CrcSwift

---

Summary

Helper to easily generate CRC checksum in Swift. Validated by http://crccalc.com

Installation

Swift Package Manager

Once you have your Swift package set up, adding CrcSwift as a dependency is as easy as adding it to the dependencies value of your Package.swift.

dependencies: [
    .package(url: "https://github.com/ivanesik/CrcSwift.git", from: "0.0.3")
]

CocoaPods

To integrate CrcSwift into your Xcode project using CocoaPods, specify it in your Podfile:

pod 'CrcSwift', '~> 0.0.3'

Usage

// A401000AFF061101011300D3
var dataArray: [UInt8] = [0xA4, 0x01, 0x00, 0x0A, 0xFF, 0x06, 0x11, 0x01, 0x01, 0x13, 0x00, 0xD3]
var data = Data(dataArray)

// With Mode variables presets and `[UInt8]` input
CrcSwift.computeCrc8(data, mode: .cdma2000) // 0xbe
CrcSwift.computeCrc16(data, mode: .modbus) // 0x71CA
CrcSwift.computeCrc32(data, mode: .mpeg2) // 0x72E70589

// With Mode variables presets and `Data` input
CrcSwift.computeCrc8(dataArray, mode: .cdma2000) // 0xbe
CrcSwift.computeCrc16(dataArray, mode: .modbus) // 0x71CA
CrcSwift.computeCrc32(dataArray, mode: .mpeg2) // 0x72E70589

// Or you can manually set your CRC variables
let manualCrc16 = computeCrc16(
    data,
    initialCrc: 0x0000,
    polynomial: 0x8005,
    xor: 0x0000,
    refIn: true,
    refOut: true
)

Features

CRC-8, CRC-16, CRC-32 calculation with manual setting and most popular variables presets.

CRC-8:

• default
• cdma2000
• darc
• dvbS2
• ebu
• iCode
• itu
• maxim
• rohc
• wcdma

CRC-16:

• ccitt-false
• arc
• aug-ccitt
• buypass
• cdma2000
• dds-110
• dect-r
• dect-x
• dnp
• en-13757
• genibus
• maxim
• mcrf4xx
• t10-dif
• teledisk
• usb
• kermit
• modbus
• x-25
• xmodem
• riello
• tms37157
• a

CRC-32:

• default
• bzip2
• c
• d
• mpeg2
• posix
• sata
• q
• jamcrc
• xfer

TODO

• Table based calculation
• Tests in CI
• Pod lint in CI
• Fix watchos lint for CocoaPods

License

MIT licensed.