libftdi Archives

Subject: Re: FT232H oddities in avrdude

From: Joerg Wunsch <libftdi@xxxxxxxxxxxxxxxxx>
To: libftdi@xxxxxxxxxxxxxxxxxxxxxxx
Cc:
Date: Thu, 15 Sep 2011 11:59:35 +0200 (MET DST)
In article <20081.3297.830397.151564@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> you 
write:

>Reading
>./avrdude -C ./avrdude.conf -c ftdijtag -p m16 -b 2000000 -U flash:r:test:i
>takes about 0.45 sec versus 1.75 sec with USB2 disabled on the system.

That's probably the result of the microslots on the high-speed hub.

>This doesn't seem strange to me, no factor 10 as you see.

Yes, this difference looks reasonable.

>Can you reproduce the strange results with an FT2232H or does it only happen
>with the FT232H?

I've only got an FT2232D-based board, and an UM232H one.

Let me repeat all this with libftdi-1 first.
-- 
cheers, J"org               .-.-.   --... ...--   -.. .  DL8DTL

http://www.sax.de/~joerg/                        NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)

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