Lpc2000

nonuckingfumber wrote:

>--- In lpc2000@yahoogroups.com, "Rob Jansen" <rob@m...> wrote:
>  
>
>>Dear nonuckingfumber,
>>
>>OT: would it be possible to change your name into your real name, my
>>e-mail mind keeps thinking this is spam ...
>>    
>>
>
>I **hate** names with numbers in them, after an hour spent trying to 
>get Yahoo to accept any reasonable name with no numbers I ended up
>with this one out of desperation ;-) Perhaps I will have another go
>sometime...
>
>  
>
>>Note that the lpc2148 is the only device with the DMA buffer, other
>>menbers of the lpc214x group do not have this function.
>>
>>The ftdi solution will cost you something of 10-12 pins to interface to
>>the lpc210x if you take an ftd245 or a similar parallel interface. Using
>>an ft232 like device with a serial interface may not give you any
>>(technical) advantage on top of a standard UART connection...
>>
>>    
>>
>
>The 'advantage' is the that that serial ports are rapidly disaspearing
>on the latest generation of compact computers.
>
>
>  
>
>>The gotchas on the lpc2148 are still there. Look at the recent USB posts
>>in this group, it looks like USB is not fully stable and defenitely not
>>working on GCC (at least not publicly availale that is).
>>
>>The qestion if you should go for ftdi or lpc2148 is not that easy to
>>answer. If you want a standard mass storage or HID device I would go for
>>lpc2148, if you do handle every driver detail in a specific
>>(windows/linux) application I would currently still select the ftdi -
>>shorter time-to-market.
>>    
>>
>
>Yep, I think the FTDI is looking a winner, it's another chip but we
>all know how mysterious bugs and hiccups under a big OS can lead to
>unknown delays and frustrations.
>
>A collegue pointed out that RS232/USB adapters are available in bulk
>for a few dollars each, so I might just put a good RS232 driver that
>can do 230K and throw in an adapter free just in case the user has no
>serial port.
>
>BTW, this collegue also pointed out that RS232 can be used with line
>driver adapters (RS422) and ether/serial adapters where remote
>conection is desired (a possibility), something that cannot be done
>with USB. 
>
>  
>
Considering that in one installation, the customer didn't bother to read 
the manual and hooked up a long distance RS485 circuit: 14miles @ 1200 
baud!  We were very surprised that our equipment was working at that 
distance.  Normally, we would limit at somewhere near 5..7 miles.

Try doing that with USB...

Regards,

TomW


-- 
Tom Walsh - WN3L - Embedded Systems Consultant
http://openhardware.net, http://cyberiansoftware.com
"Windows? No thanks, I have work to do..."
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