Information

Configuring the Weather Display Quickstart Application

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1.3 Install Drivers on the Host Computer

In order to debug and download a custom application in the microcontroller’s flash memory and use Virtual

COM Port connectivity, you must first install the following drivers on the host computer:

• Stellaris Virtual Serial Port

• Stellaris ICDI JTAG/SWD

• Stellaris ICDI DFU

Please see SPMU287 for detailed instructions on the driver install process.

NOTE: The ICDI drivers identify themselves as Stellaris ICDI, but they work properly with both

Stellaris and Tiva microcontroller kits.

These drivers provide the debugger with access to the JTAG/SWD interface and the host PC with access

to the Virtual COM Port. With these drivers installed, Windows automatically detects any new Tiva boards

(with a Stellaris ICDI) that you connect to your computer and installs the required drivers for you.

2 Configuring the Weather Display Quickstart Application

The DK-TM4C129X development board comes preprogrammed with the Weather Display quickstart

application. Once you power the board and connect it to the internet with an Ethernet cable, this

application runs automatically. The quickstart application displays current weather data along with

forecasted high and low temperatures for 30 cities around the world. The user can input another city to

see data for that city and can configure temperature data to display in degrees Celsius or degrees

Fahrenheit. The application supports the use of an internet proxy that can be entered by the user.

Swipe your finger across the screen to the left or right to scroll through the pre-programmed cities. Swipe

your finger down the screen to get to the Configuration display, which provides the following options:

• Toggle switch to enable a custom city and a city data field to enter the city name. The city name

should be entered as "City, State" for cities in the United States and "City, Country" for cities in other

countries. The city that is manually entered appears in the city list after Vancouver, Canada.

• Toggle switch to enable a proxy server and a proxy data field to enter the proxy information.

• Toggle switch to change from degrees Celsius or degrees Fahrenheit.

The MAC and IP addresses are visible at the bottom of the Configuration display. If you enter a custom

city or a proxy server, this information is stored away from the application in Flash memory and persists if

the application is reprogrammed onto the board. To remove these entries, you must erase the entire Flash

memory.

3 Using the Weather Display Quickstart Application

You can navigate among the screens by swiping on the screen. Side-to-side swipes scroll through the list

of cities. Swiping top to bottom opens the Configuration display and swiping bottom to top closes the

Configuration display. In addition, you can tap the screen to bring up some navigational arrows. Tap the

arrows to move through the city list. Tap the tab at the top to open the Configuration display and tap the

tab at the bottom to close it.

Note that there may be a small delay in data availability as data is obtained from Open Weather Map. The

application uses the lwIP stack to obtain an address through DNS, resolve the address of the Open

Weather Map site and then build and handle all of the requests necessary to access the weather

information. The data is updated once when the application starts, so any subsequent views of the data

are not updated. To update the weather data, press the Reset button. Be aware that the Open Weather

Map site limits the number of requests coming from a single IP address and may fail to respond if a

request for data for a city is made more often than once every 10 minutes.

Tiva™ C Series TM4C129X Development Kit ReadMe First SPMU359–October 2013

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