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# ISO-TP configuration options
# Copyright (c) 2019 Alexander Wachter
# SPDX-License-Identifier: Apache-2.0
menuconfig ISOTP
bool "ISO-TP Transport [EXPERIMENTAL]"
select NET_BUF
select POLL
select EXPERIMENTAL
help
Enable ISO TP support for CAN
if ISOTP
module = ISOTP
module-str = ISOTP
source "subsys/logging/Kconfig.template.log_config"
config ISOTP_WFTMAX
int "WFTmax (Max WAIT frames before aborting)."
default 10
range 0 254
help
This value defines the maximum number of WAIT frames before the transmission
is aborted.
config ISOTP_BS_TIMEOUT
int "Bs timeout [ms] (timeout for receiving the frame control)"
default 1000
range 200 10000
help
Timeout for the reception of the next FC frame. ISO 15765-2: 1000ms
config ISOTP_A_TIMEOUT
int "Ar and As timeout [ms] (sending and receiving timeout)"
default 1000
range 200 10000
help
As (sender transmit timeout) and Ar (receiver transmit timeout).
ISO 15765-2: 1000ms
config ISOTP_CR_TIMEOUT
int "Cr timeout [ms] (timeout for consecutive frames)"
default 1000
range 200 10000
help
Cr (receiver consecutive frame) timeout.
ISO 15765-2: 1000ms
config ISOTP_REQUIRE_RX_PADDING
bool "Require padding for received messages"
help
If enabled, SFs and the last CF must always have a DLC of 8 bytes
(for classic CAN) and unused bytes must be padded by the sending
device. This setting allows to be compliant to AUTOSAR Specification
of CAN Transport Layer.
By default, received CAN frames with or without padding are accepted.
config ISOTP_ENABLE_TX_PADDING
bool "Enable padding for transmitted messages"
help
Add padding bytes 0xCC (as recommended by Bosch) if the PDU payload
does not fit exactly into the CAN frame.
config ISOTP_RX_BUF_COUNT
int "Number of data buffers for receiving data"
default 4
help
Each data buffer will occupy ISOTP_RX_BUF_SIZE + smallish
header (sizeof(struct net_buf)) amount of data.
config ISOTP_RX_BUF_SIZE
int "Size of one buffer data block"
default 56
help
This value defines the size of a single block in the pool. The number of
blocks is given by ISOTP_RX_BUF_COUNT. To be efficient use a multiple of
CAN_DL - 1 (for classic can : 8 - 1 = 7).
config ISOTP_RX_SF_FF_BUF_COUNT
int "Number of SF and FF data buffers for receiving data"
default 4
help
This buffer is used for first and single frames. It is extra because the
buffer has to be ready for the first reception in isr context and therefor
is allocated when binding.
Each buffer will occupy CAN_DL - 1 byte + header (sizeof(struct net_buf))
amount of data.
config ISOTP_USE_TX_BUF
bool "Buffer tx writes"
default n
help
Copy the outgoing data to a net buffer so that the calling function
can discard the data.
if ISOTP_USE_TX_BUF
config ISOTP_TX_BUF_COUNT
int "Number of data buffers for sending data"
default 4
help
Each data buffer will occupy CONFIG_NET_BUF_DATA_SIZE + smallish
header (sizeof(struct net_buf)) amount of data. If context buffers
are used, use the same size here.
config ISOTP_BUF_TX_DATA_POOL_SIZE
int "Size of the memory pool where buffers are allocated from"
default 256
help
This value defines the size of the memory pool where the buffers
for sending are allocated from.
endif # ISOTP_USE_TX_BUF
config ISOTP_ENABLE_CONTEXT_BUFFERS
bool "Enable buffered tx contexts"
default y
help
This option enables buffered sending contexts. This makes send and
forget possible. A memory slab is used to buffer the context.
config ISOTP_TX_CONTEXT_BUF_COUNT
int "Amount of context buffers for sending data"
default 4
depends on ISOTP_ENABLE_CONTEXT_BUFFERS
help
This defines the size of the memory slab where the buffers are
allocated from.
endif # ISOTP