About BitEdit ECU Tuning Software

This document is intended to provide exhaustive guide on BitEdit features. In case you’ve found something missing, feel free to contact us, as we will try our best to keep this document up-to-date and as complete as possible.
If you seek frequently asked questions, see the following shorter help articles;
Working with Diff Viewer
Editing Map Axes
Grid Scales in BitEdit
Importing Maps From Another Binary
Parallel Maps Handling
Project System in BitEdit
Reverting Changes in BitEdit
Transferring BitEdit settings between PCs
Contents
About this document
Introduction and purpose of BitEdit
Available Modules and Pricing
Disclaimer
UI Overview and Glossary
Editor Glossary
Starting BitEdit
System requirements
Dongle
Organizing User Data
Project System
Version System
Application Data Folder
Feature Overview
Support and Bug Reporting Features
Enabling or Disabling the Project System
Opening or Creating a project
Importing Data from Another Binary
Saving the Binary File
Project Navigation
Map Editor
Map Tree Panel
Version Control
Map Editor
DTC Editor
Hex Dump Editor
Strings and Flags Editor
Diff Viewer
Map Pack Update Request Form
Other BitEdit Help Topics
Introduction and purpose of BitEdit
BitEdit is created for editing car ECU firmware, including fine-tuning of calibrations, editing DTC tables, and performing manual hex dump modifications.

Available Modules and Pricing
BitEdit comes with lots modules, each of which supports a different set of binary files. The modules are listed here.

Disclaimer
BitEdit development team is not responsible for potential damage caused by editing calibrations. This editor is intended for those who really know what they’re doing. Corrupting the calibrations may effectively brick your ECU.

UI Overview and Glossary
If at some point you will need to contact our support, knowing the proper names of the user interface elements will save you a lot of time explaining to us what happened and what do you need from us,

Editor Glossary;
Project — a set of binaries representing modifications of the same original binary, that is maintained as a whole by BitEdit, allowing the user to quickly switch between versions, view differences in a structured way, transfer changes selectively, etc.
Version — a modified copy, named and timestamped, of the binary, that is maintained within a project. See Version Control section of this document for details.
Document — a child window/tab opened in BitEdit, representing some meaningful part of the opened project. Includes Map Editors, Diff Views, Hex Editors.
Dialog — a modal window used for addition information requests and smaller editing tasks. As opposed to documents, the user may only operate one dialog window at a time.
Tool Panel — a dockable region dedicated to specific task. Examples are Map Tree, Version Control, and certain HexEdit tools like Diff Navigator.
Original version — The stock binary file, that is used for reference, and in many cases as percentage base when performing percentage increments and decrements during calibration editing
Current version — The modified binary file, that is currently shown in the Map Tree and all the open Documents, Dialogs and Tool Panels
Checkout — the action of switching to a particular named version in the Version Control Tool
Map Pack — the metadata that contains all the information necessary to edit the specific binary, including map addresses, data formats, axes, etc.
Map — a known region of the binary that contains data in known format, that could be meaningfully visualized as a 3D surface, or a 2D plot (curve). For example, Spark Advance Base shown below is a 3D surface with two axes (% and RPM);
Axis — the sequence of values that the map values are associated with. In 3D maps, there are 2 axes, and we usually call the first axis X axis, and the second one Y axis. Sometimes axes are stored in the binary, but sometimes they are purely logical. In the former case, user may edit the axis by clicking the Edit Axis button in the document toolbar. For example, the above image showcases two axes, % and RPM, associated with the Spark Advance Base map.
Parallel maps — a group of maps that share their semantic purpose (and sometimes even axes values), and therefore can be handled as a single map. If the editor is switched to Advanced mode, the user manually handles the process of transferring changes between particular maps in the same group, according to its changes transfer mode (see below). When BitEdit is in Simple mode, the changes are transferred automatically, and no individual maps are shown for such groups.
Changes Transfer Mode — The logic of transferring the changes between maps in the parallel map;
Copy As Is 1 means the parallel maps are kept completely equal
Copy Differences 2 means that the expression (Current – Original) is kept equal across all maps of the parallel map group
Copy Percentage Differences (3) means that the (Current / Original) ratios are kept equal across all maps of the parallel map group
DTC — Diagnostic Trouble Code. A DTC represents a type of code the vehicle’s onboard diagnostics system uses to alert you to a specific problem with some aspect of the vehicle. In BitEdit, a special DTC Editor dialog is used to activate or deactivate those;;
Hex Dump — a representation of the binary file in form of a sequence of bytes, words (2-byte integers), double-words (4-byte integers), or other formats in rarer situations. Available in BitEdit via Hex Editor Document;
Uniform grid — A 2D/3D map representation mode when the axes values are only shown, but not used to calculate the actual 3D geometry or 2D curve. Instead, this mode assumes that all axis points are equidistant from each other;
Scaled grid — A 2D/3D map representation mode opposite to the Uniform grid mode described above. The distance between axis points corresponds to the actual axis data read from the binary.
Diff — a document representing all differences between two specified versions in the current project. You can navigate the diff tree and see the details for the currently selected tree item;

Change by Delta — Increment or decrement mode when all affected cells receive the same increase or decrease, no matter the current or original value of the corresponding cell.
Change by Percent — Increment or decrement based on the specified percentage value. The percent base is always the ORIGINAL dump value, so the growth is still linear, but greater values will receive greater increases, unlike in Change by Delta mode.
Interpolated Change — Advanced operation on a rectangular selection that interpolates the four corner input values and applies the resulting delta matrix to the selected rectangular region.
Range Restrictions — Artificially imposed restrictions that prevent you from entering map data that is logically invalid, e.g. negative values for certain maps, or just too big numbers. You are always given an option to input these manually, compute from the current map data, or stick with Map Pack default values;
Starting BitEdit
System requirements
BitEdit runs on Windows 10 and above, and we do not support Windows 7 anymore. Internet connection is required.

Dongle
BitEdit requires a dongle to run. The dongle is a USB device that is used to store your license information. If you have a dongle, you can use it to run BitEdit on any computer, as long as the dongle is plugged in.

Organizing User Data
Project System
BitEdit uses a project system to organize your work. A project is a set of versions of the same binary file. Each version is a modified copy of the original binary file, with a name and a timestamp. You can switch between versions, view differences between versions, and transfer changes between versions.

BitEdit can also be switched to a mode where the project system is disabled. In this mode, you only work with the current binary file, with no advanced versioning (see below). This switch is located in the Options dialog (Options/Editing/Hints, Versions, Projects).

Version System
Version system is a part of the project system, so when the project system is disabled, the version system is disabled as well.

A version is a modified copy of the original binary file, with a name and a timestamp. You can switch between versions, view differences between versions, and transfer changes between versions.

For further details, see the Project System in BitEdit article.

Application Data Folder
BitEdit stores your projects, versions, and other data in the Application Data folder. This folder is located at C:\Users\<username>\AppData\Local\EasyTuner. This location can’t be changed, but you still might want to access it to back up your settings or see logs.

If the project system is enabled, then, by default, the projects are stored in the Projects subfolder. However, you may move the projects to another location by changing the Project Folder setting in the Options dialog (Options/Main Settings/Language and Paths).

Feature overview
Support and Bug Reporting Features
Hitting F12 takes a screenshot of the main window, and saves it to a file in BitEdit Logs Folder. Since the main BitEdit window is protected from Windows Screen Capturing features, this is useful if you want to report a bug, or ask for help with something.
Pressing Request Map Pack Update on the main tab of the Ribbon (or alternatively, in the File menu) allows you to request us to improve or fix the Map Pack associated with the binary file you’re currently working on. A dialog window will be opened, asking you to provide further details on what happened, and optionally, specify request urgency.
In the future, we may provide ready solutions for particular popular map packs. When BitEdit finds ready solutions available for the currently opened project, the Check for Solutions menu item in the Tools menu will become active, and the request button will also appear on the Main tab of the Ribbon.
Enabling or Disabling the Project System
BitEdit can operate in two different modes:

Projects Enabled: Each time you open a binary, BitEdit creates a project for it, allowing you to store many different versions of the binary, quickly switch between them, and compare binary file versions map-wise or in HEX mode. Projects are stored in a special folder, which you may relocate if you so desire (see below)
Projects Disabled: Versions are disabled, you only operate your current binary and its original versions, and can only analyze the diff between the current state and the stock binary that is loaded from our servers. In this mode, the Ribbon is simplified, the Project commands are removed from it, and the Save command is doing the same thing as Export Dump.

Opening or Creating a project
There are several ways to open your binary file in BitEdit;
If the project system is enabled, you can use the Project Browser to manage your projects. To open the Project Browser, click Open button in the Project section of the Ribbon;
if this is your first time opening this binary, you can either browse to it via File/Open Dump menu item, or via Binary/Open ribbon command;
alternatively, you can drag-n-drop the binary from Windows Explorer to BitEdit window, and BitEdit will automatically create a project from it, or just open it as a binary, if the project system is not currently enabled.
BitEdit keeps a list of the most recent files you’ve opened. To open a recent file, click File/Recent Files in the main menu, and then click the file you want to open.
Importing Data from Another Binary
Sometimes, maps are similar or identical in different binaries, and the process of transferring changes between projects could be automated. To try automatic transfer, invoke “Import Binary” function from File menu (Import Dump (Ctrl+I)) or from Main Ribbon tab (Binary/Import), and choose a binary file in the dialog to import the maps from.

If there are compatible maps available for the specified binary, a dialog window will appear, prompting the user to select some maps to import the values from.

Saving the Binary File
To save the modified binary, either press Ctrl+S, or invoke File/Save Dump in the File menu (in the Ribbon, it’s either Binary/Export if the Project System is enabled, or Binary/Save if it is disabled).
Project Navigation
Ctrl+F opens the Map Lookup that allows you to quickly open the Map Editor for any Map with its name matching your input
Ctrl+Tab cycles through open documents (Map Editors, Hex Editors and Diff Viewers)
Ctrl+W closes the active document
Double-clicking a map in the Map Tree opens its Editor as a new Document, or switches to its Editor if it has already been opened
Double-clicking “Edit Hex Dump” item in the Map Tree opens the Hex Editor document window
Double-clicking “Edit DTC” in the Map Tree opens the DTC Editor Dialog window;
Map Name;
2D Mode Hints on Mouse Over (on/off);
3D Mode Hints on Mouse Over (detailed/short/off);
3D Mode Hints on Mouse Drag-Editing (detailed/short/off);
Expand View Toggle (expands any region to fit the entire editor area) When expanded, the button turns into “Back to Split Screen”.
bullet Grid Mode Controls;

Gradient Highlighting Toggle;
Hex Value Display Toggle;
Unit Picker (for both axes and map values);
Edit Axis Values command (Can appear for both X and Y axes) This button only appears if the corresponding axis is actually editable. Note that sometimes axes are not stored in the dump;
Axis Name and Units (information, read-only).
bullet 3D Mode Controls:

Uniform/Scaled grid toggle (only affects the current document);
Data Point Display Toggle (if enabled, data points are emphasized on the 3D surface);
Original Surface Toggle (if enabled, the original surface will be drawn on top of the current surface in semi-transparent fashion);
3D Renderer Brightness Slider (allows adjusting overall 3D brightness);
3D Camera controls (elevation, rotation, zoom) Dragging left mouse button outside the surface will rotate the surface (you will notice the change of elevation and rotation). Mouse wheel controls the camera zoom.
bullet 2D Mode Controls:

Row/Column display toggle (you can plot the 2D curve from the rows or from the columns)
Uniform/Scaled grid toggle
Map and the axis value for which the curve is built (read-only)
Selection Mode Toggle (rectangular or linear)
Grid Lines Toggle
Lines And Points display mode
Only Lines display mode
Only Points display mode
Scale factors for lines and points (markers)
Row/Column slider (determines the row or column that is chosen to build the curve)
Below is the list of hotkeys and commands that are available in the Map Editor:

Clipboard Actions
Ctrl+A Select All
Ctrl+C Copy Selection
Ctrl+V Paste
Additionally, there is an option to copy the entire data table including the axes available from the Ribbon and from the Edit menu. However, pasting values back will only work if the map dimensions match the clipboard contents exactly. This allows the user to copy data from one project to another, or just export it when needed;

Data Display Mode
This only affects Grid Mode and 3D Mode;
Ctrl+1 Normal Values (default mode)
Ctrl+2 Differences (cur – orig)
Ctrl+3 Percents of Original (cur * 100.0 / orig)
Ctrl+4 Original Values (orig)
Data Modification Commands
Ctrl+E Set New Value
Ctrl+R Increase/Decrease by Value (add input value to current)
Ctrl+P Increase/Decrease by Percents (Add specified amount of percents of original to current)
Ctrl+U Restore Original (cur := orig)
Undo/Redo Operations
Ctrl+Z Reverts the last action that affected the dump
Ctrl+Y Repeats the last reverted action
In HEX Editor, Redo command has two different hotkeys, Ctrl+Y and Ctrl+Shift+Z, because the latter is more convenient for some users.

BitEdit Status Bar always shows the current state of the Undo/Redo Stack;
If you access the undo/redo stack via the Ribbon, you will also see the details on the revertible operations;
Keep in mind that the undo stack is global, and contains actions from all sources, including map editors and Hex Dump.

Range Restrictions
Accessible from Edit tab of the Ribbon, Range Restrictions are applied whenever you apply a change in any Map Editor, protecting the dump from receiving values that are too big or too small for the map in question.

Detect command (Ribbon/Edit/Range Restrictions) replaces the current range with minimum and maximum values currently present in the active map
Reset command replaces the current range with the corresponding data format min/max values, except for IEEE 754 float maps, which receive the pre-defined range of (–10000..+10001), because actual floating point minimum and maximum values are too big for practical use.
Increments and Decrements
BitEdit has several operations that increment or decrement stored values;
Minimal Increase/Decrease performs increment in dump units for integer-valued maps (non-float) X times, where X is the amount determined by the slider in the Change by Delta section in the Edit tab of the Ribbon. The shortcut key is just + / – on the NumPad;
Delta Increase/Decrease performs increment/decrement by specified delta, measured in map units;
Percent Increase/Decrease performs increment/decrement by specified amount of percents of original value. The amount of percents is specified in the Change by Percent section in the Edit tab of the Ribbon.
Absolute Changes
Set Value command in the Absolute Change section of the Edit tab of the Ribbon copies the same user input to all selected cells;
Restore Original command reverts the values of all selected cells to stock values.
Interpolated Change
This feature of the Edit tab of the Ribbon is designed to simplify working with rectangular regions in cases when the change or the absolute value is equal or close to some plane in 3D. The interpolation matrix is bilinear, and is generated from the four corner points (even though for precise planar shape, the 4th point should be calculated from the first three, since for a plane, BottomRight = BottomLeft+TopRight-TopLeft);
If, however, the input four points do not form a plane (with uniform grid), BitEdit calculates the interpolation matrix in the following way:

double topWidth = topRight – topLeft;
double bottomWidth = bottomRight – bottomLeft;
for (int i = 0; i < rows; i++) {
for (int j = 0; j < cols; j++) {
double t = (j * 1.0 / (cols – 1)) * topWidth + topLeft;
double b = (j * 1.0 / (cols – 1)) * bottomWidth + bottomLeft;
m[i, j] = (i * 1.0 / (rows – 1)) * (b – t) + t; }}

The user can apply the resulting matrix as either the replacement values (=), the deltas (+=), or the original percent deltas (+=%) by clicking the respective button on the Ribbon;

Editor Display Modes
Normal display mode is the default Map Editor mode. In this mode, the current values are displayed in all editor areas.
Difference display mode replaces the values shown in 3D and Grid areas with their differences compared to original values. 2D area remains unaffected by this.
Percent display mode only affects the Grid view. Not-a-number (NaN) values indicate the 0/0 situation (zero current, zero original); Signed Infinity values indicate the X/0 situation (nonzero current, zero original). 2D and 3D areas remain unaffected by this.
Original display mode only shows the stock values, temporarily hiding the current values. This only affects Grid and 3D areas, and in the Grid area, the cells containing changed values are still marked with dotted outlines, even though the modified values are not shown;