[Gb-ccb] CCB interface questions (fwd)

[Martin Shepherd]

On Thu, 11 Mar 2004, Brian Mason wrote:
>...
> So we will have output like
>
> J1(00) J1(01) J1(10) J1(11) J2(00) ... J16(11)
>
> *always*... with some of the phase bins empty when less than 2 switches
> are active, and all the last J13...J16 bins (16 of them) empty for 3mm.

Agreed.

> You may find it interesting to review
> http://wiki.gb.nrao.edu/bin/view/Projects/KaSoftware

Thanks. I don't think that I have written down how I plan to signal
integration overflows. Rather than have a separate array of overflow
flags, I decided to denote an overflow of a particular integration by
setting the integrated value to 2^32-1, which is the maximum value
that can be held by an unsigned 32-bit integer. In other words,
individual integrations saturate at their maximum values after an
overflow, regardless of whether the overflow was an ADC overflow or an
adder overflow.

Martin