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Code Examples |
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Visual Basic Examples |
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This page contains examples of communicating with FTDI devices through
the D2XX drivers and FTD2XX.DLL using Visual Basic.
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D2XX Module |
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many of the Visual Basic examples posted on this page use a module to interface to the
D2XX DLL. To download the unit (D2XX_Module.bas) for Visual Basic
6, click here.
Please note that the code examples below may already contain a module
handling the D2XX DLL interface. There may be differences between the
current module file and the ones distributed with the examples. |
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Example 1 |
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This application example was originally donated by Christian Vogt of
Itec-technology and illustrates how to program the optional
93C46/93C56/93C66 EEPROM in VB6 using the latest D2XX driver release.
This enhanced version has restructured the program to use a separate
unit to set up the DLL calls (module1.bas) which can then be re-used for
developing other applications and has been updated to use the new EEPROM
structure with FT2232C support. The DLL version must be greater than
2.1.3.1 and the latest drivers must be installed for this example to
work.
The code can be easily
modified to work with the original FT_PROGRAM_DATA structure and older
driver/DLL versions: simply remove the signature1, signature2 and
version entries from the start of the structure and also remove the Rev
5 (FT2232C) entries from the bottom of the structure.
Implementing the
FT_PROGRAM_DATA structure and the respective DLL-calls with VB6 has some
"hooks"... The code uses another DLL, APIGID32.DLL, from
DESAWARE Inc. It is distributed with Dan Appleman's book
"Visual Basic Programmer's Guide to the Win32 API" -
click here for info on this book.
Those of you who wish to use this code should consider purchasing this
essential book.
This code is provided "as-is"
for illustration purposes only and as such neither FTDI or Itec-technology
provide technical support for this VB6 code or the APIGID32 DLL
functionality.
To download the example,
click here.
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Example 2 |
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Dan Kemppainen of IR Telemetrics has kindly donated a modified version
of Christian Vogt's original programming example. This version
does not require the 3rd party APIGID32 DLL and is saved as a VB5
file. This code is provided "as-is" for illustration purposes only and
as such neither FTDI or IR Telemetrics provide technical support for
this VB5 code.
To download the example,
click here.
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Example 3 |
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This program returns device information on two
devices connected at the same time. Notice that there are two separate
declarations for the different ways to use FT_ListDevices: one to get
the number of devices currently attached and another to return a serial
number or description string. The sample gets the number of devices
with FT_GetNumDevices() and then gets strings from each device in turn
with FT_ListDevices(0,...) and FT_ListDevices(1,..).
Please
note that this code is primarily intended to illustrate how to interface
to the D2XX DLL in Visual Basic. It's functionality as a working
application is limited to sending and receiving data from an FTDI
UART device with a loop-back connector plugged into the RS232 port.
To download this example,
click here.
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Example 4 |
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This example shows how to
return device string information, open devices by description, set Baud
rates, set flow control, set data characteristics, write string data to
the device, read string data from the device and close the device.
This example was created
using VB.NET and the module provided has many of the common calls to
FTD2XX.DLL already set up with example functions.
To download this example,
click here.
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Example 5 |
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This
variant of FTDI's D2XXAccess example for Windows CE uses VB.NET to list
devices, return description strings, open devices, set Baud rates, read
data and write data. This example is also available in
C# and
C++ for Windows CE
platforms.
This code
requires that FTDI's D2XX drivers for Windows CE be installed.
These can be obtained through our
Drivers page.
To download
the VB.NET version of D2XXAccess for Windows CE,
click here.
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Example 6 |
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Our
thanks go to Bob Freeth for providing this VB6 example of using the
FT2232C MPSSE for SPI communication with a MAX187 ADC.
Source
code and executable are available for free
download.
This code is provided "as-is"
for illustration purposes only and as such neither FTDI or Bob Freeth
provide technical support for this VB6 code.
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