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Diffstat (limited to 'ecos/packages/devs/watchdog/h8300/h8300h/current/src/watchdog_h8300h.cxx')
| -rw-r--r-- | ecos/packages/devs/watchdog/h8300/h8300h/current/src/watchdog_h8300h.cxx | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/ecos/packages/devs/watchdog/h8300/h8300h/current/src/watchdog_h8300h.cxx b/ecos/packages/devs/watchdog/h8300/h8300h/current/src/watchdog_h8300h.cxx new file mode 100644 index 0000000..51d2f43 --- /dev/null +++ b/ecos/packages/devs/watchdog/h8300/h8300h/current/src/watchdog_h8300h.cxx @@ -0,0 +1,112 @@ +//========================================================================== +// +// 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 |