some question about communicating the usb RAW device

[逍遥浪子]

I have some question about USB communication: I want to make my VI communicate

TI-DSP by USB, now, the driver of USB on DSP have done, and  there are a test

program writen by VC and a driver fold(with a .inf and a .sys files), when I

install the driver and run the test program, the driver program on DSP run

regularly. And then I want to program a VI which have the same function as the

test program, so I unload the driver on PC firstly, then install the DSP in

NI_VISA according to "Using NI-VISA 3_0 to Control Your USB Device - Tutorial -

Instrument Drivers". When I sent the standard control request using the VISA test panel, the status below happened. I don't know what wrong with my step.

Dev  Phase  Data                       Info           Time   Cmd.Phase.Ofs    
---  -----  -------------------------  -------------  -----  ------------------
 15  CTL    80 06 03 00 - 00 00 04 00  GET DESCRIPTR  5.2sc        56.1.0       
 14  CTL    80 06 03 00 - 00 00 04 00  GET DESCRIPTR   11us        57.1.0       
 14  USTS   00 00 01 c0                canceled       2.0sc        57.2.0       
 15  USTS   00 00 01 c0                canceled         5us        56.2.0 
PS: the software I use to capture the data is BUSHOUND

1、Do I have to install the .sys driver file in VISA? How can I install the driver file without losing the device in MAX?

2、Someone told me it must be done by calling .dll fies in LV, but I want to know if LV can program the function directly without calling .dll file?

Thank for any reply~~!

[rolfk]

---

逍遥浪子 wrote:

I have some question about USB communication: I want to make my VI communicate

TI-DSP by USB, now, the driver of USB on DSP have done, and  there are a test

program writen by VC and a driver fold(with a .inf and a .sys files), when I

install the driver and run the test program, the driver program on DSP run

regularly. And then I want to program a VI which have the same function as the

test program, so I unload the driver on PC firstly, then install the DSP in

NI_VISA according to "Using NI-VISA 3_0 to Control Your USB Device - Tutorial -

Instrument Drivers". When I sent the standard control request using the VISA test panel, the status below happened. I don't know what wrong with my step.

Dev  Phase  Data                       Info           Time   Cmd.Phase.Ofs     ---  -----  -------------------------  -------------  -----  ------------------  15  CTL    80 06 03 00 - 00 00 04 00  GET DESCRIPTR  5.2sc        56.1.0         14  CTL    80 06 03 00 - 00 00 04 00  GET DESCRIPTR   11us        57.1.0         14  USTS   00 00 01 c0                canceled       2.0sc        57.2.0         15  USTS   00 00 01 c0                canceled         5us        56.2.0  PS: the software I use to capture the data is BUSHOUND

1、Do I have to install the .sys driver file in VISA? How can I install the driver file without losing the device in MAX?

2、 Someone told me it must be done by calling .dll fies in LV, but I want to know if LV can program the function directly without calling .dll file?

---

This thread contains already a related answer and explains what a sys driver is. While you could theoretically use the Call Library Node to call all the necessary Win32 API kernel functions to connect to a device driver, this would be very cumbersome and not doable without a real good understanding about C programming. Writing an interface DLL instead won't need more C programming knowledge at all but will give you a clean interface to that device driver which eventually could be used in other programming environments as well.

Rolf Kalbermatter