Autoconfigure refclk frequency if LEA-M8F detectedlea-m8f-003_009_004

This should make this branch compatible with both Ettus GPSDO
using 10MHz refclk and the LEA-M8F using 30.72MHz

2 files changed, 19 insertions, 2 deletions

diff --git a/host/lib/usrp/common/adf4001_ctrl.cpp b/host/lib/usrp/common/adf4001_ctrl.cpp
index 076385050..e38142f93 100644
--- a/host/lib/usrp/common/adf4001_ctrl.cpp
+++ b/host/lib/usrp/common/adf4001_ctrl.cpp
@@ -101,8 +101,8 @@ adf4001_ctrl::adf4001_ctrl(uhd::spi_iface::sptr _spi, int slaveno):
     spi_config.mosi_edge = spi_config_t::EDGE_RISE;
 
     //set defaults
-    adf4001_regs.ref_counter = 96;
-    adf4001_regs.n = 125;
+    adf4001_regs.ref_counter = 1;
+    adf4001_regs.n = 4;
     adf4001_regs.charge_pump_current_1 = 7;
     adf4001_regs.charge_pump_current_2 = 7;
     adf4001_regs.muxout = adf4001_regs_t::MUXOUT_DLD;
@@ -125,6 +125,22 @@ void adf4001_ctrl::set_lock_to_ext_ref(bool external) {
     program_regs();
 }
 
+bool adf4001_ctrl::set_refclk_frequency(int refclk_kHz)
+{
+    if (refclk_kHz == 30720) {
+        adf4001_regs.ref_counter = 96;
+        adf4001_regs.n = 125;
+    } else if (refclk_kHz == 10000) {
+        adf4001_regs.ref_counter = 1;
+        adf4001_regs.n = 4;
+    } else {
+        return false;
+    }
+
+    program_regs();
+    return true;
+}
+
 void adf4001_ctrl::program_regs(void) {
     //no control over CE, only LE, therefore we use the initialization latch method
     write_reg(3);
diff --git a/host/lib/usrp/common/adf4001_ctrl.hpp b/host/lib/usrp/common/adf4001_ctrl.hpp
index e801ae0c4..66c289f7d 100644
--- a/host/lib/usrp/common/adf4001_ctrl.hpp
+++ b/host/lib/usrp/common/adf4001_ctrl.hpp
@@ -125,6 +125,7 @@ class adf4001_ctrl {
 public:
     adf4001_ctrl(uhd::spi_iface::sptr _spi, int slaveno);
     virtual void set_lock_to_ext_ref(bool external);
+    virtual bool set_refclk_frequency(int refclk_kHz);
 
 private:
     uhd::spi_iface::sptr spi_iface;