Version 1.10 released April 3rd 2022
- Added support for 16th general purpose output on units with serial 300 and
  up.
- Added H bridge support to general purpose PID functions.
- Added DBC file export in CAN broadcast function.
- High speed governor can now act on a user specified speed source to control 
  wheel speed or something other than engine speed.
- Synchronous suction control valve strategy allows tuning in pulse width as
  well as crank angle now.
- Added general purpose rail pressure target trim.
- Added tachometer test function.
- Fixed bug where recorded injector faults would not clear when clearing fault
  codes.
- Fixed bug where injector outputs would cut out if injection angle got too
  close to the maximum permitted advance.

Version 1.9 released January 16th 2022
- Added clustering mode allowing two  ECUs joined together to control
  engines with up to 16 cylinders.
- Updated custom strategies virtual machine to allow declaration of
  variables kept in non-volatile memory which keep their value when ECU is
  powered off.
- Added a dedicated high speed governor function for soft rev limiting or
  variable load operation (generators, pumps, etc)
- Starter control now allows restarting if engine stalls without restarting
  ECU first.

Version 1.8 released December 18th 2021
Enforces the use of an ECU controlled main relay on newer units (S/N 200 and
up). See manual at https://controls.is/manuals/did1.pdf for clarification.
Plug and play OM61x applications (any factory Mercedes wiring) is already
wired correctly.
An ECU with a serial number of 200 or greater will not start without
receiving 12 volts from ignition switch on either pin 2/13 or 3/31.
The ECU must then be powered on by a relay that has its coil powered
from direct battery power (relay terminal 86 directly to battery) and coil
negative (relay terminal 85) must be controlled by pin 3/46 on DID1.
The purpose of this arrangement is to keep the ECU powered on while the
engine is being shut down. This is necessary to prevent fuel system damage
on engines that use a CP3 or similar injection pump whith a normally open
suction control valve which would otherwise generate excessive fuel pressure
while the engine spins down.
This also serves to prevent ECU damage that is possible if power is lost
while an injection event is going on.
Other notable changes:
- Cruise control now offers continuous acceleration/deceleration and not just
  increasing or decreasing speed one step at a time.
- Cruise control now has an overspeed output that can be used to activate
  engine braking or trigger a transmission downshift when coasting down
  steep hills.
- Custom CAN transmit functions can now contain more than 4 data items per
  CAN frame.
- Glow plugs are not activated if engine enable input is off.
- Glow plug heating can be deferred until engine start request is made.

Version 1.7 released October 12th 2021
- Fixed unreliable starting with camless phase swap mode as well as cam sensor
  fault fallback.
- Added ability to increment CAN scan packet data when repeating packets to
  the same ID
- Added exhaust temperature channels to standard OBD2 data set.

Version 1.6 released October 3rd 2021
- Made engine speed smoothing configurable as a function of accelerator pedal
  input.
- Added secondary rail pressure control output for dealing with dual control
  valves.
- Minor performance tweak to communications driver
- Reinstated two stroke engine support
- CAN scan function can now repeat packets before advancing to the next ID.
- Fixed supply voltage compensation in rail pressure control

Version 1.5 released August 19th 2021
- Fixed smoothing functions dependant on pedal position

Version 1.4 released July 23rd 2021
- Implemented new camless sync method that alternates cycles using all injectors
rather than testing for compression with half the injectors.
- Fixed bug preventing internal logger from deleting old files on start up.
- Made internal logger more reliable, solving glitches caused by new type of
  log memory (older type became unavailable)
- Made smoothing filters for fuel quantity configurable as functions of engine
  speed.
- Added custom strategy program code support. 
- Added user defined expressions on ECU side.
- Added injector short circuit detection and fault reporting.

Version 1.3 released May 9th 2021
Added support for second generation hardware (Serial numbers 200 and up)
- More digital inputs
- More general purpose outputs
- Three stage current control for injectors.
- Software controllable main relay for controlled engine shut down.
Also new additions applicable to older hardware:
- More CAN receive channels
- More custom CAN transmit channels
- Ability to flash check engine light to signal fault codes with alternating
  long/short blinks.
- Low pass filters on CAN receive channels
- Ability to turn off glow plug diagnostics on Mercedes due to incompatibility
  with some aftermarket glow relays.
- 2 stage nitrous oxide control
- Transbrake control with bump ability

Version 1.2 released January 28th 2021
Fixed internal data logging that was completely broken in version 1.1 

Version 1.1 released January 19th 2021
- Added support for post injection
- Altered strategy for control of synchronous suction control valves.
- Added remote operable bits for OBD2 or Calibrator control
- Increased quantity of user configurable logic conditions

Version 1.0 released October 19th 2020
- Fixed bug that caused the cylinder contribution to be wrongly attributed in
  some trigger configurations. Also added a way to manually adjust the offset
  in case any configurations still get it wrong.
  Improved cylinder disable test dialog to show cylinder contribution.
- Improved error handling in internal data logger.
- Digital inputs show up in event logs if used for timing/frequency input.
- Added ability to delay engine speed calculation if teeth close to missing
  tooth on crank trigger prove inaccurate.
- Added ability to start an even fire engine with even number of cylinders
  without cam sync by detecting crankshaft acceleration during combustion.
- Added the ability to fall back to camless start up if cranking for a set
  amount of time but no cam sync is reached.
- Added support for Mercedes Benz oil level/temperature/quality combination
  sensor in oil sump.
- Added definition for up to two MAF sensors including cylinder air mass
  computation.
- Cam sync filtered by tooth count distance from crank sync now works
  properly.
- Configurable low pass filters added for CAN receive channels to get better
  use of devices that transmit noisy unfiltered samples to the CAN network.
  This is true of many ABS and instrument clusters transmitting wheel speed
  information.
- Added ability to take torque request (accelerator pedal) by other means than
  analog inputs 0 and 1, adding flexibility for non-automotive applications.

Version 0.11 released July 12th 2020
- Lots of new trigger options added:
  * Sequential cam sync on odd cylinder count engines without cam sensor.
  * Support for crank wheels with lots of missing teeth, even with no useful
    features to sync by relying on cam sensor.
  * Cam sync filtered by tooth count distance from crank sync in either
    direction.
- Turbocharger control with up to three control variables with three control
  loops operating in tandem, making it possible to observe limits on
  turbocharger operation that are unrelated to boost pressure like shaft speed.
- Adaptive cylinder balance control added to compensate for differences
  between cylinders at idle, reducing engine vibration at idle.
- Added a fuel limit map based on rail pressure to prevent excessive injector
  pulse widths while rail pressure is catching up to target.
- It is now possible to have sepearate flow models for each injector to
  compensate for differences between injectors.
- Modified firing order computation in relation to crank trigger, cylcontrib
  variables more likely to match up with their numbered cylinder now.
- Fixed cylinder disable test dialog errors.

Version 0.10 released April 15th 2020
- Fixes bug that made rail pressure control derivative factor not adjustable
  independently of proportional factor.

Version 0.9 released April 14th 2020
- Fixes bug when range limit maps for turbo control are of different
  dimensions than boost target maps.

Version 0.8 released April 13th 2020
Minor update.
- Adds glow plug diagnostics for Mercedes Benz "PWM" glow plug relays.
- Adds range limit maps for restricting VGT turbocharger movement depending on conditions.
- Fixes bug that caused doubled injection pulses when certain alignment conditions with pulse duration and injection angle were met.

Version 0.7 released March 31st 2020
Major update. Lots of new features and lots of bugs fixed. The list below is probably not a complete list of what has changed.
- Fixed bug with translation function for rail pressure control PWM.
- Fixed bug causing corrupt logs with some combinations selected in structured logging mode.
- CAN bus 2 is now operative.
- Calibration pots are now operative.
- Tunable damping factor added to engine speed that can be used for map lookups for smoother engine operation.
- Tunable damping factor added to fuel request for smoother driveability.
- Added dialog to test injector outputs.
- Added ability to control suction control valves on certain high pressure pumps that need their valves operated in sync with the crankshaft angle.
- Added general purpose fuel limiters and injection timing modifiers.
- Added glow plug diagnostics for Mercedes Benz glow plug controllers.
- Changed the fault handling code so now each fault can be assigned an action that is either to ignore it, to illuminate the check engine lamp or illuminate the check engine lamp and reduce engine power and/or maximum RPM.
- Water/methanol injection control
- Nitrous oxide control

Version 0.6 released December 14th 2019
Major update but still no CAN2 and LIN. Lots of bugs fixed.
Note that the default configuration now has all of the configurable outputs
disabled. To set them to reasonable defaults select an output template from
the configuration templates (Tools menu in Calibrator)
Same goes for CAN bus and engine firing order settings.
New features:
- Torque management for transmission and ESP communication.
- Automatic starter control
- Variable speed fan control
- Lots of new CAN bus features to support full integration in Mercedes Benz
  cars.

Version 0.5 released November 24th 2019
First public release of DID1 firmware.
Hardware features that are currently not supported:
- LIN bus control
- 2nd CAN bus control