1 /*

     2 This file is part of CanFestival, a library implementing CanOpen Stack.

     3 

     4 Copyright (C): Edouard TISSERANT and Francis DUPIN

     5 AVR Port: Andreas GLAUSER and Peter CHRISTEN

     6 

     7 See COPYING file for copyrights details.

     8 

     9 This library is free software; you can redistribute it and/or

    10 modify it under the terms of the GNU Lesser General Public

    11 License as published by the Free Software Foundation; either

    12 version 2.1 of the License, or (at your option) any later version.

    13 

    14 This library is distributed in the hope that it will be useful,

    15 but WITHOUT ANY WARRANTY; without even the implied warranty of

    16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    17 Lesser General Public License for more details.

    18 

    19 You should have received a copy of the GNU Lesser General Public

    20 License along with this library; if not, write to the Free Software

    21 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    22 */

    23 

    24 #ifndef __TIMERSCFG_H__

    25 #define __TIMERSCFG_H__

    26 

    27 // Whatever your microcontroller, the timer wont work if

    28 // TIMEVAL is not at least on 32 bits

    29 #define TIMEVAL UNS32

    30 

    31 // The timer of the AVR counts from 0000 to 0xFFFF in CTC mode (it can be

    32 // shortened setting OCR3A eg. to get 2ms instead of 2.048ms)

    33 #define TIMEVAL_MAX 0xFFFF

    34 

    35 // The timer is incrementing every 4 us.

    36 //#define MS_TO_TIMEVAL(ms) (ms * 250)

    37 //#define US_TO_TIMEVAL(us) (us>>2)

    38 

    39 // The timer is incrementing every 8 us.

    40 #define MS_TO_TIMEVAL(ms) ((ms) * 125)

    41 #define US_TO_TIMEVAL(us) ((us)>>3)

    42 

    43 #endif