Electronic – How to upload code to AtMega2560 using JTAG ICE 2.0

I believe I may have found a two part solution for my particular problem. I currently own an Arduino Diecimila (which has the ATMEGA168 with the problem) and also a new Arduino Nano 3.0. I went ahead and flashed the Arduino Nano with the ArduinoISP firmware. I then picked up 3 28 Pin ATMEGA328P DIP chips for $5.00 each at the local electronics store.

I used the ArduinoISP to flash one of the virgin chips with the Arduino Firmware using the above link with a crystal. I plan to now flash one of the other ATMEGA328Ps with the High Voltage Programmer firmware. This chip along with a bit of wiring on a breadboard should allow me to reset all of the fuses on the original ATMEGA168. Once that is done, I will be able to use the Arduino Nano to reprogram the chip.

Since the ATMEGA328Ps only cost $5 each, my end goal is to setup one 328 as an Arduino ISP programmer, setup the 168 as a HV Programmer, keep one 328 chip in my current Arduino Diecimila (upgrade!!), and I'll have one left over for whatever. I can then either switch chips on the Diecimila or build out a real board for the ISP and HV Programmer boards.

I still have not tested the JTAG ICE MKII yet with a logic/oscilloscope. Not sure if it is the root of the problem or not. I will address this issue after I build the HV Programmer.

I will report back on the success/failure of the HV Programmer. I just need to go get a few more 1K resistors to pull it off. Anyone ever tried the HV Programmer? Any other suggestions? If nothing else, hope this helps someone.

Here is an Arduino Simulator. There's a "Pro" version, which costs $5 now but will later cost $50, as well as a free version with a time-delayed startup but otherwise full functionality.

This isn't a way to debug on the AVR Studio 5 Simulator, but it offers similar functionality within its own IDE:

According to the linked website, it includes the following features:

• Steps through the program line by line. If a new line is selected, the program will continue from that point.
• Performs digitalWrite, digitalRead and PinMode for pins 0-21
• analogRead for pins 0-5 and analogWrite for digital pins 0-13
• Serial output data and input emulation for Serial, Serial1 and SoftSerial
• Emulates LCD output
• If,while,for loop functionality
• Subroutines (multi-level) with arguments
• View variables in real-time
• Step Into, Step Over, Step Out of or AutoStep run mode
• Ability to edit sketch or open in Arduino IDE
• #include code
• Undock output emulation Serial and LCD windows
• Context-sensitive help

See the software datasheet for more information.