I am in a project and I have to comply with ISO26262 so I need to verify my CAN frame. I am going to check my frame using the CRC calculation. My question is: Should I do this calculation in my program or does the CAN protocol already do it automatically?
Is CRC already calculated by CAN protocol?
1.5k Views Asked by Yasin Ahsen At
2
There are 2 best solutions below
0
Lundin
On
CAN contains a 15 bit CRC on the data-link layer. It is handled by the CAN controller and you don't need to do a thing in software, other than checking for errors reported by the controller.
Application layer CRC could be use in some special cases like when you are transferring large amounts of data such as bootloaders. But it isn't necessary for ordinary communication.
Related Questions in C
- Push mysql database script to server using git
- Git show's file path
- Git > diffs filtered, show only certain changed classes/files
- Pushing to git repository hosted by Visual studio online without entering user name and password
- How do I create my own Git branch to work on?
- Git init --bare giving error fatal: Out of memory? mmap failed: No such device
- Sub-directory into independent repository and later merge back into main repository
- How to find the Git Revision Hash in a synced SVN repo using SubGit?
- eclipse errors when try to change to master git branch
- How to have Heroku build my development branch on a staging server?
Related Questions in EMBEDDED
- Push mysql database script to server using git
- Git show's file path
- Git > diffs filtered, show only certain changed classes/files
- Pushing to git repository hosted by Visual studio online without entering user name and password
- How do I create my own Git branch to work on?
- Git init --bare giving error fatal: Out of memory? mmap failed: No such device
- Sub-directory into independent repository and later merge back into main repository
- How to find the Git Revision Hash in a synced SVN repo using SubGit?
- eclipse errors when try to change to master git branch
- How to have Heroku build my development branch on a staging server?
Related Questions in CAN-BUS
- Push mysql database script to server using git
- Git show's file path
- Git > diffs filtered, show only certain changed classes/files
- Pushing to git repository hosted by Visual studio online without entering user name and password
- How do I create my own Git branch to work on?
- Git init --bare giving error fatal: Out of memory? mmap failed: No such device
- Sub-directory into independent repository and later merge back into main repository
- How to find the Git Revision Hash in a synced SVN repo using SubGit?
- eclipse errors when try to change to master git branch
- How to have Heroku build my development branch on a staging server?
Related Questions in BUS
- Push mysql database script to server using git
- Git show's file path
- Git > diffs filtered, show only certain changed classes/files
- Pushing to git repository hosted by Visual studio online without entering user name and password
- How do I create my own Git branch to work on?
- Git init --bare giving error fatal: Out of memory? mmap failed: No such device
- Sub-directory into independent repository and later merge back into main repository
- How to find the Git Revision Hash in a synced SVN repo using SubGit?
- eclipse errors when try to change to master git branch
- How to have Heroku build my development branch on a staging server?
Related Questions in AUTOMOTIVE
- Push mysql database script to server using git
- Git show's file path
- Git > diffs filtered, show only certain changed classes/files
- Pushing to git repository hosted by Visual studio online without entering user name and password
- How do I create my own Git branch to work on?
- Git init --bare giving error fatal: Out of memory? mmap failed: No such device
- Sub-directory into independent repository and later merge back into main repository
- How to find the Git Revision Hash in a synced SVN repo using SubGit?
- eclipse errors when try to change to master git branch
- How to have Heroku build my development branch on a staging server?
Trending Questions
- UIImageView Frame Doesn't Reflect Constraints
- Is it possible to use adb commands to click on a view by finding its ID?
- How to create a new web character symbol recognizable by html/javascript?
- Why isn't my CSS3 animation smooth in Google Chrome (but very smooth on other browsers)?
- Heap Gives Page Fault
- Connect ffmpeg to Visual Studio 2008
- Both Object- and ValueAnimator jumps when Duration is set above API LvL 24
- How to avoid default initialization of objects in std::vector?
- second argument of the command line arguments in a format other than char** argv or char* argv[]
- How to improve efficiency of algorithm which generates next lexicographic permutation?
- Navigating to the another actvity app getting crash in android
- How to read the particular message format in android and store in sqlite database?
- Resetting inventory status after order is cancelled
- Efficiently compute powers of X in SSE/AVX
- Insert into an external database using ajax and php : POST 500 (Internal Server Error)
Popular # Hahtags
Popular Questions
- How do I undo the most recent local commits in Git?
- How can I remove a specific item from an array in JavaScript?
- How do I delete a Git branch locally and remotely?
- Find all files containing a specific text (string) on Linux?
- How do I revert a Git repository to a previous commit?
- How do I create an HTML button that acts like a link?
- How do I check out a remote Git branch?
- How do I force "git pull" to overwrite local files?
- How do I list all files of a directory?
- How to check whether a string contains a substring in JavaScript?
- How do I redirect to another webpage?
- How can I iterate over rows in a Pandas DataFrame?
- How do I convert a String to an int in Java?
- Does Python have a string 'contains' substring method?
- How do I check if a string contains a specific word?
Actually, you might not just rely on the CAN CRC itself in the case of ISO26262.
Because, the E2E protection (as it is called in AUTOSAR) consisting of CRC + SeqCounter, are done between two SWCs, in an ASIL-context.
The BSW is usually not ASIL. So, between the SWC providing the data to the BSW, and the receiving SWC checking the CRC, anything could happen in between. So, your BSW could put some flipped data into the CAN HW mailbox. The CAN HW will then build the wrong CRC when transmitting that data. Or the receiver might have a bug and flip the received data between the CAN mailbox and the actual receiving SWC end.