Tempest
  • What is PDI
    • The component in the MCU
    • The instruction set
      • LDS
      • LD
      • STS
      • ST
      • LDCS
      • REPEAT
      • STCS
      • KEY
      • Size Rules
      • Pointer Rules
      • PDI Registers
        • Status Register
        • Reset Register
        • Control Register
        • Register r3
        • Register r4
    • Native PDI protocol
    • JTAG-PDI protocol
      • The TAP instruction register
      • Identification (IR = IDCode)
      • PDI Mode (IR = PDI)
        • PDI Frame Format
        • The conversation, a worked example
  • Memory Map
    • Processor Controller
    • Breakpoint Unit
    • Data Memory
  • Programming
  • Debugging using PDI
    • Getting started
    • Initiating a debug session
      • Put the processor into reset
      • Turn the debug interface on
      • Take the reset processor and put it in debug pause state
    • Running the processor to an address
      • Set up run-to-address
      • Set the program counter to a specific address
      • Run the program to breakpoint
      • Clean up
    • Reading processor state
      • Read program counter (PC+1)
      • Clean up verification
      • Read back Stack Pointer + SREG
      • Verify state
      • Reading back the AVR registers
    • Single Stepping
      • Setting up the breakpoint
  • License
    • CC-BY-SA 2.0
  • Contributors
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