Re: [avrdude-dev] USBasp improvements

[Thomas Fischl]

Joerg Wunsch wrote:

> You can never get too slow. :-) You could have a device being clocked
> from a 32 kHz crystal oscillator, and with a CKDIV8 fuse programmed,
> so the resulting CPU clock frequency were 4096 Hz.  In that case, the
> ISP clock must be below 1024 Hz... (and be it only in order to
> unprogram the mistakenly programmed CKDIV8 fuse again :).

Okay. Then we should leave the software SPI function in the USBasp
firmware and make the clock delays in it variable. This function can be
used for frequencies lower than 187.5kHz and the hardware SPI for faster
clocking.

Thomas