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| author | Josh Blum <josh@joshknows.com> | 2010-07-07 01:58:30 +0000 |
|---|---|---|
| committer | Josh Blum <josh@joshknows.com> | 2010-07-07 01:58:30 +0000 |
| commit | 89a22c7dd531b1754f2401037a4a5c971139bd97 (patch) | |
| tree | 2d3be7918ec8a1a2bf03b821847836d3b2d4cb40 | |
| parent | 2ff1a854669a0fe5c8029f0c013e38faade6b826 (diff) | |
| download | uhd-89a22c7dd531b1754f2401037a4a5c971139bd97.tar.gz uhd-89a22c7dd531b1754f2401037a4a5c971139bd97.tar.bz2 uhd-89a22c7dd531b1754f2401037a4a5c971139bd97.zip | |
usrp-e: tweaks to clock control logic
| -rw-r--r-- | host/lib/usrp/usrp_e/clock_ctrl.cpp | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/host/lib/usrp/usrp_e/clock_ctrl.cpp b/host/lib/usrp/usrp_e/clock_ctrl.cpp index 0b18763a4..df649cee6 100644 --- a/host/lib/usrp/usrp_e/clock_ctrl.cpp +++ b/host/lib/usrp/usrp_e/clock_ctrl.cpp @@ -43,11 +43,11 @@ static const double ref_clock_rate = 10e6; static const size_t r_counter = 1; static const size_t a_counter = 0; static const size_t b_counter = 20; -static const size_t prescaler = 8; //set below with enum -static const size_t vco_divider = 5; //set below with enum +static const size_t prescaler = 8; //set below with enum, set to 8 when input is under 2400 MHz +static const size_t vco_divider = 1; //set below with enum static const size_t n_counter = prescaler * b_counter + a_counter; -static const size_t vco_clock_rate = ref_clock_rate/r_counter * n_counter; +static const size_t vco_clock_rate = ref_clock_rate/r_counter * n_counter; //between 1400 and 1800 MHz static const double master_clock_rate = vco_clock_rate/vco_divider; static const size_t fpga_clock_divider = size_t(master_clock_rate/64e6); @@ -60,15 +60,18 @@ class usrp_e_clock_ctrl_impl : public usrp_e_clock_ctrl{ public: usrp_e_clock_ctrl_impl(usrp_e_iface::sptr iface){ _iface = iface; + std::cout << "master_clock_rate: " << (master_clock_rate/1e6) << " MHz" << std::endl; //init the clock gen registers //Note: out0 should already be clocking the FPGA or this isnt going to work _ad9522_regs.sdo_active = ad9522_regs_t::SDO_ACTIVE_SDO_SDIO; + _ad9522_regs.enb_stat_eeprom_at_stat_pin = 0; //use status pin _ad9522_regs.status_pin_control = 0x1; //n divider - _ad9522_regs.ld_pin_control = 0x32; //show ref2 + _ad9522_regs.ld_pin_control = 0x00; //dld _ad9522_regs.refmon_pin_control = 0x12; //show ref2 _ad9522_regs.enable_ref2 = 1; + _ad9522_regs.enable_ref1 = 0; _ad9522_regs.select_ref = ad9522_regs_t::SELECT_REF_REF2; _ad9522_regs.set_r_counter(r_counter); @@ -80,7 +83,7 @@ public: _ad9522_regs.cp_current = ad9522_regs_t::CP_CURRENT_3_0MA; _ad9522_regs.vco_calibration_now = 1; //calibrate it! - _ad9522_regs.vco_divider = ad9522_regs_t::VCO_DIVIDER_DIV5; + _ad9522_regs.vco_divider = ad9522_regs_t::VCO_DIVIDER_DIV1; _ad9522_regs.select_vco_or_clock = ad9522_regs_t::SELECT_VCO_OR_CLOCK_VCO; //setup fpga master clock |