mirror of
https://gitee.com/anod/open_agb_firm.git
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155 lines
4.1 KiB
C
155 lines
4.1 KiB
C
/*
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* This file is part of libn3ds
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* Copyright (C) 2024 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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/*
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* Based on code from https://github.com/smealum/ctrulib
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*/
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#include "types.h"
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#include "mem_map.h"
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#include "arm11/drivers/hid.h"
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#include "arm11/drivers/mcu.h"
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#include "arm11/drivers/interrupt.h"
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#include "arm11/drivers/gpio.h"
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#include "arm11/drivers/codec.h"
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#define MCU_HID_IRQ_MASK (MCU_IRQ_VOL_SLIDER_CHANGE | MCU_IRQ_BATT_CHARGE_START | \
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MCU_IRQ_BATT_CHARGE_STOP | MCU_IRQ_SHELL_OPEN | \
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MCU_IRQ_SHELL_CLOSE | MCU_IRQ_WIFI_PRESS | \
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MCU_IRQ_HOME_RELEASE | MCU_IRQ_HOME_PRESS | \
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MCU_IRQ_POWER_HELD | MCU_IRQ_POWER_PRESS)
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#define CPAD_THRESHOLD (400)
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static u32 g_kHeld = 0, g_kDown = 0, g_kUp = 0;
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static u32 g_extraKeys = 0;
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TouchPos g_tPos = {0};
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CpadPos g_cPos = {0};
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void hidInit(void)
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{
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static bool inited = false;
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if(inited) return;
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inited = true;
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MCU_init();
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u16 state = MCU_getExternalHardwareStatus();
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u32 tmp = ~state<<3 & KEY_SHELL; // Current shell state. Bit is inverted.
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tmp |= state<<1 & KEY_BAT_CHARGING; // Current battery charging state
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state = MCU_getEarlyButtonsHeld();
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tmp |= ~state<<1 & KEY_HOME; // Current HOME button state
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g_extraKeys = tmp;
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CODEC_init();
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}
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static void updateMcuHidState(void)
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{
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const u32 state = MCU_getIrqs(MCU_HID_IRQ_MASK);
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if(state == 0) return;
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u32 tmp = g_extraKeys;
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tmp |= state & (KEY_POWER | KEY_POWER_HELD | KEY_HOME); // Power button pressed/held, HOME button pressed
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if(state & BIT(3)) tmp &= ~KEY_HOME; // HOME released
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tmp |= state>>1 & (KEY_WIFI | KEY_SHELL); // WiFi switch, shell closed
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if(state & BIT(6)) tmp &= ~KEY_SHELL; // Shell opened
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tmp |= state>>10 & KEY_BAT_CHARGING; // Battery started charging
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if(state & BIT(14)) tmp &= ~KEY_BAT_CHARGING; // Battery stopped charging
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tmp |= state>>16 & KEY_VOL_SLIDER; // Volume slider update
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g_extraKeys = tmp;
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}
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static u32 rawCodec2Hid(void)
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{
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static u32 fakeKeysCache = 0;
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alignas(4) CdcAdcData adc;
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if(!CODEC_getRawAdcData(&adc)) return fakeKeysCache;
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// Touchscreen
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// TODO: Calibration
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const u16 tx = __builtin_bswap16(adc.touchX[0]);
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u32 fakeKeys = (~tx & BIT(12))<<8; // KEY_TOUCH
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g_tPos.x = tx * 320u / 4096u;
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g_tPos.y = __builtin_bswap16(adc.touchY[0]) * 240u / 4096u;
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// Circle-Pad
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// TODO: Calibration
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g_cPos.y = (__builtin_bswap16(adc.cpadY[0]) & 0xFFFu) - 2048u;
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g_cPos.x = -((__builtin_bswap16(adc.cpadX[0]) & 0xFFFu) - 2048u); // X axis is inverted.
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if((g_cPos.x >= 0 ? g_cPos.x : -g_cPos.x) > CPAD_THRESHOLD)
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{
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if(g_cPos.x >= 0) fakeKeys |= KEY_CPAD_RIGHT;
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else fakeKeys |= KEY_CPAD_LEFT;
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}
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if((g_cPos.y >= 0 ? g_cPos.y : -g_cPos.y) > CPAD_THRESHOLD)
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{
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if(g_cPos.y >= 0) fakeKeys |= KEY_CPAD_UP;
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else fakeKeys |= KEY_CPAD_DOWN;
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}
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fakeKeysCache = fakeKeys;
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return fakeKeys;
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}
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void hidScanInput(void)
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{
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updateMcuHidState();
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const u32 kOld = g_kHeld;
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g_kHeld = rawCodec2Hid() | REG_HID_PAD;
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g_kDown = (~kOld) & g_kHeld;
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g_kUp = kOld & (~g_kHeld);
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}
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u32 hidKeysHeld(void)
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{
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return g_kHeld;
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}
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u32 hidKeysDown(void)
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{
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return g_kDown;
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}
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u32 hidKeysUp(void)
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{
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return g_kUp;
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}
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const TouchPos* hidGetTouchPosPtr(void)
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{
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return &g_tPos;
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}
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const CpadPos* hidGetCpadPosPtr(void)
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{
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return &g_cPos;
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}
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u32 hidGetExtraKeys(u32 clearMask)
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{
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const u32 tmp = g_extraKeys;
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g_extraKeys &= ~clearMask;
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return tmp;
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} |