Arduino Core for STM32 1.1.1

This release includes:

• Added support of:

  • Nucleo F446RE
  • Nucleo-L031K6 (thanks @silviooliva )

• Added ability to bind std:function on interrupts

• Added _Error_Handler(const char *, int)

• Added FreeRTOS support

• Added new HardwareSerial constructor using pin number

• Added setXXX methods to change used pins of Wire or SPI instances:
  Example to change pins used by Wire instance (by default use defined SDA/SCL ):

  Wire.setSDA(A4);
  Wire.setSCL(PC2);
  Wire.begin();
  

  Example to change pins used by SPI instance (by default use defined MISO/MOSI/SCK):

  SPI.setMOSI(22);
  SPI.setMISO(PA3);
  SPI.begin();
  

• Added recipe.hooks feature to override gcc options thanks a file named "build_opt.h" in the sketch directory.

• Allow to redefine core Exception handler

• Enhance DEBUG_UART feature (used by printf)

• Improve micros() accuracy using SysTick COUNTFLAG

• Improve SPI library code clarity

• Provide access to Low Layer (LL) drivers

• Fixed build issue when USART1 or USART2 is not defined

• Fixed L4 ADC read issue

• Fixed LED_BUILTIN for DISCO_L072CZ_LRWAN1

• Several clean and other fixes ...

Several components libraries are available on stm32duino organization.
They are also available through the Arduino library manager. Search for STM32duino ;)

known issues

• Build failed on Windows if path contains space.
  See #204

Note: Old release was 2018.1.18