ATTiny85 Debug Tools

Arduino ISP, debugwire and charge pump based HVP for ATTiny85

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This project is mostly based on code and circuits from Wayne's Tinkering Page

• debugwire2
• attiny-fuse-reset
• attiny-fuse-reset-with-12-volt-charge-pump

Modified curcuit

• see AttinyDebugTools.fzz Fritzing file

Usage

Can be started from Arduino Serial window, or using serial_debugger.py

 Commands:
  F - Identify Device & Print Fuses
  + - Enable debugWire DWEN Fuse
  - - Disable debugWire DWEN Fuse
  8 - Enable CKDIV8 (divide clock by 8)
  1 - Disable CKDIV8
  B - Engage Debugger
  < - Save Current Fuses
  > - Restore Saved Fuses
 High Voltage Programmer:
  R - Restore Saved Fuses (HVP)
  X - Hard Reset Fuses (HVP)
 Dev Commands:
  C - Send 4 Byte ISP Command
  P - Vcc On
  O - Vcc Off

Also included, serial oscilloscope

• arduino poor man's oscilloscope