RE: [avr-chat] New Programmer, Small Program, F_CPU for Atmega644

[Weddington, Eric]

> -----Original Message-----
> From: address@hidden 
> [mailto:address@hidden
>  On Behalf Of Robert L Cochran
> Sent: Friday, March 21, 2008 3:29 PM
> To: avr-chat
> Subject: [avr-chat] New Programmer, Small Program, F_CPU for Atmega644
> 
> I just built one of Limor Fried's USBtinyISP programmers. ( shown on
> http://www.adfruit.com/usbtinyisp ). I'd like to actually test the
> programmer on a Fedora 7 computer.
> 
> I have an Atmega644 in the DIP package that I could breadboard with a
> quick LED blinking circuit. Since I'm doing this in Linux, 
> I'm not sure
> what is a good value to assign to F_CPU, and yes, I did check the 376
> page data sheet, but I am still not sure how to calculate 
> this value --
> sorry.
> 

Hi Bob,

F_CPU is just a defined value which is your CPU Frequency in Hertz. This
symbol can then be used in your application if you need it.