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7bea5174a1
Ref: http://smbus.org/specs/smbus20.pdf - Support software CRC8 generation and checking. - Support read/write word (2-bytes) - Support read/write blocks (up to 32 bytes) BUG=chrome-os-partner:24741 BRANCH=ToT,glimmer TEST=Verified with smart battery firmware update application on glimmer. Passed LGC & Simplo Battery. Change-Id: Ic2e7f759af80c06741ed49fee1826213429fbf8a Signed-off-by: Sheng-Liang Song <ssl@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/209747 Reviewed-by: Randall Spangler <rspangler@chromium.org>
22 lines
664 B
C
22 lines
664 B
C
/* Copyright (c) 2014 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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* Very simple 8-bit CRC function.
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*/
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#ifndef __EC_CRC8_H__
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#define __EC_CRC8_H__
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/**
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* crc8
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* Return CRC-8 of the data, using x^8 + x^2 + x + 1 polynomial. A table-based
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* algorithm would be faster, but for only a few bytes it isn't worth the code
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* size.
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* @param data uint8_t *, input, a pointer to input data
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* @param len int, input, size of iput data in byte
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* @return the crc-8 of the input data.
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*/
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uint8_t crc8(const uint8_t *data, int len);
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#endif /* __EC_CRC8_H__ */
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