Re: [avr-gcc-list] My first time with AVR (help)

[Rod Moffitt]

The Xilinx parallel cable does not provide power, is sinks power from the
target board (without power it won't work at all). The schematics are
available on the Xilinx web-site that show this (see 'Figure B-1 Parallel
Download Cable' of the 'JTAG Programmer Guide Introduction Hardware').

If the board is indeed off then I have no idea how uisp could talk to it.  
Perhaps it's a bug in uisp that automagically claims communication is up,
yet only for certain devices? 

Helix, from your other post it appears you have very little AVR design 
experience. Before attempting to hack together (what will be a very 
simple program, indeed) you really need to read over the following 
docs:

'A GNU Development Environment for the AVR Microcontroller'
'AVR libc Reference Manual'

(you can find these at my site: http://rod.info/avr.html)

The first doc gives detailed examples on how to start building a simple
program that can drive GPIOs, and should answer all of your questions.

Good luck,

- Rod

--
                         ___  ____  ___    _      ___
 Rod Moffitt            / _ \/ __ \/ _ \  (_)__  / _/__
 http://rod.info       / , _/ /_/ / // / / / _ \/ _/ _ \
 address@hidden /_/|_|\____/____(*)_/_//_/_/ \___/
 =======================================================
 ~ Where loved ones are remembered http://memoriam.org ~

On Sat, 17 Jan 2004, Herb Peyerl wrote:

> "Helix" <address@hidden>  wrote:
>  > I need to understand two things:
>  > 1. If the 8515 is alive and the xilinx cable is properly connected.
>  > to do that I've done
>  > # uisp -sprog=xil -dpart=AT90S8515
>  > and I get back
>  > Atmel AVR AT90S8515 is found
>  > Unfortunately this string appers also if I have the board turned off :-(
>  > However, let's suppose it's up and running :-)
> 
> your programmer is probably supplying all the power the board needs.  In 
> fact, a lot
> of the targets I work on are powered by my programmer just because I'm lazy. 
> 
> 
> ---
> Real PC Serial console & remote reset - The PC Weasel! 
> http://www.realweasel.com
> 
> _______________________________________________
> avr-gcc-list mailing list
> address@hidden
> http://www.avr1.org/mailman/listinfo/avr-gcc-list
>