Lockpick_RCM/source/utils/btn.c
2019-12-08 19:17:46 -07:00

86 lines
1.8 KiB
C

/*
* 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)
{
u8 single_button = mask & BTN_SINGLE;
mask &= ~BTN_SINGLE;
u32 timeout = get_tmr_ms() + time_ms;
u8 res = btn_read();
while (get_tmr_ms() < timeout)
{
if ((res & mask) == mask)
{
if (single_button && (res & ~mask)) // Undesired button detected.
res = btn_read();
else
return (res & mask);
}
else
res = btn_read();
};
// Timed out.
return 0;
}