Re: [Discuss-gnuradio] updated packet format on USRP inband signaling

[Brian Padalino]

On 2/25/07, Eric Blossom <address@hidden> wrote:
> That sounds good.  Would you interpret it as a delta-t from the
> timestamp in the header?  I'm thinking about the case where there are
> multiple DELAY ops in the payload.

It would probably be best to interpret it as a delta from the current
time tick where each operation would be 1 tick.

If you did it as a delta from the timestamp header, you would have to
calculate those intermediate deltas - and 32-bit subtractors inside an
FPGA can run pretty slowly even with the fast carry chains.

Something like:
 OP_WRITE_REG
 OP_DELAY[19]
 OP_I2C_WRITE

I could see this showing OP_I2C_WRITE occuring 20 ticks after OP_WRITE_REG.

What do you think?

> Eric

Brian