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Re: [lpc2000] Re: Multi-byte SPI transfers in slave mode (21-bitsactually)

2005-11-21 by Richard Duits

Hi David,

I would use the LPC2119/2129 and a 32 or 64 macrocell CPLD to create a 
shift register. This is much easier than interfacing with an external 
CAN controller, and it would create a much better upgrade path to a 
newer LPC2xxx that has both CAN and SSP when it becomes available.

Richard Duits.



David Hawkins wrote:

> Joel Winarske wrote:
> >>Do any of the other LPC parts use double buffers on
> >>their SPI transmit ports?
> >
> > I haven't followed this completely, but the SSP port has a FIFO.
>
> Ahhh, good-point. The LPC2129 doesn't have SSP though.
>
> I was kind of looking for a device with CAN too, since
> a lot of the new equipment here at the observatory is
> controlled via CAN.
>
> The User Manual I was looking at is for
>
>    LPC2119/2129/2194/2292/2294
>
> which I believe covers all the CAN-capable devices, and none
> of these have SSP, so I would need to add an external CAN
> controller.
>
> So, anyone had experience with an external Philips CAN
> controller connected to say an LPC2138?
>
> (Isn't the CAN core used in the LPCs is a Philips part that
> comes standalone - SJ??? comes to mind). It would need to
> be SPI or I2C controlled (unless I went with an LPC with
> EMI).
>
> Dave
>
>
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