bool CGPIBDevice::Open(int nBUS, int nAddr, int nSecAddr)
{
if(m_hGPIBDLL == NULL && !LoadGPIBDriver())
{
return false;
}
m_nDev = ibdev(nBUS, nAddr, nSecAddr, 13, 1, 0);
if (m_nDev < 0 || (ibsta & ERR))
{
Log(CCommon::FormatString(_T("Failed to open GPIB device at GPIB::%d::%d::%d!"), nBUS, nAddr, nSecAddr));
return false;
}
short n = 0;
ibln(m_nDev, nAddr, 0, &n);
if (n <= 0 || (ibsta & ERR))
{
Log(_T("No GPIB listener!"));
return false;
}
else
{
Log(_T("GPIB device opened!"));
ibclr(m_nDev);
return true;
}
}
int wxGPIB::OpenDevice(const char* devname, void* dcs)
{
// if dcs isn't NULL, type cast
if(dcs) m_dcs = *(wxGPIB_DCS*)dcs;
if(strncmp(devname,"gpib1",5) == 0) m_board = 0;
else if(strncmp(devname,"gpib2",5) == 0) m_board = 1;
if(m_board < 0) {
return -1;
}
// check for a valid timeout
if((unsigned int)m_dcs.m_timeout > wxGPIB_TO_1000s) {
m_dcs.m_timeout = wxGPIB_TO_10us;
}
m_hd = ibdev(m_board,
m_dcs.m_address1,
m_dcs.m_address2,
m_dcs.m_timeout,
m_dcs.m_eot,
#ifdef __GNUG__
// FIXME!
// linux-gpib-3.2.08 doesn't work with any EOS (blocks).
// Because we always has to add an EOS on the message
// (independent of the m_eosChar setting), we can ignore it!
0
#else
(m_dcs.m_eosMode << 8) | m_dcs.m_eosChar
#endif
);
if(m_hd < 0) {
// no gpib controller installed (not found)
return -2;
}
// test for a connected listener (device with given address)
short int listen = 0;
ibln(m_board,m_dcs.m_address1,NO_SAD,&listen);
if(!listen) {
// no listener at the given address
CloseDevice();
return -3;
}
// reset device
ibclr(m_hd);
// save state, error and count
m_state = ThreadIbsta();
m_count = ThreadIbcnt();
m_error = ThreadIberr();
// no error
return 0;
};