Re: [avrdude-dev] Bad programming speed on AT90S8535 using AVRdude

[Brian Dean]

On Tue, Nov 18, 2003 at 07:04:17PM -0800, Theodore A. Roth wrote:

> On my athlon system with current, unpatched cvs source:
> 
>   Writing | ################################################## | 100% 17.62s
>   avrdude: 32052 bytes of f written
>   avrdude done.  Thank you. 
>   real    0m18.074s
> 
> With my patch:
> 
>   Writing | ################################################## | 100% 16.57s 
>   avrdude: 32052 bytes of f written
>   avrdude done.  Thank you.
>   real    0m17.046s
> 
> And again for grins, uisp is a tad slower than avrdude:
> 
>   Uploading: flash
>   ################################
>   (total 32052 bytes transferred in 19.04 s (1684 bytes/s)
>   Polling: count = 126, min/avg/max = 2.31/2.33/2.79 ms 
>   real    0m19.441s
> 
> Looks like linux just isn't as efficient with it's ppdev driver as FreeBSD 
> is with ppi.

Mine is also a 2200 Athlon vs your 1800 Athlon - that may account for
the difference instead.

Even though the programming times with vs without the patch don't show
a huge improvement, I still think some form of the patch should go in.
My original logic was flawed, which was exposed by address@hidden's
oscilloscope debugging, and brought into more light by Jan-Hinnerk who
noticed the flaw.

-Brian