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/* Copyright (c) 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.
* Copyright 2013 Google Inc.
*
* Tasks for keyboard scan deghosting.
*/
#include "common.h"
#include "console.h"
#include "keyboard_raw.h"
#include "keyboard_scan.h"
#include "task.h"
#include "timer.h"
#include "util.h"
#define KEYDOWN_DELAY_MS 10
#define KEYDOWN_RETRY 10
#define NO_KEYDOWN_DELAY_MS 200
#define TEST(n) \
do { \
if (!n()) { \
ccprintf("%s failed.\n", #n); \
return EC_ERROR_UNKNOWN; \
} \
} while (0)
uint8_t mock_state[KEYBOARD_COLS];
int column_driven;
int fifo_add_count;
void keyboard_raw_drive_column(int out)
{
column_driven = out;
}
int keyboard_raw_read_rows(void)
{
int i;
int r = 0;
if (column_driven == KEYBOARD_COLUMN_NONE) {
return 0;
} else if (column_driven == KEYBOARD_COLUMN_ALL) {
for (i = 0; i < KEYBOARD_COLS; ++i)
r |= mock_state[i];
return r;
} else {
return mock_state[column_driven];
}
}
int keyboard_fifo_add(const uint8_t *buffp)
{
fifo_add_count++;
return EC_SUCCESS;
}
void mock_key(int r, int c, int keydown)
{
ccprintf("%s (%d, %d)\n", keydown ? "Pressing" : "Releasing", r, c);
if (keydown)
mock_state[c] |= (1 << r);
else
mock_state[c] &= ~(1 << r);
}
int expect_keychange(void)
{
int old_count = fifo_add_count;
int retry = KEYDOWN_RETRY;
task_wake(TASK_ID_KEYSCAN);
while (retry--) {
msleep(KEYDOWN_DELAY_MS);
if (fifo_add_count > old_count)
return 1;
}
return 0;
}
int expect_no_keychange(void)
{
int old_count = fifo_add_count;
task_wake(TASK_ID_KEYSCAN);
msleep(NO_KEYDOWN_DELAY_MS);
return fifo_add_count == old_count;
}
int deghost_test(void)
{
/* Test we can detect a keypress */
mock_key(1, 1, 1);
TEST(expect_keychange);
mock_key(1, 1, 0);
TEST(expect_keychange);
/* (1, 1) (1, 2) (2, 1) (2, 2) form ghosting keys */
mock_key(1, 1, 1);
TEST(expect_keychange);
mock_key(2, 2, 1);
TEST(expect_keychange);
mock_key(1, 2, 1);
mock_key(2, 1, 1);
TEST(expect_no_keychange);
mock_key(2, 1, 0);
mock_key(1, 2, 0);
TEST(expect_no_keychange);
mock_key(2, 2, 0);
TEST(expect_keychange);
mock_key(1, 1, 0);
TEST(expect_keychange);
/* (1, 1) (2, 0) (2, 1) don't form ghosting keys */
mock_key(1, 1, 1);
TEST(expect_keychange);
mock_key(2, 0, 1);
TEST(expect_keychange);
mock_key(1, 0, 1);
mock_key(2, 1, 1);
TEST(expect_keychange);
mock_key(1, 0, 0);
mock_key(2, 1, 0);
TEST(expect_keychange);
mock_key(2, 0, 0);
TEST(expect_keychange);
mock_key(1, 1, 0);
TEST(expect_keychange);
return EC_SUCCESS;
}
static int command_run_test(int argc, char **argv)
{
int r = deghost_test();
if (r == EC_SUCCESS)
ccprintf("Pass!\n");
else
ccprintf("Fail!\n");
return r;
}
DECLARE_CONSOLE_COMMAND(runtest, command_run_test,
NULL, NULL, NULL);
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