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Old 01-10-2008, 07:33 PM   #1
gl2008
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Using FTDI USB 'direct D2xx' libraries


Hi,

I'm not sure if this is the correct forum for this - happy to be corrected.

I am having problems porting an application from Win to Linux. It talks to an FTDI USB-serial chip. I am using the FTDI supplied 'direct D2xx' library (version 0.4.13). Installation, linking etc seems OK, as some functions seem to work OK.

However, my problem is that the function FT_GetDeviceInfoList() gives all nulls for the various information fields (eg description, serial number, manufacturer, etc). The functions FT_GetDeviceInfoDetail() and FT_ListDevices() fail similarly. The function FT_CreateDeviceInfoList() returns the correct number of devices connected (tested with 0,1 or 2 devices).

The system knows the correct information about the devices, checked by both the KDE program KInfoCenter->USBDevices, and the program 'usbview'.

I have tried removing the modules ftdi_sio and usbserial (/sbin/rmmod ....)

Has anyone had success/problems with using this library, especially running 2.6 kernel (I have 2.6.18, fedora 6) and version 0.4.13 of the FTDI library?

I have tried support at FTDI but they have not responded at all!

Thanks,
gl2008
 
Old 01-14-2008, 04:58 PM   #2
gl2008
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As there have been no replies to my query, can anyone point me to another forum (either on LinuxQuestions or otherwise) that would be more appropriate?

Thankyou, gl2008
 
Old 01-31-2008, 09:59 PM   #3
mk1
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Did you try to run your program by root?
 
Old 01-31-2008, 10:28 PM   #4
gl2008
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Since posting my initial question, that has been suggested to me (logging on as root) and yes, it does avoid the problems I had. However, this does not seem a very satisfactory way of working. Are there any other suggestions?

Thanks, gl2008.
 
Old 02-01-2008, 03:14 AM   #5
mk1
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My Linux system is Debian (sid) and the kernel version is 2.6.20.
I'm using FT245RL chip.

# lsusb
Bus 007 Device 013: ID 0403:6001 Future Technology Devices International, Ltd FT232 USB-Serial (UART) IC

I tried a sample program (Simple) which is in the D2XX driver.
I had added following two lines:
#include <stdlib.h> //for malloc
#include <string.h> //for memset

And I changed following line;
int iNumDevs = 0; => DWORD iNumDevs = 0;

I succeeded compile of the source without any warning.
However the result was;

Number of devices is 1
Dev 0:
Flags=0x0
Type=0x0
ID=0x0
LocId=0x0
SerialNumber=
Description=
ftHandle=0x0
Error: FT_ListDevices(18)

I ran this program by root, there were no problem..

By the way. There is another library for FTDI chip.
http://www.intra2net.com/de/produkte/opensource/ftdi/

Thanks

Last edited by mk1; 02-01-2008 at 08:56 AM.
 
  


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