[Commit-gnuradio] r7486 - gnuradio/trunk/gr-usrp/src

[jcorgan]

Author: jcorgan
Date: 2008-01-21 17:06:28 -0700 (Mon, 21 Jan 2008)
New Revision: 7486

Modified:
   gnuradio/trunk/gr-usrp/src/db_flexrf.py
Log:
Further attempted noise reduction for ticket:230

Modified: gnuradio/trunk/gr-usrp/src/db_flexrf.py
===================================================================
--- gnuradio/trunk/gr-usrp/src/db_flexrf.py     2008-01-21 23:44:44 UTC (rev 
7485)
+++ gnuradio/trunk/gr-usrp/src/db_flexrf.py     2008-01-22 00:06:28 UTC (rev 
7486)
@@ -88,6 +88,9 @@
     def __del__(self):
         #print "flexrf_base.__del__"
         self._u.write_io(self._which, self.power_off, POWER_UP)   # turn off 
power to board
+       # Power down VCO/PLL
+       self.PD = 3 
+       self._write_control(self._compute_control_reg())
         self._enable_refclk(False)                       # turn off refclk
         self.set_auto_tr(False)
 
@@ -410,15 +413,19 @@
         R = (self.R_RSV<<22) | (self.BSC<<20) | (self.TEST<<19) | 
(self.LDP<<18) \
             | (self.ABP<<16) | (self.R_DIV<<2)
         
-        control = (self.P<<22) | (self.PD<<20) | (self.CP2<<17) | 
(self.CP1<<14) | (self.PL<<12) \
-                  | (self.MTLD<<11) | (self.CPG<<10) | (self.CP3S<<9) | 
(self.PDP<<8) | \
-                  (self.MUXOUT<<5) | (self.CR<<4) | (self.PC<<2)
+        control = self._compute_control_reg()
 
         N = (self.DIVSEL<<23) | (self.DIV2<<22) | (self.CPGAIN<<21) | 
(self.B_DIV<<8) | \
             (self.N_RSV<<7) | (self.A_DIV<<2)
 
         return (R,control,N,actual_freq/self.freq_mult)
 
+    def _compute_control_reg(self):
+        control = (self.P<<22) | (self.PD<<20) | (self.CP2<<17) | 
(self.CP1<<14) | (self.PL<<12) \
+                  | (self.MTLD<<11) | (self.CPG<<10) | (self.CP3S<<9) | 
(self.PDP<<8) | \
+                  (self.MUXOUT<<5) | (self.CR<<4) | (self.PC<<2)
+       return control    
+
     def _refclk_divisor(self):
         """
         Return value to stick in REFCLK_DIVISOR register