31 lines
1004 B
C
31 lines
1004 B
C
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/* Copyright 2012 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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/**
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* Test low-level key scanning
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*
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* ectool keyscan <beat_us> <filename>
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*
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* <beat_us> is the length of a beat in microseconds. This indicates the
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* typing speed. Typically we scan at 10ms in the EC, so the beat period
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* will typically be 1-5ms, with the scan changing only every 20-30ms at
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* most.
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* <filename> specifies a file containing keys that are depressed on each
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* beat in the following format:
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*
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* <beat> <keys_pressed>
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*
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* <beat> is a beat number (0, 1, 2). The timestamp of this event will
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* be <start_time> + <beat> * <beat_us>.
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* <keys_pressed> is a (possibly empty) list of ASCII keys
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*
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* The key matrix is read from the fdt.
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*
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* @param argc Number of arguments (excluding 'ectool')
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* @param argv List of arguments
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* @return 0 if ok, -1 on error
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*/
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int cmd_keyscan(int argc, char *argv[]);
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