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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.
*
* Chip stub code of keyboard. Implements the chip interface.
*/
#include <stdint.h>
#include "chip_interface/keyboard.h"
static EcKeyboardCallback core_keyboard_callback;
/* each byte presents one column in 8 rows. 1 = pressed. */
static uint8_t virtual_matrix[MAX_KEYBOARD_MATRIX_COLS];
EcError EcKeyboardRegisterCallback(EcKeyboardCallback cb) {
core_keyboard_callback = cb;
return EC_SUCCESS;
}
/* Returns bit array of every key press stage. */
EcError EcKeyboardGetState(uint8_t *bit_array) {
/* TODO: implement later */
return EC_ERROR_UNIMPLEMENTED;
}
/* Called by test code. This simulates a key press or release.
* Usually, the test code would expect a scan code is received at host side.
*/
EcError SimulateKeyStateChange(int row, int col, int state) {
EC_ASSERT(row < MAX_KEYBOARD_MATRIX_ROWS);
EC_ASSERT(col < MAX_KEYBOARD_MATRIX_COLS);
if (!core_keyboard_callback) return EC_ERROR_UNKNOWN;
state = (state) ? 1 : 0;
int current_state = (virtual_matrix[col] >> row) & 1;
if (state && !current_state) {
/* key is just pressed down */
virtual_matrix[col] |= 1 << row;
core_keyboard_callback(row, col, state);
} else if (!state && current_state) {
virtual_matrix[col] &= ~(1 << row);
core_keyboard_callback(row, col, state);
} else {
/* Nothing happens if a key has been pressed or released. */
}
return EC_SUCCESS;
}
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