On Mon, 29 Jun 2009, Vincent Trouilliez wrote: > Thanks Daniel and Roger ! > > I have now my anwser... even if not a pleasing one. > > Geez, I bought a USB programmer and Dragon, thinking it would be way > faster than my antic // cable... only to find out it's exactly the > opposite ! How ironic, antic interfaces that smoke circles around > modern ones ! Likewise, me thinks the old serial port is unlikeley to > die anytime soon then...
If you use it the right way it IS faster. USB, like PCIe and other busses is a high latency high throughput thing. FIFO memory is cheap and allows faster performance with less synchronisation which is good when you have a lot of cores :) > Oh well, I will just put my Dragon in a drawer and use my // cable > again. I will just need to buy an extra // interface card for my > computer (because my printer is on the // port too, and I got tired > of swapping all the time, one of the reasons I wanted USB !), but I > doubt it will cost me more than this door stop of a dragon ! Hell no, > even as a door stop it's no use ! ;-/ > Well, lesson learned... newer, shinier and more expensive is not > always better or even as good... far from that. I don't understand why you don't use -U? It is just as fast as the old parallel cable I use but saves a bunch of CPU time (not that it is a big issue). I am using it in ISP mode, I have used it in JTAG mode too, but most recently I was updating firmware on a board which didn't have JTAG, it worked just fine. -- Daniel O'Connor software and network engineer for Genesis Software - http://www.gsoft.com.au "The nice thing about standards is that there are so many of them to choose from." -- Andrew Tanenbaum GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C
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