int main(int argc,char **argv)
{
int MySocket,MyControlPort;
char SocketsBuffer[SOCKETS_BUFFER_SIZE];
struct sockaddr_in MyAddress,MyControlAddress;
unsigned int ControlPort;
int status;
int retval;
// Create socket (allocate resources)
if((MySocket=socket(
PF_INET, // IPv4
SOCK_STREAM, // TCP
0))==-1) {
printf("Error: Unable to create socket (%i)...\n",errno);
perror("sockets"); // Print error message based on errno
exit(1);
}
// Establish TCP connection
memset(&MyAddress,0,sizeof(struct sockaddr_in)); // Set structure to zero
MyAddress.sin_family=PF_INET; // IPv4
MyAddress.sin_port=htons(SOCKETS_PORT); // Port number (in network order)
MyAddress.sin_addr.s_addr=
inet_addr(SOCKETS_IP_ADDRESS); // IP address (in network order)
if(connect(MySocket,(struct sockaddr *)&MyAddress,
sizeof(struct sockaddr_in))==-1) {
printf("Error: Unable to establish connection to socket (%i)...\n",
errno);
perror("sockets"); // Print error message based on errno
exit(1);
}
// Minimize latency by setting TCP_NODELAY option
SetNODELAY(MySocket);
// Clear status and reset instrument
//WriteString(MySocket,"*CLS;*RST\n");
// Get instrument's ID string
WriteString(MySocket,"*IDN?\n");
ReadString(MySocket,SocketsBuffer);
printf("Instrument ID: %s\n",SocketsBuffer);
SocketMainClose:
// Close main port
if(close(MySocket)==-1) {
printf("Error: Unable to close socket (%i)...\n",errno);
perror("sockets"); // Print error message based on errno
retval=1;;
}
exit(retval);
}
int main(int argc,char **argv)
{
int MySocket,MyControlPort;
char SocketsBuffer[SOCKETS_BUFFER_SIZE];
struct sockaddr_in MyAddress,MyControlAddress;
unsigned int ControlPort;
int status;
int retval;
// Create socket (allocate resources)
if((MySocket=socket(
PF_INET, // IPv4
SOCK_STREAM, // TCP
0))==-1) {
printf("Error: Unable to create socket (%i)...\n",errno);
perror("sockets"); // Print error message based on errno
exit(1);
}
// Establish TCP connection
memset(&MyAddress,0,sizeof(struct sockaddr_in)); // Set structure to zero
MyAddress.sin_family=PF_INET; // IPv4
MyAddress.sin_port=htons(SOCKETS_PORT); // Port number (in network order)
MyAddress.sin_addr.s_addr=
inet_addr(SOCKETS_IP_ADDRESS); // IP address (in network order)
if(connect(MySocket,(struct sockaddr *)&MyAddress,
sizeof(struct sockaddr_in))==-1) {
printf("Error: Unable to establish connection to socket (%i)...\n",
errno);
perror("sockets"); // Print error message based on errno
exit(1);
}
// Minimize latency by setting TCP_NODELAY option
SetNODELAY(MySocket);
// Clear status and reset instrument
WriteString(MySocket,"*CLS;*RST\n");
// Get instrument's ID string
WriteString(MySocket,"*IDN?\n");
ReadString(MySocket,SocketsBuffer);
printf("Instrument ID: %s\n",SocketsBuffer);
// Ask for control port
WriteString(MySocket,"SYST:COMM:TCPIP:CONTROL?\n");
if(ReadString(MySocket,SocketsBuffer)==0)
{
printf("Warning: No response from instrument (control port).\n");
retval=0;
goto SocketMainClose;
}
sscanf(SocketsBuffer,"%u",&ControlPort);
printf("Control Port: %u\n",ControlPort);
// Create socket for control port
if((MyControlPort=socket(PF_INET,SOCK_STREAM,0))==-1)
{
printf("Error: Unable to create control port socket (%i)...\n",errno);
perror("sockets"); // Print error message based on errno
retval=1;
goto SocketMainClose;
}
// Establish TCP connection to control port
memset(&MyControlAddress,0,
sizeof(struct sockaddr_in)); // Set structure to zero
MyControlAddress.sin_family=PF_INET; // IPv4
MyControlAddress.sin_port=
htons(ControlPort); // Port number (in network order)
MyControlAddress.sin_addr.s_addr=
inet_addr(SOCKETS_IP_ADDRESS); // IP address (in network order)
if(connect(MyControlPort,(struct sockaddr *)&MyControlAddress,
sizeof(struct sockaddr_in))==-1) {
printf(
"Error: Unable to establish connection to control port (%i)...\n",
errno);
perror("sockets"); // Print error message based on errno
retval=1;
goto SocketMainClose;
}
// Do a device clear
DeviceClear(MyControlPort,SocketsBuffer);
// Demonstrate SRQ... First, tell the instrument when to generate an SRQ
// NOTE: The following commands are dependant of the instrument
// This example is for the Agilent L4410A, L4411A,34410A or 34411A
WriteString(MySocket,
"*ESE 1\n"); // Operation Complete causes Standard Event
WriteString(MySocket,
"*SRE 32\n"); // Standard Event causes SRQ
// Now perform some operation(s) and raise SRQ when done
WriteString(MySocket,"CONF:FREQ\n"); // Go to frequency measurement mode
WriteString(MySocket,"*OPC\n"); // Tell us when you're ready!
// Now wait until data becomes available on the control link
if(WaitForData(MyControlPort)==0)
{
printf("Warning: Instrument did not generate SRQ.\n");
retval=0;
goto SocketClose;
}
// Data available... Read and interpret!
ReadString(MyControlPort,SocketsBuffer);
printf("Data read on control port: %s\n",SocketsBuffer);
if(strncmp(SocketsBuffer,"SRQ",3)!=0) {
printf("Warning: Didn't receive an SRQ!\n");
retval=0;
goto SocketClose;
}
sscanf(SocketsBuffer,"SRQ%i",&status);
printf("Status is: %d",status);
SocketClose:
// Close control port
if(close(MyControlPort)==-1) {
printf("Error: Unable to close control port socket (%i)...\n",errno);
perror("sockets"); // Print error message based on errno
retval=1;
}
SocketMainClose:
// Close main port
if(close(MySocket)==-1) {
printf("Error: Unable to close socket (%i)...\n",errno);
perror("sockets"); // Print error message based on errno
retval=1;;
}
exit(retval);
}