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184
sys/hex2fw.sh
Executable file
184
sys/hex2fw.sh
Executable file
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#!/bin/sh
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# shellcheck disable=SC2034,SC2317
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# Скрипт преобразования hex в fw.
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# В качестве параметра принимает путь к файлу hex.
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# https://srecord.sourceforge.net/
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# https://manpages.ubuntu.com/manpages/xenial/man1/srec_cat.1.html
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# https://manpages.ubuntu.com/manpages/xenial/man1/srec_examples.1.html
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# echo -e "\033[0;32m~~~ Hex to FW ~~~\033[0m";
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PATH=$(pwd)/$(dirname "$0")/srecord:$PATH
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PATH="C:/Program Files/Git/usr/bin/":$PATH
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#========================== Functions ==========================
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# ByteString - ascii string with bytes separated by spaces like "00 11 22 33"
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HexStringToByteString() { printf "%s" "$1" | od -An -t x1 | tr -d '\n' | tr 'a-f' 'A-F' | awk '{$1=$1};1' | tr -d '\n'; }
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GetRandomByteString() { openssl rand "$1" | od -An -t x1 | tr -d '\n' | tr 'a-f' 'A-F' | awk '{$1=$1};1' | tr -d '\n'; }
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IntelHexFileToByteString()
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{
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T=$(srec_cat "$1" -intel -fill 0xFF -over "$1" -intel -address-length=4 -o - -ascii_hex)
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res1=0x$(echo "$T" | head -n 1 | cut -f1 -d , | sed "s/.*\$A//") # Output: start addr
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T=$(echo "$T" | tr -d '\r' | tr '\n' ' ' | tr '\002\003' ',')
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T=$(echo "$T" | cut -f3 -d , | awk '{$1=$1};1') # (awk '{$1=$1};1' - remove leading, trailing and extra spaces between fields)
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res2=$(echo "$T" | wc -w) # Output: size in bytes
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res3=$T # Output: byte string
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}
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# parmeters: addr fieldsnum string
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GetFieldsFromByteString() { echo "$3" | cut -d ' ' -f "$1"-$(($1 + $2 - 1)); }
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# parmeters: addr fieldsnum string
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GetHexFromByteString() { printf 0x; GetFieldsFromByteString "$1" "$2" "$3" | awk '{print $4,$3,$2,$1}' | tr -d ' '; }
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# parmeters: addr fieldsnum string
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GetStringFromByteString() { GetFieldsFromByteString "$1" "$2" "$3" | xxd -r -p | tr -d '\000'; }
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ByteStringToAsciiHex()
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{
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printf "\002 \$A%08X,\n" "$1" # Start and Address
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echo "$2" | fold -s -w48 | awk '{$1=$1};1' # Data (awk '{$1=$1};1' - remove leading, trailing and extra spaces between fields)
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printf "\003" # The End
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}
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CRC32_FromByteString()
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{
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# CAN прошивка использует кривой MPEG2 CRC32 по историческим причинам
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# В будущем надо исправить на нормальный CRC32 от STM32
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T=$(ByteStringToAsciiHex 0x10000000 "$1")
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T=$(echo "$T" | srec_cat - -ascii_hex -Bit_Reverse 4 -stm32 0 -Bit_Reverse 4 -xor 0xFF -o -ascii_hex)
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echo "$T" | tr -d '\002\003' | head -n 2 | tail -n 1 | cut -d ' ' -f1-4
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}
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HexToByteString() { echo "$1" | sed 's/^0x//' | fold -w2 | tac | tr '\n' ' ' | sed 's/ $//'; }
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#========================== Main code ==========================
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IntelHexFileToByteString "$1"
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fw_start_addr=$res1
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# echo "fw_start_addr $fw_start_addr"
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fw_size=$res2
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# echo "fw_size $fw_size"
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fw_data=$res3
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# echo "fw_data: $fw_data"
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# выкидываем последние 4 байта и дописываем наше CRC
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fw_data=$(GetFieldsFromByteString 1 $((fw_size - 4)) "$fw_data")
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crc=$(CRC32_FromByteString "$fw_data")
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fw_data="$fw_data $crc"
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# echo "fw_data: $fw_data"
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struct_addr=$(GetHexFromByteString 1 4 "$fw_data")
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# echo "struct_addr $struct_addr"
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struct_offset=$(( struct_addr - fw_start_addr ))
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# echo "struct_offset $struct_offset"
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# // Структура массива информации о CAN-прошивке
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# struct TCanFwInfo {
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# TVersion Version; // Версия ПО
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# uint32_t Build; // Хеш коммита в репозитории git
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# uint32_t const * pCRC32; // Адрес, где расположена CRC32
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# uint32_t reserved2;
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# uint8_t TextInfo[64]; // Текстовая информация
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# } __attribute__((packed, aligned(4)));
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# // описание прошивки
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# const TCanFwInfo gCanFwInfo =
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# {
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# (CAN_FW_VERSION << 24) | BUILD_DATE, // Version - Версия ПО
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# GIT_BUILD, // Хеш коммита в репозитории git
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# &CanChksum, // *pCRC32 - Адрес, где расположена CRC32
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# 0, // reserved2
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# M_NAME CAN_FW_DESCRIPTION "_" GIT_VERSION // TextInfo[64] - Текстовая информация
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# };
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index=$(( struct_offset + 1 ))
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day=$(GetFieldsFromByteString "$index" 1 "$fw_data")
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# echo "day: $day"
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index=$(( index + 1 ))
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mounth=$(GetFieldsFromByteString "$index" 1 "$fw_data")
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# echo "mounth: $mounth"
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index=$(( index + 1 ))
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year=$(GetFieldsFromByteString "$index" 1 "$fw_data")
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# echo "year: $year"
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index=$(( index + 1 ))
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can_fw_version=$(GetFieldsFromByteString "$index" 1 "$fw_data")
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# echo "can_fw_version: $can_fw_version"
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index=$(( index + 1 ))
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git_build=$(GetFieldsFromByteString "$index" 4 "$fw_data")
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# echo "git_build: $git_build"
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index=$(( index + 4 ))
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CRC_addr=$(GetHexFromByteString "$index" 4 "$fw_data")
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# echo "CRC_addr: $CRC_addr"
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index=$(( index + 8 ))
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text_info=$(GetStringFromByteString "$index" 64 "$fw_data")
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# echo "text_info: $text_info"
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# Версия git в последнем поле после '_'
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git_version=$(echo "$text_info" | awk -F '_' '{print $NF}')
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# echo "git_version: $git_version"
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# struct TFirmwareHdr {
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# uint32_t ChckSum; // вычисляется по всем нижеследующим полям и данным
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# uint32_t Type; // тип прошивки
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# uint32_t Version; // версия/дата
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# uint32_t Build; // Билд прошивки
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# uint32_t Len; // длина данных
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# uint32_t Offset; // смещение прошивки во flash
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# uint8_t InitVect[8]; // Случайное число, используется при дешифровании
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# }; // sizeof() = 32
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# struct TFirmwareFileHdr {
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# uint8_t Sign[8]; // fixed to 'MOBICAR '
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# uint8_t Desc[64]; // текстовое описание
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# uint8_t pad1[24]; // дополнение до 96 байт
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# TFirmwareHdr bin_hdr;
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# }; // sizeof() = 128
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# hdr1 - заголовок до CRC
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hdr1="MOBICAR version $can_fw_version$year$mounth$day, $day.$mounth.$year, GIT = $git_version"
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# echo "hdr1: $hdr1"
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length=$(( ${#hdr1} ))
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# echo "length: $length"
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hdr1=$(HexStringToByteString "$hdr1")
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# Добиваем остаток до TFirmwarehdr (8+64+24=96)
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for i in $(seq $(( length + 1 )) 96); do
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hdr1="$hdr1 00"
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done
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# printf "hdr1:\n%s\n" "$hdr1"
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# hdr2 - заголовок после CRC
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hdr2="02 00 00 00" # тип прошивки (CAN)
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hdr2="$hdr2 $day $mounth $year $can_fw_version" # версия/дата
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hdr2="$hdr2 $git_build" # Хеш коммита в репозитории git
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len=$(printf "%08X" "$fw_size") # Len (Длина данных)
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len=$(HexToByteString "$len")
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hdr2="$hdr2 $len"
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offset=$(printf "%08X" "$fw_start_addr") # offset (смещение прошивки во flash)
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offset=$(HexToByteString "$offset")
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hdr2="$hdr2 $offset"
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rand=$(GetRandomByteString 8)
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# echo "rand: $rand"
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hdr2="$hdr2 $rand"
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# printf "hdr2:\n%s\n" "$hdr2"
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crc=$(CRC32_FromByteString "$hdr2 $fw_data")
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# printf "crc:\n%s\n" "$crc"
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fw="$hdr1 $crc $hdr2 $fw_data"
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# printf "fw:\n%s\n" "$fw" | fold -w48
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fw_path="$(dirname "$1")/$text_info.fw"
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printf "Generate \033[0;32m%s\033[0m\n" "$fw_path"
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ByteStringToAsciiHex 0 "$fw" | srec_cat - -ascii_hex -o "$fw_path" -binary
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