examples: networking support for default example

Adds basic link layer functionality to the default example application.

examples/default/Makefile

@@ -34,6 +34,16 @@ USEMODULE += shell_commands
 USEMODULE += ps
 USEMODULE += config
 
+# Use modules for networking
+# gnrc is a meta module including all required, basic gnrc networking modules
+USEMODULE += gnrc
+# use the default network interface for the board
+USEMODULE += gnrc_netif_default
+# automatically initialize the network interface
+USEMODULE += auto_init_gnrc_netif
+# the application dumps received packets to stdout
+USEMODULE += gnrc_pktdump
+
 FEATURES_OPTIONAL += config
 FEATURES_OPTIONAL += periph_rtc
 

examples/default/main.c

@@ -37,6 +37,11 @@
 #include "ltc4150.h"
 #endif
 
+#ifdef MODULE_NETIF
+#include "net/gnrc/pktdump.h"
+#include "net/gnrc.h"
+#endif
+
 int main(void)
 {
 #ifdef MODULE_LTC4150
@@ -47,6 +52,14 @@ int main(void)
     rtc_init();
 #endif
 
+#ifdef MODULE_NETIF
+    gnrc_netreg_entry_t dump;
+
+    dump.pid = gnrc_pktdump_getpid();
+    dump.demux_ctx = GNRC_NETREG_DEMUX_CTX_ALL;
+    gnrc_netreg_register(GNRC_NETTYPE_UNDEF, &dump);
+#endif
+
     (void) puts("Welcome to RIOT!");
 
     char line_buf[SHELL_DEFAULT_BUFSIZE];