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Hi Christian, (...) the RS-485 interface is directly connected to the AT91SAM7S USART, so you can choose the bit rate quite freely. (...) No, it is not necessary, P-Net is just a field bus which seems to be popular in Denmark, there are others which (...) (18 years ago, 10-Apr-07, to lugnet.robotics.nxt, lugnet.robotics.nxt.nxthacking)
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| | Re: EggArt - a 4-colour Easter egg painting robot
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(...) Wonderful. This is not the typical Mindstorms Printer, of course ^_^ Congratulations David! (18 years ago, 10-Apr-07, to lugnet.robotics.nxt)
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| | Re: Using NXT Port 4 EIA-485
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(...) Hi, halfduplex is not the problem when connecting the NXT to an external MCU. My problem is the bitrate of 921,6 kbits/s. Simple cheap MCU like ATMega didn't support this bitrate (as far as I know). To add an external devices (e.g MCU+SD-Card (...) (18 years ago, 9-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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(...) Hi John. I must have misunderstood something I was told a while back which went along the lines of "there isn't enough time to implement support for this feature". Perhaps there was some time after all ;) Do you know how large the OutBuf and (...) (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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(...) Congratulations on getting your egg painting robot done! Looks like you got your pen mechanism working exactly as you planned. Very nice! (...) What do you mean; I think the eggs are beautiful! But I think you should write "Happy Easter" on (...) (18 years ago, 9-Apr-07, to lugnet.robotics.nxt)
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| | 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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