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autoboot: Support VOL-+ combo for fastboot

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This is conditional:
In order to not cancel booting while trying to enter fastboot in android, the combo MUST be initiated with `VOL+` (hold) -> `VOL-` (hold)
This commit is contained in:
CTCaer
2019-12-07 23:37:07 +02:00
parent 35e853fd03
commit 943477fdde
2 changed files with 15 additions and 6 deletions
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19
bootloader/utils/btn.c
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@@ -61,16 +61,25 @@ u8 btn_wait()
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() & mask;
u8 res = btn_read();
while (get_tmr_ms() < timeout)
{
if (res == mask)
break;
if ((res & mask) == mask)
{
if (single_button && (res & ~mask)) // Undesired button detected.
res = btn_read();
else
return (res & mask);
}
else
res = btn_read() & mask;
res = btn_read();
};
return res;
// Timed out.
return 0;
}