summaryrefslogtreecommitdiffstats
path: root/host/docs/usrp_e1xx.rst
diff options
context:
space:
mode:
authorJosh Blum <josh@joshknows.com>2011-05-03 16:55:27 -0700
committerJosh Blum <josh@joshknows.com>2011-05-03 16:55:27 -0700
commit4e0b42afcbbf1067cef2ad530f3b162e5a35771b (patch)
tree708547b217482a6404f2c75ad7ab19a69a74dc9e /host/docs/usrp_e1xx.rst
parente75919bc9e1cb1b5f8f69b5a5aabed9b3a1a53d9 (diff)
parentb4fc0d61bb6cbd1a5614745bab9aeb0abc22cb6f (diff)
downloaduhd-4e0b42afcbbf1067cef2ad530f3b162e5a35771b.tar.gz
uhd-4e0b42afcbbf1067cef2ad530f3b162e5a35771b.tar.bz2
uhd-4e0b42afcbbf1067cef2ad530f3b162e5a35771b.zip
Merge branch 'master' into next
Diffstat (limited to 'host/docs/usrp_e1xx.rst')
-rw-r--r--host/docs/usrp_e1xx.rst16
1 files changed, 11 insertions, 5 deletions
diff --git a/host/docs/usrp_e1xx.rst b/host/docs/usrp_e1xx.rst
index 2818a0a65..036d2c02c 100644
--- a/host/docs/usrp_e1xx.rst
+++ b/host/docs/usrp_e1xx.rst
@@ -20,7 +20,6 @@ Example device address string representations to specify non-standard FPGA image
Changing the master clock rate
------------------------------------------------------------------------
The master clock rate of the USRP embedded feeds both the FPGA DSP and the codec chip.
-UHD can dynamically reconfigure the clock rate though the set_master_clock_rate() API call.
Hundreds of rates between 32MHz and 64MHz are available.
A few notable rates are:
@@ -36,8 +35,12 @@ To use the 61.44MHz clock rate, the USRP embedded will require two jumpers to be
* J16 is a two pin header, remove the jumper (or leave it on pin1 only)
* J15 is a three pin header, move the jumper to (pin1, pin2)
-For the correct clock settings, call usrp->set_master_clock_rate(61.44e6)
-before any other parameters are set in your application.
+Then run the following commands to record the setting into the EEPROM:
+::
+
+ cd <install-path>/share/uhd/utils
+ ./usrp_burn_mb_eeprom --key=mcr --val=61.44e6
+
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Set other rates - uses internal VCO
@@ -47,8 +50,11 @@ To use other clock rates, the jumpers will need to be in the default position.
* J16 is a two pin header, move the jumper to (pin1, pin2)
* J15 is a three pin header, move the jumper to (pin2, pin3)
-For the correct clock settings, call usrp->set_master_clock_rate(rate)
-before any other parameters are set in your application.
+Then run the following commands to record the setting into the EEPROM:
+::
+
+ cd <install-path>/share/uhd/utils
+ ./usrp_burn_mb_eeprom --key=mcr --val=<rate>
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Clock rate recovery - unbricking