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1e82368778
1. Kconfig import wtih DM 2. Add DM API for Drivers Signed-off-by: GuEe-GUI <2991707448@qq.com>
66 lines
2.1 KiB
C
66 lines
2.1 KiB
C
/*
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* Copyright (c) 2006-2022, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2022-11-26 GuEe-GUI first version
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*/
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#ifndef __CAN_DM_H__
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#define __CAN_DM_H__
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#include <drivers/misc.h>
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/* Special address description flags for the CAN_ID */
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#define CAN_EFF_FLAG 0x80000000U /* EFF/SFF is set in the MSB */
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#define CAN_RTR_FLAG 0x40000000U /* Remote transmission request */
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#define CAN_ERR_FLAG 0x20000000U /* Error message frame */
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/* Valid bits in CAN ID for frame formats */
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#define CAN_SFF_MASK 0x000007ffU /* Standard frame format (SFF) */
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#define CAN_EFF_MASK 0x1fffffffU /* Extended frame format (EFF) */
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#define CAN_ERR_MASK 0x1fffffffU /* Omit EFF, RTR, ERR flags */
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#define CANXL_PRIO_MASK CAN_SFF_MASK /* 11 bit priority mask */
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/* CAN payload length and DLC definitions according to ISO 11898-1 */
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#define CAN_MAX_DLC 8
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#define CAN_MAX_RAW_DLC 15
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#define CAN_MAX_DLEN 8
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/* CAN FD payload length and DLC definitions according to ISO 11898-7 */
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#define CANFD_MAX_DLC 15
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#define CANFD_MAX_DLEN 64
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/*
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* To be used in the CAN netdriver receive path to ensure conformance with
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* ISO 11898-1 Chapter 8.4.2.3 (DLC field)
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*/
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#define can_get_dlc(v) (rt_min_t(rt_uint8_t, (v), CAN_MAX_DLC))
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#define canfd_get_dlc(v) (rt_min_t(rt_uint8_t, (v), CANFD_MAX_DLC))
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/**
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* @brief Convert CAN DLC value to actual data length
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*
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* Converts a CAN Data Length Code (DLC) to the actual number of data bytes
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* according to ISO 11898-1 and ISO 11898-7 (CAN FD) specifications.
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*
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* @param can_dlc The DLC value (0-15)
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* @return The actual data length in bytes
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*/
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rt_uint8_t can_dlc2len(rt_uint8_t can_dlc);
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/**
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* @brief Convert data length to CAN DLC value
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*
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* Converts a data length in bytes to the appropriate CAN Data Length Code (DLC)
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* according to ISO 11898-1 and ISO 11898-7 (CAN FD) specifications.
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*
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* @param len The data length in bytes (0-64)
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* @return The corresponding DLC value (0-15)
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*/
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rt_uint8_t can_len2dlc(rt_uint8_t len);
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#endif /* __CAN_DM_H__ */
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