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46 lines
1 KiB
C
46 lines
1 KiB
C
/* Copyright (c) 2013-2016 Jeffrey Pfau
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef GB_TIMER_H
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#define GB_TIMER_H
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#include <mgba-util/common.h>
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CXX_GUARD_START
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#include <mgba/core/timing.h>
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DECL_BITFIELD(GBRegisterTAC, uint8_t);
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DECL_BITS(GBRegisterTAC, Clock, 0, 2);
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DECL_BIT(GBRegisterTAC, Run, 2);
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enum {
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GB_DMG_DIV_PERIOD = 16
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};
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struct GB;
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struct GBTimer {
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struct GB* p;
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struct mTimingEvent event;
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struct mTimingEvent irq;
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uint32_t internalDiv;
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int32_t nextDiv;
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uint32_t timaPeriod;
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};
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void GBTimerReset(struct GBTimer*);
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void GBTimerDivReset(struct GBTimer*);
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uint8_t GBTimerUpdateTAC(struct GBTimer*, GBRegisterTAC tac);
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struct GBSerializedState;
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void GBTimerSerialize(const struct GBTimer* timer, struct GBSerializedState* state);
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void GBTimerDeserialize(struct GBTimer* timer, const struct GBSerializedState* state);
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CXX_GUARD_END
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#endif
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