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/* Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* keyboard.h - Keyboard interface between EC core and EC Lib.
*/
#ifndef __CHIP_INTERFACE_KEYBOARD_H
#define __CHIP_INTERFACE_KEYBOARD_H
#include "cros_ec/include/ec_common.h"
#define MAX_KEYBOARD_MATRIX_COLS 16
#define MAX_KEYBOARD_MATRIX_ROWS 8
typedef void (*EcKeyboardCallback)(int col, int row, int is_pressed);
/* Registers a callback function to underlayer EC lib. So that any key state
* change would notify the upper EC main code.
*
* Note that passing NULL removes any previously registered callback.
*/
EcError EcKeyboardRegisterCallback(EcKeyboardCallback cb);
/* Asks the underlayer EC lib what keys are pressed right now.
*
* Sets bit_array to a debounced array of which keys are currently pressed,
* where a 1-bit means the key is pressed. For example, if only col=2 row=3
* is pressed, it would set bit_array to {0, 0, 0x08, 0, ...}
*
* bit_array must be at least MAX_KEYBOARD_MATRIX_COLS bytes long.
*/
EcError EcKeyboardGetState(uint8_t *bit_array);
#endif /* __CHIP_INTERFACE_KEYBOARD_H */
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