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# Copyright (c) 2012 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 debounce test
#
import time
SHORTER_THAN_DEBOUNCE_TIME = 0.005 # 5ms
LONGER_THAN_DEBOUNCE_TIME = 0.020 # 20ms
KEYPRESS_REGEX = "\[KB state: (?P<km>[0-9\s-]*)\]"
def consume_output(helper, reg_ex):
done = False
while not done:
try:
helper.wait_output(reg_ex, use_re=True, timeout=1)
except:
done = True
def get_key_count(s):
key_count_map = {'1': 1, '2': 1, '3': 2, '4': 1, '5': 2, '6': 2, '7': 3,
'8': 1, '9': 2, 'a': 2, 'b': 3, 'c': 2, 'd': 3, 'e': 3,
'e': 4, '-': 0, ' ': 0, '0': 0}
return reduce(lambda x, y: x + key_count_map[y], s, 0)
def expect_key_count(helper, cnt):
s = helper.wait_output(KEYPRESS_REGEX, use_re=True, timeout=1)["km"]
act_cnt = get_key_count(s)
if act_cnt != cnt:
helper.trace("Expecting %d key press, got %d." % (cnt, act_cnt))
return False
else:
return True
def test(helper):
# Wait for EC initialized
helper.wait_output("--- UART initialized")
# Enable keyboard scanning and disable typematic
helper.ec_command("kbd enable")
helper.ec_command("typematic 1000000 1000000")
# Press for a short period and check this is ignored
consume_output(helper, KEYPRESS_REGEX)
helper.ec_command("mockmatrix 1 1 1")
time.sleep(SHORTER_THAN_DEBOUNCE_TIME)
helper.ec_command("mockmatrix 1 1 0")
if not helper.check_no_output(KEYPRESS_REGEX, use_re=True):
return False
# Press for a longer period and check keypress is accepted
consume_output(helper, KEYPRESS_REGEX)
helper.ec_command("mockmatrix 1 1 1")
time.sleep(LONGER_THAN_DEBOUNCE_TIME)
helper.ec_command("mockmatrix 1 1 0")
if not expect_key_count(helper, 1): # Press
return False
if not expect_key_count(helper, 0): # Release
return False
# Press and release for a short period, and then press for a longer
# period and check exactly one keypress is accepted
consume_output(helper, KEYPRESS_REGEX)
helper.ec_command("mockmatrix 1 1 1")
time.sleep(SHORTER_THAN_DEBOUNCE_TIME)
helper.ec_command("mockmatrix 1 1 0")
time.sleep(SHORTER_THAN_DEBOUNCE_TIME)
helper.ec_command("mockmatrix 1 1 1")
time.sleep(LONGER_THAN_DEBOUNCE_TIME)
helper.ec_command("mockmatrix 1 1 0")
if not expect_key_count(helper, 1): # Press
return False
if not expect_key_count(helper, 0): # Release
return False
if not helper.check_no_output(KEYPRESS_REGEX, use_re=True):
return False
# Hold down a key and press another key for a short period. Expect
# this event is ignored
consume_output(helper, KEYPRESS_REGEX)
helper.ec_command("mockmatrix 1 1 1")
if not expect_key_count(helper, 1):
return False
helper.ec_command("mockmatrix 2 2 1")
time.sleep(SHORTER_THAN_DEBOUNCE_TIME)
helper.ec_command("mockmatrix 2 2 0")
if not helper.check_no_output(KEYPRESS_REGEX, use_re=True):
return False
helper.ec_command("mockmatrix 1 1 0")
if not expect_key_count(helper, 0):
return False
return True # Pass!
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