50 lines
1.6 KiB
C
50 lines
1.6 KiB
C
// Copyright 2021 IOsetting <iosetting(at)outlook.com>
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef ___FW_WDT_H___
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#define ___FW_WDT_H___
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#include "fw_conf.h"
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#include "fw_types.h"
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/********************************************************
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* STC8 watchdog behavior is different from STC15
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*
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* STC8 watchdog will ALWAYS reset chip from ISP code region inspite of the
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* setting of SWBS in IAP_CONTR
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*
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*/
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/**
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* Start watchdog.
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* It cannot be stopped in code once it is started
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*/
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#define WDT_StartWatchDog() SFR_SET(WDT_CONTR, 5)
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/**
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* Reset watchdog counter to avoid reset
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*/
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#define WDT_ResetCounter() SFR_SET(WDT_CONTR, 4)
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/**
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* Enable or disable watchdog counter in idle mode
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*/
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#define WDT_EnableCounterWhenIdle(__STATE__) SFR_ASSIGN(WDT_CONTR, 3, __STATE__)
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/**
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* Set counter prescaler. The higher this value is, the longer counter overflow will take place
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*
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* Toverflow (in seconds) = 12 * 32768 * 2^(__PRE_SCALER__ + 1) / SYSCLK
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*/
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#define WDT_SetCounterPrescaler(__PRE_SCALER__) (WDT_CONTR = WDT_CONTR & ~0x07 | (__PRE_SCALER__ & 0x07))
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#endif
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