Future Technology Devices
International Ltd.
AN2232-02 Bit Mode Functions for
the FT2232
Copyright © 2006 Future Technology Devices International Ltd.
2
AN2232C-02 Bit Mode Functions for the FT2232
1
Bit Mode Functions For the FT2232
1.1
Overview
The D2XX functions FT_Set BitMode 3 and FT_GetBitMode 5 are used to enable several
device IO modes for the FT2232. This document describes these functions in terms of the FT2232
and provides some examples.
Copyright © 2006 Future Technology Devices International Ltd.
Bit Mode Functions For the FT2232
1.2
3
FT_SetBitMode
Set the device IO bit mode.
FT_STATUS FT_SetBitMode (FT_HANDLE ftHandle, UCHAR ucMask, UCHAR ucMode)
Parameters
ftHandle
Handle of the device.
ucMask
Required value for bit mode mask. This sets up which bits are input and which bits are output.
The ucMask byte sets the direction. A '0' means that the corresponding bit is to be an input, while
a '1' means that the corresponding bit is to be an output.
ucMode
Mode value as shown in the following table:
Mode
Value (hex)
Reset the IO Bit Mode
0x0
Asynchronous Bit Bang Mode
0x1
MPSSE
0x2
Synchronous Bit Bang Mode
0x4
MCU Host Bus Emulation
0x8
Fast Serial For Opto-Isolation
0x10
Return Value
FT_OK if successful, otherwise the return value is an FT error code.
Copyright © 2006 Future Technology Devices International Ltd.
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1.3
AN2232C-02 Bit Mode Functions for the FT2232
FT_SetBitMode Example
1) To enable MPSSE Mode:
HANDLE ftHandle;
// valid handle returned from FT_Open or FT_W32_CreateFile
FT_STATUS ftStatus;
UCHAR Mask = 0xff;
// set all IOs to output
UCHAR Mode = 2;
// set MPSSE mode
ftStatus = FT_SetBitMode(ftHandle,Mask,Mode);
if (ftStatus == FT_OK) {
// MPSSE Mode enabled
}
else {
// FT_SetBitMode FAILED!
}
2) To enable Asynchronous Bit Bang Mode (See AN232BM-01
7
):
HANDLE ftHandle;
// valid handle returned from FT_Open or FT_W32_CreateFile
FT_STATUS ftStatus;
UCHAR Mask = 0x07;
// set bits 0, 1 and 2 to output
UCHAR Mode = 1;
// set Asynchronous Bit Bang mode
ftStatus = FT_SetBitMode(ftHandle,Mask,Mode);
if (ftStatus == FT_OK) {
// Asynchronous Bit bang Mode enabled
}
else {
// FT_SetBitMode FAILED!
}
3) To reset the IO bit mode:
ftStatus = FT_SetBitMode(ftHandle,0,0);
4) To enable Synchrounous Bit Bang mode (using D2XXUnit.pas for Delphi):
Set_USB_Device_BitMode($00,$04); to enable it
Set_USB_Device_BitMode($00,$00); to reset it
5) To enable For MCU Host Bus Emulation mode (using D2XXUnit.pas for Delphi):
Set_USB_Device_BitMode($00,$08); to enable it
Set_USB_Device_BitMode($00,$00); to reset it
Copyright © 2006 Future Technology Devices International Ltd.
Bit Mode Functions For the FT2232
1.4
FT_GetBitMode
Get the current value of the IO bit mode.
FT_STATUS FT_GetBitMode (FT_HANDLE ftHandle, PUCHAR pucMode)
Parameters
ftHandle
Handle of the device.
pucMode
Pointer to unsigned char to store bit mode value.
Return Value
FT_OK if successful, otherwise the return value is an FT error code.
Copyright © 2006 Future Technology Devices International Ltd.
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6
1.5
AN2232C-02 Bit Mode Functions for the FT2232
FT_GetBitMode Example
To get the current bit mode value
HANDLE ftHandle;
// valid handle returned from FT_Open or FT_W32_CreateFile
UCHAR BitMode;
FT_STATUS ftStatus;
ftStatus = FT_GetBitMode(ftHandle,&BitMode);
if (ftStatus == FT_OK) {
// BitMode contains current value
}
else {
// FT_GetBitMode FAILED!
}
Copyright © 2006 Future Technology Devices International Ltd.
Bit Mode Functions For the FT2232
1.6
References
DS2232C - FT2232C Device datasheet
AN232-01 - FT232BM/FT245BM Bit Bang Mode
AN2232-01 - Command Processor for MPSSE and MCU Host Bus Emulation Modes
Sample Projects - MPSSE Code Examples
D2XX Programmer's Guide
Copyright © 2006 Future Technology Devices International Ltd.
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AN2232C-02 Bit Mode Functions for the FT2232
2
History, Disclaimer, Contact
2.1
Document Revision History
Version
Release Date
Comments
1.0
April 2004
Initial release.
2.0
December 2005
New format.
2.1
October 2006
References to FT2232C changed to FT2232 after release of
FT2232D.
Copyright © 2006 Future Technology Devices International Ltd.
History, Disclaimer, Contact
2.2
9
Disclaimer
Copyright © 2006 Future Technology Devices International Ltd.
Neither the whole nor any part of the information contained in, or the product described in this
manual, may be adapted or reproduced in any material or electronic form without the prior written
consent of the copyright holder.
This product and its documentation are supplied on an as-is basis and no warranty as to their
suitability for any particular purpose is either made or implied.
Future Technology Devices International Ltd. will not accept any claim for damages howsoever
arising as a result of use or failure of this product. Your statutory rights are not affected.
This product or any variant of it is not intended for use in any medical appliance, device or system
in which the failure of the product might reasonably be expected to result in personal injury.
This document provides preliminary information that may be subject to change without notice.
Copyright © 2006 Future Technology Devices International Ltd.
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2.3
AN2232C-02 Bit Mode Functions for the FT2232
Contact Information
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ROC
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Web Site URL: http://www.ftdichip.com
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Future Technology Devices International Limited (USA)
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Suite B800
Hillsboro, OR 97124-6499
USA
Tel: +1 (503) 547-0988
Fax: +1 (503) 547-0987
E-Mail (Sales): [email protected]
E-Mail (Support): [email protected]
E-Mail (General Enquiries): [email protected]
Web Site URL: http://www.ftdichip.com
Agents and Sales Representatives
Please visit the Sales Network page of the FTDI Web site for the contact details of our
distributor(s) in your country.
Copyright © 2006 Future Technology Devices International Ltd.
Index
Index
-FFT_GetBitMode
FT_SetBitMode
5, 6
3, 4
Copyright © 2006 Future Technology Devices International Ltd.
11