mirror of
https://github.com/italicsjenga/agb.git
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90 lines
2.2 KiB
C
90 lines
2.2 KiB
C
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/* Copyright (c) 2013-2015 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 GBA_SIO_H
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#define GBA_SIO_H
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#include <mgba-util/common.h>
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CXX_GUARD_START
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#include <mgba/gba/interface.h>
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#include <mgba/core/log.h>
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#define MAX_GBAS 4
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extern const int GBASIOCyclesPerTransfer[4][MAX_GBAS];
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mLOG_DECLARE_CATEGORY(GBA_SIO);
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enum {
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RCNT_INITIAL = 0x8000
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};
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enum {
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JOY_CMD_RESET = 0xFF,
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JOY_CMD_POLL = 0x00,
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JOY_CMD_TRANS = 0x14,
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JOY_CMD_RECV = 0x15,
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JOYSTAT_TRANS = 8,
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JOYSTAT_RECV = 2,
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JOYCNT_RESET = 1,
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JOYCNT_RECV = 2,
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JOYCNT_TRANS = 4,
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};
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DECL_BITFIELD(GBASIONormal, uint16_t);
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DECL_BIT(GBASIONormal, Sc, 0);
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DECL_BIT(GBASIONormal, InternalSc, 1);
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DECL_BIT(GBASIONormal, Si, 2);
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DECL_BIT(GBASIONormal, IdleSo, 3);
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DECL_BIT(GBASIONormal, Start, 7);
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DECL_BIT(GBASIONormal, Length, 12);
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DECL_BIT(GBASIONormal, Irq, 14);
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DECL_BITFIELD(GBASIOMultiplayer, uint16_t);
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DECL_BITS(GBASIOMultiplayer, Baud, 0, 2);
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DECL_BIT(GBASIOMultiplayer, Slave, 2);
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DECL_BIT(GBASIOMultiplayer, Ready, 3);
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DECL_BITS(GBASIOMultiplayer, Id, 4, 2);
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DECL_BIT(GBASIOMultiplayer, Error, 6);
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DECL_BIT(GBASIOMultiplayer, Busy, 7);
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DECL_BIT(GBASIOMultiplayer, Irq, 14);
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struct GBASIODriverSet {
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struct GBASIODriver* normal;
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struct GBASIODriver* multiplayer;
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struct GBASIODriver* joybus;
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};
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struct GBASIO {
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struct GBA* p;
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enum GBASIOMode mode;
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struct GBASIODriverSet drivers;
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struct GBASIODriver* activeDriver;
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uint16_t rcnt;
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uint16_t siocnt;
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};
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void GBASIOInit(struct GBASIO* sio);
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void GBASIODeinit(struct GBASIO* sio);
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void GBASIOReset(struct GBASIO* sio);
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void GBASIOSetDriverSet(struct GBASIO* sio, struct GBASIODriverSet* drivers);
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void GBASIOSetDriver(struct GBASIO* sio, struct GBASIODriver* driver, enum GBASIOMode mode);
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void GBASIOWriteRCNT(struct GBASIO* sio, uint16_t value);
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void GBASIOWriteSIOCNT(struct GBASIO* sio, uint16_t value);
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uint16_t GBASIOWriteRegister(struct GBASIO* sio, uint32_t address, uint16_t value);
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int GBASIOJOYSendCommand(struct GBASIODriver* sio, enum GBASIOJOYCommand command, uint8_t* data);
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CXX_GUARD_END
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#endif
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