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89 lines
2.0 KiB
C
89 lines
2.0 KiB
C
/*
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* Copyright (c) 2018 naehrwert
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* Copyright (c) 2018 CTCaer
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* 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 "btn.h"
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#include "../soc/i2c.h"
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#include "../soc/gpio.h"
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#include "../soc/t210.h"
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#include "util.h"
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#include "../power/max77620.h"
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u8 btn_read()
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{
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u8 res = 0;
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if (!gpio_read(GPIO_PORT_X, GPIO_PIN_7))
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res |= BTN_VOL_DOWN;
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if (!gpio_read(GPIO_PORT_X, GPIO_PIN_6))
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res |= BTN_VOL_UP;
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if (i2c_recv_byte(4, MAX77620_I2C_ADDR, MAX77620_REG_ONOFFSTAT) & 0x4)
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res |= BTN_POWER;
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return res;
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}
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u8 btn_wait()
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{
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u8 res = 0, btn = btn_read();
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bool pwr = false;
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//Power button down, raise a filter.
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if (btn & BTN_POWER)
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{
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pwr = true;
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btn &= ~BTN_POWER;
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}
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do
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{
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res = btn_read();
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//Power button up, remove filter.
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if (!(res & BTN_POWER) && pwr)
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pwr = false;
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else if (pwr) //Power button still down.
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res &= ~BTN_POWER;
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} while (btn == res);
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return res;
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}
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u8 btn_wait_timeout(u32 time_ms, u8 mask)
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{
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u8 single_button = mask & BTN_SINGLE;
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mask &= ~BTN_SINGLE;
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u32 timeout = get_tmr_ms() + time_ms;
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u8 res = btn_read();
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while (get_tmr_ms() < timeout)
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{
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if ((res & mask) == mask)
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{
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if (single_button && (res & ~mask)) // Undesired button detected.
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res = btn_read();
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else
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return (res & mask);
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}
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else
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res = btn_read();
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};
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// Timed out.
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if (!single_button || !time_ms)
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return (res & mask);
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else
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return 0; // Return no button press if single button requested.
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}
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