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(...) Hi Juergen, Yes, I found this night the entries at Lego-Source-Code... and no line about P-NET-Protocol... My first thought was to implement a simple p-net-node at own MCU, but now I can try my own communication from NXT (master) to external (...) (19 years ago, 10-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 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 (...) (19 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! (19 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 (...) (19 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 (...) (19 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 (...) (19 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 (...) (19 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) ? (...) (19 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 (19 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 (19 years ago, 9-Apr-07, to lugnet.robotics.nxt)
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