On Sun, Feb 25, 2007 at 08:53:51PM -0500, Brian Padalino wrote: > On 2/25/07, Eric Blossom <[EMAIL PROTECTED]> 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?
I guess I'm concerned that some of the OPS could take more than a single tick. E.g., I2C or SPI ops. Thoses buses run at something like 100kHz to 400kHz. If all execution delays are known, then OP_DELAY seems fine (and easy). Eric _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
