Re: [Discuss-gnuradio] getting the fpga counter for timestamping

2013-05-09 Thread Marcus D. Leech
The FPGA interprets the timestamps and waits until the exact moment specified by the time to transmit. The timestamps specify an absolute time on the device I would like to know what is the mechanism the FPGA is using to interpret the timestamps. You are supposing there is two time references: th

Re: [Discuss-gnuradio] getting the fpga counter for timestamping

2013-05-09 Thread NaceurElOuni
> The FPGA interprets the timestamps and waits > until the exact moment specified by the time to transmit. > The timestamps specify an absolute time on the device I would like to know what is the mechanism the FPGA is using to interpret the timestamps. You are supposing there is two time referenc

Re: [Discuss-gnuradio] getting the fpga counter for timestamping

2013-05-07 Thread Josh Blum
On 05/07/2013 04:59 PM, NaceurElOuni wrote: > Thank you josh, > > I just want to be sure, are stream tags handled by timing of the FPGA (clock > ticks) or the timestamps are being inserted from within the host userspace, > because am getting too much variability on the latency when timestamps a

Re: [Discuss-gnuradio] getting the fpga counter for timestamping

2013-05-07 Thread NaceurElOuni
Thank you josh, I just want to be sure, are stream tags handled by timing of the FPGA (clock ticks) or the timestamps are being inserted from within the host userspace, because am getting too much variability on the latency when timestamps are inserted in the OS. regards. -- View this message

Re: [Discuss-gnuradio] getting the fpga counter for timestamping

2013-05-07 Thread Josh Blum
On 05/07/2013 03:43 PM, NaceurElOuni wrote: > Hi, > > I need to know if there is a way to retrieve a counter-like value from the > FPGA to timestamp the moment I sent a packet. > More precisely, I am sending a stream of packets from the host to radio, to > be sent to another radio in the Rx sid

[Discuss-gnuradio] getting the fpga counter for timestamping

2013-05-07 Thread NaceurElOuni
Hi, I need to know if there is a way to retrieve a counter-like value from the FPGA to timestamp the moment I sent a packet. More precisely, I am sending a stream of packets from the host to radio, to be sent to another radio in the Rx side. Any clarifications are welcome, Regards, -- View th