Burst Transmission Function

The burst transmission function creates a high-load CAN bus state by sending messages continuously without wait time.
It can be used to evaluate transmit/receive behavior under heavy bus load.

Product Usage Image​

Burst transmission has the following two modes:

• 1Frame Mode: burst transmission of a single frame
• Log Mode: burst transmission using a log file

1Frame Mode​

In 1Frame Mode, a single frame is transmitted continuously without wait time.
Because bus load can be raised close to 100%, it is useful for evaluating whether a target ECU can transmit/receive correctly under heavy load.
In 1Frame Mode, CAN ID and payload can be configured freely.

Log Mode​

In Log Mode, frames in a log file are transmitted continuously without wait time.
By setting log frames to those expected by the target ECU, it can be used to evaluate continuous frame reception processing.

---

Basic Operation​

This section explains the basic flow for using burst transmission. Here, 1-frame burst transmission is used.

1. Select BurstTransmit in Simulation Window
   Open Simulation Window from menu or toolbar.
   Select BurstTransmit in Simulation Mode to display the burst transmission settings screen.

2. Confirm 1 Frame Mode is selected
   Confirm that 1 Frame Mode radio button is selected.
   By default, it is configured to continuously transmit a CAN FD frame with CAN ID 000 and DLC 64 bytes.

3. Start monitoring
   After burst settings are configured, start monitoring to execute burst transmission.
   Select Command -> Start in menu bar, or click toolbar button, or press F5.

---

BurstTransmit Screen Description​

No	Mode	Item	Description
1	1 Frame Mode	protocol	Set to CAN or CAN FD. Select from dropdown.
		Std./Ext	Set to standard ID (Std) or extended ID (Ext).
		ID	Set CAN ID (Hex).
		Type	Set Data or Remote frame. Selectable only when Protocol is CAN. When CAN-FD is selected, this item is read-only.
		DLC	Set DLC from dropdown. - For CAN: 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 - For CAN-FD: 0,1,2,3,4,5,6,7,8,12,16,20,24,32,48,64
		Data Set button	Set frame data. Clicking Set opens Data Setting dialog.
		Bit Rate Switch	Available when CAN FD frame is selected. - ON: enable data-phase baud rate configured in Device Window - OFF: disable data-phase baud rate and use arbitration-phase baud rate for all
		Stop button	Stops burst transmission.
2	Log Mode	Log File	Shows path and file name of log file to be loaded.
		button	Opens file selection dialog to choose log file. Note: Selecting a file does not load it. Click Load to read data (note1).
		Load button	Loads log file.
		Loop	Sets whether log replay transmission is repeated. If unchecked, system enters wait state after all log data is sent.
		Offset	Sets time from monitoring start to log replay start. When event trigger is set, this becomes time from event detection to replay start (note2).
		Stop button	Stops log replay transmission while running.
		Log data area	Displays loaded log file contents (note3).

note1: MicroPecker Analyzer log files cannot be loaded.
note2: can also be used to change 1s and 0.1s digits.
note3: In loaded log files, only data frames and remote frames are used; error records are ignored.

Event Trigger Settings​

You can start burst transmission in response to event trigger detection.

Item	Description
None	No event trigger is used.
Receive Trigger	Detects reception of specified CAN ID in CAN frame as event.
Receive Trigger(CAN-FD)	Detects reception of specified CAN ID in CAN FD frame as event.
Ext Trigger	Detects port input as event (note1).
Log Trigger	Detects specified monitoring log as event.
Key Trigger	Detects specified key input as event.

note1: Ext Trigger is under development and not available.

Receive Trigger / Receive Trigger(CAN-FD) settings​

Selecting Receive Trigger allows configuration of target received CAN ID used as event trigger.
Example use: transmit frames when specific CAN ID is received.

When Receive Trigger is selected, setting area appears. Set target CAN ID of received frame.

Item	Description
Format	Set standard ID (Std) / extended ID (Ext)
ID	Set trigger target CAN ID
Type	Set Data / Remote frame (CAN frames only)

Log Trigger settings​

Selecting Log Trigger allows configuration of log conditions used as events.
Detailed trigger conditions such as specific data and error frames can be set.

In Log Trigger, clicking opens Log Trigger dialog. Clicking Data Setting opens Data Setting dialog.

Log Trigger screen description​

Menu	Description
Setting display area	Displays log information used as trigger. Double-click opens Log Trigger setting dialog.
button	Opens Log Trigger setting dialog.

Log Trigger setting dialog​

Set condition details of logs to detect as trigger.

Item	Description	Setting Values
Ch	Target Ch (per MicroPeckerX)	Select from ALL / 1 / 2 / 3 / 4
InnerCh	Target internal Ch	Select from ALL / 1 / 2
Direction	Target Tx/Rx direction	R / T / R or T
State	Normal or error frame	OK / NG
Type	Target frame type	Select by State: OK: CAN-FD Frame, CAN Data Frame, Remote Frame NG: All Error, Bus Error, Error Warning, Error Passive, Bus Off Entry, Bus Off Recovery, Overload, Bus Lock, Arbitration Lost, Stuff Error, Form Error, Ack Error, CRC Error, Recessive Bit Error, Dominant Bit Error, Ack Delimiter Error
ID Format	CAN ID specification	Select standard (Std.) or extended (Ext.). CAN ID is Hex. If * is entered, CAN ID is not checked.
DLC	CAN data length	If * is entered, DLC is not checked.
Data Setting button	Open Data Setting dialog	-
[1]	Data area	Shows data set in Data Setting dialog.

Data Setting dialog​

Clicking Data Setting in Log Trigger dialog opens Data Setting dialog.
It allows data-condition configuration of target logs. Display format can be switched between Hex and Binary tabs.

Item	Description	Details
ID	CAN ID	CAN ID cannot be edited in Data Setting.
DLC	Data length	Data setting areas [2][3] change according to DLC setting. If * is entered, DLC is not checked.
[1]	Hex/Binary tab	Switches data display between Hex/Binary.
[2]	Per-byte setting area (note1)	Each cell represents 1 byte. Top-left cell is Data1. If * is entered, data is not checked.
[3]	Editor area (note1)	Data can be set in comma-separated byte format. If * is entered, data is not checked. Settings can be saved/loaded as CSV.
button	Load Data Setting file	Loads CSV saved by Data Setting.
button	Save Data Setting file	Saves Data Setting contents to CSV. Target is [3] settings.

note1: Data can be edited in either [2] or [3]. Both are synchronized.

Key Trigger settings​

Selecting Key Trigger allows keyboard input to be used as event trigger.
Example: transmit frames according to key input.

Item	Description	Details
[1]	Main key	Sets trigger key. Available: 0-9, A-Z, F1-F12, Space
[2]	Sub key	Sets modifier key combined with main key. Available: Shift, Ctrl, Alt