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lib/amb1_sdk/common/example/bcast/readme.txt

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+LWIP BROADCAST EXAMPLE
+
+Description:
+Listen broadcast message on port 49152.
+Send packet with the content of received packet to broadcast address.
+
+Configuration:
+[lwipopts.h]
+    #define LWIP_UDP     1
+[platform_opts.h]
+    #define CONFIG_EXAMPLE_BCAST    1
+	
+Execution:
+Can make automatical Wi-Fi connection when booting by using wlan fast connect example.
+A broadcast example thread will be started automatically when booting.
+
+Test:
+1. Prepare a NB and connect to the same AP Ameba connected.
+2. NB: iperf -c 192.168.1.255 -t 60 -i 1 -p 49152 -u
+3. The recv/send messages should be printed out on Ameba console.
+4. Use sniffer to make sure the packets send from Ameba are broadcast messages.
+
+Note:
+If you encounter some message like:
+	ERROR: sendto broadcast
+	[Driver]: skb_unavailable=1 in last 2 seconds
+It means that the skb buffer is not enough for the massive UDP packets to be sent.
+If you want to prevent the error you can add some delay time between sending packets or enlarge the skb buffer configuration.