User manual

Software Examples

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3.2.1 Source File Structure

The project is split into multiple files. This makes it easier to navigate and reuse parts of it for other

projects.

Table 6. Source File and Folders

Name Description

main.c The demo's main function, shared ISRs, and so on

sl_common.h Common SimpleLink™ technology definitions

Driver: board Board specific driver including basic initializations

Driver: cli_uart Command line interface for backchannel UART communication

Driver: spi_cc3100 MSP432 SPI driver to interface CC3100

Driver: uart_cc3100 MSP432 UART driver to interface CC3100

Library: mqtt MQTT protocol library

Library: simplelink Simplelink library containing Wi-Fi APIs

Library: driverlib Device driver library (MSP432DRIVERLIB)

3.2.2 Running the Demo

In order to connect the CC3100BOOST to a wireless access point, start by modifying SSID_NAME and

PASSKEY in the #define section of main.c with your wireless access point's information. You may also

need to change SEC_TYPE depending on your access point's setting.

Next, using TI Cloud tools or offline IDEs, build and download the project to the MSP432 LaunchPad. If

not already, plug the CC3100BOOST BoosterPack onto the LaunchPad, and connect the LaunchPad to

your computer. The CC3100 should automatically try to connect to the access point with the provided

credentials. The LaunchPad outputs status messages through its Application/User UART COM port, which

can be viewed by opening it using terminal applications (see Section 2.3.2).

Once the CC3100 has established internet connection and successfully subscribed to the public MQTT

broker server, the LaunchPad RGB LED is ready to be controlled with Twitter. Any public tweets in the

following format will change the RGB LED color on all MSP‑EXP432P401R LaunchPad running this

demo:

RGB(red_value, green_value, blue_value) #MSP432LaunchPad

The color parameters can be integers ranging from 0 to 255.

Pressing the left push button S1 on the LaunchPad publishes a 32-bit unique ID from the LaunchPad to

the MQTT broker, which then gets tweeted by the twitter account, @MSPLaunchPad. You may then use

this 32-bit Unique ID in your tweet message to control the RGB LED on the specific

LaunchPad+CC3100BOOST combination tied to that unique ID:

<32-bit unique ID> RGB(red_value, green_value, blue_value) #MSP432LaunchPad

MSP

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EXP432P401R LaunchPad™ Evaluation Kit SLAU597–March 2015

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