=== FW 3.57 ===
* Added CAN status message 5 with input voltage and tachometer data.
* Fix github issue #94.
* Use default F_SW for HW after autodetect FOC.

=== FW 3.56 ===
* Fixed current offset fault bug in non-FOC mode.
* Multiple IMU support.
* Added support for the ICM-20948 IMU.
* Decreased ERPM cut in open loop flux linkage measurement.

=== FW 3.55 ===
* Initial sin/cos encoder support.
* New ADC control mode.
* Virtual motor support.
* Disable chuk cruise control on dropouts.
* Fix multiple VESCs over CAN duty cycle mode.
* Added boot and runtime flash memory CRC integrity check.
* Updated chuk RPM filter and moved it to the beginning of the output thread.
* Decreased chuk output thread rate from 1 kHz to 200 Hz.
* Added mpu_read_reg terminal command.
* Fixed DRV8301 fault readout bug.
* Added unbalanced current detection.
* Added high current offset detection.

=== FW 3.54 ===
* Added mcpwm_foc_set_openloop_duty and mcpwm_foc_set_openloop_duty_phase.
* Added blackmagic probe SWD output to program other MCUs.
 - Can be used to flash bricked VESCs from a working one.
 - Can be used to make a custom NRF5x module.

=== FW 3.53 ===
* Limit foc_current_filter_const range to prevent damage due to bad configuration.
* Set default NRF speed to 1 Mbit/s.
* Use lower switching frequency when detecting resistance to reduce deat-time distortion.
* Don't enable temperature compensation in auto detection by default.

=== FW 3.52 ===
* Added support for second revision of HW75/300 with separate UART for NRF51.
* Added COMM_TERMINAL_CMD_SYNC, which does not drop commands when busy.
* Added option to disable permanent UART.
* Moved TIM5 to own file, and use it from other places.
* Removed need for TIM2 in mcpwm.
* Added utilization percentage to threads terminal command.
* Added IMU interface.
* Added support for the MPU9150 and MPU9250.
* Added COMM_GET_IMU_DATA.

=== FW 3.51 ===
* Fixed AS5047 error rate bug at position 0.
* Increased threshold for AS5047 fault to 5 %.
* Set correct V_REG value for HW 75/300.
* Better command processing.
* Proper scaling when setting relative currents and acceleration and braking currents are different.

=== FW 3.50 ===
* AS5047 parity check and fault code on error rates > 1 %.
* Signature on mc and app configuration.
* FOC loop frequency truncation on all hardwares.

=== FW 3.49 ===
* New watchdog implementation.
* HW updates.
* Fixed DC motor current sampling issue.
* Deadtime in nanoseconds instead of register value.
* Use fastest ramping time when throttle is applied.

=== FW 3.48 ===
* Added pairing flag to appconf.
* Decreased CAN TX timeout.

=== FW 3.47 ===
* Current percentage limits.
* Mcconf_temp based on current scale instead of absolute current.
* Removed battery current from mcconf_temp.
* Added current scale parameter.
* Different braking behavior: prefer cogging over locking the brakes.

=== FW 3.46 ===
* DC motor RPM measurement and RPM control when using encoder.
* Support for configurable current low pass filter.
* Much better recovery when failing to decode packets.
* Run all detect functions in separate thread.
* Fixed bug introduced when adding support for dual UARTs.
* Added support for reverse state on NRF remote.
* Support to disable app output for a specified time.

=== FW 3.45 ===
* Default CAN ID from UUID, and hook to define it in hwconf.
* CAN ping support.
* Simultaneous firmware update over CAN-bus.
* Fully automated motor detection, based on maximum motor power losses.
* Sensor autodetection and configuration support.
* Softer encoder detection.
* Better NRF_EXT support.
* New more reliable flux linkage measurement.
* Simpler to add hardware versions to build system. 
* More DAS hardware support.
* DRV8323s support.
* Initial UAVCAN support.
* Moved from uart to serial driver to avoid DMA conflicts.
* Support for permanent UART.

=== FW 3.44 ===
* NRF_EXT commands support.
 - Use NRF51822 with ESB remotes.
* Different radio channel for NRF pairing.

=== FW 3.43 ===
* Added battery ah to setup info.
* Changed tacho values in COMM_GET_VALUES_SETUP to meters.
* Added battery wh COMM_GET_VALUES_SETUP.
* Better remaining battery capacity calculation.

=== FW 3.42 ===
* Added setup info parameters:
 - Motor Poles
 - Gear Ratio
 - Wheel Diameter
 - Battery Type
 - Battery Cells
* Added more CAN status messages.
* Updated speed PID to start properly when braking is disabled.
* Added COMM_GET_VALUES_SETUP.
* Added COMM_SET_MCCONF_TEMP.
* Added COMM_SET_MCCONF_TEMP_SETUP.
* Added COMM_GET_VALUES_SELECTIVE.
* Added COMM_GET_VALUES_SETUP_SELECTIVE.

=== FW 3.41 ===
* First general purpose DC output implementation.

=== FW 3.40 ===
* Added motor controller ID to COMM_GET_VALUES.

=== FW 3.39 ===
* Updated HW75_300.
* Added AUX output support.

=== FW 3.38 ===
* Fixed temperature limit bug when the acceleration and brake current limits are different in magnitude.

=== FW 3.37 ===
* Temperature compensation on KI in addition to the observer resistance.
* Configurable FOC current filter (useful for slow abs max current setting).

=== FW 3.36 ===
* Added handbrake current commands to the simple CAN interface.
* Added D-term filter to position and speed controllers.

=== FW 3.35 ===
* Added option to disable nRF transmission (option in Transmit Power parameter).
* Fixed servo output driver for all hardwares and removed software servo driver.

=== FW 3.34 ===
* Added motor PID position to COMM_GET_VALUES.
* Inverted direction angle normalization in mc_interface.
* Use relative current mode in APP_ADC to support multiple VESCs with different current limits.

=== FW 3.33 ===
* Fixed CAN-bus baud rate update.

=== FW 3.32 ===
* Added CAN-bus baud rate setting.

=== FW 3.31 ===
* Option to decrease temperature limits during acceleration to still have braking torque left.
* Added PID speed control mode to ADC app.

=== FW 3.30 ===
* Activated iterative observer for better operation at high ERPM.
* Check for NAN and truncate some FOC variables.
* Speed controller windup protection improvement.

=== FW 3.29 ===
* Disabled throttle limit scaling for now.
* Increased packet timeout.

=== FW 3.28 ===
* DC_CAL timeout.
* Added board configuration file to avoid braking at boot.
* Shorter default fault stop time.
* Lower default PPM ramping time.
* Configurable beta value for motor thermistor.
* Individual throttle curves for acceleration and braking.

=== FW 3.27 ===
* Watt hour reset bug fix
* Changed the way custom applications are implemented.
* FOC: high current sampling mode.

=== FW 3.26 ===
* Current limit bug fix. It is now possible to apply break past the RPM limits.
* Openloop RPM calculation bug fix.

=== FW 3.25 ===
* APP multi-VESC PID control: send current instead of duty cycle for better load sharing.
* Added relative current commands to mc_interface and comm_can.
* APP ADC: added mode ADC_CTRL_TYPE_CURRENT_REV_BUTTON_BRAKE_ADC.
* APP ADC: changed behavior when throttle and brake ADC channels are used simultaneously for smoother combination.
* APP ADC: ramping support.
* Flux linkage measurement: Added extra try with high integrator value.

=== FW 3.24 ===
* Changed back inductance calculation since that seems to work much better in practise. (TODO: Have a closer look at why)

=== FW 3.23 ===
* Improved inductance measurement (bug fix).
* Multiple tries with different settings on flux linkage measurement.
* Observer improvements for high speed operation and better performance across the whole speed range.
* Compile time option to disable override limits.

=== FW 3.22 ===
* Added hardware-specific limits to configuration parameters.
* Permanent NRF bug fix.

=== FW 3.21 ===
* Fixed regression in PID speed controller.

=== FW 3.20 ===
* PID speed control: Set prev_error to error when the PID is off to make the start smoother.
* Improved spinup algorithm for flux linkage and bldc parameter measurement.
* APP ADC: Configurable center voltage for channel 1.
* APP_UARTCOMM: Keep the processing thread running when stopping the app in case the configuration is made from the UART port itself.
* Commands: Return results of long running commands to the port they came from even if commands come in between and change the last port.

=== FW 3.19 ===
* Added terminal plugin hook implementation. Inspired by https://github.com/vedderb/bldc/pull/28
* Moved sampling buffers to CCM to free some RAM.
* Added hardware info terminal command.
* NRF init SPI check fix.
* Sampled data is now transmitted in floating point with scaling done at the VESC. This avoids hard-coded scaling in VESC Tool.

=== FW 3.18 ===
* NRF init SPI check.
* Permanent NRF: reconfigure NRF pins to SPI pins on init failure in case the permanent NRF is not mounted and behave as if there is no permanent NRF.

=== FW 3.17 ===
* Temperature filtering.
* FOC: temperature resistance compensation.

=== FW 3.16 ===
* FOC: stator saturation compensation parameter.
* FOC: Another update for the fix for throttle limits to prevent loosing range at high speed when the battery current limit is lower than the motor current limit.
* DRV8301: over current protection settings added to configuration.
* DRV8301: Reset command andded to terminal.
* DRV8301: Log fault code read over SPI.
* DRV: Check for faults in ADC interrupt to catch the state as fast as possible.
* Send phase samples as well with the sampling function.
* New sampling modes for debugging.
* BLDC and DC: Configurable switching frequency
* FOC detect: increase minimum switching frequency for motor spinup to make it possible to detect high kv motors at high voltage.
* FOC: observer gain scaling parameter for low modulation.

=== FW 3.15 ===
* FOC: added the option for FOC sampling in both V0 and V7 to mcconf, so that it can be changed without recompiling the firmware.
* FOC: tweaked repetition counter and preload to get cleaner waveforms with low latency.
* FOC: Input voltage filterting and vd/vq filtering while undriven for more stable performance.

=== FW 3.14 ===
* Different throttle curve modes
* Improved FOC sensorless startup.

=== FW 3.13 ===
* Throttle curve for PPM, ADC and Nunchuk.
* Updated fix for throttle limits to prevent loosing range at high speed when the battery current limit is lower than the motor current limit.
* APP PPM ramping.
* APP ADC and PPM current range bug fix for some control modes.

=== FW 3.12 ===
* APP PPM throttle center setting.

=== FW 3.11 ===
* BLDC detect: disable direction inversion before detecting parameters.
* FOC speed control: remove supply voltage scaling since that does not make any sense in current control mode.
* BLDC speed control: added current-based speed controller option.
* BLDC: heavier RPM filtering.
* Speed control: option to disable braking in speed control mode.
* Added wattage limits. Useful for following laws for electric vehicles in some regions.
* Use override current limits to scale throttle inputs in apps. Will prevent the throttle from loosing rage at speed if e.g. the battery current limits are lower than the motor current limits.

=== FW 3.10 ===
* BLDC: removed cycles_running variable.
* BLDC: update ADC sampling in correct order to avoid corrupt samples when the switching frequency changes a lot at once.
* Terminal: print fault duty cycle state with one extra decimal.

=== FW 3.9 ===
* Configuration option for inverting the motor direction.
* STM32 96-bit unique ID readout.

=== FW 3.8 ===
* Communication protocol update for floating point variables. This breaks almost all compatibility with old firmwares.

=== FW 3.7 ===
* Delay after app and motor conf write.
 - Fixes NRF bug.
 - Fixes glitches if throttle is given while updating the configurations.
* Lock mc_interface while storing configuration.
* Nunchuk app local timeout.
 - Prevents the output thread from blocking other outputs after being used before.
* Lock MC interface while storing configurations to flash.

=== FW 3.6 ===
* spi_sw for NRF stop bug fix.

=== FW 3.5 ===
* App NRF pairing.
* App nunchuk chuk error restore bug fix.

=== FW 3.4 ===
* HW version built into firmware.
 - Allows VESC Tool to only list firmwares compatible with the hardware.

=== FW 3.2 ===
* hw_60 support.
* hw_das support.
* DRV8301 support.
 - SPI implementation.
 - Some terminal commands.
* DRV8313 support.
* 3 shunt support.
* Phase shunt support.
* Global RPM limit for both BLDC and FOC.
* Hall sensor software filtering.
* SPI software filtering.
* The software filters remove the need for hardware filtering on the sensor port, making it work for all different sensors without modification.
* Handbrake function for FOC (open loop braking).
* FOC updates and fixes.
 - Current control signs.
 - Control loop integrator fixes.
 - Phase delay compensation and minimization.
 - More consistent flux linkage detection.
 - Resistance and inductance measurement bug fix that could cause a reboot.
 - Timer sampling improvement and cleanup.
 - Support for sampling in V0 and V7 when using phase shunts.
* Fix reboot on over temperature fault code.
* Motor temperature measurement and soft backoff.
* Terminal command for rotating magnet field generation (ACIM experimentation).
* Prevent motor start command during initialization.
* Hardware specific default configuration support.
* Stop functionality for apps so that reboots are not required anymore when changing app.
* EEPROM emulation bug fix: https://github.com/vedderb/bldc/issues/27