v2.2.0

CRC and SAMD51 Support

Changed

• Added python version to GitHub actions (for PlatformIO)
• Switched to reusable workflows for GitHub actions
• Consolidated timer prescaler math
• Moved bitTimes and mul8x8to16 functions to the timers files
• Replace c-style casts with c++ style casts
• Do not disable interrupts during Tx for processors over 48MHz
• Cast all timer values and math to the proper type for the processor timer being read
  • SAMD21 boards now use the full 16-bits of the timer rather than only the first 8-bits.
  • AVR xU4 boards (ie, 32u4/Leonardo) still use the 10-bit timer as an 8-bit timer.
• Shortened name of espressif ISR access macro from ESPFAMILY_USE_INSTRUCTION_RAM to ISR_MEM_ACCESS
  • This does not change any functionality of the macro, just the name.
• Moved defines to the top of the SDI12_boards.h file
• Renamed the "tools" directory to "extras" in compliance with Arduino library standards.
• Updated copyright and license texts
• SAMD boards now partially revert clock and prescaler settings when an SDI-12 instance is ended.
  • Prescalers are reset to factory settings, the clock divisor is not reset

Added

• Added CRC checking
• Added support for SAMD51 processors using dedicated timers
• Added parity checking on character reception
  • This can be disabled by defining the macro SDI12_IGNORE_PARITY
• Allowing (without testing) processors over 48MHz to use micros() function
• Added a 'yield' function within stream functions to allow the buffer to fill
  • The yield time can be modified using the macro SDI12_YIELD_MS

Removed

• Offloaded some internal header file documentation to markdown files
• Consolidated redundant READTIME and TCNTX macros, removing TCNTX
• Removed documation m_span commands

Fixed

• Added an extra addition/removal of interrupts for espressif boards in the begin function to properly initialize the interrupts and avoid a later error with the gpio_install_isr_service.

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