1/* Copyright (c) 2013-2016 Jeffrey Pfau
 2 *
 3 * This Source Code Form is subject to the terms of the Mozilla Public
 4 * License, v. 2.0. If a copy of the MPL was not distributed with this
 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 6#ifndef GBA_TIMER_H
 7#define GBA_TIMER_H
 8
 9#include "util/common.h"
10#include "core/timing.h"
11
12DECL_BITFIELD(GBATimerFlags, uint32_t);
13DECL_BITS(GBATimerFlags, PrescaleBits, 0, 4);
14DECL_BIT(GBATimerFlags, CountUp, 4);
15DECL_BIT(GBATimerFlags, DoIrq, 5);
16DECL_BIT(GBATimerFlags, Enable, 6);
17
18struct GBA;
19struct GBATimer {
20	uint16_t reload;
21	uint16_t oldReload;
22	uint32_t lastEvent;
23	struct mTimingEvent event;
24	int32_t overflowInterval;
25	GBATimerFlags flags;
26};
27
28void GBATimerInit(struct GBA* gba);
29void GBATimerUpdateRegister(struct GBA* gba, int timer);
30void GBATimerWriteTMCNT_LO(struct GBA* gba, int timer, uint16_t value);
31void GBATimerWriteTMCNT_HI(struct GBA* gba, int timer, uint16_t value);
32
33#endif