125 lines
3.0 KiB
C
125 lines
3.0 KiB
C
/*
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* Copyright (c) 2019 Alexander Wachter
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef ZEPHYR_SUBSYS_NET_CAN_ISOTP_INTERNAL_H_
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#define ZEPHYR_SUBSYS_NET_CAN_ISOTP_INTERNAL_H_
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#include <canbus/isotp.h>
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#include <sys/slist.h>
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/*
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* Abbreviations
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* BS Block Size
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* CAN_DL CAN LL data size
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* CF Consecutive Frame
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* CTS Continue to send
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* DLC Data length code
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* FC Flow Control
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* FF First Frame
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* SF Single Frame
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* FS Flow Status
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* AE Adders Extension
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* SN Sequence Number
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* ST Separation time
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* PCI Process Control Information
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*/
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/* This is for future use when we have CAN-FD */
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#ifdef ISOTP_USE_CAN_FD
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/* #define ISOTP_CAN_DL CONFIG_ISOTP_TX_DL* */
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#define ISOTP_CAN_DL 8
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#else
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#define ISOTP_CAN_DL 8
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#endif/*ISOTP_USE_CAN_FD*/
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/* Protocol control information*/
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#define ISOTP_PCI_SF 0x00 /* Single frame*/
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#define ISOTP_PCI_FF 0x01 /* First frame */
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#define ISOTP_PCI_CF 0x02 /* Consecutive frame */
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#define ISOTP_PCI_FC 0x03 /* Flow control frame */
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#define ISOTP_PCI_TYPE_BYTE 0
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#define ISOTP_PCI_TYPE_POS 4
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#define ISOTP_PCI_TYPE_MASK 0xF0
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#define ISOTP_PCI_TYPE_SF (ISOTP_PCI_SF << ISOTP_PCI_TYPE_POS)
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#define ISOTP_PCI_TYPE_FF (ISOTP_PCI_FF << ISOTP_PCI_TYPE_POS)
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#define ISOTP_PCI_TYPE_CF (ISOTP_PCI_CF << ISOTP_PCI_TYPE_POS)
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#define ISOTP_PCI_TYPE_FC (ISOTP_PCI_FC << ISOTP_PCI_TYPE_POS)
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#define ISOTP_PCI_SF_DL_MASK 0x0F
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#define ISOTP_PCI_FF_DL_UPPER_BYTE 0
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#define ISOTP_PCI_FF_DL_UPPER_MASK 0x0F
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#define ISOTP_PCI_FF_DL_LOWER_BYTE 1
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#define ISOTP_PCI_FS_BYTE 0
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#define ISOTP_PCI_FS_MASK 0x0F
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#define ISOTP_PCI_BS_BYTE 1
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#define ISOTP_PCI_ST_MIN_BYTE 2
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#define ISOTP_PCI_FS_CTS 0x0
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#define ISOTP_PCI_FS_WAIT 0x1
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#define ISOTP_PCI_FS_OVFLW 0x2
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#define ISOTP_PCI_SN_MASK 0x0F
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#define ISOTP_FF_DL_MIN (ISOTP_CAN_DL)
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#define ISOTP_STMIN_MAX 0xFA
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#define ISOTP_STMIN_MS_MAX 0x7F
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#define ISOTP_STMIN_US_BEGIN 0xF1
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#define ISOTP_STMIN_US_END 0xF9
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#define ISOTP_WFT_FIRST 0xFF
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#define ISOTP_BS K_MSEC(CONFIG_ISOTP_BS_TIMEOUT)
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#define ISOTP_A K_MSEC(CONFIG_ISOTP_A_TIMEOUT)
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#define ISOTP_CR K_MSEC(CONFIG_ISOTP_CR_TIMEOUT)
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/* Just before the sender would time out*/
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#define ISOTP_ALLOC_TIMEOUT K_MSEC(CONFIG_ISOTP_A_TIMEOUT - 100)
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#ifdef __cplusplus
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extern "C" {
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#endif
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enum isotp_rx_state {
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ISOTP_RX_STATE_WAIT_FF_SF,
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ISOTP_RX_STATE_PROCESS_SF,
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ISOTP_RX_STATE_PROCESS_FF,
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ISOTP_RX_STATE_TRY_ALLOC,
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ISOTP_RX_STATE_SEND_FC,
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ISOTP_RX_STATE_WAIT_CF,
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ISOTP_RX_STATE_SEND_WAIT,
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ISOTP_RX_STATE_ERR,
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ISOTP_RX_STATE_RECYCLE,
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ISOTP_RX_STATE_UNBOUND
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};
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enum isotp_tx_state {
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ISOTP_TX_STATE_RESET,
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ISOTP_TX_SEND_SF,
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ISOTP_TX_SEND_FF,
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ISOTP_TX_WAIT_FC,
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ISOTP_TX_SEND_CF,
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ISOTP_TX_WAIT_ST,
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ISOTP_TX_WAIT_BACKLOG,
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ISOTP_TX_WAIT_FIN,
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ISOTP_TX_ERR
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};
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struct isotp_global_ctx {
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sys_slist_t alloc_list;
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sys_slist_t ff_sf_alloc_list;
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};
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#ifdef __cplusplus
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}
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#endif
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#endif /* ZEPHYR_SUBSYS_NET_CAN_ISOTP_INTERNAL_H_ */
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