changeset 28:adcb57fd3d75 bbb_network

- added a c script to have the oscillator perform a sine sweep
- added documentation for the network

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/resources/network/network_readme.txt	Sun May 10 13:55:43 2015 +0100
@@ -0,0 +1,24 @@
+Three simple c scripts can be used to test the network, in conjunction with the basic_network project:
+udp-client.c, udp-client-sweep.c,d udp-server.c
+compile them with gcc -o udp-client udp-client.c and similar
+They can be compiled and run from either the host or the bbb
+
+usage
+./udp-client 192.168.7.2 9998 #sends individual messages to the bbb on port 9998
+#enter desired values for frequency (and phase).
+123.0;0;
+
+The parser is currently very stupid, so the format of the message has to be::
+frequencyValue;phaseValue;
+example:
+700.0;0.1;
+
+./udp-client-sweep 192.168.7.2 9998
+sends messages every 1ms to control the frequency of the oscillator, thus generating a sine sweep
+
+./udp-server 9999
+#will print the info received from BeagleRT with the following format
+printf("%8d;%.3f;%.3;",gCounter,gFrequency,gPhase);
+example:
+88201;700.000;0.123;
+

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/resources/network/udp-client-sweep.c	Sun May 10 13:55:43 2015 +0100
@@ -0,0 +1,59 @@
+/* UDP client in the internet domain */
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+
+void error(const char *);
+int main(int argc, char *argv[])
+{
+   int sock, n;
+   unsigned int length;
+   struct sockaddr_in server, from;
+   struct hostent *hp;
+   char buffer[256];
+   
+   if (argc != 3) { printf("Usage: server port\n");
+                    exit(1);
+   }
+
+   server.sin_family = AF_INET;
+   hp = gethostbyname(argv[1]);
+   if (hp==0) error("Unknown host");
+
+   bcopy((char *)hp->h_addr, 
+        (char *)&server.sin_addr,
+         hp->h_length);
+   server.sin_port = htons(atoi(argv[2]));
+   length=sizeof(struct sockaddr_in);
+   while (1){
+     sock= socket(AF_INET, SOCK_DGRAM, 0);
+     if (sock < 0) error("socket");
+     bzero(buffer,256);
+//     printf("Please enter the message: ");
+//     fgets(buffer,255,stdin);
+     double freq=50;
+     while(1){
+       freq*=1.001;
+       if(freq>20000) freq=50;
+       sprintf(buffer,"%.4f;",freq);
+       n=sendto(sock,buffer,
+            strlen(buffer),0,(const struct sockaddr *)&server,length);
+       if (n < 0) error("Sendto");
+       usleep(1000);
+     }
+   }
+   close(sock);
+   return 0;
+}
+
+void error(const char *msg)
+{
+    perror(msg);
+    exit(0);
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/resources/network/udp-client.c	Sun May 10 13:55:43 2015 +0100
@@ -0,0 +1,52 @@
+/* UDP client in the internet domain */
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+
+void error(const char *);
+int main(int argc, char *argv[])
+{
+   int sock, n;
+   unsigned int length;
+   struct sockaddr_in server, from;
+   struct hostent *hp;
+   char buffer[256];
+   
+   if (argc != 3) { printf("Usage: server port\n");
+                    exit(1);
+   }
+
+   server.sin_family = AF_INET;
+   hp = gethostbyname(argv[1]);
+   if (hp==0) error("Unknown host");
+
+   bcopy((char *)hp->h_addr, 
+        (char *)&server.sin_addr,
+         hp->h_length);
+   server.sin_port = htons(atoi(argv[2]));
+   length=sizeof(struct sockaddr_in);
+   while (1){
+     sock= socket(AF_INET, SOCK_DGRAM, 0);
+     if (sock < 0) error("socket");
+     bzero(buffer,256);
+     printf("Please enter the message: ");
+     fgets(buffer,255,stdin);
+     n=sendto(sock,buffer,
+            strlen(buffer),0,(const struct sockaddr *)&server,length);
+     if (n < 0) error("Sendto");
+   }
+   close(sock);
+   return 0;
+}
+
+void error(const char *msg)
+{
+    perror(msg);
+    exit(0);
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/resources/network/udp-server.c	Sun May 10 13:55:43 2015 +0100
@@ -0,0 +1,54 @@
+/* Creates a datagram server.  The port 
+   number is passed as an argument.  This
+   server runs forever */
+
+#include <sys/types.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <string.h>
+#include <netdb.h>
+#include <stdio.h>
+
+void error(const char *msg)
+{
+    perror(msg);
+    exit(0);
+}
+
+int main(int argc, char *argv[])
+{
+   int sock, length, n;
+   socklen_t fromlen;
+   struct sockaddr_in server;
+   struct sockaddr_in from;
+   char buf[1024];
+
+   if (argc < 2) {
+      fprintf(stderr, "ERROR, no port provided\n");
+      exit(0);
+   }
+   
+   sock=socket(AF_INET, SOCK_DGRAM, 0);
+   if (sock < 0) error("Opening socket");
+   length = sizeof(server);
+   bzero(&server,length);
+   server.sin_family=AF_INET;
+   server.sin_addr.s_addr=INADDR_ANY;
+   server.sin_port=htons(atoi(argv[1]));
+   if (bind(sock,(struct sockaddr *)&server,length)<0) 
+       error("binding");
+   fromlen = sizeof(struct sockaddr_in);
+   while (1) {
+       n = recvfrom(sock,buf,1024,0,(struct sockaddr *)&from,&fromlen);
+       if (n < 0) error("recvfrom");
+       write(1,"Received a datagram: ",21);
+       write(1,buf,n);
+       n = sendto(sock,"Got your message\n",17,
+                  0,(struct sockaddr *)&from,fromlen);
+       if (n  < 0) error("sendto");
+   }
+   return 0;
+ }
+

--- a/resources/udp-client.c	Sun May 10 02:01:45 2015 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,52 +0,0 @@
-/* UDP client in the internet domain */
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-#include <netdb.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <string.h>
-
-void error(const char *);
-int main(int argc, char *argv[])
-{
-   int sock, n;
-   unsigned int length;
-   struct sockaddr_in server, from;
-   struct hostent *hp;
-   char buffer[256];
-   
-   if (argc != 3) { printf("Usage: server port\n");
-                    exit(1);
-   }
-
-   server.sin_family = AF_INET;
-   hp = gethostbyname(argv[1]);
-   if (hp==0) error("Unknown host");
-
-   bcopy((char *)hp->h_addr, 
-        (char *)&server.sin_addr,
-         hp->h_length);
-   server.sin_port = htons(atoi(argv[2]));
-   length=sizeof(struct sockaddr_in);
-   while (1){
-     sock= socket(AF_INET, SOCK_DGRAM, 0);
-     if (sock < 0) error("socket");
-     bzero(buffer,256);
-     printf("Please enter the message: ");
-     fgets(buffer,255,stdin);
-     n=sendto(sock,buffer,
-            strlen(buffer),0,(const struct sockaddr *)&server,length);
-     if (n < 0) error("Sendto");
-   }
-   close(sock);
-   return 0;
-}
-
-void error(const char *msg)
-{
-    perror(msg);
-    exit(0);
-}

--- a/resources/udp-server.c	Sun May 10 02:01:45 2015 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,54 +0,0 @@
-/* Creates a datagram server.  The port 
-   number is passed as an argument.  This
-   server runs forever */
-
-#include <sys/types.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <string.h>
-#include <netdb.h>
-#include <stdio.h>
-
-void error(const char *msg)
-{
-    perror(msg);
-    exit(0);
-}
-
-int main(int argc, char *argv[])
-{
-   int sock, length, n;
-   socklen_t fromlen;
-   struct sockaddr_in server;
-   struct sockaddr_in from;
-   char buf[1024];
-
-   if (argc < 2) {
-      fprintf(stderr, "ERROR, no port provided\n");
-      exit(0);
-   }
-   
-   sock=socket(AF_INET, SOCK_DGRAM, 0);
-   if (sock < 0) error("Opening socket");
-   length = sizeof(server);
-   bzero(&server,length);
-   server.sin_family=AF_INET;
-   server.sin_addr.s_addr=INADDR_ANY;
-   server.sin_port=htons(atoi(argv[1]));
-   if (bind(sock,(struct sockaddr *)&server,length)<0) 
-       error("binding");
-   fromlen = sizeof(struct sockaddr_in);
-   while (1) {
-       n = recvfrom(sock,buf,1024,0,(struct sockaddr *)&from,&fromlen);
-       if (n < 0) error("recvfrom");
-       write(1,"Received a datagram: ",21);
-       write(1,buf,n);
-       n = sendto(sock,"Got your message\n",17,
-                  0,(struct sockaddr *)&from,fromlen);
-       if (n  < 0) error("sendto");
-   }
-   return 0;
- }
-