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CHANGELOG.md

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IMPORTANT - 19/10/23 and newer FW

This firmware contains initial EGS52 calibration data. You will need to select the correct settings for your car in the configuration app under TCU Program settings -> CAL You can see here for an explination on calibration settings

08/12/24

  • Added in shift torque data from original EGS
  • Split shifting algorithm into 2 modes (Release and Crossover)
  • Added support for the TCC Zener mod addon PCB (For 1.3 PCB)
  • Rewrote current driver algorithm for MPC/SPC solenoids
  • Added support for the Jeep 5 wire shifter (Profile switching is disabled in this mode)
    • See basic configuration for Jeep toggle setting
  • Rewrote sensor API to include smoothing all sensor inputs to the TCU
  • Rewrote torque API of EGS so that Each CAN layer is better handled how it sends/receives torque figures

13/06/24

  • Improve the stability of the TCU when in emergency mode (No configuration)

05/06/24

Bugs

  • Adaptation is disabled at this time due to the massive rework, it will be re-enabled in a future release.

Added

  • Update ESP-IDF to 5.1.1
  • Fix for keyless GO systems starting
  • Add support for EGS52 calibration data
    • Uses OEM EGS hydraulic configuration data
    • Uses OEM EGS clutch calibration data
      • Friction coefficient table
      • Spring pressure table
    • Uses OEM EGS torque converter calibration data
      • Torque multiplication map
      • Pump torque map
  • Add reverse-engineered EGS52 pressure control algorithm!
    • Computes working and solenoid inlet pressure
    • Corrects output MPC and SPC pressure accordingly
    • Computes clutch friction coeffients for optimal MPC working pressure (This means MPC working map no longer exists)
  • Add in prefill for off clutch when changing gears (NO MORE 3-4 FLARE!)
  • Clean process on first boot after update
  • Add option for TCU_ADV_SETTINGS to disable torque requests for each gear change
  • Sensor API rework
    • Poll all sensors on a 20ms timer tick
    • Average out VBATT and TFT signals in order to get a more steady reading
    • Speed sensors are averaged over 8 reading polls (160ms) for a much cleaner reading
  • Brand new Solenoid API
    • On/Off solenoid - On for specific period of time, then activate holding phase
    • Inrush solenoid - On, Hold, Off for specific period (Torque converter solenoid)
    • CC Solenoid - Constant current driver solenoid (Corrected every 2ms)
  • New torque converter (v3) algorithm
    • Adaptation maps are now present for slip and locking
    • Take into account energy through the turbine (Joules)
    • Only adapt when slip and user pedal input are stable
  • New shifter input logic
    • Split the 3 style shifters into their own classes (EWM, TRRS, SLR)
    • SLR - Implement the C/M/S knob for profile selection
    • TRRS - Better handling of range restriction input
  • Make output shaft sensor appear in config app if present
  • DIAG FN_SALVE_MODE emulation (Originally on EGS52) - Allows for controlling IO of the TCU on a test bench via CAN
  • DIAG FN_CANLOGGER_MODE - Allows for sniffing CANBUS on a vehicle (TCU does not send frames in this mode)
  • EGS51 CAN Layer - Changes
    1. Read VB (Fuel flow) signal (Recorded in config app for parity with EGS52/53)
    2. Read KUEB_S_A and KUEB_O_A (Engine torque converter state request) bits, and pass them to torque converter control code
    3. Send K_O_B, K_G_B and K_S_B signals (Torque converter clutch state)
    4. Send NEUTRAL bit when in P/N.
    5. Send GARAGE_SHIFT bit when shifting from P->R or N->D (Gearbox protection under garage shifting)
  • EGS52 CAN Layer - Changes
    1. Set the HSM (Manual mode) bit when using a profile that shifts manually (Used by ESP and Engine ECU)
    2. Send FMRAD (Input -> Output torque multiplier) signal (For Cruise control and ESP)
    3. Send M_VERL - Torque converter loss
    4. Send K_O_B, K_G_B and K_S_B signals (Torque converter clutch state)
    5. Read KUEB_S_A and KUEB_O_A (Engine torque converter state request) bits, and pass them to torque converter control code
  • Torque requests - Add BackToDriverDemand torque request bit (EGS52/53). This allows the engine to know that torque will be increasing and it can roll back the ignition retarding (Results in a much smoother up ramp)
  • Rework IO Expander and program selector API (Credit: @chrissivo)
  • Add support for the SLR McLaren shifter!
  • Add in CUSTOM_CAN CAN layer. This is to support 3rd party engine ECUs See here for more information
  • Shift logic rewrite (This is why adaptation is disabled)
    • Overlap is now split into 2 phases (Release phase, Apply and hold phase)
    • Filling of the clutches is now performed in 3 stages (High, Ramp, Low)
    • Add in engine Inertia compensation when shifting to pull the engine to the correct RPM

21/08/23

  • EGS51 - Repair wonky torque requests
  • Shift reporter - Remove warning about invalid report on flash - Since shift reporter is not being used - we can ignore it.

08/08/23

Added

  • EGS53 - Add support for shift paddles
  • EEPROM Module settings interface
    • Allows for hot-modifying variables in the TCUs code base!
    • Wiki integration in the configuration app
  • Clutch speed and velocity algorithm - based on the calculations done for the gearbox model on the wiki here
    • Calculate the speed of the engaging and releasing clutch during the gear changes
    • Allow the TCU to dynamically set the SPC ramp based on clutch progress to target speed
    • Add RLIs so you can monitor this in the config app
  • New pressure manager - Allows for programming characteristics of the valve body into the TCU so the TCU knows the max and min pressures depending on which valves are open or closed
  • TRRS Range-restrict mode!
  • HFM CAN (WIP)
  • Remove the MPC filler adder map
  • Make MPC prefill pressure += SPC prefill pressure for better prefill quality
  • TCC opens up during shifting, like stock EGS to dampen the gear change for a smoother change - This will be configurable in a later update.
  • Finally, smoother N-D gear engagement, however Shifting into N-R is STILL rough
  • EGS53 - Fixed display showing 1st when in 5th gear
  • Modified Input speed calculation algorithm to not use a fixed multiplier when in 1st or 5th
  • Add settings to configure push button on shifter / TRRS

Modified

  • Disable TCC in 1st gear by default
  • Update to PIO ESP Framework 6.3.2
  • Improve gear shifting smoothness
  • EGS53 - Correctly calculate driver demand torque
  • EGS52 - Support TRRS shifter (For Jeep)
  • Better functionality of the W/S switch (On TRRS and EWM)

10/04/23

Added

  • TCC learning can now reduce pressure if it detects too much biting at low load
  • Input torque calculation model (Reports torque loss to ESP/ART ECU over CAN)
  • Added Gearbox speed protection when garage shifting (Engine will slow down to < 1000 RPM when garage shifting
  • ADDED BACK WORKING TORQUE REQUESTS!

Merged classic CAN branch

* Split shifter code away from CAN layers (Each shifter can now be independently selected regardless of CAN layer)
* Add draft support for fuel and air table to calculate input torque without any torque readings on CAN (For W124 HFM)
* Add basic petrol engine model (W124 HFM)

Changed

  • BREAKING - Update IDF version from 4.4 to 5.0!
  • Smooth TCC bite and apply algorithm for smoother applying
  • Fixed bump after shifting caused by TCC re-applying
  • Improved PCNT based RPM reading
  • Modify the default downshift 2-1 map for C/W mode to disable 2-1 downshift at idle
  • Update entire CAN Layer implementation for all EGS. Now uses bitfields instead of getter/setter functions for interacting with CAN Data
  • EGS52 - Don't send shifter position when in middle positions

Fixed

  • Fixed downshift maps not being used correctly by the TCU

19/02/23

Added

  • SHIFT - Realtime SPC and MPC modulation during shifts based on input shaft torque (SUPER SMOOTH SHIFTS)
  • SHIFT - Cooldown after same solenoid activation to avoid failed shifts
  • TCC - locking learning adaptation (Manually adjustable in config app too)
  • SHIFT - MPC cushion map for increasing MPC pressure in fill phase (Fix for 3-4 flare)
  • SENSORS - Added Output shaft PCNT code for Output shaft RPM sensor via GPIO
  • SENSORS - Input shaft sensor debouncing for more accurate input RPM readings
  • EGS52 (Chrysler) - Add support for W/S button on EWM shifters
  • GEARBOX - Added AC compressor torque loss when calcualting input shaft torque

Changed

  • DIAG - Updated FW upload/download API - More inline with KWP2000 (New 'updater' page in config app required)
  • EGS5x - Optimized CAN message Rx
  • EGS52 - Correct FMRAD wheel torque parity (Prevents P20D6 'EGS Momentenanforderung Parityfehler' on ME SFI 2.8 ECU)
  • EGS52 - Removed torque requests - Too aggressive on CDI ECUs
  • SHIFT - Increase Shift solenoid current inrush time to 1 second for sticky old solenoids
  • EGS51 - Fix Start Enable pin on with board V1.3
  • EGS51 - Update torque getter functions

Known bugs

  • 2-1 shift map values don't work at low input RPM

Initial release - 03/01/23