Results 1381 – 1400 of 2193.
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 | | Re: A/C Adapter for RCX 1.0
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| (...) When a fellow MichLUGer brought up the question of hooking up an external power supply to a 2.0 RCX, a lot of these interesting little facts popped up. From the way it sounded, the RCX has a maximum amperage draw, and each side of the bridge (...) (21 years ago, 31-Mar-04, to lugnet.robotics.rcx, FTX)
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long
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usb
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usb
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| | Re: Trigonometry and NQC
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| Hi Richard, No, NQC does not implement any of the trig functions. However, you can do it yourself. The idea is to use a second order polynomial to approximate the sine function. You can get pretty good accuracy (within about 5%) if you break up the (...) (23 years ago, 12-Dec-01, to lugnet.robotics.rcx.nqc)
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range
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| | RE: [long] Interrupt programming, buggy code
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| Having fun yet :-) There are a few things you might want to keep in mind when writing ISRs for the RCX... First, avoid calling into the ROM from an interrupt handler. You never know how long they take, and you may in fact be hitting another OCIA (...) (21 years ago, 2-Mar-04, to lugnet.robotics.rcx)
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long
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| | Re: [long] Interrupt programming, buggy code
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| On Tue, 2 Mar 2004 17:54:47 GMT "Mark Riley" <markril@hotmail.com> wrote: Hi Mark, (...) [snip] (...) [snip] And that was it, indeed! Many to you, as well as Ralph and Kevin who tried to help me. There shouldn't be much trouble for me I think (if we (...) (21 years ago, 2-Mar-04, to lugnet.robotics.rcx)
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| | Re: [long] Interrupt programming, buggy code
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| Hi Benjamin, When you declare your ISR as an interrupt_handler, GCC terminates the function with an "rte" instead of an "rts". The ROM code that dispatches the interrupt to your function is already doing the rte so your function should not. Here's (...) (21 years ago, 2-Mar-04, to lugnet.robotics.rcx)
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long
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| | [long] Interrupt programming, buggy code
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| Hi all, I am currently programming the Lego RCX at low-level (plain C) using the GCC cross-compiler for Hitachi H8/300 and Kekoa Proudfoot's LibRCX. In fact, I'm designing exercises for students that learn micro-controller programming. Therefore, I (...) (21 years ago, 2-Mar-04, to lugnet.robotics.rcx)
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long
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| | Re: COLOR light sensor
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| I toyed some time ago with the idea of colored leds to provide color information to RCX - I didn't construct anything yet. I intended to use R/V/B leds (the addition of an IR one is a good idea) with an RCX controlled cycling mechanism to light the (...) (23 years ago, 29-Nov-01, to lugnet.robotics.rcx)
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ir
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| | Re: Ideas for NQC
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| (...) Well, it won't be easy. It doesn't help that I've been working long hours at my day job either. But I'll do my best. (...) [...] (...) In C & C++ it is not optional to use a semi-colon at the end of a line. The same goes for Java, C#, and (...) (21 years ago, 9-Mar-04, to lugnet.robotics.rcx.nqc)
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long
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| | Re: COLOR light sensor
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| (...) VERY interesting! I was just talking with someone at the last SMART meeting how cool it would be if there was a colour light sensor. I can't wait to read more about it! Keep us informed how you do with it. I'm not exactly sure what a reading (...) (23 years ago, 28-Nov-01, to lugnet.robotics.rcx)
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ir
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| | Re: RIS2 Upgrade on W95 & Pentium(I)
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| (...) Well, I have a fully functional RIS 1.5 including the serial tower. I got the RIS2 "Upgrade" disk from S@H. It's installer checks for OS and bails when it finds W95. And, of course, the .cab files are password protected, so, none of this (...) (23 years ago, 21-Dec-01, to lugnet.robotics.rcx, lugnet.robotics)
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tower
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| | Re: [long] Interrupt programming, buggy code
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| (...) All I can give you is guesses. There are pleny of gurus here who will know the answer. Do you know if the display_debug() routine or any of the things it uses depends on the interrupts you are taking over? If default interrupt handler provides (...) (21 years ago, 2-Mar-04, to lugnet.robotics.rcx)
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long
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ir
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| | Re: Spurious bad readings from sensors
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| (...) Because of the way BrickOS uses interrupts to handle active sensors, it's possible for sensors to be deprived of power for 300us or more, though typically the interval is only 30us or so. This is due to long interrupt latencies in BrickOS that (...) (21 years ago, 25-Feb-04, to lugnet.robotics.rcx.legos)
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long
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| | Re: How do I use WinLNP?
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| Tom, I'm struggling with WinLNP too. Tried to compile the LegoStudio prog in VC++6, but keeps hanging up. Don't think my old laptop is up to VC++6, or maybe I need the patch that is mentioned in other messages. In the meantime I have been using the (...) (23 years ago, 16-Nov-01, to lugnet.robotics.rcx.legos)
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ir
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