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[Ftdi-usb-sio-devel] usb-uirt problems with ftdi_sio in 2.6.22.1

From: John H. <mis...@gm...> - 2007-08-12 07:55:36

This was broken a while back with fedora 7's kernel, and someone told
me a patch I could try, but now it is broken again in
Linux home 2.6.22.1-41.fc7 #1 SMP Fri Jul 27 18:10:34 EDT 2007 i686
i686 i386 GNU/Linux

What to do?  Can I at least patch or do something to where it works
again for now?

> > lircd: tty_setdtr: ioctl(TIOCMGET) failed
> > lircd: tty_setdtr: Bad address
> This is a problem of the ftdi_sio driver.
> ftdi_tiocmget is obviously not implemented for your hardware.
> You should report this to the driver authors.
>
> Christoph

--
./lircd -H usb_uirt_raw -d /dev/ttyUSB0 -n -D1
lircd: started server socket
lircd: parsing remote
lircd: parsing DISH_1 remote
lircd: parsing remote
lircd: parsing PinnacleSysRemote remote
lircd: config file read
lircd: lircd(usb_uirt_raw) ready
lircd: registering local client
lircd: accepted new client on /dev/lircd
lircd: writing command 23
lircd:  23 dd
lircd: wrote 2
lircd: cmd res 3:
lircd:  09 05 01
lircd:
lircd: uirt2_raw: checksum error
lircd: uirt2: detection of uirt2 failed
lircd: uirt2: trying to detect newer uirt firmware
lircd: writing command 23
lircd:  23 dd
lircd: wrote 2
lircd: cmd res 8:
lircd:  09 05 01 01 1a 03 04 cf
lircd:
lircd: uirt2_raw: UIRT version 0905 ok
lircd: writing command 21
lircd:  21 df
lircd: wrote 2
lircd: cmd res 1:
lircd:  21
lircd:
lircd: tty_setdtr: ioctl(TIOCMGET) failed
lircd: tty_setdtr: Bad address
lircd: uirt2_raw: could not set DTR
lircd: tty_setdtr: ioctl(TIOCMGET) failed
lircd: tty_setdtr: Bad address
lircd: caught signal
Terminated

On 12 Aug 2007 09:40:00 +0200, Christoph Bartelmus <li...@ba...> wrote:
> Hi John,
>
> on 12 Aug 07 at 02:22, you wrote:
> [...]
> > lircd: tty_setdtr: ioctl(TIOCMGET) failed
> > lircd: tty_setdtr: Bad address
>
> This is a problem of the ftdi_sio driver.
> ftdi_tiocmget is obviously not implemented for your hardware.
> You should report this to the driver authors.
>
> Christoph
>
> -------------------------------------------------------------------------
> This SF.net email is sponsored by: Splunk Inc.
> Still grepping through log files to find problems?  Stop.
> Now Search log events and configuration files using AJAX and a browser.
> Download your FREE copy of Splunk now >>  http://get.splunk.com/
>

[Ftdi-usb-sio-devel] Per byte parity errors

From: Matthew P. <mp...@gm...> - 2007-07-13 23:22:18

Is there a way to receive per byte parity errors using this driver?
Currently it looks like it will show parity errors for every byte received
if any of the bytes in the transmission contain parity errors.  I am trying
to use the device with a protocol that utilizes mark and space parity to set
the wakeup bit for the first byte on each incoming packet.

Thanks,
Matt Peppin

[Ftdi-usb-sio-devel] midi serial port OK and then...

From: nicolas r. <nic...@ya...> - 2007-07-10 16:41:29

Hi,


I read this thread : 

http://sourceforge.net/mailarchive/message.php?msg_id=200408231132.56743.abbotti%40mev.co.uk

and succefully create a ttyUSB0 serial port working at
31250 (on the B38400).
But how to configure that port in order to be
recognized as a midi device by my ubuntu FF box ?

I know this question isn't direcly related to the ftdi
dev list, but I'm sure there is some linux gurus that
already configure that ?

Nicolas

Nicolas ROLLAND
9 rue de la Grande Armée
13001 MARSEILLE
0491083231
nic...@ya...


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Re: [Ftdi-usb-sio-devel] ftdio_sio module broken with fedora 7 BUG: unable to handle kernel NULL pointer dereference at virtual address

From: Peter S. <sht...@sp...> - 2007-06-05 07:31:31

Attachments: ftdi_sio.patch

I Had the same problem.
In fact when driver is cleaned up in version 1.4.3 the quirks for 
USB-UIRT and HE-TIRA1 are executed before common initialization and 
that's why they writes to pointer which points to NULL. I have written 
this patch in order to get these devices to work. I have USB-UIRT and 
some other device and both of them are using driver ftdi_sio.
With this patch both devices are working perfectly.
I have no HE-TIRA1 to see if patch works for that device.
If you find it useful please forward it to kernel maintainer for this 
driver.

Regards!

Re: [Ftdi-usb-sio-devel] ftdio_sio module broken with fedora 7 BUG: unable to handle kernel NULL pointer dereference at virtual address

From: John H. <mis...@gm...> - 2007-06-02 03:32:10

help?  I've been using this module successfully with fc6 for months
with usb-uirt.

Upgraded to f7 on my dell e510 and it says the following...
Linux home 2.6.21-1.3194.fc7 #1 SMP Wed May 23 22:35:01 EDT 2007 i686
i686 i386 GNU/Linux


drivers/usb/serial/usb-serial.c: USB Serial support registered for
FTDI USB Serial Device
ftdi_sio 3-2:1.0: FTDI USB Serial Device converter detected
BUG: unable to handle kernel NULL pointer dereference at virtual
address 00000014
 printing eip:
f8a1740a
*pde = 00000000
Oops: 0002 [#1]
SMP
last sysfs file: /devices/pci0000:00/0000:00:1d.7/usb5/idVendor
Modules linked in: ftdi_sio bluetooth snd_seq snd_ac97_codec usblp
v4l1_compat fw_core snd_rawmidi sr_mod snd_pcm_oss snd_mixer_oss
ac97_bus snd_util_mem usbserial e100 serio_raw snd_seq_device
snd_hwdep snd_pcm emu10k1_gp cdrom mii snd_timer gameport snd
soundcore iTCO_wdt snd_page_alloc i2c_i801 iTCO_vendor_support pcspkr
i2c_core floppy sg joydev usb_storage ata_piix ata_generic libata
sd_mod scsi_mod ext3 jbd mbcache ehci_hcd ohci_hcd uhci_hcd
CPU:    0
EIP:    0060:[<f8a1740a>]    Not tainted VLI
EFLAGS: 00010246   (2.6.21-1.3194.fc7 #1)
EIP is at ftdi_USB_UIRT_setup+0x34/0x4e [ftdi_sio]
eax: 00000000   ebx: f583f400   ecx: f8a17b34   edx: f8a173d6
esi: f8a1dae0   edi: 00000040   ebp: f8a1dae0   esp: f582acdc
ds: 007b   es: 007b   fs: 00d8  gs: 0033  ss: 0068
Process modprobe (pid: 935, ti=f582a000 task=f5913150 task.ti=f582a000)
Stack: f791e464 00000246 f598fb00 f5e823c0 f8a160b5 f898690a f898855b f8a18f6f
      f5ea06d0 f8a194fa f5ea0600 f5ea4800 f8a1dae0 00000000 00000000 00000001
      00000001 f583f400 00000000 c1806d60 00000001 00000001 00000001 00000000
Call Trace:
 [<f8a160b5>] ftdi_sio_attach+0xf/0x12 [ftdi_sio]
 [<f898690a>] usb_serial_probe+0x97b/0xdd1 [usbserial]
 [<c042e748>] lock_timer_base+0x19/0x35
 [<c042e7a8>] try_to_del_timer_sync+0x44/0x4a
 [<c05692c8>] usb_resume_both+0xa1/0xb7
 [<c056947c>] usb_autopm_do_device+0xb3/0xbd
 [<c04ad4dd>] sysfs_create_link+0x128/0x13f
 [<c0568fd2>] usb_match_one_id+0x1c/0x71
 [<c0569d2d>] usb_probe_interface+0x81/0xb2
 [<c05529ab>] really_probe+0xc6/0x14f
 [<c0552a78>] driver_probe_device+0x44/0xa5
 [<c0552b72>] __driver_attach+0x0/0xa5
 [<c0552be2>] __driver_attach+0x70/0xa5
 [<c0551ffb>] bus_for_each_dev+0x37/0x59
 [<c055282a>] driver_attach+0x16/0x18
 [<c0552b72>] __driver_attach+0x0/0xa5
 [<c05522ad>] bus_add_driver+0x5e/0x15f
 [<c056985c>] usb_register_driver+0x6d/0xd4
 [<f89857b5>] usb_serial_register+0x1ed/0x1f6 [usbserial]
 [<f8806091>] ftdi_init+0x91/0xbe [ftdi_sio]
 [<c04432e4>] sys_init_module+0x16c3/0x17fa
 [<c04755f8>] do_sync_read+0xc7/0x10a
 [<c0468484>] do_mmap_pgoff+0x593/0x6f3
 [<c05507e5>] device_remove_file+0x0/0x25
 [<c0475531>] do_sync_read+0x0/0x10a
 [<c0475e85>] vfs_read+0xa6/0x152
 [<c0404f70>] syscall_call+0x7/0xb
 =======================
Code: ee a1 f8 00 74 1c c7 44 24 08 a4 86 a1 f8 c7 44 24 04 b7 88 a1
f8 c7 04 24 d5 88 a1 f8 e8 49 03 a1 c7 8b 43 14 8b 80 8c 01 00 00 <83>
48 14 30 c7 40 08 4d 00 00 00 c7 80 80 00 00 00 0f 00 00 00
EIP: [<f8a1740a>] ftdi_USB_UIRT_setup+0x34/0x4e [ftdi_sio] SS:ESP 0068:f582acdc

Re: [Ftdi-usb-sio-devel] Troubleshooting FTDI245BM with Mandriva2007Spring

From: Diego R. F. <kat...@gm...> - 2007-05-17 01:30:03

Working platform Epia-CN mini-ITX - with Via VT8237R+ chipset

thanks again

On 5/16/07, Diego Rodrigues Ferreira <kat...@gm...> wrote:
>
> Hi Everyone!
>
> I am having trouble accessing FTDI245 with the defaults configurations
> used on other LINUX distributions.
> Using Mandriva 2007 Spring, kernel 2.6.17-13mdv (ftdi_sio built-in).
>
> What I have done until now:
>
> - cp libftd2xx.so.0.4.12 /usr/local/lib
> - ln -s libftd2xx.so.0.4.12 /usr/local/lib/libftd2xx.so
> - ln -s libftd2xx.so.0.4.12 /usr/lib/libftd2xx.so
> - ln -s libftd2xx.so.0.4.12 /usr/local/lib/libftd2xx.so.0
> - ln -s libftd2xx.so.0.4.12 /usr/lib/libftd2xx.so.0
> - Add the following line to /etc/fstab:
> none /proc/bus/usb usbfs defaults,mode=0666 0 0 (devmode=0666 does not
> work either)
> - mount -a
> - connected the device to usb port
> - with lsusb I can visualize the device connected and when listing
> /proc/bus/usb/devices, It recognizes the device with
> VID/PID/Serial/Description fields all OK! but no driver!? => Driver=(none)
> - Finally run the test program, with the following FTD2XX calls:
>
>     DWORD *numDevs;
>     FT_STATUS ftStatus = FT_SetVIDPID(VID, PID);
>     if (ftStatus != FT_OK)
>     {
>         return ftStatus;
>     }
>     ftStatus=AQUSB_INVALID_PARAMETER;
>     ftStatus=FT_ListDevices(numDevs,NULL,FT_LIST_NUMBER_ONLY);
>     if (ftStatus != FT_OK)
>     {
>         return ftStatus;    }
>     return numDevs;
>
> - This returns 0 devices!
>
> - Researching the system, I could notice that modprobe.alias and
> modprobe.usbmap sets driver for PID/VID. So I set PID/VID pointing to
>   ftdi_sio also.
>
> - running again the test program, the same error! And still, the driver is
> not recognized in /proc/bus/usb/devices.
>
> PS: The device is externally powered (not through USB).
>
> Any tips?
>
>
>

[Ftdi-usb-sio-devel] Troubleshooting FTDI245BM with Mandriva2007Spring

From: Diego R. F. <kat...@gm...> - 2007-05-17 01:24:57

Hi Everyone!

I am having trouble accessing FTDI245 with the defaults configurations used
on other LINUX distributions.
Using Mandriva 2007 Spring, kernel 2.6.17-13mdv (ftdi_sio built-in).

What I have done until now:

- cp libftd2xx.so.0.4.12 /usr/local/lib
- ln -s libftd2xx.so.0.4.12 /usr/local/lib/libftd2xx.so
- ln -s libftd2xx.so.0.4.12 /usr/lib/libftd2xx.so
- ln -s libftd2xx.so.0.4.12 /usr/local/lib/libftd2xx.so.0
- ln -s libftd2xx.so.0.4.12 /usr/lib/libftd2xx.so.0
- Add the following line to /etc/fstab:
none /proc/bus/usb usbfs defaults,mode=0666 0 0 (devmode=0666 does not work
either)
- mount -a
- connected the device to usb port
- with lsusb I can visualize the device connected and when listing
/proc/bus/usb/devices, It recognizes the device with
VID/PID/Serial/Description fields all OK! but no driver!? => Driver=(none)
- Finally run the test program, with the following FTD2XX calls:

    DWORD *numDevs;
    FT_STATUS ftStatus = FT_SetVIDPID(VID, PID);
    if (ftStatus != FT_OK)
    {
        return ftStatus;
    }
    ftStatus=AQUSB_INVALID_PARAMETER;
    ftStatus=FT_ListDevices(numDevs,NULL,FT_LIST_NUMBER_ONLY);
    if (ftStatus != FT_OK)
    {
        return ftStatus;    }
    return numDevs;

- This returns 0 devices!

- Researching the system, I could notice that modprobe.alias and
modprobe.usbmap sets driver for PID/VID. So I set PID/VID pointing to
  ftdi_sio also.

- running again the test program, the same error! And still, the driver is
not recognized in /proc/bus/usb/devices.

PS: The device is externally powered (not through USB).

Any tips?

[Ftdi-usb-sio-devel] Setting non-standard baud rates

From: Derek S. <ds...@cs...> - 2007-05-08 19:54:47

Hi,

I have a device with a FT232 USB-serial converter that requires a 
non-standard baud rate of 250kbaud.  I am able to open the device and 
configure it using standard baud rates, but have not been successful in 
configuring it for the required 250kbaud.

The project webpage (http://ftdi-usb-sio.sourceforge.net/) indicates there 
are ways to set non-standard baudrates, but none of them have worked for 
me.  The approaches listed and the problems I have encountered are as 
follows:

The first suggestion is to "set tty->termios->c_cflag speed to B38400 and 
then set your real speed in tty->alt_speed".  I have not been able find a 
way to access to the tty structure (tty_struct) to set the "alt_speed" 
member variable.  I found references to a TIOCTTYGSTRUCT ioctl to retrieve 
a pointer to the tty_struct, but the #define for this is now commented out 
in /usr/include/asm/ioctls.h and a comment indicates it is for debugging 
only.  I found a reference in the Linux kernel archives suggesting that 
this ioctl was to be removed.  Also, I have not been able to find the 
header file for "tty_struct" in /usr/include/linux (the kernel source has 
it in a file called "tty.h").  Is there another way to set "alt_speed"?

The second suggestion is to set a custom divisor in the termios structure. 
However, there is no integer divisor that gives me the required baud rate
(even with the various different baud_base settings of HI, VHI, SHI, or 
WARP).

The only other solutions seem cheesy: recompile the driver with the 
custom buad rate coded in, or perhaps change the crystal frequency in the 
attached device so that it scales to a standard baud rate...

Any suggestions would be appreciated.  If there is no elegant way to set 
non-standard baud rates, could one be added?

thanks,
Derek

Re: [Ftdi-usb-sio-devel] stick parity

From: Bill R. <bil...@gm...> - 2007-04-02 19:37:40

HI All,

You should be able to submit your patch directly to the
linux-usb-development list.

You should be able to see the details at:

http://ftdi-usb-sio.sourceforge.net/

send the patch to mailto:lin...@li...

If you like directly send me an email and I'll at least make sure it doesn't
break anything obvious.

I don't actively maintain the driver anymore but I dabble every so often.

On 4/3/07, Allen, Matthew <al...@ul...> wrote:
>
> I'm not sure anyone is actually doing anything with the driver at this
> point. I've seen no real traffic across this list since I joined. Just
> questions that are unanswered.
>
> Is anyone actually maintaining the driver anymore?
>
>
>

Re: [Ftdi-usb-sio-devel] stick parity

From: Allen, M. <al...@ul...> - 2007-04-02 12:51:56

I'm not sure anyone is actually doing anything with the driver at this
point. I've seen no real traffic across this list since I joined. Just
questions that are unanswered.

Is anyone actually maintaining the driver anymore?

-----Original Message-----
From: ftd...@li...
[mailto:ftd...@li...] On Behalf Of
r.k...@ya...
Sent: Saturday, March 31, 2007 7:52 PM
To: ftd...@li...
Subject: [Ftdi-usb-sio-devel] stick parity

hi,

I noticed that this driver (as unfortunately nearly all
usb-serial-drivers) does not support mark/space parity, although
the chip supports it. And in 2003, someone already posted a patch on
this mailinglist to add this feature.
(http://sourceforge.net/mailarchive/message.php?msg_id=3D20030619095616.G=
B
26200%40ased.x.cce.cz)

Is there any reason, why this patch wasn't added?

regards,
Roland Koebler


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[Ftdi-usb-sio-devel] Bug in ftdi_sio driver. Re: low_latency flag for ftdi_sio

From: Boris Z. <bs_...@ya...> - 2007-04-01 13:50:00

Hello,

Well I've found how I could possibly reduce 
latency: writing to latency_timer file under sysfs.
BUT reading/writing this file crashes the kernel. It
happens because these lines

struct usb_serial_port *port = to_usb_serial_port(dev);
struct ftdi_private *priv = usb_get_serial_port_data(port);

in all sysfs attribute callbacks produce wrong pointer to
usb_serial_port, because "struct device" pointer passed to
device_create_file in "create_sysfs_attrs" doesn't points
to "struct device" embedded in usb_serial_port.(In my case
above "priv" pointer turned out to be NULL and was trapped
by kernel producing Oops, but kernel could crash even
earlier while dereferencing "port" pointer). This happens
with FC6's kernel 2.6.20.

best regards,
Boris 



Boris Zingerman <bs_...@ya...> wrote: Hello,

I have some device that uses ftdi chip
to communicate with host computer. I set
low latency flag in this manner

struct serial_struct serial_info;
ioctl(m_fd, TIOCGSERIAL, &serial_info)  ;
serial_info.flags |= ASYNC_LOW_LATENCY;
ioctl(m_fd, TIOCSSERIAL, &serial_info) ;

setserial reports that low_latency flag is
indeed set, but round-trip time for short commands
is about 15 msec. This device has also regular RS232
input and the same code produces 1.5msec 
roundtrip time for the same commands (ten times
faster !!). Is low_latency flag has no effect on ftdi_sio
driver ? If so how can I improve latency.

Best regards,
Boris Zingerman

   

---------------------------------
Bored stiff? Loosen up...
Download and play hundreds of games for free on Yahoo! Games.

 
---------------------------------
8:00? 8:25? 8:40?  Find a flick in no time
 with theYahoo! Search movie showtime shortcut.

[Ftdi-usb-sio-devel] stick parity

From: <r.k...@ya...> - 2007-03-31 23:52:06

hi,

I noticed that this driver (as unfortunately nearly all
usb-serial-drivers) does not support mark/space parity, although
the chip supports it. And in 2003, someone already posted a patch on
this mailinglist to add this feature.
(http://sourceforge.net/mailarchive/message.php?msg_id=20030619095616.GB26200%40ased.x.cce.cz)

Is there any reason, why this patch wasn't added?

regards,
Roland Koebler

[Ftdi-usb-sio-devel] low_latency flag for ftdi_sio

From: Boris Z. <bs_...@ya...> - 2007-03-29 17:14:50

Hello,

I have some device that uses ftdi chip
to communicate with host computer. I set
low latency flag in this manner

struct serial_struct serial_info;
ioctl(m_fd, TIOCGSERIAL, &serial_info)  ;
serial_info.flags |= ASYNC_LOW_LATENCY;
ioctl(m_fd, TIOCSSERIAL, &serial_info) ;

setserial reports that low_latency flag is
indeed set, but round-trip time for short commands
is about 15 msec. This device has also regular RS232
input and the same code produces 1.5msec 
roundtrip time for the same commands (ten times
faster !!). Is low_latency flag has no effect on ftdi_sio
driver ? If so how can I improve latency.

Best regards,
Boris Zingerman


 
---------------------------------
Bored stiff? Loosen up...
Download and play hundreds of games for free on Yahoo! Games.

[Ftdi-usb-sio-devel] FTDI Serial Driver Question

From: Edward D. <Ed....@no...> - 2007-03-15 13:24:07

Attachments: ed.dumas.vcf

Hello,

I work for NOAA (National Oceanic and Atmospheric Administration) in Oak
Ridge, TN and we've got a multi-port serial device (ByteRunner
USB-8COMi-RM-120V) URL:

http://www.byterunner.com/byterunner/product=name:USB-8COMi/title=USB+to+8+Port+Serial+Adapters+(RS422,+RS485)

with the FTDI chipset running with the latest version of Fedora Core 6.
I don't know the exact kernel, but it is at least 2.6.16. We have been
having a few problems about which I would like to ask your opinion.

I'll start by outlining the serial loading of each serial port and
describing the problems we are having, followed by some questions.
Hopefully you can give some insight as to what might be going on.

Below are the devices and a description of the amount of serial data and
the timing of the data we receive:

Device 1 - 35 bytes every 20 ms, baud rate 460800, RS-422
Device 2 - 35 bytes every 20 ms, baud rate 460800, RS-422
Device 3 - 26 bytes every 50 ms, baud rate 115200, RS-232
Device 4 - 12 bytes every 20 ms, baud rate 19200, RS-232
Device 5 - 36 bytes every 50 ms, baud rate 9600, RS-232
Device 6 - 318 bytes every 100 ms, baud rate 115200, RS-232
Device 7 - 238 bytes at 00 ms, 168 bytes every 100 ms until next even
second, baud rate 115200, RS-232
Device 8 - 56 bytes every 100 ms, baud rate 115200, RS-232

Here is another look at the sum total of the data, as a function of time:

00 ms - 756 bytes
20 ms - 82 bytes
40 ms - 82 bytes
50 ms - 62 bytes
60 ms - 82 bytes
80 ms - 82 bytes
100 ms - 682 bytes
120 ms - 82 bytes
140 ms - 82 bytes
150 ms - 62 bytes
160 ms - 82 bytes
180 ms - 82 bytes
200 ms - 682 bytes

... and the pattern repeats until the next even second, when the 756
byte burst comes again.

I have written c-code to gather data from each device and print it to
the screen as a test to see if things are working. The devices are
tested individually with separate test programs and once everything is
working I run a multi-threaded program to simultaneously collect data
from each device and store it to a common data file. I am using an
intermediate serial library (SIO from Tim Hudson,
http://svn.gnumonks.org/branches/scez-ng/sio/) to provide linkage
between the serial drivers and my application code. One other key point
is that the traffic is all one-way, receive only. I don't send any data
to these devices so the computer just sits back and listens to each
device and archives data.

Now for the problems... The test code for the first 5 devices works
fine when plugged into the USB serial ports. But devices 6, 7, and 8
fail intermittently when plugged into the USB serial ports. In the case
of device 7, data flow is fine for several seconds, followed by fairly
regular checksum errors, then the program terminates with a segmentation
fault error. I can plug the same device into the built-in serial port
on the computer (/dev/ttyS0) and the test code runs flawlessly, without
the CRC errors or the segmentation fault. I get very lethargic
performance with device 8 when it is plugged into the USB serial ports
(but at least no segmentation fault!), but flawless performance when
plugged into the built-in serial port (again, same test code in both
cases).

My questions: Are there any differences between the drivers for the
"built-in" serial port (/dev/ttyS0) and the FTDI USB devices? I'm
thinking about buffer sizes in particular. Also, are there any "tweaks"
I can do to the buffer sizes for the USB FTDI driver that might help my
particular situation? I'm thinking about handling the serial burst
loads that will appear every second and 1/10 second when the full system
is up and running.

I also noticed some flags in the FTDI serial structure regarding
throttling and non-throttling of serial ports. Could there be anything
there that might degrade (or improve?) performance?

I'm not sure whether the USB interface for this device is 1.0, 1.1, or
2.0, or whether it would make a difference. At this point, any
suggestions would be appreciated!

Thank you for your time and for developing the FTDI serial drivers!

Best regards,

Ed Dumas
NOAA/ATDD

[Ftdi-usb-sio-devel] Using status bytes from FTDI devices

From: Craig V. D. <cr...@yo...> - 2007-02-09 22:59:44

I am using ftdi_sio with a DLP-2232PB-G protoboard that uses an FT2232C chip.  
The protoboard includes a PIC16F877A processor with which I am communicating.

When I first tried using ftdi_sio, the responses from the device never reached 
my application code.  read() just hung.  I traced the problem down to the 
fact that the protoboard responses did not terminate with newline characters 
and therefore the buffer transfer from kernel to application was not made.  

All responses are preceded by a pair of status bytes, the second of which is 
identified in ftdi_sio.h as:

 * Byte 1: Line Status
 *
 * Offset       Description
 * B0   Data Ready (DR)
 * B1   Overrun Error (OE)
 * B2   Parity Error (PE)
 * B3   Framing Error (FE)
 * B4   Break Interrupt (BI)
 * B5   Transmitter Holding Register (THRE)
 * B6   Transmitter Empty (TEMT)
 * B7   Error in RCVR FIFO
 *
 */
#define FTDI_RS0_CTS    (1 << 4)
#define FTDI_RS0_DSR    (1 << 5)
#define FTDI_RS0_RI     (1 << 6)
#define FTDI_RS0_RLSD   (1 << 7)

#define FTDI_RS_DR  1
#define FTDI_RS_OE (1<<1)
#define FTDI_RS_PE (1<<2)
#define FTDI_RS_FE (1<<3)
#define FTDI_RS_BI (1<<4)
#define FTDI_RS_THRE (1<<5)
#define FTDI_RS_TEMT (1<<6)
#define FTDI_RS_FIFO  (1<<7)

I solved my problem by using the FTDI_RS_TEMT bit to tell me if the received 
data was complete.  If it was complete and did not already end in a 0x0A, I 
added a 0x0A to the data stream as it was processed by ftdi_process_read() in 
ftdi_sio.c. (Are there some devices that end with just a 0x0D?)

The fix is shown here:
http://yosemitefoothills.com/Electronics/ftdi_sio.c_fix.html

Obviously, one can insist that all devices end their messages with a newline 
character, but that seems to be completely redundant to the status bytes that 
already precede the line.  The newline character therefore would reduce 
throughput without adding anything new.

With all that background, I am asking:

Is my fix is reasonable to apply to the ftdi_sio code?
Will any other devices benefit from it?
Will it cause trouble for any FTDI-based devices?

This may be related to the parity error problem mentioned in the lines 
following my fix.  Maybe that can also be solved now.

Craig

Re: [Ftdi-usb-sio-devel] New FTDI driver for a FT232R module.

From: Allen, M. <al...@ul...> - 2007-02-09 14:56:08

Me from my normal work email:

I've narrowed down what the problem is. When I modprobe ftdi_sio with
"vendor=3D0x16ff and PID=3D0x0080"(which are the correct VID and PID for =
our
new device) it works just fine. So it seems that something is going
wrong with the probing or the hand off with the serial subsystem.

-----Original Message-----
From: ftd...@li...
[mailto:ftd...@li...] On Behalf Of
Matt Allen
Sent: Thursday, February 08, 2007 4:45 PM
To: ftd...@li...
Subject: [Ftdi-usb-sio-devel] New FTDI driver for a FT232R module.

Hello, I've recently been hired to work on a "custom"
driver for a USB-Serial device that we have here. The
device is using the TTL-232R USB - TTL Level Serial
converter with the FT232RQ chipset.

We're using linux 2.6.16 for the development platform.
We've got our own VID and PID but I'm having problems
adapting the FTDI_SIO drivers found in the 2.6.16
kernel to work. When I plug in the new serial device
it seems like the USB subsystem gets the device and it
never gets moved up to the usb-serial or to even
further up the FTDI driver.

The last messages in /var/log/messages that I'm
getting are:

Feb  8 16:06:24 r88882-pos02 kernel: usb 6-1: new full
speed USB device using uhci_hcd and address 7

Feb  8 16:06:24 r88882-pos02 kernel: usb 6-1: new
device found, idVendor=3D16ff, idProduct=3D0080

Feb  8 16:06:24 r88882-pos02 kernel: usb 6-1: new
device strings: Mfr=3D1, Product=3D2, SerialNumber=3D3

Feb  8 16:06:24 r88882-pos02 kernel: usb 6-1: Product:
UTC PD1200

Feb  8 16:06:24 r88882-pos02 kernel: usb 6-1:
Manufacturer: UTC

Feb  8 16:06:24 r88882-pos02 kernel: usb 6-1:
SerialNumber: 000001

Feb  8 16:06:24 r88882-pos02 kernel: usb 6-1:
configuration #1 chosen from 1 choice

I figure that it should mention something about
usb-serial or the ftdi_sio modules but nothing. I
checked to make sure they had been insmod'ed and the
drivers are loaded.



=20
________________________________________________________________________
____________
Looking for earth-friendly autos?=20
Browse Top Cars by "Green Rating" at Yahoo! Autos' Green Center.
http://autos.yahoo.com/green_center/

------------------------------------------------------------------------
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_______________________________________________
Ftdi-usb-sio-devel mailing list
Ftd...@li...
https://lists.sourceforge.net/lists/listinfo/ftdi-usb-sio-devel

[Ftdi-usb-sio-devel] Test...

From: Allen, M. <al...@ul...> - 2007-02-09 14:43:22

Testing email. I was getting bounced before.

[Ftdi-usb-sio-devel] New FTDI driver for a FT232R module.

From: Matt A. <thr...@ya...> - 2007-02-08 21:45:34

Hello, Ive recently been hired to work on a custom
driver for a USB-Serial device that we have here. The
device is using the TTL-232R USB  TTL Level Serial
converter with the FT232RQ chipset.

Were using linux 2.6.16 for the development platform.
Weve got our own VID and PID but Im having problems
adapting the FTDI_SIO drivers found in the 2.6.16
kernel to work. When I plug in the new serial device
it seems like the USB subsystem gets the device and it
never gets moved up to the usb-serial or to even
further up the FTDI driver.

The last messages in /var/log/messages that Im
getting are:

Feb  8 16:06:24 r88882-pos02 kernel: usb 6-1: new full
speed USB device using uhci_hcd and address 7

Feb  8 16:06:24 r88882-pos02 kernel: usb 6-1: new
device found, idVendor=16ff, idProduct=0080

Feb  8 16:06:24 r88882-pos02 kernel: usb 6-1: new
device strings: Mfr=1, Product=2, SerialNumber=3

Feb  8 16:06:24 r88882-pos02 kernel: usb 6-1: Product:
UTC PD1200

Feb  8 16:06:24 r88882-pos02 kernel: usb 6-1:
Manufacturer: UTC

Feb  8 16:06:24 r88882-pos02 kernel: usb 6-1:
SerialNumber: 000001

Feb  8 16:06:24 r88882-pos02 kernel: usb 6-1:
configuration #1 chosen from 1 choice

I figure that it should mention something about
usb-serial or the ftdi_sio modules but nothing. I
checked to make sure they had been insmoded and the
drivers are loaded.



 
____________________________________________________________________________________
Looking for earth-friendly autos? 
Browse Top Cars by "Green Rating" at Yahoo! Autos' Green Center.
http://autos.yahoo.com/green_center/

[Ftdi-usb-sio-devel] =?windows-1251?b?ziDs5ebk8+3g8O7k7fv1IPHy?= =?windows-1251?b?4O3k4PDy4PUg4fP14+Dr8uXw8eru4+4g8/fl8uAg6CD06O3g?= =?windows-1251?b?7fHu4u7pIO7y9+Xy7e7x8ugu?=

From: <eb...@be...> - 2007-01-13 10:31:13

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=20
(495) 235 58  88, 235 12 35&nbsp;</TD></TR></TBODY></TABLE>
<P><FONT color=3d#EAFFEA>lVpCe</P></FONT></DIV></BODY></HTML>

[Ftdi-usb-sio-devel] questions about ftdi_sio.c:update_mctrl()

From: Leisner, M. <Mar...@xe...> - 2007-01-11 18:42:13

I was looking at ftdi_sio in 2.6.10 -- and I noticed something I didn't
understand -- so I
looked in 2.6.18.2 and it was also there (but a little of the structure
changed).

Why do we kmalloc/kfree 1 byte...it seems it wouldn't be used in
usb_control_msg since
the size is 0...

So why don't we just do:
	NULL, 0
instead of
      buf, 0



static int update_mctrl(struct usb_serial_port *port, unsigned int set,
unsigned int clear)
{
        struct ftdi_private *priv =3D usb_get_serial_port_data(port);
        char *buf;
        unsigned urb_value;
        int rv;

        if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) =3D=3D 0) {
                dbg("%s - DTR|RTS not being set|cleared", __FUNCTION__);
                return 0;       /* no change */
        }

        buf =3D kmalloc(1, GFP_NOIO);
        if (!buf) {
                return -ENOMEM;
        }
....

        rv =3D usb_control_msg(port->serial->dev,
                               usb_sndctrlpipe(port->serial->dev, 0),
                               FTDI_SIO_SET_MODEM_CTRL_REQUEST,
                               FTDI_SIO_SET_MODEM_CTRL_REQUEST_TYPE,
                               urb_value, priv->interface,
                               buf, 0, WDR_TIMEOUT);

        kfree(buf);


marty

[Ftdi-usb-sio-devel] Happy NW Savannah

From: Savannah S. <xenophobia'<sbl...@ac...> - 2006-12-29 03:26:41

	 An Alternative Energy Company ready to Blast off!!!
	
Company:  AlgoDyne Ethonol Energy Inc.  (ADYN)
	
Current Price:               $1.3
Short Term Target:       $3.50
Long Term Projected    $10.00
	
	 Alternative energy is a Red Hot sector right now and ADYN is a pioneer!  
Check the news and you will see that at this very moment they are in 
negotiations with major Asian investors.  They are also in negotiations for 
partnerships for development of their amazing technology.
	
	Get in now while most investors are taking time off for the holidays!  
After the new year this one will be of the charts!

[Ftdi-usb-sio-devel] El Antivirus del Grupo Pelayo ha borrado el correo

From: InterScan M. N. <pos...@in...> - 2006-12-28 10:01:32

Su correo ha sido borrado por el Antivirus del Grupo PELAYO.
Antivirus Filter . 
Revise su equipo. 
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[Ftdi-usb-sio-devel] Using FTDI with a 2.4.21 Timesys kernel

From: lanas <la...@se...> - 2006-12-19 13:01:04

Hello,

I'm trying to use a FTDI device with a 2.4.21 Timesys
(has real-time extensions) kernel. The kernel has support for the
device, so I enabled it. I tried both as modules (usbserial and
ftdi_sio) and as built-in in the kernel.

I short, the same problem always arises: when connecting the USB
device, a never-ending cycle is going on of connects and disconnects,
like this:

(module version)

hub.c: new USB device 00:1d.1-1, assigned address 2
usbserial.c: FTDI FT232BM Compatible converter detected
usbserial.c: FTDI FT232BM Compatible converter now attached to ttyUSB0 (or usb/tts/0 for devfs) usb.c: USB disconnect on device 00:1d.1-1
address 2 usbserial.c: FTDI FT232BM Compatible converter now disconnected from ttyUSB0 hub.c: new USB device 00:1d.1-1, assigned

address 3 usbserial.c: FTDI FT232BM Compatible converter detected
usbserial.c: FTDI FT232BM Compatible converter now attached to ttyUSB0 (or usb/tts/0 for devfs) usb.c: USB disconnect on device 00:1d.1-1
address 3 usbserial.c: FTDI FT232BM Compatible converter now disconnected from ttyUSB0 hub.c: new USB device 00:1d.1-1, assigned

address 4 usbserial.c: FTDI FT232BM Compatible converter detected
usbserial.c: FTDI FT232BM Compatible converter now attached to ttyUSB0 (or usb/tts/0 for devfs) usb.c: USB disconnect on device 00:1d.1-1
address 4 usbserial.c: FTDI FT232BM Compatible converter now disconnected from ttyUSB0 hub.c: new USB device 00:1d.1-1, assigned

(built-in kernel version)

Dec 18 12:59:18 localhost kernel:
usb.c: USB device 82 (vend/prod 0x403/0x6001) is not claimed by any active driver.

Dec 18 12:59:18 localhost kernel: usb.c: USB disconnect on device 00:1d.0-2 address 82

Dec 18 12:59:19 localhost kernel: hub.c: new USB device 00:1d.0-2, assigned address 83

Dec 18 12:59:19 localhost kernel: usb.c: USB device 83 (vend/prod 0x403/0x6001) is not claimed by any active driver.

Dec 18 12:59:19 localhost kernel: usb.c: USB disconnect on device 00:1d.0-2 address 83

Dec 18 12:59:20 localhost kernel: hub.c: new USB device 00:1d.0-2, assigned address 84

Dec 18 12:59:20 localhost kernel: usb.c: USB device 84 (vend/prod 0x403/0x6001) is not claimed by any active driver.

Dec 18 12:59:21 localhost kernel: usb.c: USB disconnect on device 00:1d.0-2 address 84
Dec 18 12:59:22 localhost kernel: hub.c: new USB device 00:1d.0-2, assigned address 85

So on so forth. It never stops. When I try this with SuSE 10.0 (2.6.something kernel) everything works fine. Problem is, the device that has to use the FTDI runs the 2.4.21 kernel and this kernel cannot be changed at the moment. It can be patched, but not totally upgraded.

If anyone has a solution to make FTDI work in this case it would be greatly appreciated.

Any suggestions, idea, hint, etc... appreciated.

Thanks,
Al

[Ftdi-usb-sio-devel] FTDI driver for Fedora Core 6

From: Roman L. <rla...@br...> - 2006-12-15 20:32:39

I have a Sony Vaio Laptop that does not come with a physical serial
port.   I would like to install a USB to Serial converter using a
DLP-USB232M-G adapter from Dlpdesign?
=20
Is there a FTDI driver for the above USB to serial converter that runs
on Fedora Core 6?
=20
Thanks,
=20
--Roman

[Ftdi-usb-sio-devel] FREE Analysis & FREE Ranking Report

From: <rou...@i-...> - 2006-12-13 23:08:28

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