Serial Port data to Excel sheet. whenever data comes on port.

Hi, I have DUE board.I want to store my Data Analog Read data to Excel. but i need to be done like following steps.

1) Whenever arduino board connect to PC/Laptop port it should automatically detect the board and set baud rate 250000. and other serial settings.

2)Whenever data comes on PC's /Laptop's port from the DUE board it should save entire data to excel file.

i am looking for easy solution and using free software. it should not need to be updated regularly basis.

what are the possibilities and software solutions.

Thanks

Check the PLX thread on this forum. I understand the max. baud rate for Windows is 115200.

1) Whenever arduino board connect to PC/Laptop port it should automatically detect the board and set baud rate 250000. and other serial settings.

What is "it" that should do this? Do you really think that Excel is going to do this?

2)Whenever data comes on PC's /Laptop's port from the DUE board it should save entire data to excel file.

Again, what is "it" that should do this?

It is easy to write an application that runs on the PC that can do this.