diff options
Diffstat (limited to 'libvxi11client/perlbits')
| -rw-r--r-- | libvxi11client/perlbits/Client.pm | 109 |
1 files changed, 108 insertions, 1 deletions
diff --git a/libvxi11client/perlbits/Client.pm b/libvxi11client/perlbits/Client.pm index 6e3d257..39020a2 100644 --- a/libvxi11client/perlbits/Client.pm +++ b/libvxi11client/perlbits/Client.pm @@ -202,7 +202,7 @@ VXI11::Client - Perl extension for interfacing with VXI-11 networked instruments my ($bytes, $buff, $reason) = $instr->vxi_read(); print "got " . $bytes . ";" . $buff . " reason " . $reason ."\n"; - my ($error, $statusbyte) = $instr->vxi_readstatusbyte(0); + my ($error, $statusbyte) = $instr->vxi_readstatusbyte(); printf "status byte is " . $statusbyte . "\n"; $instr->vxi_create_intr_chan(); @@ -222,6 +222,113 @@ VXI11::Client - Perl extension for interfacing with VXI-11 networked instruments vxi_stopinterruptserver(); +=head1 SAMPLE SCRIPT + + #!/usr/bin/perl + + use strict; + use warnings; + use VXI11::Client; + + # This script tests communications to, and service requests from, + # an Avtech Electrosystems pulse generator (or any other instrument + # that accepts the "freq" command). + + my $ip_addr = "192.168.0.62"; # IP address of the instrument, + # or VXI-to-GPIB gateway device. + my $device = 0; # Only revelant if a VXI-to-GPIB + # gateway is used. + + vxi_startinterruptserver(); # Launch a server to handle + # interrupts from the instrument. + my $my_interrupt_handle = "Avtech"; # Each interrupt source needs a name. + + my $instr = vxi_open( address => $ip_addr, device => $device ); + + if ( $instr->vxi_lock() > 0 ) { + print "Instrument is locked for our use.\n"; + + $instr->vxi_remote(); # Lock out the front panel (optional) + + $instr->vxi_clear(); # Reset the device interface. + $instr->vxi_write("*rst"); # Load default settings. + $instr->vxi_write("*cls"); # Clear the error queue. + + $instr->vxi_write("*idn?"); + my ( $bytes, $idn, $reason ) = $instr->vxi_read(); + printf "Name of device: $idn\n"; + + $instr->vxi_write("*ese 60"); # Flag command-related errors. + $instr->vxi_write("*sre 32"); # Request service on those errors. + $instr->vxi_create_intr_chan(); # Create interrupt channel. + $instr->vxi_enable_srq($my_interrupt_handle); + # Enable service requests on the + # interrupt channel + } + else { + die "We could not obtain a lock.\n"; + } + + # Generate a list of test frequencies + my @list; + foreach my $suffix ( "Hz", "kHz", "MHz" ) { + foreach my $step ( 1, 10, 100 ) { + foreach my $base ( 1, 2, 5 ) { + my $freq = ( $base * $step ) . " " . $suffix; + push @list, $freq; + } + } + } + + # Go up the list, then down again, to ensure that the + # error system resets properly. + push @list, reverse(@list); + + # Execute each frequency and see if any errors occur. + foreach my $freq (@list) { + + print "\nTrying $freq.\n"; + $instr->vxi_write("freq $freq"); + + # You could just call "syst:err?" to check for errors after + # each freq command, eliminating the need for the interrupt channel. + # That's up to you! + + # Was an interrupt fired within the default wait period of 250 ms? + my $handle; + if ( ( $handle = vxi_wait_for_interrupt() ) + && ( $handle eq $my_interrupt_handle ) ) + { + my ( $error, $statusbyte ) = $instr->vxi_readstatusbyte(); + printf( "Status byte: 0x%x\n", $statusbyte ); + + my $response = ""; + until ( $response =~ /No error/i ) { + $instr->vxi_write("syst:err?"); + ( my $bytes, $response, my $reason ) = $instr->vxi_read(); + if ( $response !~ /No error/i ) { + print "Error message: $response\n"; + } + } + + # clear the error reporting bits + $instr->vxi_write("*cls"); + } + } + + # These functions are also available, but aren't especially useful + # with the Avtech Electrosystems pulse generator. + $instr->vxi_abort(); + $instr->vxi_trigger(); + + # Tidy up! + $instr->vxi_disable_srq(); + $instr->vxi_destroy_intr_chan(); + $instr->vxi_unlock(); + $instr->vxi_local(); + $instr->vxi_close(); + + =head1 DESCRIPTION A client for VXI-11 networked instruments. To start talking to an instrument |