---
name: "Vector_BLF_Most150MessageFragment"
section: "3"
platform: "linux"
package: "vector-blf"
version: "2.4.2-2"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/Vector_BLF_Most150MessageFragment"
---

# Vector\_BLF\_Most150MessageFragment(3)

MOST\_150\_MESSAGE\_FRAGMENT.

## NAME

Vector::BLF::Most150MessageFragment - MOST\_150\_MESSAGE\_FRAGMENT.

## SYNOPSIS

\#include \<Most150MessageFragment.h\>

Inherits **Vector::BLF::ObjectHeader2**.

### Public Member Functions

void **read** (**AbstractFile** &is) override\
 void **write** (**AbstractFile** &os) override\
 uint32\_t **calculateObjectSize** () const override\

Public Member Functions inherited from **Vector::BLF::ObjectHeader2** **ObjectHeader2** (const ObjectType **objectType**)\
 void **read** (**AbstractFile** &is) override\
 void **write** (**AbstractFile** &os) override\
 uint16\_t **calculateHeaderSize** () const override\
 uint32\_t **calculateObjectSize** () const override\

Public Member Functions inherited from **Vector::BLF::ObjectHeaderBase** **ObjectHeaderBase** (const uint16\_t **headerVersion**, const ObjectType **objectType**)\
 **ObjectHeaderBase** (const ObjectHeaderBase &)=default\
 ObjectHeaderBase & **operator=** (const ObjectHeaderBase &)=default\
 **ObjectHeaderBase** (ObjectHeaderBase &&)=default\
 ObjectHeaderBase & **operator=** (ObjectHeaderBase &&)=default\

### Public Attributes

uint16\_t **channel** {}\
 application channel  uint8\_t **reservedMost150MessageFragment1** {}\
 uint8\_t **ackNack** {}\
 acknowledge code  uint32\_t **validMask** {}\
 bitfield indicating which members have valid data  uint32\_t **sourceAdr** {}\
 source address  uint32\_t **destAdr** {}\
 target address  uint8\_t **pAck** {}\
 a preemptive acknowledge code  uint8\_t **cAck** {}\
 CRC acknowledge from the packet receiver(s) to the packet transmitter.  uint8\_t **priority** {}\
 priority of the message  uint8\_t **pIndex** {}\
 packet index, increments per message on MOST  uint32\_t **crc** {}\
 Cyclic Redundancy Check.  uint32\_t **dataLen** {}\
 number of transmitted user data bytes  uint32\_t **dataLenAnnounced** {}\
 announced user data length at the start of the transmission  uint32\_t **firstDataLen** {}\
 number of bytes in firstData  uint32\_t **reservedMost150MessageFragment2** {}\
 std::vector\< uint8\_t \> **firstData** {}\
 variable data

Public Attributes inherited from **Vector::BLF::ObjectHeader2** uint32\_t **objectFlags** {**ObjectFlags::TimeOneNans**}\
 object flags  uint8\_t **timeStampStatus** {}\
 time stamp status  uint8\_t **reservedObjectHeader** {0}\
 uint16\_t **objectVersion** {0}\
 object specific version  uint64\_t **objectTimeStamp** {0}\
 object timestamp  uint64\_t **originalTimeStamp** {0}\
 original object timestamp

Public Attributes inherited from **Vector::BLF::ObjectHeaderBase** uint32\_t **signature** {ObjectSignature}\
 signature (ObjectSignature)  uint16\_t **headerSize** {}\
 sizeof object header  uint16\_t **headerVersion** {}\
 header version (1)  uint32\_t **objectSize** {}\
 object size  ObjectType **objectType** {ObjectType::UNKNOWN}\
 object type

### Additional Inherited Members

Public Types inherited from **Vector::BLF::ObjectHeader2** enum **ObjectFlags** : uint32\_t { **TimeTenMics** = 0x00000001, **TimeOneNans** = 0x00000002 }\
 enum **TimeStampStatus** : uint8\_t { **Orig** = 0x01, **SwHw** = 0x02, **User** = 0x10 }\

## Detailed Description

MOST\_150\_MESSAGE\_FRAGMENT.

Partial transmitted MOST50 or MOST150 Control Channel message. Fragments are reported from a network spy if the message transmission is corrupted or terminated.

## Member Function Documentation

### uint32\_t Vector::BLF::Most150MessageFragment::calculateObjectSize () const \[override\], \[virtual\]

Calculates the objectSize

**Returns**

object size

Reimplemented from **Vector::BLF::ObjectHeaderBase**.

### void Vector::BLF::Most150MessageFragment::read (AbstractFile & is) \[override\], \[virtual\]

Read the data of this object

**Parameters**

*is* input stream

Reimplemented from **Vector::BLF::ObjectHeaderBase**.

### void Vector::BLF::Most150MessageFragment::write (AbstractFile & os) \[override\], \[virtual\]

Write the data of this object

**Parameters**

*os* output stream

Reimplemented from **Vector::BLF::ObjectHeaderBase**.

## Member Data Documentation

### uint8\_t Vector::BLF::Most150MessageFragment::ackNack {}

acknowledge code AckNack holds the transmit status of a control message (see Transmit Status Register of OS8104 for MOST25).

- •

  Bit 0: Meaning:

- •

  1: no response (NoResp) Restriction:

- •

  only for Dir = Tx or spy messages

- •

  Bit 1: Meaning:

- •

  1: valid receipt (Valid) Restriction:

- •

  only for Dir = Tx or spy messages

- •

  Bit 2: Meaning:

- •

  1: CRC Error (CRCError) Restriction:

- •

  only for Dir = Tx or spy messages

- •

  Bit 3: Meaning:

- •

  1: receive buffer full (RxBufFull) Restriction:

- •

  only for Dir = Tx or spy messages

- •

  Bit 4: Meaning:

- •

  1: acknowledged (Ack) Restriction:

- •

  only for Dir = Tx or spy messages (always set to 1 for Rx messages in node mode)

- •

  Bit 5: Meaning:

- •

  1: negative acknowledge (NAck) Restriction:

- •

  only for Dir = Tx or spy messages

### uint8\_t Vector::BLF::Most150MessageFragment::cAck {}

CRC acknowledge from the packet receiver(s) to the packet transmitter. CRC acknowledge from the packet receiver(s) to the packet transmitter

- •

  0x00: No Response

- •

  0x01: CRC error

- •

  0x04: OK

### uint16\_t Vector::BLF::Most150MessageFragment::channel {}

application channel Application channel

### uint32\_t Vector::BLF::Most150MessageFragment::crc {}

Cyclic Redundancy Check. Cyclic Redundancy Check

### uint32\_t Vector::BLF::Most150MessageFragment::dataLen {}

number of transmitted user data bytes Number of transmitted user data bytes. These bytes were counted on bus.

Note: The number of bytes saved in this event is stored in firstDataLen.

### uint32\_t Vector::BLF::Most150MessageFragment::dataLenAnnounced {}

announced user data length at the start of the transmission Announced user data length at start of transmission. In some cases (e.g. sending to an invalid target address, receive buffer full of target device) the transmission is terminated before all data bytes have been sent. Then the counted number of bytes on bus is less than the announced data length (dataLen \< dataLenAnnonced). Due to rare and very specific bit errors (degrade of end termination byte) dataLen can also be greater than dataLenAnnonced.

### uint32\_t Vector::BLF::Most150MessageFragment::destAdr {}

target address Target address

### std::vector\<uint8\_t\> Vector::BLF::Most150MessageFragment::firstData {}

variable data Variable data

### uint32\_t Vector::BLF::Most150MessageFragment::firstDataLen {}

number of bytes in firstData Number of bytes stored in mFirstData (1524 max).

Note: In order to limit the size of this event not all counted bytes on bus will be stored in the payload of the logging event.

### uint8\_t Vector::BLF::Most150MessageFragment::pAck {}

a preemptive acknowledge code Pre-emptive acknowledge code

- •

  0x00: No Response

- •

  0x01: Buffer full

- •

  0x04: OK

### uint8\_t Vector::BLF::Most150MessageFragment::pIndex {}

packet index, increments per message on MOST Packet index, increments per message on MOST

### uint8\_t Vector::BLF::Most150MessageFragment::priority {}

priority of the message Priority

### uint8\_t Vector::BLF::Most150MessageFragment::reservedMost150MessageFragment1 {}

reserved

### uint32\_t Vector::BLF::Most150MessageFragment::reservedMost150MessageFragment2 {}

reserved

### uint32\_t Vector::BLF::Most150MessageFragment::sourceAdr {}

source address Source address

### uint32\_t Vector::BLF::Most150MessageFragment::validMask {}

bitfield indicating which members have valid data If a bit in the mask is set, the corresponding data field has been seen on the bus.

- •

  Bit 0: 0x00000001: dataLenAnnounced

- •

  Bit 1: 0x00000002: sourceAdr

- •

  Bit 2: 0x00000004: destAdr

- •

  Bit 3: 0x00000008: ackNack

- •

  Bit 4: 0x00000010: pAck

- •

  Bit 5: 0x00000020: pIndex

- •

  Bit 6: 0x00000040: piority

- •

  Bit 7: 0x00000080: crc

- •

  Bit 8: 0x00000100: cAck

- •

  Bit 9: 0x00000200: sourceMacAdr

- •

  Bit 10: 0x00000400: destMacAdr

- •

  Bit 31: 0x80000000: 0: MOST150 fragment; 1: MOST50 fragment

## Author

Generated automatically by Doxygen for Vector BLF from the source code.