TFT LCD Panel - Browsing Flash Memory and SD Card Content

Frozen Content

The GUI provides a screen for browsing the file content of both the NB2DSK01's common-bus Flash memory and also an SD card currently inserted into the motherboard's SD card reader. To access this screen, simply touch the icon on the GUI's Home screen.

Figure 1. Browsing file content.

The screen will present the two storage locations in drive-style fashion:


B: SD Card

Touch on one of the entries – if files are stored in a folder structure, each folder will be listed. Simply touch on a folder and then touch the icon at the bottom-right of the screen, to expand the folder and browse its contents.

FPGA programming files can be downloaded directly to the daughter board FPGA from this screen. Simply select the required programming file and then touch the icon that appears at the bottom-right corner of the screen.

Program code files (*.hex) can not currently be downloaded from the Browse screen. To download a design fully, an EXAMPLE file should be made, stored on the SD card, and the download performed from the Examples screen.

If there are any image files(*.bmp or *.jpg), these can be opened directly within the TFT LCD panel. Once opened, simply touch the screen again to return to the GUI.

Similarly, if there are any audio files (*.wav), you can open these for listening, directly from the panel. Doing so will open the GUI's Audio Player, the screen for which is illustrated in Figure 2.

Figure 2. Playback music (wav) files using the GUI's
Audio Player.

Initially, controls are available to start playback and choose which of the speakers on the attached Desktop Stereo Speaker Assembly NB2DSK-SPK01 are enabled - Left channel, Right channel, or both. Simply touch on a speaker icon to toggle its state between enabled and disabled .

During playback, pause and stop controls become available and a progress bar is used to represent playback time (Figure 3).

Figure 3. Screen appearance during playback.

Use the NB2DSK01's volume control to crank-up the sound as required!

A Word about Storage...

Both the NB2DSK01 common-bus Flash memory and the inserted SD card appear as additional drives within Windows Explorer, allowing you to quickly add file content to either storage location, or copy or move content between them.

The common-bus Flash memory offers just under 30MB of storage space. Content written to this memory will remain until deleted – it does not expire upon power down of the Desktop NanoBoard.

The following should be considered when using these two file storage facilities:

  • EXAMPLE files can be stored in both locations, but the Examples screen of the GUI will only list those examples found on the SD card.

You must perform a reset of the NanoTalk Controller in order to refresh the displayed list of contents for both SD card and Flash memory.

  • If you wish to use the GUI's screen saver facility, the image files (.bmp and/or .jpg) must be stored within a folder named ScreenSaver in either storage location.
  • Only those default introductory screens resident in the Flash memory's Welcome folder (welc1.jpg to welc6.jpg) are expected and displayed by the GUI when the option to show intro screens is enabled. Any additional Bitmap or JPEG files added to this folder will not be displayed as part of the intro-cycle.
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