Re: [Ftdi-usb-sio-devel] Raspberry Pi FDTI Driver issue

SourceForge Headquarters 225 Broadway Suite 1600 San Diego, CA 92101 +1 (858) 422-6466

Great suggestions. I am thinking that it is hardware at this point. I have removed the PI from the cabinet, and now that it is away from the other electronic devices, it is working correctly. I will continue to test. 
Thanks to all that have offered help and suggestions. 

Kind Regards, 

Brett Whittacre 
Vice President 
wh...@ec... 
ec 2 Software Solutions 
3035 E. Patrick 
Ste. 1 
Las Vegas, Nevada, 89120 
P : 1.866.791.3673 ext 200 | F: 1.702.947.7357 
www.ec2software.com 
Follow the rules. Exceed the standard . 

----- On Apr 10, 2015, at 9:13 AM, H McCurdy <hmc...@ya...> wrote: 

> My suggestion is to approach it as a hardware problem, if you haven't already.

> Does the USB->Serial adapter function properly on another Linux box? (Perhaps
> you did that and I missed where you said it.) If possible, did you try a
> different USB->Serial adapter? (Serial UARTS do fail, I've dealt with
> hundreds.)

> Is the garbage character always the same? If your software simply "eats" the
> first character, does it work OK after that? (If so, could be line noise. You
> wouldn't be the only person this ever happened to. I've seen code for embedded
> devices (M68K series microprocessors) that routinely clear unexpected
> characters from the incoming buffer.

> These are just suggestions. Hope they help.

> Hugh

> On Thursday, April 9, 2015 8:52 PM, Bill Ryder <bil...@gm...> wrote:

> Nope - that is pretty strange.

> Can you strace your program on a Pi? We can start by looking at what the system
> calls are returning.

> Alternatively you can load the driver in debug mode and a LOT more detail will
> be dumped in the buffer dmesg uses.

> But ideally start with strace to at least make sure it's the kernel sending you
> that data.

> On Fri, Apr 10, 2015 at 2:22 AM, Brett Whittacre < wh...@ec... > wrote:

>> Here is the Dmseg information about it. I looks to be the right driver to me.
>> Any other ideas of what it might be?

>> [ 3.822917] usbserial: USB Serial support registered for generic
>> [ 3.842095] usbcore: registered new interface driver ftdi_sio
>> [ 3.849420] usbserial: USB Serial support registered for FTDI USB Serial Device
>> [ 3.855792] ftdi_sio 1-1.2:1.0: FTDI USB Serial Device converter detected
>> [ 3.862030] usb 1-1.2: Detected FT232RL
>> [ 3.868149] usb 1-1.2: FTDI USB Serial Device converter now attached to ttyUSB0
>> [ 5.496995] random: nonblocking pool is initialized

>> Kind Regards,

>> Brett Whittacre
>> Vice President
>> wh...@ec...
>> ec 2 Software Solutions
>> 3035 E. Patrick
>> Ste. 1
>> Las Vegas, Nevada, 89120
>> P : 1.866.791.3673 ext 200 | F: 1.702.947.7357
>> www.ec2software.com
>> Follow the rules. Exceed the standard .

>> ----- On Apr 8, 2015, at 5:08 PM, Bill Ryder < bil...@gm... > wrote:

>>> At a guess the Pi isn't loading the right driver.

>>> Do you have the output from dmesg when the FTDI is plugged in?

>>> It should say something about a ftdi_sio device being attached.

>>> On Thu, Apr 9, 2015 at 9:40 AM, Brett Whittacre < wh...@ec... > wrote:

>>>> I am having a very strange issue with serial communication through a fdti FT232
>>>> device. I have created a serial program that communicated with a device. It is
>>>> set to blocking mode. When I run the program on a PC, it works just fine.
>>>> However, when I run the same program on a Raspberry pi 2, it always returns at
>>>> least one character, even though there is nothing on the line at that time. The
>>>> code below works on Ubuntu 14.04 with no issues. I get full blocking using
>>>> either a read of select call.

>>>> I am just wondering if I am doing something wrong on the PI....

>>>> Here is how I am connecting to the port.'

>>>> fd=open(sDev.c_str(), O_RDWR | O_NOCTTY );

>>>> struct termios options;
>>>> tcgetattr(fd, &options);

>>>> cfsetispeed(&options, B115200);
>>>> cfsetospeed(&options, B115200);
>>>> options.c_cflag |= (CLOCAL | CREAD );
>>>> options.c_cflag &= ~CSTOPB; //Set one stop bit
>>>> options.c_cflag &= ~CRTSCTS; //
>>>> options.c_cflag &= ~CSIZE; //Mask the character size bits
>>>> options.c_cflag |= (ICANON);
>>>> options.c_cflag &= ~(IXON| IXOFF |IXANY); //No software flow control
>>>> options.c_cc[VTIME]=0;
>>>> options.c_cc[VMIN]=1;

>>>> tcsetattr(fd, TCSANOW, &options);
>>>> int flags;
>>>> //clear DTR and RTS
>>>> flags &= ~(TIOCM_DTR | TIOCM_RTS);
>>>> ioctl(fd, TIOCMSET, &flags);
>>>> usleep(200);

>>>> //SET DTR
>>>> flags |= TIOCM_DTR;
>>>> ioctl(fd, TIOCMSET, &flags);
>>>> usleep(200);

>>>> //clear DTR
>>>> flags &= ~(TIOCM_DTR);
>>>> ioctl(fd, TIOCMSET, &flags);
>>>> usleep(200);

>>>> Kind Regards,

>>>> Brett Whittacre
>>>> Vice President
>>>> wh...@ec...
>>>> ec 2 Software Solutions
>>>> 3035 E. Patrick
>>>> Ste. 1
>>>> Las Vegas, Nevada, 89120
>>>> P : 1.866.791.3673 ext 200 | F: 1.702.947.7357
>>>> www.ec2software.com
>>>> Follow the rules. Exceed the standard .

>>>> Kind Regards,

>>>> Brett Whittacre
>>>> Vice President
>>>> wh...@ec...
>>>> ec 2 Software Solutions
>>>> 3035 E. Patrick
>>>> Ste. 1
>>>> Las Vegas, Nevada, 89120
>>>> P : 1.866.791.3673 ext 200 | F: 1.702.947.7357
>>>> www.ec2software.com
>>>> Follow the rules. Exceed the standard .

>>>> ------------------------------------------------------------------------------
>>>> BPM Camp - Free Virtual Workshop May 6th at 10am PDT/1PM EDT
>>>> Develop your own process in accordance with the BPMN 2 standard
>>>> Learn Process modeling best practices with Bonita BPM through live exercises
>>>> http://www.bonitasoft.com/be-part-of-it/events/bpm-camp-virtual- event?utm_
>>>> source=Sourceforge_BPM_Camp_5_6_15&utm_medium=email&utm_campaign=VA_SF
>>>> _______________________________________________
>>>> Ftdi-usb-sio-devel mailing list
>>>> Ftd...@li...
>>>> https://lists.sourceforge.net/lists/listinfo/ftdi-usb-sio-devel

> ------------------------------------------------------------------------------
> BPM Camp - Free Virtual Workshop May 6th at 10am PDT/1PM EDT
> Develop your own process in accordance with the BPMN 2 standard
> Learn Process modeling best practices with Bonita BPM through live exercises
> http://www.bonitasoft.com/be-part-of-it/events/bpm-camp-virtual- event?utm_
> source=Sourceforge_BPM_Camp_5_6_15&utm_medium=email&utm_campaign=VA_SF

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