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//
// Copyright 2014-2015 Ettus Research LLC
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
#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
std::vector< sptr > neighbouring_tick_nodes = find_downstream_node<tick_node_ctrl>(true);
{
std::vector< sptr > upstream_neighbouring_tick_nodes = find_upstream_node<tick_node_ctrl>(true);
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;
BOOST_FOREACH(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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