 | | USB vs Serial Tower Response Time
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Several recent posts have mentioned significantly slower performance of the USB Tower when compared to the serial Tower. After several measurements, I've concluded that the USB Tower is "natively" only slightly slower (~20 milliseconds per message) (...) (21 years ago, 21-Aug-03, to lugnet.robotics.rcx)
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| | RE: USB vs Serial Tower Response Time
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(...) <snipped long post> Dick, This is a remarkably detailed analysis of the difference between the USB and serial towers. It also contains many useful hints about the preamble bytes and other esoteric things about the LEGO protocol. I have an dea (...) (21 years ago, 21-Aug-03, to lugnet.robotics.rcx)
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| | Re: USB vs Serial Tower Response Time
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Wow, that answers a lot of questions, all but one: why is the USB's 'long range' shorter than the Serial's distance? Was my speculation of the available power true? (500mA vs 9v ... not sure if these two measurements can be compared) (...) <snipped> (...) (21 years ago, 21-Aug-03, to lugnet.robotics.rcx)
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| | Re: USB vs Serial Tower Response Time
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Dick, thanks for posting this information. I have some USB code I need to do some more work on and this should prove very useful! Mark (21 years ago, 22-Aug-03, to lugnet.robotics.rcx)
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| | Re: USB vs Serial Tower Response Time
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(...) Dick If, by chance, BricxCC (or NQC) happened to be the popular program to which you refer I'd love to hear more details about your software tests and the code you use for communicating with the RCX via the USB tower. I'm not particularly (...) (21 years ago, 22-Aug-03, to lugnet.robotics.rcx)
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