103 lines
3.0 KiB
C
103 lines
3.0 KiB
C
#pragma once
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/*
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* This file is part of fastboot 3DS
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* Copyright (C) 2017 derrek, profi200
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdbool.h>
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#include "types.h"
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#define I2C_STOP (1u)
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#define I2C_START (1u<<1)
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#define I2C_ERROR (1u<<2)
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#define I2C_ACK (1u<<4)
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#define I2C_DIRE_WRITE (0u)
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#define I2C_DIRE_READ (1u<<5)
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#define I2C_IRQ_ENABLE (1u<<6)
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#define I2C_ENABLE (1u<<7)
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#define I2C_GET_ACK(reg) ((bool)((reg)>>4 & 1u))
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typedef enum
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{
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I2C_DEV_POWER = 0, // Unconfirmed
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I2C_DEV_CAMERA = 1, // Unconfirmed
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I2C_DEV_CAMERA2 = 2, // Unconfirmed
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I2C_DEV_MCU = 3,
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I2C_DEV_GYRO = 10,
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I2C_DEV_DEBUG_PAD = 12,
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I2C_DEV_IR = 13,
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I2C_DEV_EEPROM = 14, // Unconfirmed
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I2C_DEV_NFC = 15,
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I2C_DEV_QTM = 16,
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I2C_DEV_N3DS_HID = 17
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} I2cDevice;
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/**
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* @brief Initializes the I2C buses. Call this only once.
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*/
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void I2C_init(void);
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/**
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* @brief Reads data from a I2C register to a buffer.
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*
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* @param[in] devId The device ID. Use the enum above.
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* @param[in] regAddr The register address.
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* @param out The output buffer pointer.
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* @param[in] size The read size.
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*
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* @return Returns true on success and false on failure.
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*/
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bool I2C_readRegBuf(I2cDevice devId, u8 regAddr, u8 *out, u32 size);
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/**
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* @brief Writes a buffer to a I2C register.
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*
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* @param[in] devId The device ID. Use the enum above.
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* @param[in] regAddr The register address.
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* @param[in] in The input buffer pointer.
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* @param[in] size The write size.
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*
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* @return Returns true on success and false on failure.
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*/
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bool I2C_writeRegBuf(I2cDevice devId, u8 regAddr, const u8 *in, u32 size);
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/**
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* @brief Reads a byte from a I2C register.
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*
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* @param[in] devId The device ID. Use the enum above.
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* @param[in] regAddr The register address.
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*
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* @return Returns the value read on success otherwise 0xFF.
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*/
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u8 I2C_readReg(I2cDevice devId, u8 regAddr);
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/**
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* @brief Writes a byte to a I2C register.
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*
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* @param[in] devId The device ID. Use the enum above.
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* @param[in] regAddr The register address.
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* @param[in] data The data to write.
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*
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* @return Returns true on success and false on failure.
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*/
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bool I2C_writeReg(I2cDevice devId, u8 regAddr, u8 data);
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