Hi All,
We are right now running a project which need high speed usbserial
controller. We are evaluating ft2232H chip with running several programs
from the package libftdi1git_devkit_mingw64 Xiaofeng provided on
Linux(Ubuntu 12.04) and Windows 7(64bits). Linux is totally fine and
running very smoothly. However, We got several problems on Windows 7(64
bits):
1. Loopback tests:
We connect port A to port B of controller to do loopback test.
We ran below program for writing in one terminal
E:\downloads\libftdi1git_devkit_mingw64\bin64>serial_test.exe -v0x403
-p0x6010 -i1 -w12
However, when we ran below program in another terminal for reading , we
always got below error
E:\downloads\libftdi1git_devkit_mingw64\bin64>serial_test.exe -v0x403
-p0x6010 -
i2
unable to open ftdi device: -4 (usb_open() failed)
2. Then we did second test with two ft2232h connect with each other through
port (interface) 2.
We ran below program in one PC(windows 7)
E:\downloads\libftdi1git_devkit_mingw64\bin64>serial_test.exe -v0x403
-p0x6010 -i2 -w12
and ran another program in another PC(windows)
E:\downloads\libftdi1git_devkit_mingw64\bin64>serial_test.exe -v0x403
-p0x6010 -i2
We can tell that data was written into port 2 of one controller through
SysNucleus USBTrace tool.
But we never receive any data from port 2 of controller in another PC.
3. The reason why I know the serial_test works on Linux because I can see
print out from serial_test.Here are command I ran on Linux
1. ./serial_test -v0x403 -p0x6010 -i1 -w12 //write 0x0C into buffer
2. ./serial_test -v0x403 -p0x6010 -i1 //Read
I can keep on reading the data from read side. I tried on Windows 7 32
bits system today and no lucky to get it works. I was wondering have the
code been tested on windows before?
Appreciate for any of your advice in advance.
Regards,
James
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