Subject:
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Re: Using NXT Port 4 EIA-485
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Newsgroups:
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lugnet.robotics.nxt
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Date:
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Mon, 9 Apr 2007 01:06:26 GMT
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Viewed:
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19835 times
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In lugnet.robotics.nxt, John Barnes wrote:
> In lugnet.robotics.nxt, Christian Mock wrote:
> > Hi,
> > is there currently any software-support (pbLua, NXT-G, NXJ) for NXT Port4
> > highspeed serial communication (EIA-485) ?
> > Thanks for more informations
> > Christian
>
> 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 that, eventually, it will be supported.
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 work properly where if you write to the HSOutBuf and
properly set the HsState and HsFlags values that it will send data and receive
data into the HSInBuf. What sort of additional support is needed to make this
interface (more) useable?
John Hansen
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Message has 2 Replies:
 | | 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)
| | | 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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Message is in Reply To:
| | 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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