Lpc2000

--- In lpc2000@yahoogroups.com, "Joel Winarske" <joelw@...> wrote:
>
> Hi Denny,
> 
> > I was looking at the Phillips LPC parts but it looks as though 
CAN and
> > USB are incompatible options (no parts have both) so my current
> > thinking is the LPC2129 and an external USB chip (probably FTDI)
> 
> Note the LPC2129 currently has some errata.  I understand all 
errata will be
> fixed in upcoming release sometime in May.  The LPC2129 implements 
a 32-bit
> version of the SJA1000.
> 

Interesting, what are / where can I find specifics about this errata?

> > 
> > Any better sugestions?
> 
> Depending on bus protocol and baud rate you could also consider a 
LPC214x
> with a SPI CAN interface.  Something along the lines of the PIC 
MCP2515,
> although once revised the LPC2129/32-bit SJA1000 will be a superior
> solution.
>  

Since it doesn't seem I can do USB _and_ CAN on naitive hardware, one 
will need to be an add on chip. I suspect it would be easier to do 
the USB as an add on because of the PC driver support for the FTDI 
products. It'll have to do CAN in real time, but it'll only need the 
USB when the mechanicals are stopped, so I thought on-chip CAN was 
the better trade off.

As to the CAN baud rate / protocol issues; I need 3 bytes of data 
from a sensor about 10 feet away in a very noisy enviroment about 
every 5mS. I have control over both ends of the system.

> > 
> > As to development hardware, What's everybody else using? I'm 
thinking
> > the LPC-P2129 board and JTAG programmer from Olimex - is their a 
better
> > option?
> > 
> > What is the current reccomendation for the software toolchain?
> 
> You might consider the IAR KickStart Kit for LPC2129:
> http://www.iar.com/index.php?
show=31418_ENG&&page_anchor=http://www.iar.com/
> p31418/p31418_eng.php
> 
> The KickStart version of the IAR compiler is free for unlimited 
time, and as
> a code limit of 32k.  The baseline version is limited to 256k.
> 
> Keil of course is another option.  I've used both and prefer the IAR
> debugger, but opinions are free and widely available ;)
> http://www.keil.com/arm/Default.asp?bhcp=1
> 
> For pricing you might check out:
> http://www.lpctools.com/
> 

Cool, thanks for the links.

-Denny