>-----Original Message-----
>From: Alan B. Pearce [mailto:A.B.Pearce@RL.AC.UK]
>Sent: 16 April 2004 09:21
>To: PICLIST@MITVMA.MIT.EDU
>Subject: Re: [PIC/AVR] PIC vs AVR (ATMEL)
>
>
>>Agree fully. The GNU toolchain is supererb. Also, you know the
>>toolchain from other work (if you used it, that is work on
>Linux). But
>>the price for Atmel chips are a bit high so I often ends up
>with a PIC
>>micro in my designs anyway. Atmel has been a bit nicer with samples
>>latly but not as good as Microchip. But in most other aspects
>they are
>>the same. Its easy to work with both. I tend to favor an AVR when I
>>code in C and a PIC when I code in assembler.
>>
>>>If you really want to know the power of AVR, it's the
>availability of
>>>free C compilers, and the stack.  Instead of having a hardware based
>>>stack, with a preset depth, you're limited only by your memory
>>>availability.  These chips are extremely nice to program in.
> ASM, or
>>>C.
>
>Is the stack issue still an issue with the 18F series? The
>impression I have is that it is possible to have a larger
>stack, but then I haven't studied them that much yet to
>actually try it. Then with the various compilers available for
>the 18 series the architecture differences between the two
>makes would more or less vanish.

The 18F still has a hardware stack, although it has a much more realistic
depth of 32 rather than the 8 of the 16F parts.  The big difference is that
the stack can be manipulated through push and pop instructions, which gives
the ability to implement a software stack.

Regards

Mike




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