SPI interface 56F8367

Charlie — Fri, 25 Jul 2008 03:05:50 GMT

I am using both the SPI interfaces. One is for writing to a serial DAC and another is for interprocessor communications.

I have the DAC SPI interface running fine, however, I cannot get the other one to work.

I mimic the status and control register, the data size and the interrupt (respective) registers. I have stopped the unit and looked at the registers (the 4 for the SPI interface and the two IPRs) and they are exactly the same. I know I am getting to the code I need to get to through breakpoints. I access the units in the same exact way. Yet, only one works, and I have tried two different boards.

I just don't get it.

Any ideas? Is there something about the SPI interface that I am missing? Or, I guess, that I got right on one and forgot about on the other?

Re: SPI interface 56F8367

Pedro_ — Tue, 05 Aug 2008 16:09:35 GMT

I haven't worked with this processor but I've seen a problem like this before.

Have you scoped the Chip Select line of the interprocessor comms?

Make sure there's no significant noise in it.

Regards

Other NXP ProductsのトピックRe: SPI interface 56F8367

SPI interface 56F8367

Re: SPI interface 56F8367