new register values
//===========================================================================
static __inline__ void DS_PUT(cyg_uint8 *regs) 
{
    //
    // set register pointer to first DS1672 register
    //
    i2c_start();
    i2c_byte_wr(I2C_DS1672_ADDR | I2C_WRITE);
    i2c_byte_wr(DS_REG_FIRST);
    //
    // now write whole register set
    //
    i2c_byte_wr(regs[0]);
    i2c_byte_wr(regs[1]);
    i2c_byte_wr(regs[2]);
    i2c_byte_wr(regs[3]);
    i2c_byte_wr(regs[4]);
    i2c_byte_wr(regs[5]);
    i2c_stop();
}

//---------------------------------------------------------------------------
// EOF devs_wallclock_h8s_edosk2674.inl