Add seconds timer + bugfixes

ipl/btn.c

@@ -60,14 +60,14 @@ u32 btn_wait()
 
 u32 btn_wait_timeout(u32 time_ms, u32 mask)
 {
-	u32 timeout = get_tmr() + (time_ms * 1000);
+	u32 timeout = get_tmr_us() + (time_ms * 1000);
 	u32 res = btn_read() & mask;
 
 	do
 	{
 		if (!(res & mask))
 			res = btn_read() & mask;
-	} while (get_tmr() < timeout);
+	} while (get_tmr_us() < timeout);
 
 	return res;
 }