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[/] [openrisc/] [trunk/] [rtos/] [ecos-3.0/] [packages/] [devs/] [watchdog/] [h8300/] [h8300h/] [current/] [src/] [watchdog_h8300h.cxx] - Rev 799
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//========================================================================== // // devs/watchdog/h8300/h83000/watchdog_h8300.cxx // // Watchdog implementation for Hitachi H8/300H CPUs // //========================================================================== // ####ECOSGPLCOPYRIGHTBEGIN#### // ------------------------------------------- // This file is part of eCos, the Embedded Configurable Operating System. // Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc. // // 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., // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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 v2. // // This exception does not invalidate any other reasons why a work based // on this file might be covered by the GNU General Public License. // ------------------------------------------- // ####ECOSGPLCOPYRIGHTEND#### //========================================================================== //#####DESCRIPTIONBEGIN#### // // Author(s): yoshinori sato // Contributors: yoshinori sato // Date: 2002-04-29 // Purpose: Watchdog class implementation // Description: Contains an implementation of the Watchdog class for use // with the Hitachi H8/300H watchdog timer. // //####DESCRIPTIONEND#### // //========================================================================== #include <pkgconf/system.h> // system configuration file #include <pkgconf/watchdog.h> // configuration for this package #include <cyg/infra/cyg_trac.h> // tracing macros #include <cyg/hal/hal_arch.h> #include <cyg/hal/hal_io.h> // IO register access #include <cyg/hal/mod_regs_wdt.h> // watchdog register definitions #include <cyg/io/watchdog.hxx> // watchdog API // ------------------------------------------------------------------------- // Constructor void Cyg_Watchdog::init_hw(void) { CYG_REPORT_FUNCTION(); // No hardware init needed. resolution = CYGARC_WDT_PERIOD; CYG_REPORT_RETURN(); } // ------------------------------------------------------------------------- // Start the watchdog running. void Cyg_Watchdog::start() { CYG_REPORT_FUNCTION(); //Stop WDT HAL_WRITE_UINT16(CYGARC_TCSR,CYGARC_TCSR_MAGIC); //Clear WDT Count HAL_WRITE_UINT16(CYGARC_TCSR,CYGARC_TCNT_MAGIC); //Start WDT HAL_WRITE_UINT16(CYGARC_TCSR,CYGARC_TCSR_MAGIC| CYGARC_WDT_WT|CYGARC_WDT_TME|CYGARC_WDT_CKS); CYG_REPORT_RETURN(); } // ------------------------------------------------------------------------- // Reset watchdog timer. This needs to be called regularly to prevent // the watchdog firing. void Cyg_Watchdog::reset() { CYG_REPORT_FUNCTION(); HAL_WRITE_UINT16(CYGARC_TCSR,CYGARC_TCNT_MAGIC); CYG_REPORT_RETURN(); } // ------------------------------------------------------------------------- // EOF watchdog_h8300.cxx
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