On Thu, 7 Nov 2002, Boris Dainson wrote: >It's 48ms for one data byte over I2C and 48x20=960ms for a complete packet >of 20 bytes that the app has to exchange with the device (I wrote "up to a >second"). There are a couple of tricks to speed things up but it'll still be >slow and will affect perforamnce of the system. The point I'm trying to make >is that such things really matter when an application is using syncSubmit a >lot and has certain latency requirements. It'll be great to speed things up >if possible...
48ms...? I thought you said 9-12ms per syncSubmit...? So, I'm confused - does I2C require sending a 1-byte submission, 20 times? Or do you send a single 20 byte submission, that takes a full second to finish? And if so, is the USB subsystem causing the delay, or I2C...? -- Dan Streetman [EMAIL PROTECTED] --------------------- 186,272 miles per second: It isn't just a good idea, it's the law! ------------------------------------------------------- This sf.net email is sponsored by: See the NEW Palm Tungsten T handheld. Power & Color in a compact size! http://ads.sourceforge.net/cgi-bin/redirect.pl?palm0001en _______________________________________________ javax-usb-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/javax-usb-devel
