Re: Re[2]: [avrdude-dev] AVR910 Programming speed

[E. Weddington]

On 3 Apr 2003 at 21:07, Bertolt Mildner wrote:

 
> EW> This is just a guess.
> 
> EW> The avr910 is a serial port based programmer. Currently avrdude
> does EW> all serial communications through POSIX calls, which for
> Windows, has EW> to go through the Cygwin layer (dll) before it gets
> to the Windows EW> OS. Perhaps this could be slowing it down?
> 
> Sorry, but I can't imagine how the POSIX wrapper could have such a
> dramatic effect! But have to admit that I don't know the POSIX
> interface to RS-232 nor do I know the Cygwin POSIX wrapper.

Honestly, nor could I. As I said, it was a (perhaps not a good) 
guess.
 
> My guess would be that the POSIX wrapper adds perhaps some ms (more
> likely only some us).

Agreed.
 
> 
> What was the rational behind swiching to the Win32 API?
> 

To hopefully build avrdude under MinGW instead of Cygwin. This would 
hopfully remove the dependency on a Cygwin DLL. One of my goals in 
WinAVR is to have no Cygwin dependencies on any of the toolset 
programs; have them all be native win32 executables.

Ted's response to this outlines the most probable culprit. Have a 
look.

Eric