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/*
* Copyright 2013 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 scanner test module for Chrome EC */
#ifndef __CROS_EC_KEYBOARD_TEST_H
#define __CROS_EC_KEYBOARD_TEST_H
#include <timer.h>
/*
* Keyboard scan test item - contains a single scan to 'present' to key scan
* logic.
*/
struct keyscan_item {
timestamp_t abs_time; /* absolute timestamp to present this item */
uint32_t time_us; /* time for this item relative to test start */
uint8_t done; /* 1 if we managed to present this */
uint8_t scan[KEYBOARD_COLS_MAX];
};
/**
* Get the next key scan from the test sequence, if any
*
* @param column Column to read (-1 to OR all columns together
* @param scan Raw scan data read from GPIOs
* @return test scan, or just 'scan' if no test is active
*/
uint8_t keyscan_seq_get_scan(int column, uint8_t scan);
/**
* Calculate the delay until the next key scan event needs to be presented
*
* @return number of microseconds from now until the next key scan event, or
* -1 if there is no future key scan event (e.g. testing is complete)
*/
int keyscan_seq_next_event_delay(void);
#endif
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