On Thu, Nov 17, 2016 at 1:26 AM, Geoff Roddick <geoff...@gmail.com> wrote: > Hi, > > I'm have been unable to access the 2nd, 3rd or 4th port of the FTDI FT4232H. > I can successfully bit bang or use SPI on Port A. > > I thought changing the interface would work, but both 0 and 1 access Port A > and 2 gives me > GpioException: Unable to open USB port: No such FTDI port: 2 > > Can someone point me in the right direction?
Hi, I nearly miss your email as I do not follow pyusb ML on a regular basis. Which version of pyftdi are you using ? There have been some bugs and confusions between interface and index in some previous releases of pyftdi. Interface 0 and 1 match the same interface: Port A (for legacy reasons) Interface 2 matches port B Interface 3 and 4 match port C and D, but these ports are only UART/GPIO, not MPSSE-enabled so you will not be able to use SPI on these ones. The new release of PyFTDI (0.20.x) should be easier to use, and will support URL to open a port, such as "ftdi://ftdi:4232/1”. It also support FTDI device identification with “ftdi:///?” URL. You may want to have a look at pyspiflash that provides a (hopefully working :-)) example of using SPI to access SPI data flash devices. Feel free to open a ticket on github (eblot/pyftdi), as this ML is dedicated to pyusb, not pyftdi. HTH, Manu. ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ pyusb-users mailing list pyusb-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/pyusb-users
