Re: [avr-chat] Avrdude : how to slow it down ?

[Till Harbaum]

On Wednesday 14 September 2005 17:31, Bernard Fouché wrote:
> On kernel 2.6.x usleep(3) works well now. This was posted some time ago
> when kernel 2.4.x had some
The timer granularity is something that changed in the latest 2.6-kernels. I 
don't have the details in mind, but there has definitely been changes.

> granularity problems, I just ran it on kernel 2.6.12 and it was okay by 
> 1 or 2 ms:
A granularity of 1 or 2 ms may already be very bad if you are trying to do 
bit-banging on e.g. the printerport, since you might have several calls to 
these delay functions per bit. 2ms more delay than expected per bit will make 
the tansmission of 50kBytes require over 13 additional minutes (2ms * 50000 
bytes * 8 bits).

Ciao,
  Till

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