From: Mark Y. <mya...@gm...> - 2006-06-25 00:26:28
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Dave, ok. Thanks. That actually does answer my question. Mark On 6/24/06, Dave Hylands <dhy...@gm...> wrote: > > Hi Mark, > > > I don't think i was very precise with my NACK question. > > > > In the case that the master fails to recieve a signal, a NACK will be > > returned in like 8 clock cycles (Im not sure about 8 but w.e). So the > > question is: is the data transmission consistent, i.e will data packets > > dissapear and I will get back NACKs when I just sent a byte of data or > will > > it be like I sent a byte and get an ACK (if the where I am sending is > > expecting data) no matter what? > > I don't understand what you mean by consistent. > > i2c doesn't specify any NACKs other than the ones I mentioned (where > it uses a NACK on a byte by byte basis). > > i2c has no notion of retrying. You need to build this layer yourself > if you want (although this would only work for devices where you can > control both sides). > > i2c also has no notion of message integrity. SMBus introduces a CRC, > but the way its implemented only partially ensures message integrity. > > -- > Dave Hylands > Vancouver, BC, Canada > http://www.DaveHylands.com/ > > Using Tomcat but need to do more? Need to support web services, security? > Get stuff done quickly with pre-integrated technology to make your job > easier > Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > |