Arduino-like peripheral drivers for the ATtiny817 Xplained Mini boards

• For UART to work, DTR must be enabled (when using the mEDBG programmer's USB2UART converter)
• For some utilities to work (for example, the millis() function), you need to call hal_init() at the start of the program!

• GPIO basics
  • digitalWrite()
  • digitalRead()
  • pinMode()
• Misc. functions
  • delay()
  • map()
  • millis()
• Serial
  • begin()
  • available()
  • read()
  • write()
  • print()
  • println()

• Misc. functions
  • delayMicroseconds()
  • micros()
• Math
  • constrain()
  • max()
  • min()
  • pow()
  • sq()
  • sqrt()
• Analog
  • analogRead()
  • analogReference()
  • analogWrite()
• Serial
  • availableForWrite()
  • end()
  • find()
  • findUntil()
  • flush()
  • parseFloat()
  • parseInt()
  • peek()
  • readBytes()
  • readBytesUntil()
  • setTimeout()
  • serialEvent()
• SPI
  • requestFrom()
  • beginTransmission()
  • endTransmission()
  • write()
  • available()
  • read()
  • SetClock()
  • onReceive()
  • onRequest()
• I2C
  • begin()
  • end()
  • beginTransaction()
  • endTransaction()
  • setBitOrder()
  • setClockDivider()
  • setDataMode()
  • transfer()
  • usingInterrupt()