> ## Documentation Index
> Fetch the complete documentation index at: https://notevil.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# CAPLfunctionChkStartLinSynchBreakTimingViolation

# ChkStart\_LINSynchBreakTimingViolation

[Valid for](../../../Shared/FeatureAvailability.md): CANoe DE • CANoe4SW DE

## Function Syntax

```c theme={null}
dword ChkStart_LINSynchBreakTimingViolation (dword MinBreakLen, dword MaxBreakLen);
dword ChkStart_LINSynchBreakTimingViolation (dword MinBreakLen, dword MaxBreakLen, char[] CaplCallback);
```

## Description

Checks the timing of the synchronization break field in LIN headers.

An event will be generated, if the measured length \[in bit times] of break low phase is outside of the specified range.

## Parameters

* **MinBreakLen**
  * `0`: Minimum length of break low phase shall not be checked
  * `\>0`: Minimum allowed length of break low phase
  * Unit: bit time

* **MaxBreakLen**
  * `0`: Maximum length of break low phase shall not be checked
  * `\>0`: Maximum allowed length of break low phase
  * Unit: bit time

* **CaplCallback**
  * Name of CAPL callback function to be called on generated event. In simulation nodes this parameter has to be set. In test modules this parameter is optional.

## Return Values

* **0**: Check could not be created and must not be referenced
* **> 0**: Check was created successfully and may be referenced using the returned (handle-) value.

## Possible Errors

* Range specified for synch break length is invalid
* CAPL callback does not exist

## Check-specific Queries

* [ChkQuery\_EventTiming](CAPLfunctionChkQueryEventTiming.md)
* [ChkQuery\_EventInterval](CAPLfunctionChkQueryEventInterval.md)
* [ChkQuery\_EventMessageId](CAPLfunctionChkQueryEventMessageId.md)

## Example

```c theme={null}
...
dword checkId;
ChkConfig_SetPrecision(9); // switch to ns precision
// Create and start the check for LIN break low phase violation
checkId = ChkStart_LINSynchBreakTimingViolation(13, 20, "LINSynchBreakCallback"); 
ChkConfig_SetPrecision(3); // switch to ms precision (default)
...
// CAPL callback for violation notification
void LINSynchBreakCallback (dword aCheckId)
{
   ChkQuery_EventStatusToWrite(aCheckId);
}
```