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//
// Copyright 2014-2015 Ettus Research LLC
// Copyright 2018 Ettus Research, a National Instruments Company
//
// SPDX-License-Identifier: GPL-3.0-or-later
//
#include <uhd/rfnoc/tick_node_ctrl.hpp>
using namespace uhd::rfnoc;
const double tick_node_ctrl::RATE_UNDEFINED = 0;
double tick_node_ctrl::get_tick_rate(
const std::set<node_ctrl_base::sptr>& _explored_nodes)
{
// First, see if we've implemented _get_tick_rate()
{
double my_tick_rate = _get_tick_rate();
if (my_tick_rate != RATE_UNDEFINED) {
return my_tick_rate;
}
}
// If not, we ask all our neighbours for the tick rate.
// This will fail if we get different values.
std::set<node_ctrl_base::sptr> explored_nodes(_explored_nodes);
explored_nodes.insert(shared_from_this());
// Here, we need all up- and downstream nodes. Note that we have the rule
// that there can only be one tick rate in all of the nodes, that means we
// don't only search active neighbouring nodes.
std::vector<sptr> neighbouring_tick_nodes =
find_downstream_node<tick_node_ctrl>(false);
{
std::vector<sptr> upstream_neighbouring_tick_nodes =
find_upstream_node<tick_node_ctrl>(false);
neighbouring_tick_nodes.insert(neighbouring_tick_nodes.end(),
upstream_neighbouring_tick_nodes.begin(),
upstream_neighbouring_tick_nodes.end());
} // neighbouring_tick_nodes is now initialized
double ret_val = RATE_UNDEFINED;
for (const sptr& node : neighbouring_tick_nodes) {
if (_explored_nodes.count(node)) {
continue;
}
double tick_rate = node->get_tick_rate(explored_nodes);
if (tick_rate == RATE_UNDEFINED) {
continue;
}
if (ret_val == RATE_UNDEFINED) {
ret_val = tick_rate;
// TODO: Remember name of this node so we can make the throw message more
// descriptive.
continue;
}
if (tick_rate != ret_val) {
throw uhd::runtime_error(str(
// TODO add node names
boost::format("Conflicting tick rates: One neighbouring block specifies "
"%d MHz, another %d MHz.")
% tick_rate % ret_val));
}
}
return ret_val;
}
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