 | | Re: IR Tower —Dave Baum
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| | | (...) Almost nothing. Tx is just the TXD signal gated to send the 38kHz carrier. It also ties into a timer circuit for the auto-shutoff. Rx is a little more complicated - a filter/amp/comparator system to detect the presence of 38kHz IR. I think (...) (26 years ago, 23-Dec-98, to lugnet.robotics)
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| | | | | Re: IR Tower —Peter Hesketh
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| | | | | In article <dbaum-2212981930170...ract.com>, Dave Baum <lugnet.robotics@lugnet.com> writes (...) I have come across this statement (balanced 0's and 1's) several times but it is not quite true. It would be true if the RS232 frame was 8 data and no (...) (26 years ago, 23-Dec-98, to lugnet.robotics)
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| | | | | | | Re: IR Tower —Dave Baum
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| | | | | | (...) Right you are - but EE's often ignore effects less than 10% in calculations :-) I was referring to the practice of formatting the data such that a byte is always followed by its complement (except for the first part of a sync which is 0x55). (...) (26 years ago, 24-Dec-98, to lugnet.robotics)
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| | | | | Re: IR Tower —dave madden
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| | | | =>From: Paul Haas <paulh@hamjudo.com> =>... =>The RCX doesn't echo, the IR tower is seeing it's own signal reflected off =>the walls. It's either seeing its own signal, or Tx is looped back to Rx, or something. My generic IR adapter doesn't do that (...) (26 years ago, 23-Dec-98, to lugnet.robotics)
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| | | | | | Re: IR Tower —Ben Laurie
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| | | | (...) legOS doesn't run the static constructors/destructors. I think. Yet. So C++ may not work as expected. There's also something weird going on still with memory layout. BTW, do you have instructions for getting egcs working? I tried but it didn't (...) (26 years ago, 23-Dec-98, to lugnet.robotics)
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| | | | | | Re: IR Tower —dave madden
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| | | | =>From: Ben Laurie <ben@algroup.co.uk> =>... =>legOS doesn't run the static [C++] constructors/destructors. I =>think. Yet. So C++ may not work as expected. There's also =>something weird going on still with memory layout. I can handle the c/dtors, (...) (26 years ago, 23-Dec-98, to lugnet.robotics)
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| | | | | | Re: IR Tower —John A. Tamplin
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| | | | (...) Look at the Hitachi H8/3292 documentation -- it has all of that for you. Briefly, ROM is 0x0000-3FFF, external address space is 0x8000-0xFB7F, internal RAM is 0xFD80-0xFF7F, external address space is 0xFF80-0xFF87, and the peripheral register (...) (26 years ago, 23-Dec-98, to lugnet.robotics)
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| | | | | | Re: IR Tower —dave madden
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| | | | =>From: "John A. Tamplin" <jat@Traveller.COM> =>... =>Look at the Hitachi H8/3292 documentation -- it has all of that for you. =>Briefly, ROM is 0x0000-3FFF, external address space is 0x8000-0xFB7F, =>internal RAM is 0xFD80-0xFF7F, external address (...) (26 years ago, 23-Dec-98, to lugnet.robotics)
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| | | | | | Re: IR Tower —Ben Laurie
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| | | | (...) A thing Markus doesn't explain very clearly (if at all) is that if you hold down Prgm and switch it on, legOS vapourises, so you only have to do the battery trick when you crash it. Cheers, Ben. (26 years ago, 24-Dec-98, to lugnet.robotics)
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