2009/6/23 Xiaofan Chen <xiaof...@gmail.com>: > 2009/6/23 Audrius Urmanavičius <didele.d...@gmail.com>: >> On Mon, Jun 22, 2009 at 10:30 PM, Duane Ellis<open...@duaneellis.com> wrote: >>> All - I believe - I am not sure - that the primary benefit of >>> "libft2xxx" is as follows: >>> >>> (a) It is measurably faster. >>> >>> That just requires "work" to make it faster. >>> >>> (b) It works on more platforms, ie: Win7, WinVista, because drivers >>> exist for those platforms. >>> >>> This is tough/hard, nobody on this list is a "windows driver developer". >>> Grrr. Such is life. >>> >>> (c) Nobody was offering a universal "libusb" - type "INF" files for >>> windows. >>> >> >> I bet you missed the d) option, which I personally would have placed >> above a) - it is dual serial port support, in particular - RS232 >> besides JTAG. This is very important to me (I believe at least one >> more developer is using serial and JTAG). I could live with decreased >> download speed, maybe would agree to somewhat slower debugging >> stepping speed, but I just won't bother to install libusb & co. if I >> loose RS232 (currently ARM-USB-OCD adapter is also the only serial >> port on my notebook). >> > > Is it really that bad? I guess many of us will have a USB to serial > converter anyway (roughly US$10-20). Do you have extra USB ports > on your notebook? If not, then a US$10 4-port hub may be the > way to go.
Actually I wouldn't call this "too bad", just a "major inconvenience". My notebook has just 2 USB ports, and carrying around a hub + two dongles (JTAG and separate RS232) with small 12" notebook, especially when programming/troubleshooting devices on client's site is somewhat too cumbersome. It also uses additional power and I am afraid I may face hard-to-track troubles when hub+adapters exceeding 500mA; self-powered hub is not an option here. Also, since I have working build environment for OpenOCD, it makes no problem now to build OpenOCD myself, I do not need prebuilt binary. I just afraid that OpenOCD would drop libft2xx support altogether to settle the dust down. > By the way, the serial port situation is not exactly clearly to me. > Maybe there is a solution. I just do not have the hardware to test > right now. AFAIK the current open source FT2232 drivers/libs lack dual-port'ness support (I would be more than glad if I am mistaken here). Maybe they will in some future, but I do need to do my job now, and I do with libft2xx quite successfully. Kind Regards, Audrius _______________________________________________ Openocd-development mailing list Openocd-development@lists.berlios.de https://lists.berlios.de/mailman/listinfo/openocd-development
