mirror of
https://github.com/LumaTeam/Luma3DS.git
synced 2026-02-22 18:04:38 +00:00
97cc70d35d
- previously, we left brightness voltage and LCD panel voltage on even though we disabled PWM and output signal, causing GSP to misdetect screen state in turn. Fix that (this fixes the issue mentioned above) - Initialize the LCD controller over I2C, this fixes some rare sync issues some screen have with other Arm9 homebrew This may not fix 100% of the issues, only the most egregious/dangerous ones. There's still a lot of tech debt in Luma's baremetal code, that necessitate a full rewrite to fix (not planned for this year)
105 lines
3.0 KiB
C
105 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_LCD_TOP = 5,
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I2C_DEV_LCD_BOT = 6,
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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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