Table of Contents

Overview

A CC3200 device can communicate over the network using standard communication protocols such as TCP and UDP. This example will demonstrate the UDP protocol.

Application details

This application demonstrates how the CC3200 can be used as a client or server for UDP communication.

This application can act as a UDP client and send packets:

1. Open the socket
2. Connect to the UDP server 
3. Send the packets
4. Close the socket

This application can also act as a UDP server and receive packets:

1. Open the socket
2. Create a UDP server
3. Listen for connection
4. Accept a connection
5. Receive packets
6. Close the socket

Default settings are defined in following MACROs in main.c. This configuration can be set statically in source code or changed during run time.

    #define IP_ADDR             0xc0a80167  
    #define PORT_NUM            5001
    #define TCP_PACKET_COUNT    1000

Source Files briefly explained

• main.c – main file calls simplelink APIs to connect to the network, create socket and use it to communicate over UDP by acting as a UDP client or server.
• pinmux.c - pinmux file to mux the device to configure UART peripheral
• startup_*.c - Initialize vector table and IDE related functions

Usage

1. Setup a serial communication application. Open a serial terminal on a PC with the following settings:
   • Port: Enumerated COM port
   • Baud rate: 115200
   • Data: 8 bit
   • Parity: None
   • Stop: 1 bit
   • Flow control: None

2. Edit common.h and modify the values of the below macros for the device to connect to the AP:

   #define SSID_NAME           "<ap_name>"         /* AP SSID */
   #define SECURITY_TYPE       SL_SEC_TYPE_OPEN    /* Security type (OPEN or WEP or WPA*/
   #define SECURITY_KEY        ""                  /* Password of the secured AP */

3. Run the reference application.
   • Open the project in CCS/IAR. Build the application and debug to load to the device, or flash the binary using UniFlash.
4. Connect a PC to the same AP that the CC3200 will be connected to. Find the IP address of the PC. Select option 3 in the serial terminal to edit Settings, then select option 3 to edit the Destination IP. Enter the IP address of the PC.
   • The default IP address can also be modified as IP_ADDR in main.c.
5. Select option 1 to send UDP packets (according to the default settings), option 2 to receive UDP packets, or option 3 to edit settings.
   • You can use Iperf for another CC3200 device to send and receive packets.

Limitations/Known Issues