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 Robotics / RCX / legOS / *1879 (-10)
  Re: Floating ponts ??
 
Hi there! (...) 0th law of computer science: NEVER use == on floats; it simply doesn't work as expected. In most cases a value cannot be exactly represented as a float variable; so MOST comparisons for equality WILL fail. (this is NOT an issue of (...) (23 years ago, 17-May-01, to lugnet.robotics.rcx.legos)
 
  Re: lnpd
 
Ah. Those links. I have asked Markus to move those a couple of times but he no longer responds to my emails. I'm afraid that until he does those links will remain in place (and remain quite dead.) Sorry... Luis (...) ---...--- "Nobody ever said that (...) (23 years ago, 16-May-01, to lugnet.robotics.rcx.legos)
 
  Re: lnpd
 
(...) This is old news, but I didn't find any answer to it while there are still two such links on (URL) the Doc section, the link to the HOWTO points to (URL) in the File section, the link to the Windows 9x/NT compiler points to (URL) (23 years ago, 16-May-01, to lugnet.robotics.rcx.legos)
 
  Re: permissions
 
(...) Thanks! But rather than do things for a single user I opted for: chmod 666 ttyS0 If I'm not mistaken, this will give every user access to Serial port 0 (comm 1). Since my system only uses comm 1 for the lego tower this seems like a safe thing (...) (23 years ago, 15-May-01, to lugnet.robotics.rcx.legos)
 
  Re: permissions
 
the following error as a user. [James@Sauron demo]$ ../util/dll helloworld.lx open: Permission denied opening tty: Permission denied To what directory or files does my user need permission? I tried using a find on tty to no avail. A little help? if (...) (23 years ago, 15-May-01, to lugnet.robotics.rcx.legos)
 
  permissions
 
Hello, The first thing I have ever installed on a *nix platform was legOS on my recently (last week) converted Redhat Linux PC. I didn't really know how this sort of thing is supposed to work, so I did the whole install as root. Of course after I (...) (23 years ago, 15-May-01, to lugnet.robotics.rcx.legos)
 
  Re: API changes
 
I agree with most of Luis statement. I've worked for three years in the embedded software development (for cars), and I think it's quite dangerous to have RCX functions with the same name that Unix ones, because they don't do the same thing. Using (...) (23 years ago, 14-May-01, to lugnet.robotics.rcx.legos)
 
  Re: API changes
 
I'm actually on my way to my baccalaureate ceremony right now, but I do want to say that I feel very strongly that API changes for the sake of API changes should not be checked in. The current API, while not always intuitive, is well documented and (...) (23 years ago, 12-May-01, to lugnet.robotics.rcx.legos)
 
  Re: API changes
 
(...) I don't imagine that these changes will increase memory usage much, since they are largely just re-working existing features. I will look into the memory usage before releasing, though. In fact, I think that after I redid the networking a bit (...) (23 years ago, 12-May-01, to lugnet.robotics.rcx.legos)
 
  Re: API changes
 
My only concern with these proposed changes is possible increased memory usage. Encapsulation, error reporting, thread synchronisation etc are nice; but with just 32k of RAM I would question whether these are appropriate for some applications. For (...) (23 years ago, 11-May-01, to lugnet.robotics.rcx.legos)


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