diff options
Diffstat (limited to 'usrp/host/lib')
| -rw-r--r-- | usrp/host/lib/legacy/usrp_basic.cc | 2 | ||||
| -rw-r--r-- | usrp/host/lib/legacy/usrp_basic.h | 13 |
2 files changed, 12 insertions, 3 deletions
diff --git a/usrp/host/lib/legacy/usrp_basic.cc b/usrp/host/lib/legacy/usrp_basic.cc index e63a097ac..883e5ede4 100644 --- a/usrp/host/lib/legacy/usrp_basic.cc +++ b/usrp/host/lib/legacy/usrp_basic.cc @@ -112,7 +112,7 @@ usrp_basic::usrp_basic (int which_board, : d_udh (0), d_usb_data_rate (16000000), // SWAG, see below d_bytes_per_poll ((int) (POLLING_INTERVAL * d_usb_data_rate)), - d_verbose (false), d_db(2) + d_verbose (false), d_fpga_master_clock_freq(64000000), d_db(2) { /* * SWAG: Scientific Wild Ass Guess. diff --git a/usrp/host/lib/legacy/usrp_basic.h b/usrp/host/lib/legacy/usrp_basic.h index c5e3d2824..2caac7b66 100644 --- a/usrp/host/lib/legacy/usrp_basic.h +++ b/usrp/host/lib/legacy/usrp_basic.h @@ -1,4 +1,3 @@ - /* -*- c++ -*- */ /* * Copyright 2003,2004,2008 Free Software Foundation, Inc. @@ -69,6 +68,7 @@ protected: int d_usb_data_rate; // bytes/sec int d_bytes_per_poll; // how often to poll for overruns bool d_verbose; + long d_fpga_master_clock_freq; static const int MAX_REGS = 128; unsigned int d_fpga_shadows[MAX_REGS]; @@ -177,7 +177,16 @@ public: /*! * \brief return frequency of master oscillator on USRP */ - long fpga_master_clock_freq () const { return 64000000; } + long fpga_master_clock_freq () const { return d_fpga_master_clock_freq; } + + /*! + * 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) { d_fpga_master_clock_freq = master_clock; } /*! * \returns usb data rate in bytes/sec |