Yahoo Groups archive

Lpc2000

Index last updated: 2026-04-28 23:31 UTC

Message

Re: [lpc2000] Re: LPC2148 SPI and SSP behaviour

2006-05-01 by Jan Thogersen

Hi Jan,
> Many options on the SSP, but one I have used several times in a
> similar situation is to trigger an interrupt using SS. You can
> connect the SS signal to an external int pin. Not the most elegant
> and it uses an extra pin, but it seperates the interrupt mechanism
> from the SSP module (up to you to decide if that is a good thing in
> your app.)   Also, if you are generating your SS signal from the LPC
> timers you can use the timer interrupts.
>
Hey,
Thanks!
That was an interesting way of solving it! Now why didn't I think of 
that :-)
I'm just wondering why Phillips didn't make it possible to trap the busy 
flag.
There is plenty of space left in the SSP interrupt flag register. It 
just seems like a feature that
a lot of developers miss.

regards

Attachments

Move to quarantaine

This moves the raw source file on disk only. The archive index is not changed automatically, so you still need to run a manual refresh afterward.