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

[Bill R. <bil...@gm...>]

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...
> *ec2 Software Solutions*
> 3035 E. Patrick
> Ste. 1
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> <http://www.ec2software.com/>www.ec2software.com
> <http://www.ec2software.com/>*Follow the rules.* * Exceed the standard**.*
>
>
> Kind Regards,
>
> *Brett Whittacre*
> Vice President
> wh...@ec...
> *ec2 Software Solutions*
> 3035 E. Patrick
> Ste. 1
> Las Vegas, Nevada, 89120
> *P*: 1.866.791.3673 ext 200 | *F:* 1.702.947.7357
> <http://www.ec2software.com>www.ec2software.com
> <http://www.ec2software.com> *Follow the rules.* * Exceed the standard**.*
>
>
>
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