 | | RE: NXT external storage
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(...) Yes. RobotC already supports an optional "fast" mode that is five times faster transmission when reading a single byte. For reading multiple bytes from an I2C device, RobotC is about 15 times faster than the NXT-G firmware. There are a couple (...) (18 years ago, 9-Apr-07, to lugnet.robotics.nxt)
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| | Re: Using NXT Port 4 EIA-485
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(...) Do you think it is possible to read/write binary and ascii data to this device or is there a special protocol neccessary ? What about bitrate of EIA-485 device ? Is it possible to adjust bitrate to anything more usable (9600, 38400, 115200) ? (...) (18 years ago, 9-Apr-07, to lugnet.robotics.nxt)
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| | Re: NXT external storage
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(...) Yes, 9600 bits/s is really slow for storage access. Is there a known way to increase the clock and transferrate of I2C ? Christian (18 years ago, 9-Apr-07, to lugnet.robotics.nxt)
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| | Re: EggArt - a 4-colour Easter egg painting robot
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(...) The promised videos (1-2Mb each): (URL) at 11Mb: (URL) David Schilling (18 years ago, 9-Apr-07, to lugnet.robotics.nxt)
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| | Re: Using NXT Port 4 EIA-485
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(...) What is not supported about this port in the standard NXT firmware? You can read from it and write to it using the IOMapRead and IOMapWrite syscall functions. Looking at the firmware source code it certainly looks like everything is setup to (...) (18 years ago, 9-Apr-07, to lugnet.robotics.nxt)
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| | EggArt - a 4-colour Easter egg painting robot
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Just in the nick of time, the day before Easter, I completed building a 4-colour NXT Easter egg painting robot. I started building it several months ago, when I thought I'd have plenty of time before Easter. Of course, at about the 85% complete (...) (18 years ago, 9-Apr-07, to lugnet.robotics.nxt, lugnet.org.us.smart) !
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| | RE: Using NXT Port 4 EIA-485
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I've looked at implementing an interface for RobotC, but I've always struggled with why bother since there are no applications that connect to it. I wish LEGO had implemented an option to provide a logic level "RS-232" UART on port four. Yes, I (...) (18 years ago, 8-Apr-07, to lugnet.robotics.nxt, lugnet.robotics.nxt.nxthacking)
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| | Re: Using NXT Port 4 EIA-485
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(...) As far as I know, there isn't any support for this interface in either the standard firmware or any of the other third party firmware implementations. The interface runs at 921,600 bps so it will be fast enough to be really useful. I am hoping (...) (18 years ago, 8-Apr-07, to lugnet.robotics.nxt)
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| | Re: NXT external storage
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(...) It may work, but it will be very slow. The NXT runs the i2c ports at only 9600kb/s, so the data will trickle to the NXT very slowly. (...) I think that the answer is yes. (...) (18 years ago, 8-Apr-07, to lugnet.robotics.nxt)
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| | Re: NXT BrickSorter - Sorting bricks with a HiTechnic colour sensor.
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(...) Thx for the comments. The design as it stands right now would not allow the sorter unit to rotate all the way around - not a bad idea though. I wanted to challenge myself with the angle idea on the sorter itself (2 rows of cups). With larger (...) (18 years ago, 8-Apr-07, to lugnet.robotics.nxt, FTX)
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| | Using NXT Port 4 EIA-485
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Hi, is there currently any software-support (pbLua, NXT-G, NXJ) for NXT Port4 highspeed serial communication (EIA-485) ? This port can be used for connecting some new hardware (camera, SD-Card-storage) to the NXT... Thanks for more informations Bye (...) (18 years ago, 7-Apr-07, to lugnet.robotics.nxt)
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| | Wishlist for next pbLua Beta
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Hi, current version of pbLua (Beta-3) works very well for me :D But now I have some more wishes for the next versions: 1. Filesystem (storing chunks and data at NXT) 2. Console via BT (I have autonomous robots with cable) 3. Audio e.g (...) (18 years ago, 7-Apr-07, to lugnet.robotics.nxt)
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| | NXT external storage
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Hi, what are you thinking about extending the NXT with an external storage for more sounds or karthographic data ? A simple hardware interface NXT==>I2C==>IOPort==>SD-Card is not the problem, but how can this supported by operating system (e.g (...) (18 years ago, 7-Apr-07, to lugnet.robotics.nxt)
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| | Re: NXT BrickSorter - Sorting bricks with a HiTechnic colour sensor.
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(...) Cool stuff, and a very elegant design. I was wondering if there is a reason you don't have cups all the way around the sorter? Have you tried to put the color sensor inside a housing to cut down on ambient light? And the real question the (...) (18 years ago, 7-Apr-07, to lugnet.robotics.nxt, FTX)
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| | NXT BrickSorter - Sorting bricks with a HiTechnic colour sensor.
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What better idea to come up with to test the HiTechnic colour sensor then to build a LEGO brick sorter. So, that’s what I did. After quickly learning that the sensor does not read colour from a distance (in my excitement I forgot to read the (...) (18 years ago, 7-Apr-07, to lugnet.robotics.nxt)
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| | pbLua: Ultrasonic Sensor usage
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Hi, I'm trying to use the us-sensor with pbLua, but without success. The result of reading a byte from sensor is allways 0. What means at HDK I2C Communication protocol: Read measurement Byte 0 : 0x02 0x42 R+0x03 (what is R+0x03) ??? Any idea ? (...) (18 years ago, 7-Apr-07, to lugnet.robotics.nxt)
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| | NXTRC: Using Bluetooth with NXT under Linux.
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Hi, I wrote a program that allows to communicate with a NXT brick under Linux using a Bluetooth link. With this program you can upload and download programs run them and other stuff. You can find more info and get the source at (URL). Our site is (...) (18 years ago, 6-Apr-07, to lugnet.robotics.nxt, lugnet.robotics)
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| | Logging from NXT to PC via Bluetooth
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I have been working for some time on an advanced NBC application that sends/logs data over Bluetooth from the NXT to a PC. The header for the file explains, in detail, how it works, so I'll just paste it here. It is compiled with a pre-released (...) (18 years ago, 6-Apr-07, to lugnet.robotics.nxt)
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| | Re: GCC vs. IAR compiler: Could GCC be tweaked to generate code as tight as IAR?
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(...) I read a paper that attributed most of the code size increases in gcc generated code to the printf library - search for AN52-ARM-C-Benchmark.pdf to read the paper. Out of curiosity I built the firmware using the newlib libc and the gcc 4.1.1 (...) (18 years ago, 5-Apr-07, to lugnet.robotics.nxt.nxthacking)
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| | RE: Faster NXT LCD Screen Refresh
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Change the init message for the LCD display driver to perform wrap around. Offset 12 in the following structure from 0x88 to 0x89. Otherwise it will keep overwriting the same line. Your code snippet doesn't show it, but I'm sure you kept the call (...) (18 years ago, 4-Apr-07, to lugnet.robotics.nxt.nxthacking)
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