On Sat, Jul 31, 2010 at 5:11 PM, <olof.tang...@telia.com> wrote: > When I plug in the JTAG interface it is recoginized as 2 instances of > LibUSB-Win32 Devices in the device mangager. The drivers are working > properly according to the dialog boxes. The > LED on the USB interface is not lit however. The LPC-H2148 is powered > from its USB interface and is recognized > as a CDC ACM port. > > I then try to run OpenOCD the following happens: > > Error: couldn't read enough bytes from FT2232 device (0 < 81) > Error: couldn't read from FT2232 > Error: couldn't read enough bytes from FT2232 device (0 < 81) > Error: couldn't read from FT2232 > Command handler execution failed > Warn : jtag initialization failed; try 'jtag init' again.
>From what I read in the libftdi mailing list this is a problem with libftdi. First solution, you may want to try out libftdi-0.18, You need to replace the libftdi-0.17 dll inside Freddie's package (C:\Program Files\OpenOCD\0.4.0\libftdi.dll) with the 0.18 dll. I have the 0.18 binary download here (for 32bit Windows). I am not so positive if this helps, but no harm trying. http://picusb.googlecode.com/files/libftdi-0.18_mingw32.zip Second solution, switching to libftdi-1.0 will probably solve the problem. To use libftdi-1.0 with OpenOCD, you need to do two things. 1) Switch the driver to WinUSB, you can do that easily with Zadig and libusb-1.0 Windows binary snapshots. http://www.libusb.org/wiki/windows_backend http://libusb-winusb-wip.googlecode.com/files/zadig.exe http://libusb-winusb-wip.googlecode.com/files/libusb_2010.07.31.7z 2) Get libftdi-1.0 binary from here. http://picusb.googlecode.com/files/libftdi1_05July2010.zip Replace libftdi.dll with the dll inside the above zip file. Replace libusb0.dll from Freddie's package with the libusb-1.0.dll inside the libusb_2010.07.31.7z package. -- Xiaofan _______________________________________________ Openocd-development mailing list Openocd-development@lists.berlios.de https://lists.berlios.de/mailman/listinfo/openocd-development
