Allow setting of non-standard FPGA master clock frequency for USRP1

git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@10193 221aa14e-8319-0410-a670-987f0aec2ac5

1 files changed, 10 insertions, 1 deletions

diff --git a/gr-usrp/src/usrp_base.h b/gr-usrp/src/usrp_base.h
index 83aa699ab..c106739d0 100644
--- a/gr-usrp/src/usrp_base.h
+++ b/gr-usrp/src/usrp_base.h
@@ -98,7 +98,16 @@ public:
   /*!
    * \brief return frequency of master oscillator on USRP
    */
-  long  fpga_master_clock_freq() const;
+  long fpga_master_clock_freq() const;
+
+  /*!
+   * Tell API that the master oscillator on the USRP is operating at a non-standard 
+   * fixed frequency. This is only needed for custom USRP hardware modified to 
+   * operate at a different frequency from the default factory configuration. This
+   * function must be called prior to any other API function.
+   * \param master_clock USRP2 FPGA master clock frequency in Hz (10..64 MHz)
+   */
+  void set_fpga_master_clock_freq (long master_clock);
 
   void set_verbose (bool on);