Lpc2000

--- In lpc2000@yahoogroups.com, "Joel Winarske" <joelw@i...> wrote:
> For required interconnect signals see page 42 of the data sheet:
> www.profibuscenter.nl/page-downloads/_spc3_hardware_V1.2.pdf
> 
> You would need to bit bang an External Memory Interface(EMI).  It  
> would eat a good deal of your IO pins.
> 
> C driver software:
> www.profibuscenter.nl/page-products/products-spc3-software.htm
> 
> Perhaps someone who has implemented a bit banged EMI provide some
> input as to potential throughput.

I am in the same situation as the original poster.  Have you tried 
this Profibuscenter driver software?  Does it work, and does it look 
easy to change the memory-mapped interface to a bit-banging interface?

I don't think much performance is lost by bit-banging the bus 
interface since the lpc2000 can toggle outputs nearly as fast as the 
SPC3 allows.

Karl Olsen


> ----- Original Message ----- 
> From: "gfaurie1" <gilles.faurie@p...>
> To: <lpc2000@yahoogroups.com>
> Sent: Wednesday, September 28, 2005 11:22 PM
> Subject: [lpc2000] LPC + Profibus
> 
>> I'd like to link a LPC and a SPC3. The SPC3 protocol ASIC is
>> totally dedicated for the use as PROFIBUS DP slave. It manages
>> layer 1 and 2 of PROFIBUS.
>>
>> I'd like to find help on hardware and software, and to know if it's
>> possible to interface it.