We write the FPGA loader in LabVIEW
3r33800. 3r3-31. . Here you can argue long and to no avail. The situation is aggravated by the fact that there are a lot of examples of programs on LabVIEW on the network, but they are all focused on the beginner and come down to "oh, look how simple it is, connect the twist to the indicator, twist the handle, change the dial", or at best, the graph in the cycle a random number or a sine is displayed, all this is accompanied by a furious interface in the form of giant toggle switches, twists, and dial gauges. Personally, this conscious simplification annoys me. In a small series of articles I will try to acquaint the reader with the process of developing application software on LabVIEW. In order not to spend a lot of time on the subject area, we will use the described in detail algorithm for loading the configuration file into the FPGA via FTDI in the MPSSE mode (3r37070. Uploading the configuration into the FPGA via USB or parsing the FTDI MPSSE
). In this article I will show how to implement the same FPGA loader, but in the LabVIEW language. 3r33737. 3r33737. 3r33800. 3r33737. The picture is clickable
3r33737. 3r33737. 3r33800.
3r33737. 3r33800. 3r3759. Similarly, create a node for the function 3r36888. FT_GetDeviceInfoDetail . The prototype of the function is:
FT_STATUS WINAPI FT_GetDeviceInfoDetail (
3r33800. 3r3759. When describing the parameters, please note that 3r33688. lpdwFlags , 3r3688. lpdwType , 3r3688. lpdwID , 3r3688. lpdwLocId are passed as pointers to
uint32 3r3689. . Parameters - there is the essence of byte strings (arrays of the type 3r3-3688. Char With a null terminator). Parameters of this type in the call node can be styled in various ways, you can enter them into an array of 8-bit words, but I think it is most convenient to immediately indicate that this is a string and set the expected size. In this case, the output will immediately be a suitable lably string and no additional transformations will be required. 3r33737. 3r33737. 3r33800. 3r33312. 3r33737. 3r33800. 3r3759. Call Library Function 3r33737. 3r33800. 3r3759. This function returns information on the order number 3r-33688. dwIndex . If several FTDI are connected to the computer, in order to read the information for each converter, the function must be called in a loop. The number of loop iterations will give us the previous function 3r36888. FT_CreateDeviceInfoList . 3r33737. 3r33737. 3r33800.
lpSerialNumber and 3r3688. lpDescription
enumalready in the header file ftd2xx.h. In LabVIEW, you can use two controls to create an enumeration: the Text Ring and the Enum itself. Both contain lists of strings with numeric values between which you can switch. The main difference is that "Enum" requires that numeric values be whole consecutive numbers, while there is more freedom in the "Text Ring" - you can specify any values. 3r33737. 3r33737. 3r33800.
indicator. Typeson an array of indicators such as
FTDI Typeand as a result, when the VI is started, the type of the connected converter is displayed: 3r33737. 3r33800. 3r3408. 3r33737. 3r33800. 3r3759. 3r33737. Found three devices 3r33737. 3r33737. 3r33800. 3r3759. It is easy to see that the functionality of the resulting code in the Timeout case is complete, therefore it can be transferred to a separate SubVI. Select the elements that we want to transfer to the sub-device and in the main menu Edit select the item "Create SubVI". 3r33737. 3r33737. 3r33800.
3r33800. 3r? 3517. 3r33518. 3r33737. 3r33800. 3r33737. The picture is clickable 3r33737.
loop. For Loop. 3r33737. 3r33737. 3r33800. 3r3759. After starting the VI, pressing the left button on the element "Select device", you can specify the device to configure. At the same time, the list of devices is updated twice a second. Of course, it would be possible to update the property only if the list was updated, but for the time being this will result in unnecessary cluttering of the block diagram. 3r33737. 3r33737. 3r33800.
Enabled 3r3689. - normal display, the user can control the object; 3r3688. Disabled- the object is displayed on the front panel as usual, but the user cannot control the object; 3r3688. Disabled and Grayed Out - the object is displayed on the front panel as dark, and the user cannot control the object. 3r33737. 3r33737. 3r33800. 3r3759. Create event handlers for
Devices listand 3r3688. File Path , and in them we dim the status indicator, and in the handler of the "Programming" button we assign the property
Enabled 3r3689. . 3r33737. 3r33737. 3r33800.
3r3694. What happened 3r39595.
3r3759. 3r33655. 3r?656. 3r33737. 3r33800. 3r33737. Programm handler: Value Change. 3r33720. 3r33737. 3r33737. 3r33800. 3r3759. 3r3666. 3r3667. 3r33737. 3r33800. 3r33737. Handler "Devices list": Value Change 3r33737. 3r33737. 3r33800. indicator looks like. 3r33737.
3r33737. 3r33800. 3r3759. We will make it easy for the user to search the configuration file - we will configure the file viewing window. Go to the properties of the element
File Path, on the tab "Browse Options" fill in Prompt, Pattern Label, specify the file type filter (Pattern) and the name for the button (Button Text). 3r33737. 3r33737. 3r33800.
3r3694. File selection window 3r39595.
3r33737. 3r33737. 3r33800.
3r33737. 3r33800. 3r3759. Creating a user interface can be considered complete. 3r33737. 3r33737. 3r33800. 3r33737. 3r33737. 3r33800. 3r3759. 3r33737. Launched loader
3r33737. 3r33737. 3r33800. 3r33724. What did you meet today? 3r33737. 3r33737. 3r33800. 3r3759. In this article, using the example of creating a functionally complete application with a minimalist interface, I tried to show different approaches to working in LabVIEW. 3r33737. 3r33737. 3r33800. 3r3759. As a result, we touched on:
3r33800. 3r3784. Setting the properties of a virtual device. We learned how to disable unnecessary menu type items. 3r3r7787. 3r33800. 3r3784. The structure of the virtual device: a cycle with events. 3r3r7787. 3r33800. 3r3784. Work with the structure of events. 3r3r7787. 3r33800. 3r3784. Registration of the sub-device. 3r3r7787. 3r33800. 3r3784. Import functions from dll. 3r3r7787. 3r33800. 3r3784. Work with item properties. 3r3r7787. 3r33800. 3r3756. 3r33737. 3r33800. 3r3759. In the next article, we will delve into working with the API FTD2XX using the example of MPSSE. Load the configuration binary into the FPGA. 3r33737. 3r33737. 3r33800. 3r33737. Materials
3r33737. 3r33800. 3r33767. 3r33800. 3r3784. 3r33770. Download configuration to FPGA via USB or disassemble FTDI MPSSE
3r3r7787. 3r33800. 3r3784. 3r33775. labview_mpsse
. Repository with the project. 3r3r7787. 3r33800. 3r3784. 3r33780. Training stand for DSP
. Iron for experience 3r3r7787. 3r33800. 3r3784. Software Application Development D2XX Programmer's Guide . API Guide D2XX. 3r3r7787. 3r33800.
3r33800. 3r33800. 3r33800. 3r33800.
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