--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ad9956.c	Mon Mar 31 17:03:38 2014 +0200
@@ -0,0 +1,151 @@
+#ifdef _CVI_
+#include <winsock2.h>
+#include <ansi_c.h>
+#include <toolbox.h>
+#else
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <ctype.h>
+#include <stdarg.h>
+#endif
+
+#include "dds.h"
+#include "ad9956.h"
+
+
+int ad9956_init(struct ad9956 *d, const char *hostname, double clock)
+{
+	int sock, n, r;
+	char buffer[256];
+	struct sockaddr_in addr;
+	struct hostent* host;	
+
+#ifdef _CVI_
+	WSADATA wsdata;
+	WSAStartup(MAKEWORD(2,2), &wsdata);	
+#endif
+	
+	d->hostname = strdup(hostname);
+	d->port = 1234;
+	d->profile = 0;
+	d->clock = clock;
+
+	host = gethostbyname(hostname);
+	if (host == NULL)
+		return -1;
+  
+	sock = socket(AF_INET, SOCK_STREAM, 0);
+	if (sock < 0)
+		return -2;
+
+	addr.sin_family = host->h_addrtype;
+	memcpy(&addr.sin_addr.s_addr, host->h_addr_list[0], host->h_length);
+	addr.sin_port = htons(d->port);
+
+	r = connect(sock, (struct sockaddr*)&addr, sizeof(addr));
+	if (r < 0)
+		return -3;
+
+	d->fd = sock;
+
+	/* check compatibility */
+	n = snprintf(buffer, sizeof(buffer), "REVISION");
+	r = msend(d->fd, buffer, n);
+	if (r < 0)
+		return r;
+	r = mrecv(d->fd, buffer, sizeof(buffer));
+	if (r < 0)
+		return r;
+	if (atoi(buffer) != REVISION)
+		return -EINVAL;
+
+	return 0;
+}
+
+
+int ad9956_set_frequency(struct ad9956 *d, double f)
+{
+	int r;
+	uint64 value = ftw(d->clock, f);
+
+	r = command(d->fd, "SET PCR%d 0x%llX", d->profile, value);
+	if (r < 0)
+		return r;
+
+	d->frequency = freq(d->clock, value);
+     
+	return 0;
+}
+
+
+int ad9956_get_frequency(struct ad9956 *d, double *f)
+{
+	int r, n;
+	uint64 value;
+	char buffer[256];
+
+	n = snprintf(buffer, sizeof(buffer), "GET PCR%d", d->profile);
+
+	r = msend(d->fd, buffer, n);
+	if (r < 0)
+		return r;
+
+	r = mrecv(d->fd, buffer, sizeof(buffer));
+	if (r < 0)
+		return r;
+
+	r = strtouint64(buffer, &value);
+	if (r < 0)
+		return r;
+
+	d->frequency = freq(d->clock, value);
+	if (f)
+		*f = d->frequency;
+
+	return 0;
+}
+     
+
+int ad9956_set_sweep_rate(struct ad9956 *d, double rate)
+{
+	int r;
+	uint64 value = ftw(d->clock, rate);
+	
+	r = command(d->fd, "SWEEP SET DFTW %lld", d->profile, value);
+	if (r < 0)
+		return r;
+
+	return 0;
+}
+
+
+int ad9956_sweep_start(struct ad9956 *d)
+{
+	int r;
+
+	r = command(d->fd, "SWEEP START");
+	if (r < 0)
+		return r;
+
+	return 0;
+}
+
+
+int ad9956_sweep_stop(struct ad9956 *d)
+{
+	int r;
+
+	r = command(d->fd, "SWEEP STOP");
+	if (r < 0)
+		return r;
+
+	return 0;
+}