avrtos v1.2.0

Key Features:

• I2C: Introduced a comprehensive I2C driver, and a minimal TCN75 device driver.
• SPI Driver Refactor: Enhanced the SPI driver by introducing the spi_regs intermediate structure, which holds SPI registers.
• Work Queue: Added support for delayable work queue items, with a sample demonstrating this feature.

Minor Changes:

• Stored MCUSR at startup using the CONFIG_KERNEL_MINICORE_SAVE_RESET_CAUSE option.
• Introduced new configuration options:
  • Management of reset cause with CONFIG_KERNEL_MINICORE_SAVE_RESET_CAUSE and CONFIG_KERNEL_CLEAR_WDT_ON_INIT.
  • Addition of an idle hook through CONFIG_IDLE_HOOK.
  • Enabling of the delayable work feature with CONFIG_WORKQUEUE_DELAYABLE.
  • CONFIG_SERIAL_AUTO_INIT.
  • Banner configuration options CONFIG_AVRTOS_BANNER_ENABLE and CONFIG_AVRTOS_BANNER.
  • Various options for the I2C driver.
• Updated samples and documentation.
• Removed unused USART functions and eradicated obsolete code.
• Moved assembly files to src/arch.
• Improved overall error code returns and extended support for CONFIG_KERNEL_ARGS_CHECK.

Bug Fixes:

• Fixed CONFIG_KERNEL_AUTO_INIT with the Arduino framework by utilizing the initVariant() function.

Documentation and Samples:

• Enhanced documentation.
• Added new samples demonstrating various features:
  • MCP3008 and TCN75 driver samples.
  • Arduino sample MinimalExample.

Full Changelog: v1.1.0...v1.2.0