---
name: "Vector_BLF_MostSpy"
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_MostSpy"
---

# Vector\_BLF\_MostSpy(3)

MOST\_SPY.

## NAME

Vector::BLF::MostSpy - MOST\_SPY.

## SYNOPSIS

\#include \<MostSpy.h\>

Inherits **Vector::BLF::ObjectHeader**.

### 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::ObjectHeader** **ObjectHeader** (const ObjectType **objectType**, const uint16\_t **objectVersion**=0)\
 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 **dir** {}\
 uint8\_t **reservedMostSpy1** {}\
 uint32\_t **sourceAdr** {}\
 uint32\_t **destAdr** {}\
 std::array\< uint8\_t, 17 \> **msg** {}\
 uint8\_t **reservedMostSpy2** {}\
 uint16\_t **rTyp** {}\
 Control message sub type.  uint8\_t **rTypAdr** {}\
 Addressing mode.  uint8\_t **state** {}\
 Transmission state MOST25.  uint8\_t **reservedMostSpy3** {}\
 uint8\_t **ackNack** {}\
 uint32\_t **crc** {}\

Public Attributes inherited from **Vector::BLF::ObjectHeader** uint32\_t **objectFlags** {**ObjectFlags::TimeOneNans**}\
 object flags  uint16\_t **clientIndex** {}\
 client index of send node  uint16\_t **objectVersion** {0}\
 object specific version  uint64\_t **objectTimeStamp** {}\
 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::ObjectHeader** enum **ObjectFlags** : uint32\_t { **TimeTenMics** = 0x00000001, **TimeOneNans** = 0x00000002 }\

## Detailed Description

MOST\_SPY.

Message from MOST 25 Control Channel; received in spy mode (listen only).

## Member Function Documentation

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

Calculates the objectSize

**Returns**

object size

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

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

Read the data of this object

**Parameters**

*is* input stream

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

### void Vector::BLF::MostSpy::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::MostSpy::ackNack {}

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

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

Cyclic Redundancy Check

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

Target address

### uint8\_t Vector::BLF::MostSpy::dir {}

Direction of message events:

- •

  0: Rx (received)

- •

  1: Tx (transmit receipt)

- •

  2: Tx Request (transmit request)

### std::array\<uint8\_t, 17\> Vector::BLF::MostSpy::msg {}

17 data bytes

### uint8\_t Vector::BLF::MostSpy::reservedMostSpy1 {}

reserved

### uint8\_t Vector::BLF::MostSpy::reservedMostSpy2 {}

reserved

### uint8\_t Vector::BLF::MostSpy::reservedMostSpy3 {}

reserved

### uint16\_t Vector::BLF::MostSpy::rTyp {}

Control message sub type. Sub type of a MOST 25 Control message (see data sheet of OS8104 also).

- •

  0: Normal

- •

  1: RemoteRead

- •

  2: RemoteWrite

- •

  3: Alloc

- •

  4: Dealloc

- •

  5: GetSource

- •

  \>5: not used so far

### uint8\_t Vector::BLF::MostSpy::rTypAdr {}

Addressing mode. Addressing mode of MOST25 Control messages.

- •

  0x00: Device (logical node address)

- •

  0x10: Node position

- •

  0x20: Broadcast

- •

  0x30: Groupcast

- •

  0xFF: Unknown

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

Source address

### uint8\_t Vector::BLF::MostSpy::state {}

Transmission state MOST25. Transmission state of a MOST25 Control message.

- •

  Bit 0: Meaning:

- •

  0: bus inactive

- •

  1: bus active Restriction:

- •

  only for Dir = Rx (MOSTCtrl) or MOSTSpy

- •

  Bit 1: Meaning:

- •

  1: unlock event during transmission (Unl) Restriction:

- •

  only for Dir = Rx (MOSTCtrl) or MOSTSpy

- •

  Bit 4: Meaning:

- •

  1: acknowledged (Ack) Restriction:

- •

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

- •

  Bit 5: Meaning:

- •

  1: not acknowledged (NAck) Restriction:

- •

  only for Dir = Tx

- •

  Bit 6: Meaning:

- •

  Send result:

- •

  0: Transmission error (TxF)

- •

  1: OK Restriction:

- •

  only for Dir = Tx (MOSTCtrl)

## Author

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