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This example application is a data logger. It can be configured to collect data from up to 10 data sources. The possible data sources are: - 4 analog inputs, 0-20V - 9-axis I2C fusion data (3axis gyro, 3axis accelorometer, 3axis compass) - internal and external temperature sensors - processor current consumption
The data logger provides a menu navigation that is operated by the buttons on the board (up, down, left, right, select). The data logger can be configured by using the menus. The following items can be configured: - data sources to be logged - sample rate - storage location - sleep modes - clock
Using the data logger:
Use the CONFIG menu to configure the data logger. The following choices are provided:
- CHANNELS - enable specific channels of data that will be logged - PERIOD - select the sample period - STORAGE - select where the collected data will be stored: - FLASH - stored in the internal flash memory - USB - stored on a connected USB memory stick - HOST PC - transmitted to a host PC via USB OTG virtual serial port - NONE - the data will only be displayed and not stored - SLEEP - select whether or not the board sleeps between samples. Sleep mode is allowed when storing to flash at with a period of 1 second or longer. - CLOCK - allows setting of internal time-of-day clock that is used for time stamping of the sampled data
Use the START menu to start the data logger running. It will begin collecting and storing the data. It will continue to collect data until stopped by pressing the left button or select button.
While the data logger is collecting data and it is not configured to sleep, a simple strip chart showing the collected data will appear on the display. If the data logger is configured to sleep, then no strip chart will be shown.
If the data logger is storing to internal flash memory, it will overwrite the oldest data. If storing to a USB memory device it will store data until the device is full.
The VIEW menu allows viewing the values of the data sources in numerical format. When viewed this way the data is not stored.
The SAVE menu allows saving data that was stored in internal flash memory to a USB stick. The data will be saved in a text file in CSV format.
The ERASE menu is used to erase the internal memory so more data can be saved.
When the board running qs-logger is connected to a host PC via the USB OTG connection for the first time, Windows will prompt for a device driver for the board. This can be found in /ti/TivaWare_C_Series-x.x/windows_drivers assuming you installed the software in the default folder.
A companion Windows application, logger, can be found in the /ti/TivaWare_C_Series-x.x/tools/bin directory. When the data logger's STORAGE option is set to "HOST PC" and the board is connected to a PC via the USB OTG connection, captured data will be transfered back to the PC using the virtual serial port that the EK board offers. When the logger application is run, it will search for the first connected board and display any sample data received. The application also offers the option to log the data to a file on the PC.
