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https://github.com/jialexd/sdk-ameba-v4.0c_180328.git
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28 lines
1 KiB
Text
28 lines
1 KiB
Text
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LWIP BROADCAST EXAMPLE
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Description:
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Listen broadcast message on port 49152.
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Send packet with the content of received packet to broadcast address.
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Configuration:
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[lwipopts.h]
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#define LWIP_UDP 1
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[platform_opts.h]
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#define CONFIG_EXAMPLE_BCAST 1
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Execution:
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Can make automatical Wi-Fi connection when booting by using wlan fast connect example.
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A broadcast example thread will be started automatically when booting.
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Test:
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1. Prepare a NB and connect to the same AP Ameba connected.
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2. NB: iperf -c 192.168.1.255 -t 60 -i 1 -p 49152 -u
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3. The recv/send messages should be printed out on Ameba console.
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4. Use sniffer to make sure the packets send from Ameba are broadcast messages.
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Note:
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If you encounter some message like:
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ERROR: sendto broadcast
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[Driver]: skb_unavailable=1 in last 2 seconds
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It means that the skb buffer is not enough for the massive UDP packets to be sent.
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If you want to prevent the error you can add some delay time between sending packets or enlarge the skb buffer configuration.
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