CC3100 File Download Application

Overview and Application Details

This sample application demonstrates how to connect w/ a server, download a file and save it on the serial-flash. The application developers can use this scheme to update files over the network

This application:

• connects to www.ti.com and downloads a 40KB file
• saves the file on the serial-flash as a temporary-file
• verifies if the file is downloaded completely
• replaces the existing version of the file on the serial-flash and deletes the temporary-file.

If the application developer intends to download a file from the servers that don't support Chuncked Format for sending the data to their clients, he/she should modify the application for handling the responses from these servers.

The application developers can change the server and the requested file by modifying the values of HOST_NAME and PREFIX_BUFFER & POST_BUFFER respectively. Size of the saved file can be changed by modifying the value of SIZE_45K but the existing file at FILE_NAME has to be deleted first.

Note: This wiki page is only applicable for CC3100-SDK v1.0.0 and upward releases. For documentation on older SDKs' examples, refer corresponding file in <cc3100-sdk-installation-location>\cc3100-sdk\docs\examples\

Usage

Prerequisite: This application requires an access-point with internet connectivity

• Connect the board to PC and configure the terminal program for seeing the logs - [| CC31xx_&_CC32xx_Terminal_Setting_Wiki] has detailed instructions for configuring the terminal-program
• Open sl_common.h and change SSID_NAME, SEC_TYPE and PASSKEY as per your access-point's properties. SimpleLink device will connect to this AP when the application is executed
• Build and run the application
• See the self explanatory logs on the terminal-program's console

   The application connects to the www.ti.com and requests for /lit/er/swrz044b/swrz044b.pdf from the server. The file is saved on the serial flash as a temporary file whose name is defined by the macro TEMP_FILE_NAME
   It verifies if the file is downloaded completely and on a successful verification, replaces the original file FILE_NAME w/ the downloaded file.

• On success, below message will be displayed on the terminal

Limitations/Known Issues

• The files can only be download from the servers that supports Chuncked Format for sending the data to their clients. If the application developer intends to download a file from the servers that don't support Chuncked Format, he/she should modify the application for handling the responses from these servers.

Links

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