crc8 | crc8 implements the 8-bit cyclic redundancy check , or CRC-8 | Hashing library

by go-daq Go Version: Current License: BSD-3-Clause

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kandi X-RAY | crc8 Summary

crc8 is a Go library typically used in Security, Hashing applications. crc8 has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

crc8 implements the 8-bit cyclic redundancy check, or CRC-8. It's entirely copied from Go's standard library hash/crc32 with obvious edits to change the CRC-32 hash functions into CRC-8.

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Support

crc8 has a low active ecosystem.

It has 4 star(s) with 0 fork(s). There are 2 watchers for this library.

It had no major release in the last 6 months.

crc8 has no issues reported. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of crc8 is current.

Quality

crc8 has 0 bugs and 0 code smells.

Security

crc8 has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

crc8 code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

crc8 is licensed under the BSD-3-Clause License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

crc8 releases are not available. You will need to build from source code and install.

Top functions reviewed by kandi - BETA

kandi has reviewed crc8 and discovered the below as its top functions. This is intended to give you an instant insight into crc8 implemented functionality, and help decide if they suit your requirements.

makeTable creates a new Table from the given polynomial .
update returns the checksum of p .
MakeTable constructs a Table with the given polynomial .
Update updates p with the given CRC .
New returns a new Hash8 .
Checksum calculates the checksum of data .
Size returns the size of the digest .

Get all kandi verified functions for this library.

crc8 Key Features

No Key Features are available at this moment for crc8.

crc8 Examples and Code Snippets

No Code Snippets are available at this moment for crc8.

Community Discussions

Trending Discussions on crc8

CRC8 Slice-by-4 algorithm

Unable to get the correct CRC16 with a given Polynomial

Changing FLAC channel assignment to decorrelated left-side causes lost sync error status

Need 'built-in.o' error when compiling U-Boot

PEC calculation in Lua

Creating a crc8 function with lua

Write data to register with i2c in python

I want to read the ML-NTC2 temperature sensor value through Arduino. But I get error: invalid conversion from'char*' to'const uint8_t*'

Swift - CRC8 calculation conversion from C++

ESP32 build in Arduino IDE: undefined reference to `CLASS::function' error

QUESTION

CRC8 Slice-by-4 algorithm

Asked 2021-Nov-07 at 00:07

I am in need of a highly optimized CRC8 algorithm. My goal is to develop a Slice-by-4 solution as known from CRC16 / CRC32. I want to keep the code as close to the solution which I am using for CRC16 posted below.

Functions to generate the CRC LookUp-Table:

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ANSWER

Answered 2021-Nov-07 at 00:07

You didn't provide your polynomial, initial value, or final exclusive or. With those (and that the CRC in your case is not reflected), you can use crcany to generate the code for you.

Here is an example for little-endian slice-by-4:

Source https://stackoverflow.com/questions/69849859

QUESTION

Unable to get the correct CRC16 with a given Polynomial

Asked 2021-Nov-04 at 16:08

I'm struggling with an old radiation sensor and his communication protocol.
The sensor is event driven, the master starts the communication with a data transmission or a data request.
Each data telegram uses a CRC16 to check only the variable data block and a CRC8 to check all the telegram.

My main problem is the crc16, According to the datasheet the poly used to check the data block is:
CRC16 = X^14 + X^12 + X^5 + 1 --> 0x5021 ??

I captured some data with a valid CRC16 and tried to replicate the expected value in order to send my own data transmission, but I can't get the same value.
I'm using the sunshine CRC calculator trying any possible combination with that poly. I also try CRC Reveng but no results.

Here are a few data with the correct CRC16:.

...

ANSWER

Answered 2021-Nov-04 at 16:08

Looks like a typo on the polynomial. An n-bit CRC polynomial always starts with xⁿ. Like your correct 8-bit polynomial. The 16-bit polynomial should read X¹⁶ + X¹² + X⁵ + 1, which in fact is a very common 16-bit CRC polynomial.

To preserve the note in the comment, the four data bytes in the examples are swapped in each pair of bytes, which needs to be undone to get the correct CRC. (The control bytes in the CRC8 example are not swapped.)

So 14 00 00 0a becomes 00 14 0a 00, for which the above-described CRC gives the expected 0x1b84.

I would guess that the CRC is stored in the stream also swapped, so the message as bytes would be 00 14 0a 00 84 1b. That results in a sequence whose total CRC is 0.

Source https://stackoverflow.com/questions/69830626

QUESTION

Changing FLAC channel assignment to decorrelated left-side causes lost sync error status

Asked 2021-Sep-08 at 12:19

I have created a minimal stereo FLAC file according to the specifications here. It is a single block of 8192 samples of 0 encoded as a constant:

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ANSWER

Answered 2021-Sep-08 at 12:19

While the left, right and mid channels are 16 bit, the side channel needs to be 17 bit, because otherwise the side channel could clip or overflow.

For example, if at a certain point in the stream, the left channel is 32767 (the maximum positive integer when using signed 16-bit) and the right channel is -32768 (the maximum negative integer) the result when using left-side would be a side sample of -65535, which has to be stored with at least 17 bit.

I agree that this is something not mentioned clearly in the FLAC specification. See also this code on github.

Source https://stackoverflow.com/questions/68901078

QUESTION

Need 'built-in.o' error when compiling U-Boot

Asked 2021-Aug-25 at 08:17

I am trying to compile U-Boot for the developer board with armv7 processor. It has a Rockchip RK3288 processor. The commands I use are:

make evb-rk3288_defconfig
export CC=/opt/workspace/sdk/gcc-arm-10.3-2021.07-z86_64-arm-none-linux-gnueabihf/bin/arm-none-linux-gnueabihf-

export CC=/opt/workspace/sdk/gcc-linaro-7.5.0-2019.12-x86_64_arm-linux-gnueabihf/bin/arm-linux-gnueabihf-

and then

make ARCH=arm CROSS_COMPILE=$CC

I get an error when I try this way. The error I get is as follows:

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ANSWER

Answered 2021-Aug-25 at 08:17

The problem is due to incomplete or corrupted downloading of U-Boot files. It should download properly.

When compiling, the make ARCH=arm statement should be removed.

Source https://stackoverflow.com/questions/68828252

QUESTION

PEC calculation in Lua

Asked 2021-Aug-10 at 15:23

I am struggling to calculate the packet error code (PEC) of received data over I2C in order to know check if the data is valid. PEC Definition

I used the code stated in a previous question but it does not work for me.

The data looks like this: 0x00, 0x07, 0x01, 0x12, 0x3b, 0xd5

PEC is 0xd5 which is based on the polynomial = x^8+ x^2+ x^1+ x^0 - 0x107

This works also fine with this calculator.

So my question is, where is the difference between the code from the website and the one from the linked question:

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ANSWER

Answered 2021-Aug-10 at 15:23

This definition of CRC uses reversed bits in all data bytes.

Source https://stackoverflow.com/questions/68725593

QUESTION

Creating a crc8 function with lua

Asked 2021-Jul-07 at 18:01

Is there a simple algorithm to create a crc8 checksum from a table in lua? Polynomial should be x^8+x^5+x^4+1 (0x31) This algorithm will be used to check the UID of the DS28CM00 UID-chip. Here you can find a table returned by the chip (LS-byte last) :

...

ANSWER

Answered 2021-Jul-07 at 18:01

For Lua 5.3+

Source https://stackoverflow.com/questions/68280849

QUESTION

Write data to register with i2c in python

Asked 2021-Mar-30 at 17:43

I need to change value in MLX96014 temperature sensors eeprom with raspberry pi and python. I can read its ram and eeprom without problems, but I cant write to it. Also every python MLX96014 library that I find dont have this function implemented for some reason. I tried to do this with arduino and it works great with this function:

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ANSWER

Answered 2021-Mar-30 at 17:43

I dont know exactly why provided python code doesnt work but I have tried other i2c library and it started working. Here is the code snippet:

Source https://stackoverflow.com/questions/66835579

QUESTION

I want to read the ML-NTC2 temperature sensor value through Arduino. But I get error: invalid conversion from'char*' to'const uint8_t*'

Asked 2020-Dec-11 at 11:48

The arduino model name is wemos d1 mini and the board manager installed esp-8266. ML-NTC2 temperature sensor is Modbus 485 communication RTU method. Communication module is Esp-8266. http://comfilewiki.co.kr/ko/doku.php?id=ml-ntc2:index

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ANSWER

Answered 2020-Dec-11 at 11:48

The chain in that the functions are called is

Source https://stackoverflow.com/questions/65248169

QUESTION

Swift - CRC8 calculation conversion from C++

Asked 2020-Oct-15 at 23:47

As part of a project I'm working on with pulling data from a bluetooth device, I was provided a CRC8 function from the manufacturer to use. I'm writing the application in Swift, but the function they provided is in C++.

Below is the function they've provided in C++

...

ANSWER

Answered 2020-Oct-15 at 23:46

You have a few small mistakes. First, you are trying to perform the xor calculation on buf - this is the entire array; You need to access a single element buf[i].

Your second issue is that you can't index a sequence with a UInt8, so you need to make an Int equivalent in order to access the Table_CRC8 array.

Finally you are declaring x as a let (constant) outside the for loop, so you can't change it. You can move the declaration of x inside the for loop to address this.

Making these small changes will give you code that compiles:

Source https://stackoverflow.com/questions/64379287

QUESTION

ESP32 build in Arduino IDE: undefined reference to `CLASS::function' error

Asked 2020-Sep-18 at 14:54

I tried to write an Library for the Sensirion SFM3000 Flow Sensor in the Arduino IDE for an ESP32. As long as it was one sketch, everything worked. But as I tried to seperate it into an .h and .cpp file and implemented it as a class, I get some weird error when I try to compile the sketch.

...

ANSWER

Answered 2020-Sep-18 at 14:54

/*  calculate a CRC Byte, (Cyclic Redundancy Check) */
uint8_t crc8(const uint8_t data, uint8_t crc)
{
     crc ^= data;                     //crc XOR data
     for ( uint8_t i = 8; i; --i ) {
       crc = ( crc & 0x80 )           
       ? (crc << 1) ^ 0x31
       : (crc << 1);
    }
  return crc;
}

Source https://stackoverflow.com/questions/63957960

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