On Wed, Dec 30, 2015 at 11:15 AM, <[email protected]> wrote:
> I wrote a block that writes the rx_time tag and another block that reads
> it. After reading them for a 20 to thirty calls to the work function, it
> stops getting any. The amount it reads varies from run to run. Any ideas?
> This code snippet is from the work function my block that writes the tag.
> The cerr statement continues to print to the console until I stop execution.
>
> <code>
> VITA49_packet_info packet_info = p_packet->get_VITA49_packet_info();
> if (m_do_send_tags)
> {
> double timestamp_in_seconds =
> static_cast<double>(p_packet->get_integer_seconds()) +
> static_cast<double>(p_packet->get_fraction_seconds()) * 1e-12;
> const pmt::pmt_t timestamp = pmt::make_tuple(
> pmt::from_uint64(static_cast<long
> long>(floor(timestamp_in_seconds))),
> pmt::from_double(timestamp_in_seconds -
> floor(timestamp_in_seconds)));
> std::cerr << "SEND (" << d_id << ") "
> << " tag_offset=" << m_tag_offset
> << std::setprecision(std::numeric_limits<double>::digits10
> + 1)
> << " timesamp_in_seconds=" << timestamp_in_seconds <<
> std::endl;
> add_item_tag(0, m_tag_offset, TIME_KEY, timestamp, d_id);
> </code>
>
How are you setting m_tag_offset?
> This code snippet is from my work function in the block that reads the
> tag. The cerr statement stops printing after twenty to thirty times
> suggesting that it no longer sees the time tags. The rest of the work
> function continues to operate properly.
>
> <code>
> static const pmt::pmt_t TIME_KEY = pmt::string_to_symbol("rx_time");
> std::vector<tag_t> tags;
> get_tags_in_range(
> tags, 0, nitems_read(0), nitems_read(0) + noutput_items);
> std::vector<tag_t>::iterator itr;
> size_t j = 0;
> for (itr = tags.begin(); itr != tags.end(); itr++, j++)
> {
> if (pmt::eq((*itr).key, TIME_KEY))
> {
> d_real_time_seconds =
> static_cast<double>(pmt::to_uint64(pmt::tuple_ref((*itr).value,
> 0))) +
> static_cast<double>(pmt::to_double(pmt::tuple_ref((*itr).value,
> 1)));
> std::cerr << "RECEIVE (" << d_id << ") " << j
> << " tag_offset=" << (*itr).offset
> << " noutput_items=" << noutput_items
> << std::setprecision(std::numeric_limits<double>::digits10
> + 1)
> << " time_seconds=" << d_real_time_seconds << std::endl;
> }
> }
> }
> <code>
>
> /\/\ark.
>
What does your flowgraph look like? Or is it just the tag producing block
going straight in to the tag getter block?
Tom
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