mirror of
https://github.com/f4exb/sdrangel.git
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137 lines
3.9 KiB
C++
137 lines
3.9 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2021 Jon Beniston, M7RCE //
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// //
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// This program is free software; you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation as version 3 of the License, or //
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// (at your option) any later version. //
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// //
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// This program 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 //
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// GNU General Public License V3 for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with this program. If not, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////
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#include <QDebug>
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#include "visa.h"
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#ifdef _MSC_VER
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#include <windows.h>
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#else
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#include <dlfcn.h>
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#endif
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VISA::VISA() :
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m_defaultRM(0),
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viOpenDefaultRM(nullptr),
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viOpen(nullptr),
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viClose(nullptr),
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viPrintf(nullptr),
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viScanf(nullptr),
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m_available(false)
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{
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#ifdef _MSC_VER
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const char *visaName = "visa32.dll"; // Loads visa64.dll on WIN64
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#else
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const char *visaName = "libktvisa32.so"; // Keysight library
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#endif
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visaLibrary = libraryOpen(visaName);
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if (visaLibrary)
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{
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viOpenDefaultRM = (ViStatus (*)(ViPSession)) libraryFunc(visaLibrary, "viOpenDefaultRM");
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viOpen = (ViStatus (*)(ViSession sesn, ViRsrc name, ViAccessMode mode, ViUInt32 timeout, ViPSession vi)) libraryFunc(visaLibrary, "viOpen");
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viClose = (ViStatus (*)(ViObject vi)) libraryFunc(visaLibrary, "viClose");
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viPrintf = (ViStatus (*) (ViSession vi, ViString writeFmt, ...)) libraryFunc(visaLibrary, "viPrintf");
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viScanf = (ViStatus (*) (ViSession vi, ViString writeFmt, ...)) libraryFunc(visaLibrary, "viScanf");
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if (viOpenDefaultRM && viOpen && viClose && viPrintf) {
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m_available = true;
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}
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}
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else
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{
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qDebug() << "VISA::VISA: Unable to load " << visaName;
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}
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}
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ViSession VISA::openDefault()
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{
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if (isAvailable() && (m_defaultRM == 0))
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{
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viOpenDefaultRM(&m_defaultRM);
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return m_defaultRM;
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}
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else
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{
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return m_defaultRM;
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}
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}
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void VISA::closeDefault()
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{
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if (isAvailable())
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{
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viClose(m_defaultRM);
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m_defaultRM = 0;
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}
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}
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ViSession VISA::open(const QString& device)
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{
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ViSession session;
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if (isAvailable())
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{
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if (VI_SUCCESS == viOpen(m_defaultRM, device.toLatin1().data(), VI_NULL, VI_NULL, &session))
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{
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qDebug() << "VISA::open: Opened VISA device: " << device;
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return session;
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}
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else
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{
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qDebug() << "VISA::open: Failed to open VISA device: " << device;
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}
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}
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return 0;
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}
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void VISA::close(ViSession session)
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{
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if (isAvailable()) {
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viClose(session);
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}
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}
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#ifdef _MSC_VER
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void *VISA::libraryOpen(const char *filename)
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{
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HMODULE module;
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module = LoadLibrary ((LPCSTR)filename);
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return module;
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}
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void *VISA::libraryFunc(void *library, const char *function)
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{
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return GetProcAddress ((HMODULE)library, function);
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}
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#else
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void *VISA::libraryOpen(const char *filename)
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{
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return dlopen (filename, RTLD_LAZY);
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}
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void *VISA::libraryFunc(void *library, const char *function)
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{
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return dlsym (library, function);
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}
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#endif
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