diff options
author | Josh Blum <josh@joshknows.com> | 2010-06-15 17:54:37 -0700 |
---|---|---|
committer | Josh Blum <josh@joshknows.com> | 2010-06-15 17:54:37 -0700 |
commit | a89d684ba2b81c6e18d348965dffb919edb56fea (patch) | |
tree | eba14f717a227c9ebde668e723fae9c2281f0648 /host/docs/general.rst | |
parent | 25005946ad796c41d3108480eb2b3e39a68f24b2 (diff) | |
parent | ca6417739de4e5344325e96887dcdbf8311e265b (diff) | |
download | uhd-a89d684ba2b81c6e18d348965dffb919edb56fea.tar.gz uhd-a89d684ba2b81c6e18d348965dffb919edb56fea.tar.bz2 uhd-a89d684ba2b81c6e18d348965dffb919edb56fea.zip |
Merge branch 'sched'
Diffstat (limited to 'host/docs/general.rst')
-rw-r--r-- | host/docs/general.rst | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/host/docs/general.rst b/host/docs/general.rst new file mode 100644 index 000000000..7d1f467a0 --- /dev/null +++ b/host/docs/general.rst @@ -0,0 +1,79 @@ +======================================================================== +UHD - General Application Notes +======================================================================== + +.. contents:: Table of Contents + +------------------------------------------------------------------------ +Finding devices +------------------------------------------------------------------------ + +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +Device addressing +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +Deviced are addressed through key/value string pairs. +These string pairs can be used to narrow down the search for a specific device or group of devices. +Most UHD utility applications and examples have a --args parameter that takes a device address; +where the device address is expressed as a delimited string. + +* See the documentation in types/device_addr.hpp for reference. +* See device-specific application notes for usage. + +**Example:** +:: + + serial=0x1234, type=usrpx + +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +Device discovery +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +Devices attached to your system can be discovered using the "uhd_find_devices" program. +The find devices program scans your system for supported devices and prints +out an enumerated list of discovered devices and their addresses. +The list of discovered devices can be narrowed down by specifying device address args. + +**Usage:** +:: + + uhd_find_devices + + -- OR -- + + uhd_find_devices --args <device-specific-address-args> + +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +Device properties +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +Properties of devices attached to your system can be probed with the "uhd_usrp_probe" program. +The usrp probe program contructs an instance of the device and prints out its properties; +properties such as detected daughter-boards, frequency range, gain ranges, etc... + +**Usage:** +:: + + uhd_usrp_probe --args <device-specific-address-args> + +------------------------------------------------------------------------ +Misc notes +------------------------------------------------------------------------ + +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +Process scheduling +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +The UHD will try to automatically boost the process's scheduling priority. +Currently, this is only supported on platforms with *sched.h*. + +When setting the priority fails, the UHD prints out an error. +This error is harmless, it simply means that your process will have a normal scheduling priority. + +**Linux Notes:** + +Non-privileged users need special permission to change the scheduling priority. +Add the following line to */etc/security/limits.conf*: +:: + + @<my_group> - rtprio 99 + +Replace <my_group> with a group to which your user belongs. +Settings will not take effect until the user has logged in and out. |