That sounds correct, from my experience with the Open Lighting Architecture ftdi driver you need a separate context for each port (I modified it to support a 4-port single FTDI device), so devices would definitely need their individual context.
HTH, Eli 2016-06-01 18:50 GMT+03:00 Ales Fiala <[email protected]>: > I am trying to understand how to open and use multiple FTDI devices in the > same program. > > I am using *ftdi_usb_find_all()* to enumerate the devices and then > *ftdi_usb_open_dev()* to open each one and identify it. Afterwards I > close each device. I do this part with just one ftdi_context. > > Now that I found all the devices I want to open each selected device and > keep it open for reading and writing. I notice that *ftdi_context* > contains the following: > > - libusb_device_handle > - readbuffer > - eeprom > > All this makes me believe that I need a separate *ftdi_context* for each > device that I want to access. Am I on the right track? > > Using the *ftdi_device_list* that I found above I want to create a new > context for each device and open it. > I tried doing > > ftdi_new(); > ftdi_usb_open_dev(); > > for each device using the old device list. But I get a SIGSEGV somewhere > in the depths of usb_open() in libusb. I am thinking it is because I used a > device list created with one context and now am trying to open the same > device using a different context. > > So how do I accomplish what I want? Any advice would be appreciated. > > Regards > > Ales Fiala > > > > ------------------------------ > > *libftdi* - see http://www.intra2net.com/en/developer/libftdi for details. > To unsubscribe send a mail to [email protected] > > -- libftdi - see http://www.intra2net.com/en/developer/libftdi for details. To unsubscribe send a mail to [email protected]
