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| author | Nick Foster <nick@nerdnetworks.org> | 2010-09-30 12:28:29 -0700 |
|---|---|---|
| committer | Nick Foster <nick@nerdnetworks.org> | 2010-09-30 12:28:29 -0700 |
| commit | 6dd502737bcf6e59933be01720672db9a496803b (patch) | |
| tree | 5ab70f1c7cb4f2fdd8b5924b5d7abacbd772c9be /host/docs/usrp1.rst | |
| parent | ed245848df8cc011ae8fe30833ecc28049139db5 (diff) | |
| parent | e4fffed05dda57bb37d693a3a26ea6a903c925f7 (diff) | |
| download | uhd-6dd502737bcf6e59933be01720672db9a496803b.tar.gz uhd-6dd502737bcf6e59933be01720672db9a496803b.tar.bz2 uhd-6dd502737bcf6e59933be01720672db9a496803b.zip | |
Merge branch 'master' of ettus.sourcerepo.com:ettus/uhdpriv into usrp2p
Conflicts:
host/lib/usrp/usrp2/io_impl.cpp
Diffstat (limited to 'host/docs/usrp1.rst')
| -rw-r--r-- | host/docs/usrp1.rst | 35 |
1 files changed, 32 insertions, 3 deletions
diff --git a/host/docs/usrp1.rst b/host/docs/usrp1.rst index 3c1431d30..0baa93a45 100644 --- a/host/docs/usrp1.rst +++ b/host/docs/usrp1.rst @@ -60,6 +60,29 @@ Example device address string representations to specify non-standard firmware a fpga=usrp1_fpga_4rx.rbf, fw=usrp1_fw_custom.ihx +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +Change USB transfer parameters +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +The advanced user may manipulate parameters of the usb bulk transfers +for various reasons, such as lowering latency or increasing buffer size. +By default, the UHD will use values for these parameters +that are known to perform well on a variety of systems. +The following device address parameters can be used to manipulate USB bulk transfers: + +* **recv_xfer_size:** the size of each receive bulk transfer in bytes +* **recv_num_xfers:** the number of simultaneous receive bulk transfers +* **send_xfer_size:** the size of each send bulk transfer in bytes +* **send_num_xfers:** the number of simultaneous send bulk transfers + +Example usage, set the device address markup string to the following: +:: + + serial=12345678, recv_num_xfers=16 + + -- OR -- + + serial=12345678, recv_xfer_size=2048, recv_num_xfers=16 + ------------------------------------------------------------------------ Specifying the subdevice to use ------------------------------------------------------------------------ @@ -100,10 +123,10 @@ OS Specific Notes ------------------------------------------------------------------------ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ -Setup Udev on Linux +Linux - setup udev ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ -On Linux, Udev handles USB plug and unplug events. -The following command creates a Udev rule for the USRP1 +On Linux, udev handles USB plug and unplug events. +The following commands create a udev rule for the USRP1 so that non-root users may access the device: :: @@ -113,3 +136,9 @@ so that non-root users may access the device: sudo mv tmpfile /etc/udev/rules.d/10-usrp.rules sudo udevadm control --reload-rules +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +Windows - install driver +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +On Windows, a driver must be installed the first time the USRP1 is attached to the host computer. +A download link for this driver can be found on the UHD wiki page. +Download and unpack the driver, and direct the Windows driver install wizard to the .inf file. |