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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,126 @@ | ||
| #!/bin/bash | ||
| # https://github.com/PonomarevDA/tools/blob/main/can/create_slcan.sh | ||
| # This software is distributed under the terms of the MIT License. | ||
| # Copyright (c) 2023 Dmitry Ponomarev. | ||
| # Author: Dmitry Ponomarev <[email protected]> | ||
|
|
||
| SCRIPT_NAME=$(basename $BASH_SOURCE) | ||
| RED='\033[0;31m' | ||
| YELLOW='\033[0;33m' | ||
| NC='\033[0m' # No Color | ||
|
|
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| HELP="usage: $SCRIPT_NAME [--help] [--device <dev_path>] [--interface <interface>] [--only-find]. | ||
| The utility automatically finds a CAN-sniffer and creates SLCAN. | ||
| options: | ||
| -d, --device DEV_PATH Specify device path manually instead of trying to find it | ||
| among known sniffers. Example: /dev/ttyACM0. | ||
| -i, --interface INTERFACE Specify custom interface. By default it attach it to slcan0. | ||
| -o, --only-find Do not create the interface, only look for a sniffer. | ||
| -h, --help Show this help message and exit." | ||
|
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| INTERFACE=slcan0 | ||
| DEV_PATH="" | ||
| ONLY_FIND="no" | ||
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| function log_error() { | ||
| lineno=($(caller)) | ||
| printf "$RED$SCRIPT_NAME ERROR on line ${lineno}: $1!$NC\n" | ||
| } | ||
|
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| function log_warn() { | ||
| lineno=($(caller)) | ||
| printf "$YELLOW$SCRIPT_NAME WARN on line ${lineno}: $1.$NC\n" | ||
| } | ||
|
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||
| while [[ $# -gt 0 ]]; do | ||
| case $1 in | ||
| -d|--device) | ||
| DEV_PATH="$2" | ||
| shift | ||
| ;; | ||
|
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| -i|--interface) | ||
| INTERFACE="$2" | ||
| shift | ||
| ;; | ||
|
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| -o|--only-find) | ||
| ONLY_FIND="yes" | ||
| ;; | ||
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| -h|--help) | ||
| echo "$HELP" | ||
| [[ "${BASH_SOURCE[0]}" -ef "$0" ]] && exit 0 || return 0 | ||
| ;; | ||
|
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||
| *) | ||
| log_error "Unknown option: $1" | ||
| echo "$HELP" | ||
| [[ "${BASH_SOURCE[0]}" -ef "$0" ]] && exit 0 || return 1 | ||
| ;; | ||
| esac | ||
| shift | ||
| done | ||
|
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||
| function find_sniffer() { | ||
| KNOWN_SNIFFERS=( | ||
| "ID_MODEL_ID=374b|ID_VENDOR_ID=0483" # RaccoonLab programmer-sniffer | ||
| "ID_MODEL_ID=60c7|ID_VENDOR_ID=1d50" # Zubax Babel-Babel | ||
| ) | ||
|
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| EXPECTED_DEV_PATH="/dev/ttyACM*" | ||
| EXPECTED_SYMLINK_PATH="/dev/serial/by-id/" | ||
| for dev_path in $EXPECTED_DEV_PATH; do | ||
| [ -e "$dev_path" ] || continue | ||
| for sniffer in ${KNOWN_SNIFFERS[@]}; do | ||
| is_sniffer=$(udevadm info $dev_path | grep -E "($sniffer)" -wc || true) | ||
| if [ "$is_sniffer" == 2 ]; then | ||
| DEV_PATH=$(find -L $EXPECTED_SYMLINK_PATH -samefile $dev_path) | ||
| break | ||
| fi | ||
| done | ||
| done | ||
| } | ||
|
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||
| function create_slcan() { | ||
| sudo slcand -o -c -f -s8 -t hw -S 1000000 $DEV_PATH $INTERFACE | ||
| sleep 1 # without sleep next commands may fail with 'Cannot find device "slcan0"' | ||
| sudo ip link set up $INTERFACE | ||
| sudo tc qdisc add dev $INTERFACE root handle 1: pfifo_head_drop limit 1000 | ||
| } | ||
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| # Step 1. Define the device path | ||
| if [ -z $DEV_PATH ]; then | ||
| find_sniffer | ||
|
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| if [ -z "$DEV_PATH" ]; then | ||
| log_error "Can't find a sniffer" | ||
| [[ "${BASH_SOURCE[0]}" -ef "$0" ]] && exit 0 || return 1 | ||
| fi | ||
|
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||
| if [[ $ONLY_FIND == "yes" ]]; then | ||
| echo "$DEV_PATH" | ||
| [[ "${BASH_SOURCE[0]}" -ef "$0" ]] && exit 0 || return 0 | ||
| fi | ||
| fi | ||
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| # Step 2. Create SLCAN based on device path | ||
| echo "SLCAN creator settings: | ||
| - DEV_PATH=$DEV_PATH | ||
| - INTERFACE=$INTERFACE" | ||
|
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| if [[ $(ifconfig | grep $INTERFACE) ]]; then | ||
| log_warn "specified interface already exist, skip" | ||
| [[ "${BASH_SOURCE[0]}" -ef "$0" ]] && exit 0 || return 1 | ||
| fi | ||
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| create_slcan | ||
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| if [[ -z $(ifconfig | grep $INTERFACE) ]]; then | ||
| log_error "Interface '$INTERFACE' has not been successfully created" | ||
| [[ "${BASH_SOURCE[0]}" -ef "$0" ]] && exit 0 || return 1 | ||
| fi |
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