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/***************************************************************************** |
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* |
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* This file is part of the ecapp library (EtherCAT application devices). |
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* |
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* Copyright (C) 2026 Florian Pose <fp@igh.de> |
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* |
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* The ecapp library is free software: you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public License |
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* as published by the Free Software Foundation, version 3 of the |
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* License. |
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* |
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* The ecapp library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with the ecapp library. If not, see |
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* <https://www.gnu.org/licenses/>. |
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* |
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****************************************************************************/ |
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#ifndef ECAPP_CONFIGURABLECHANNELCOUNT_H |
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#define ECAPP_CONFIGURABLECHANNELCOUNT_H |
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/****************************************************************************/ |
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#include "ecapp/Capability.h" |
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#include "ecapp_export.h" |
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/****************************************************************************/ |
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namespace EcApp { |
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/** Capability for a device whose channel count is not fixed by its |
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* type -- e.g. a modular valve terminal (see Festo) whose PDO layout |
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* reserves a fixed number of bits, but where how many of them an |
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* installation actually uses varies by how many valve modules are |
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* physically attached. Not every SubDevice implements this -- use |
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* EcApp::capability<ConfigurableChannelCount>(device), which throws |
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* UnsupportedCapability for a device with a fixed channel count. |
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* |
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* Unlike IoLinkMaster::setPortDevice()/applyPortConfig(), there is |
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* nothing here to aggregate across several independent calls before a |
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* combined PDO/SDO push -- the channel count doesn't change the |
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* slave's PDO structure (a fixed number of bits is always reserved), |
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* only how many of them this device exposes as channels. One call |
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* does everything: outputKinds() reflects the new count immediately |
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* afterwards. Still call it once, before the master is activated, |
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* like any other one-time device setup. */ |
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class ECAPP_EXPORT ConfigurableChannelCount |
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{ |
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public: |
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virtual ~ConfigurableChannelCount() = default; |
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virtual void setChannelCount(unsigned int count) = 0; |
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}; |
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} // namespace EcApp |
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#endif // ECAPP_CONFIGURABLECHANNELCOUNT_H |
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/****************************************************************************/ |
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