A function named "usb_control_msg"

GNU Radio
1

Dear everyone:
You see in usrp_basic.h there is a function named _write_9862()
and it uses function usrp_9862_write(),defined in usrp_prims_common.h.
And usrp_9862_write() uses function usrp_spi_write(), also defined in
usrp_prims_common.h.
usrp_spi_write() uses function write_cmd(), defined in
usrp_prims_libusb0.c and usrp_prims_libusb1.c.
In usrp_prims_libusb0.c write_cmd() uses a function named
usb_control_msg(). But I can not find where usb_control_msg() is. Can
anyone tell me where it is???

2

2011/11/29 signalswdm [email protected]:

Dear everyone:
You see in usrp_basic.h there is a function named _write_9862() and
ituses functionusrp_9862_write(),defined in usrp_prims_common.h. And
usrp_9862_write() uses function usrp_spi_write(), alsodefined in
usrp_prims_common.h.
usrp_spi_write() uses function write_cmd(), defined in usrp_prims_libusb0.c
and usrp_prims_libusb1.c.
In usrp_prims_libusb0.c write_cmd() uses a function named
usb_control_msg(). But I can not find where usb_control_msg() is. Can anyone
tell me where it is???

libusb:

http://libusb.sourceforge.net/doc/function.usbcontrolmsg.html

Brian

3

2011/11/29 signalswdm [email protected]:

Dear everyone:
You see in usrp_basic.h there is a function named _write_9862() and
ituses functionusrp_9862_write(),defined in usrp_prims_common.h. And
usrp_9862_write() uses function usrp_spi_write(), alsodefined in
usrp_prims_common.h.
usrp_spi_write() uses function write_cmd(), defined in usrp_prims_libusb0.c
and usrp_prims_libusb1.c.
In usrp_prims_libusb0.c write_cmd() uses a function named
usb_control_msg(). But I can not find where usb_control_msg() is. Can anyone
tell me where it is???

It’s part of the legacy API for libusb-0.1.

http://libusb.sourceforge.net/doc/function.usbcontrolmsg.html

Thomas