/* * Copyright (c) 2018 naehrwert * Copyright (C) 2018 CTCaer * * This program is free software; you can redistribute it and/or modify it * under the terms and conditions of the GNU General Public License, * version 2, as published by the Free Software Foundation. * * This program is distributed in the hope it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include "btn.h" #include "../soc/i2c.h" #include "../soc/gpio.h" #include "../soc/t210.h" #include "util.h" #include "../power/max77620.h" u8 btn_read() { u8 res = 0; if (!gpio_read(GPIO_PORT_X, GPIO_PIN_7)) res |= BTN_VOL_DOWN; if (!gpio_read(GPIO_PORT_X, GPIO_PIN_6)) res |= BTN_VOL_UP; if (i2c_recv_byte(4, MAX77620_I2C_ADDR, MAX77620_REG_ONOFFSTAT) & 0x4) res |= BTN_POWER; return res; } u8 btn_wait() { u8 res = 0, btn = btn_read(); bool pwr = false; //Power button down, raise a filter. if (btn & BTN_POWER) { pwr = true; btn &= ~BTN_POWER; } do { res = btn_read(); //Power button up, remove filter. if (!(res & BTN_POWER) && pwr) pwr = false; else if (pwr) //Power button still down. res &= ~BTN_POWER; } while (btn == res); return res; } u8 btn_wait_timeout(u32 time_ms, u8 mask) { u32 timeout = get_tmr_ms() + time_ms; u8 res = btn_read() & mask; while (get_tmr_ms() < timeout) { if (res == mask) break; else res = btn_read() & mask; }; return res; }