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https://github.com/0xFEEDC0DE64/arduino-esp32.git
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63 lines
2.3 KiB
C
63 lines
2.3 KiB
C
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/******************************************************************************
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*
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* Copyright (C) 2003-2012 Broadcom Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************/
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/******************************************************************************
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*
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* This contains constants definitions and other information from the AVCTP
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* specification. This file is intended for use internal to AVCT only.
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*
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******************************************************************************/
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#ifndef AVCT_DEFS_H
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#define AVCT_DEFS_H
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/*****************************************************************************
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** constants
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*****************************************************************************/
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/* packet type */
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#define AVCT_PKT_TYPE_SINGLE 0 /* single packet */
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#define AVCT_PKT_TYPE_START 1 /* start packet */
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#define AVCT_PKT_TYPE_CONT 2 /* continue packet */
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#define AVCT_PKT_TYPE_END 3 /* end packet */
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/* header lengths for different packet types */
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#define AVCT_HDR_LEN_SINGLE 3
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#define AVCT_HDR_LEN_START 4
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#define AVCT_HDR_LEN_CONT 1
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#define AVCT_HDR_LEN_END 1
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/* invalid cr+ipid value */
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#define AVCT_CR_IPID_INVALID 1
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/*****************************************************************************
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** message parsing and building macros
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*****************************************************************************/
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#define AVCT_BLD_HDR(p, label, type, cr_ipid) \
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*(p)++ = ((label) << 4) | ((type) << 2) | (cr_ipid);
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#define AVCT_PRS_HDR(p, label, type, cr_ipid) \
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label = *(p) >> 4; \
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type = (*(p) >> 2) & 3; \
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cr_ipid = *(p)++ & 3;
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#define AVCT_PRS_PKT_TYPE(p, type) \
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type = (*(p) >> 2) & 3;
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#endif /* AVCT_DEFS_H */
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