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CHANGELOG.md

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Changelog

2.2.3-dev

  • Fixed typo in macros
  • NOTE: currently the dimmer firmware is running on the ZC interrupt, not the predicted signal until it is more stable
  • Added Dimmer::delay() function that can read and execute I2C over UART commands while waiting
  • Option to set/face all channels with one command (DIMMER_HAVE_SET_ALL_CHANNELS_AT_ONCE; breaking change: disabled by default)
  • Refactored some old code, more C++ style
  • Added a delay function that processes incoming UART events during calling the Dimmer::delay() function (replacement for ::delay())
  • Changed the prediction timer to uint32_t
  • Increased serial RX buffer to 128 byte to avoid loosing data (UART mode only)
  • Option to set and fade levels in main loop to speed up _dimmer_i2c_on_receive()
  • Fixed reading/writing cubic interpolation for multiple channels
  • 2.2.3 breaks binary compatibility with previous versions due to changes in some structures
  • Fixed rare flickering when turning a channel off by adding double buffering to the channel levels
  • Option to disable the ADC interrupt, to avoid blocking interrupts during the calculation
  • Auto restart if the dimmer was shut down due to invalid zero crossing signals
  • Improved ZC filtering and prediction
  • Added custom_copy_hex_file to platformio.ini. Multiple locations can be specified
  • Creating dimmer_version.h from library.json
  • More options to configure the frequency measurement
  • library.json to include the library directly for headers only without being compiled
  • Added example of 16 channels 16ch_dimmer_p (requires to update structures and the master needs to be compiled with the same headers, see dimmer.h)

2.2.2

  • Min. pulse width for frequency measurement
  • Browser based tool to create cubic interpolation curves
  • Added cubic interpolation to create linear brightness levels
  • Changed default offset/gain for ATMega328PB temperature sensor
  • Info displayed invalid voltage during frequency calibration

2.2.1

  • Stop/freeze fading command
  • Fixed missing fading completed events

2.2.0

  • Removed linear correction
  • Removed ZC_MAX_TIMINGS
  • Level range can be configured
  • Minimum on-time can be adjusted dynamically for devices that need a certain voltage level to start-up
  • Configurable trailing/leading edge mode
  • Frequency auto detection (50/60Hz)
  • Increased ZC delay to 16bit / 500ns resolution
  • Support for asynchronous ZC signals
  • Filter invalid ZC signals and continue to run up to several seconds without being synchronized
  • Python tool to configure/monitor the dimmer over the serial port (for version 2.1.x and 2.2.x only)
  • EEPROM wear leveling improved and fail-safe added
  • Tool to generate inline assembler for toggling MOSFET pins
  • Support for TRIACs (leading edge only) added - tested with MOSFETs, BJTs and TRIACs
  • Improved performance and reduced code size using the ADC interrupt
  • Reboot notification event after the frequency measurement has been completed
  • Patch for Arduino library
  • Structure updates
  • Fix issue in serial protocol of the python config tool

2.1.5

  • Fixed issues with millis overflow
  • Replaced frequency and misfire error with single type of error
  • SerialTwoWire updated
  • Replaced crc16.cpp with a library
  • Changed default max. temperature to 75°C and metrics update interval to 5 seconds
  • Added environments for flashing the boot loader to ATMega328P and ATMega328PB @ 8MHz and BOD disabled
  • Improved reading VCC and internal temperature

2.1.4

  • Added DIMMER_ZC_INTERRUPT to specify rising or falling interrupt triggering
  • Removed DIMMER_COMMAND_RESET since it was not working with several versions of the boot loader

2.1.3

  • Fixed bug in EEPROM wear leveling and invalid CRC after cycling
  • Added output of EEPROM read/write status to serial port

2.1.2

  • Fixed 32bit overflow in timer that caused the zero crossing detection to malfunction
  • Added +REM=BOOT message in setup()

2.1.1

  • Changed max. temperature to 90°C which is the maximum operation temperature allowed for dimmers (195F)
  • Added filter to skip all ZC interrupts above 90Hz (@60Hz mains)
  • Added error counter for high/low frequency and zero crossing misfire
  • Added debugging code to send zero crossing interrupt timings to serial port (ZC_MAX_TIMINGS)
  • Fixed wrong NTC PIN at dimmer info

2.1.0

  • Added version to register memory (DIMMER_REGISTER_VERSION)
  • Added print dimmer info command (DIMMER_COMMAND_PRINT_INFO)
  • Added command force temperature check (DIMMER_COMMAND_FORCE_TEMP_CHECK)
  • Added structure dimmer_metrics_t for DIMMER_METRICS_REPORT
  • Added CRC16 to EEPROM configuration
  • Added event that indicates that the EEPROM has been written (DIMMER_EEPROM_WRITTEN)
  • Added print metrics on serial port (DIMMER_COMMAND_PRINT_METRICS)
  • Added offset for internal temperature sensor and ntc (DIMMER_REGISTER_xxx_TEMP_OFS, int8 * 0.25 °C, ~ +-32°C)
  • Added warning if the AC frequency is below 75% or above 120% (DIMMER_FREQUENCY_WARNING)
  • Added undocumented commands for testing and calibration (0x80-0x91, i2c_slave.cpp)
  • Added MCU detection for adjusting internal temperature sensor
  • DIMMER_COMMAND_READ_NTC, DIMMER_COMMAND_READ_INT_TEMP and DIMMER_COMMAND_READ_AC_FREQUENCY return NaN if not available, DIMMER_COMMAND_READ_VCC 0
  • Fixed outdated debug code
  • Fixed issue with reading ADC values and delay() inside the I2C interrupt callback
  • Fixed empty configuration structure after reset without calling _write_config()
  • Fixed int overflow for temp_check_interval > 32
  • Fixed pin mode for NTC
  • Fixed fading with short time intervals and float not having enough precision for a single step
  • Changed default values for ZC crossing delay and other timings to match my dimmer design
  • Changed DIMMER_TEMPERATURE_REPORT to DIMMER_METRICS_REPORT

2.0.2

  • Configurable timing parameters for the MOSFET
  • Added documentation for timings to dimmer.h
  • Display compile settings and values during start up (HIDE_DIMMER_INFO)
  • Added AC frequency measurement (FREQUENCY_TEST_DURATION)
  • Enabled printf float formatting and removed PrintEx library
  • Added event to indicate when a fading operation has been completed (HAVE_FADE_COMPLETION_EVENT)
  • Fixed an issue with floats and rounding when using fading

2.0.1

  • Changed default I2C address to 0x17/0x18
  • Increased delay when reading internal temperature and VCC
  • Added macros for thermistor temperature calculation
  • Changed macro names to match pattern, additional macros to enable/disable reading VCC, NTC, internal temp. sensor

2.0.0

  • Added I2C slave protocol
  • The serial protocol was replaced by I2C over UART emulation
  • Added example how to control the dimmer via I2C and UART
  • Removed SLIM version
  • Auto select prescaler bits for DIMMER_TIMER2_PRESCALER
  • Changes for Platform IO 4.0

1.0.9

  • Added some extra ticks if timer interrupts are close to avoid skipping one
  • Improved the timing of the zero crossing interrupt using timer2
  • Added min. "on" time

1.0.8

  • Added VCC to dimmer info and temperature report (INTERNAL_VREF_1_1V might need some adjustments to be precise)
  • Added CPU Frequency to dimmer info
  • Support for ATMEGA Mini Pro 3.3V @ 8MHz
  • Set default prescaler to 8 increasing dimming levels to 16666 for 16MHz and 8333 for 8MHz
  • Respond to invalid commands with error
  • Changed part of the fade response from "to=" to "lvl="

1.0.7

  • Support for the internal temperature sensor of the ATMEGA

1.0.6

  • EEPROM wear leveling to increase writes ((EEPROM size - 8 byte) / size of configuration) = 50, which should be ~5 million writes

1.0.5

  • EEPROM write delay to reduce writes
  • Added prefix "~$" for commands

1.0.4

  • Slim version with less than 7.5kb for ATMEGA88. No EEPROM support and different serial protocol

1.0.3

  • Serial command to change configuration
  • Store configuration in EEPROM

1.0.2

  • NTC with configurable over temperature shutdown
  • Store last levels in EEPROM and restore when power is turned on

1.0.1

  • Added support for multiple channels to the dimmer library
  • Added debug code
  • Increased dimming levels to 32767 (DIMMER_MAX_LEVEL)

1.0.0

  • Initial version