simavr – 8 Bit AVR simulator

Placeholder wiki homepage for simavr.

Supported Cores

EEProm
- Load from ELF file, and allow re-programming from the firmware
Watchdog Timer
- With WDT instruction support
Flash Self Programming
- Support for the Arduino bootloader
8 and 16 Bits Timers
- Normal Mode (mode zero)
- CDC Mode (with interupts)
- Fast PWM Mode
- TCNT reading/writing
- Some mode using the ICR
- Input Capture, proper
- TODO Phase Correct PWM Mode
UART
- RX/TX Interrupts
- External FIFO
- Baud calculation
- Flow Control for external code
- TODO UART in SPI mode.
SPI
- Master with interrupt
- Slave
IO Ports
- PCINT all working
External Interrupts
- All hooked up to proper IO Port pins
ADC
- Core Voltages can be set in the ELF file
- ADC simavr module handles conversion to millivolts

GDB support
- Can run in “active mode” (CPU stopped until connection)
- Can run in “passive mode” (gdb is not activated until a crash)
- Can run in “AVR” mode (gdb server is launched if AVR used “BREAK” instruction)
- Can be totaly disabled too, but given the useful passive mode, theres no real need.
VCD Waveform File Creator
- Up to 32 traces per files
- No practical limits how many files are open (20+)
- Used Internal IRQs so is non-intrusive
ELF file loader
- Load the .eeprom section
- Special ELF section contains TAGS that can pass parameters to the emulator, without changing the compilation options for the firmware.
  - CPU Name Tag
  - CPU Base Frequency Tag
  - CPU Voltages for VCC/AVCC/AREF (For the ADC source voltage)
  - VCD File Name Tag
  - ADD a VCD trace (IO Register only!) Tag
  - Specify a “command path” to send commands to simavr from the firmware (!)
IHEX file loader
- Supports multiple section in HEX (flash, eeprom & fuses)