hekate/hwinit/btn.c

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2018-03-26 23:04:16 +00:00
/*
* Copyright (c) 2018 naehrwert
*
* 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 "i2c.h"
#include "t210.h"
u32 btn_read()
{
u32 res = 0;
if(!(GPIO_6(0x3C) & 0x80))
res |= BTN_VOL_DOWN;
if(!(GPIO_6(0x3C) & 0x40))
res |= BTN_VOL_UP;
if(i2c_recv_byte(4, 0x3C, 0x15) & 0x4)
res |= BTN_POWER;
return res;
}
u32 btn_wait()
{
u32 res = 0, btn = btn_read();
do
{
res = btn_read();
} while (btn == res);
return res;
}