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CHANGELOG
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CHANGELOG
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1.6.18 (August 26, 2021):
* Fix a critical bug with the USB CDC where a packet of exactly 64 bytes gets stuck in a buffer.
Up next:
* **Add MicroPython support.** Add Demo sketch with Arduino shell and Python interpreter.
* Add QSPI driver with XIP (DDR support only when the MCU runs at 48MHz) for the D51.
* Add FLASH memory driver libraries
* Add Mass Storage device and/or UF2 support to the bootloader
* Add 32-pin (E) generic variant
* Fix MIDI issue
* Change ADC sampling time (make configurable?), possibly add a continuous sampling mode with non-blocking reads
* Add SAM D51 support to I2S driver (I have finished DMA driver changes)
* Add PDM microphone and MCK support to I2S driver
* Add internal temperature sensor driver (as described in datasheets), currently testing, D51 missing calibration values
* Fix new ringbuffer issue
* Add BUCK_CONVERTER_ENABLED define and/or menu item, to enable on-chip buck converter of D51 and L21.
Must solve possible issue first (auto-reset failure when buck converter enabled).
1.6.18-beta-b1 (June 26, 2018):
* Added BATTERY_CHARGER_INSTALLED, IMU_INSTALLED, and VIN_5V_REGULATOR_INSTALLED defines to variants/Xeno_Mini/variant.c
(and variant.h) to prevent associated pins from being configured as outputs, thus avoiding contention.
* Made various changes to reduce code size, including making ADC and DAC initialization optional if unused, using VARIANT_MCK instead of
SystemCoreClock in init(), and converting some RMW's to writes. Added config.h file for configuration.
* Added config.h file, which contains defines for building that are mainly used to reduce code size
* Removed pinMode(31, INPUT) from init() in wiring.c as it is already setup (and pinMode should not be used here because we always want port pin A31, not Arduino pin 31)
* Moved ADC and DAC initialization from wiring.c to wiring_analog.c, with ability to initialize only on use.
* Added an additional PinDescription table format, which can be used to reduce code size (D11 chips only for now)
* Added support for 20 different timer PWM frequencies selectable through the Tools menu, as well as other various clock system changes
* Fixed bad first read from analogRead() after changing references by using a dummy read.
* Added support for the hardware FPU of the D51
* Added -mfloat-abi=softfp (this will use hardware fpu with soft-float calling conventions) and -mfpu=fpv4-sp-d16 compiler flags for the D51 only.
* Fixed build.mathlib build flag (arm_cortexM4lf_math or -arm_cortexM0l_math), added -DARM_MATH_CM0PLUS or -DARM_MATH_CM4
* Added optional support for single precision floating point numbers (in addition to the existing support for doubles) in both the Print and String classes,
configurable from the Tools menu. This can save a great deal of code space. Thanks to Soren Kuula and Dmitry Xmelkov for their previous work.
* Print::print and Print::println now have separate overloaded methods for float and doubles (previously, floats were promoted to doubles).
Additionally, to support this, Print::printDouble() has been added (Print::printFloat() used to promote to double, but now uses floats).
* Added Stream::parseDouble() to Stream.cpp, and pgm_read_double(), pgm_read_double_near(), and pgm_read_double_far() to avr/pgmspace.h.
* Added avr/ftostrf.c and avr/ftostrf.h to support single precision floats (avr/dtostrf.c is still double precision). It is similar to avr-libc version.
Additionally, to support this, added avr/dtoa_conv.h, avr/dtoa_prf.c. Copyright (c) 2005, Dmitry Xmelkov.
Additionally, added avr/ftoa_engine.h, and avr/ftoa_engine.c. Copyright (c) 2005, Dmitry Xmelkov. Rewritten in C by Soren Kuula (from Ardupilot project).
These are used by String::String and String::concat, which are overloaded, so ftostrf.c or dtostrf.c is selected automatically based on the value argument.
* Added -fsingle-precision-constant and -Wdouble-promotion compiler flags
* Added support for 64-bit integer types to the Print class (long long and unsigned long long)
* Added optional support for printing floating point numbers using the Print class with values greater/less than +/-4,294,967,295. It now supports +/-18,446,744,073,709,551,615.
* Documentation updates, including new PinDescription table format
* Beta builds will now be included in the main release json file
1.6.18-beta-b0 (February 22, 2018):
* Added SAM D51 (m4f) support to core
* Added MattairTech Xeno Mini board support
* Changed name to "MattairTech SAM D|L|C core for Arduino"
* Added _ulTickCountHighWord to delay() to avoid 49.7-day wraparound, can disable in config.h from 1.6.18-beta-b1
* Updated timeout in [Bossa](https://github.com/mattairtech/BOSSA) tool for D51 1MB FLASH (5 second erase)
* Correction of include path for CMSIS-Atmel - Thanks @joseangeljimenez
* Documentation updates
* Merged in changes from upstream SAMD CORE 1.6.18 (not released yet)
* Don't reallocate USB buffers if already allocated - fixes memory leak
* Wire: Added support for general call (broadcast)
* SPI: Added SPI.notUsingInterrupt(...) API
* Wire: TX and RX buffers are now 256 bytes (previously was 64 bytes)
* Fixed lock ups when outputting to UART during ISR
* Wire: correct I2C frequency calculations, and allow variant to overide default pull up resistor rise time
* Revert new ringbuffer code for now
* Merged in changes from upstream SAMD CORE 1.6.17
* UART's now support optional RTS and CTS pins defined in the variant.
1.6.17 (release version, February 22, 2018, same as 1.6.17-beta-b0):
1.6.17-beta-b0:
* Added SAM D51 (m4f) support to bootloader
* Added Generic D11D14AS (20-pin SOIC) variant
* Made PIN_USB_HOST_ENABLE optional. Readme updates for MT-D11 and Generic D11C14A
* Fixed USB pad calibration values for L21 in bootloader and USB host mode
* Improve accuracy of HS crystal (fixed off-by-one calculation)
* fixed wrong location for call to mapResolution(), doc updates
* Documentation updates
* Merged in changes from upstream SAMD CORE 1.6.17 (not released yet)
* Improved ISR response time. Thanks @joverbee
* No fixed value for USB power current.
1.6.16 (release version, same as 1.6.16-beta-b0):
1.6.16-beta-b0:
* Added MattairTech Xeno support (64-pin D21, L21, and C21)
* Changed version numbering to match Arduino SAMD core to indicate which upstream changes have been merged in.
* Release version 1.6.7 then skips to 1.6.16. Beta version 1.6.8-beta-b2 skips to 1.6.16-beta-b0.
* Merged in changes from upstream SAMD CORE 1.6.16 2017.08.23:
* PWMs now can perform real 16-bit resolution if analogWriteResolution(16) is set. Thanks @Adminius
* USB CDC: fixed issue of available() getting stuck when receiving ZLP's
* Serial (UART) tx is now buffered.
* Updated Stream and Print class
* Native USB now supports USB Serial Number
* Fixed pgm_read_ptr compatibility macro. Thanks @nkrkv
* Documentation updates
**Version numbering change**
1.6.8-beta-b2:
* Added SD Card firmware loading support to the bootloader (4KB and 8KB)
* Removed SDU library, as the bootloader now supports SD cards directly (and the SDU library is GPL)
* Removed automatic page writes from bootloader (may have caused bricked board during development)
* Fixed bootloader compilation on Windows
* Added more Serial, SPI, and WIRE instances to MT-D21E (rev A and B)
* Added support for up to 6 SERCOM on the L21E (32-pin)
* Merged in changes from upstream SAMD CORE 1.6.16 (not released yet):
* USB CDC: fixed issue of available() getting stuck when receiving ZLP's
* Merged in changes from upstream SAMD CORE 1.6.15 2017.04.27 (not relevant)
* Merged in changes from upstream SAMD CORE 1.6.14 2017.04.04:
* Added lowpower function on USB subsystem
* Documentation updates
1.6.8-beta-b1:
* Fixed auto-reset not working on some versions of Windows
* Documentation updates
1.6.8-beta-b0:
* Added L21 and C21 support. Improved D11D and D11C support.
* Use Tools->Microcontroller menu to select mcu.
* Both the core and bootloader have added support for:
* external high-speed crystal (400KHz - 32MHz) using PLL
* external 32.768KHz crystal using PLL
* internal oscillator with USB calibration using DFLL
* internal oscillator using DFLL in open-loop mode (or 48MHz RC oscillator with C21)
* PLL_FRACTIONAL_ENABLED and PLL_FAST_STARTUP options
* The clock source is selectable in the Tools->Clock Source menu
* New Tools->Serial Config menu for selecting different combinations of serial peripherals
* New Tools->Bootloader Size menu allows selection of bootloader size
* New Tools->USB Config menu simplifies USB configuration compared to previous core
* Updated variant.cpp table format for future CCL and GCLK use. See VARIANT_COMPLIANCE_CHANGELOG.
* Updated bossac upload tool (fixed support for SAML and SAMC)
* New CMSIS-Atmel package (this is different than from Arduino)
* Merged in changes from upstream SAMD CORE 1.6.14: (not relevant)
* Merged in changes from upstream SAMD CORE 1.6.13 2017.03.31:
* Added SDU (SD card Updater) library. Not set up yet for MattairTech boards.
* Fixed 8MHz clock being generated incorrectly. Thanks @keestux
* Merged in changes from upstream SAMD CORE 1.6.12 2017.02.07:
* Fixed type conflict of utoa function. Thanks @kbumsik
* Fixed pinMode(pin, OUTPUT) not working after analogRead(pin)
* Merged in changes from upstream SAMD CORE 1.6.11 2016.12.23 (not relevant)
* Merged in changes from upstream SAMD CORE 1.6.10 2016.12.23:
* Added .org boards
* linker: .data section is now aligned to 16 bytes address
* Added method to automatically retrieve sketch start via linker variable
(see https://github.com/arduino/ArduinoCore-samd/pull/185)
* Fixed USBDevice.epBank1EnableTransferComplete method
* Adapted bootloader source code to CMSIS 4.5
* Merged in changes from upstream SAMD CORE 1.6.9 2016.12.12:
* SPI: Optimized SPI.transfer(...)
* Added linker flags for the ARM Math library
* Added new I2S library
* Bootloader: Check sketch vectors before waiting for double tap
* Upgraded CMSIS version to 4.5.0, and use new CMSIS-Atmel package
* Merged in changes from upstream SAMD CORE 1.6.8 2016.10.12:
* Fixed regression on analogWrite. Thanks @bose-mdellisanti!
* Fixed regression on SerialUSB.available()
* C++ global constructors (if any) are now run after hardware initalization.
* Merged in changes from upstream SAMD CORE 1.6.7 2016.09.28:
* Fixed Serial.flush() blocking before any writes. Thanks @hangmoh
* Added snprintf_P to avr/pgmspace.h stub. Thanks @jantje
* Another small fix to String iterators. Thanks @Ivan-Perez @Chris--A
* Fixes SerialUSB.write(...) returning 0 instead of byte written
* Added Uart::availableForWrite()
* Added defines for RAMSTART, RAMSIZE, RAMEND
* Fixed writing LOW to a digital input pin blocking subsequent digitalRead attempts
* Fixed digitalWrite() unnecessarily activating the pull-up resistor
* Wire: Slave writes now use TX buffer
* Added getTimeout() method to Stream.
* Fixed glitch in PWM generation that may happen when calling analogWrite()
* PWM frequency is now 732.4Hz (before it was 187500.0Hz)
* Improved reliability of SerialUSB under heavy load (this should solve
all issues with MKR1000/WiFi101 firmware updater on MacOSX)
* Improved SerialUSB.read() performance
* Added String::toDouble()
* Bootloader: LED now pulses and USB TX/RX blink on transfer (like Leonardo)
* Bootloader: enabled USB string descriptors
1.6.7:
1.6.7-beta-b0:
* OS X support added (bossac for OS X can now upload to all supported chips) (Thanks @joseangeljimenez for testing)
* New bossac upload tool (added support for SAML and SAMC)
* New bootloader from upstream SAMD CORE (see bootloaders/zero/README.md)
* New beta release method (see README.md)
* Changing some names from 'SAMD' to 'SAM M0+'. The core will add L21 and C21 support soon.
* Merged in changes from upstream SAMD CORE 1.6.3 2016.02.15:
* Fixed Wire master repeated start behaviour
* Added SerialUSB methods: readBreak(), baud(), stopbits(), paritytype(), numbits(), dtr(), rts()
* Added SPI.transfer16(..) method
* Bugfix: added missing Serial.begin(baud, config) method. Thanks @tuxedo0801
* Fixed Serial baudrate calculations for 1200bps. Thanks @TomKeddie
* Fixed Serial.flush() that now waits until the last bit has been sent. Thanks @TomKeddie
* Fixed Serial configuration for data-bit. Thanks @TomKeddie
* Bootloader: 32Khz external oscillator is now used, improves USB clock. Thanks @aethaniel
* Bootloader: Clean up of makefiles and file organization. Thanks @aethaniel
* Small fix to USBHost example "USB_desc.ino". Thanks @bbx10
* USBHost: USB-Keyboard right shift key was ignored. Thanks @bbx10
* Wire library now support multiple instances in variant. Thanks @spiderkeys
* Ported some SerialUSB API (readBreak(), baud(), stopbits(), paritytype(), numbits(), dtr(), rts())
* Merged in changes from upstream SAMD CORE 1.6.4 2016.02.19:
* Fixed Wire address setup when running as slave.
* Fixed String constructor when using floating point numbers.
* USBHost: fixed blocking USBHost.Task(). Thanks @bbx10
* USBHost: fixed some ASCII Control codes in keyboard controller. Thanks @bbx10
* USBHost: ported some minor fix from upstream UHS2. Thanks @bbx10
* USBHost: fixed wrong library initialization. Thanks @bbx10 @ladyada
* better interrupt handling in Serial::accept()
* Merged in changes from upstream SAMD CORE 1.6.5 2016.04.02:
* Set NVMCTRL.MANW bit to 1 (default is 0). This prevents accidental writes on program memory.
* Bootloader: Fixed wrong UART speed (regression)
* Fixed incorrect return value from Wire.available() when the receive buffer is not fully read.
* Added DAC0 definition in Arduino/Genuino Zero variant file.
* Merged in changes from upstream SAMD 1.6.6 2016.05.19:
* Fixed digitalPinToInterrupt() macro, now it works as documented.
* Added analogInputToDigitalPin macro
* On-board RX-TX LEDs now blinks when there is activity on the native USB port
* Fixed platform.txt, the core now compiles again with Arduino IDE <=1.6.5. Thanks @per1234
* Fixed Wire.write(0x00) "ambiguos method" error
* String class now supports iterators. Thanks @Chris--A
1.6.6-mt3:
* Fixes compilation with CDC_UART and CDC_ONLY settings
1.6.6-mt2:
* Changes the default Communication setting to CDC_UART (from CDC_HID_UART)
1.6.6-mt1:
* New documentation section 'Special Notes'. Please read!
* Updated ASCII pinouts to be more readable and less ambiguous.
* Updated the Signed driver for Windows (extras directory).
* adds CDC/MIDI/HID, CDC/MSD/HID, and CDC/MSD/MIDI/HID composite USB devices.
* Of the above, currently only CDC/MIDI/HID is usable (see MIDIUSB library).
* Merged in changes from upstream:
* Added SPI.transfer16(..) method
* Bugfix: added missing Serial.begin(baud, config) method. Thanks @tuxedo0801
* the pin mode is changed to INPUT mode, arduino/ArduinoCore-samd#28
* HardwareSerial BUG Rx pin floating input, arduino/ArduinoCore-samd#48
* Send a ZLP if data size is multiple of EPX_SIZE for USB sends, arduino/ArduinoCore-samd#63
* Print not aborting on write failure, changelog update
* Tone fix for arduino/ArduinoCore-samd#59 and optimizations
* Fix warnings about deprecated recipe.ar.pattern
* Merged in changes from upstream SAMD CORE 1.6.2 2015.11.03:
* Fixed bug in delay calculations
* Fixed deadlock conditions in Wire. Thanks Erin Tomson
* Print not aborting on write() failure. Thanks @stickbreaker
* SPI can now be configured in variants. Thanks @aethaniel
* Implemented Wire.end
* Implemented Wire.setClock. Thanks @PaoloP74
* Wire: allow scanning bus via beginTransmission-endTransmission
* USB Device: big refactoring and bug fix
* USB Device: added PluggableUSB interface
1.6.5-mt2:
* Added support for the MT-D11 (ATSAMD11D14AM).
* Reduced code size (see 'Code Size and RAM Usage' below).
* Any combination of CDC, HID, or UART can be used (or no combination), by using the Tools->Communication menu.
* Note that switching between CDC and CDC+HID will require re-selecting the COM port.
* More detailed memory usage at end of compilation (see below).
* Merged in upstream updates. Fixed Wire interrupt.
* Tested all ADC, DAC, external interrupts, PWM outputs, serial, SPI, and Wire instances/pins.
1.6.5-mt1:
* Initial release