usrp1: fixed swapped sign on rx cordic

We used to swap I and Q to share converter functions with the newer products.
Because of this, the sign on the cordic also had to be swapped.

Now that USRP1 has its own converter routines and I and Q are correct,
so should be the sign on the cordic. This was a bug introduced in master.

TX should not be an issue, because there is no cordic
and is adjusted digitally by the codec, after any potential swapping.

1 files changed, 1 insertions, 1 deletions

diff --git a/host/lib/usrp/usrp1/io_impl.cpp b/host/lib/usrp/usrp1/io_impl.cpp
index ff89b2e18..234bf1b25 100644
--- a/host/lib/usrp/usrp1/io_impl.cpp
+++ b/host/lib/usrp/usrp1/io_impl.cpp
@@ -543,7 +543,7 @@ double usrp1_impl::update_rx_dsp_freq(const size_t dspno, const double freq_){
     static const boost::uint32_t dsp_index_to_reg_val[4] = {
         FR_RX_FREQ_0, FR_RX_FREQ_1, FR_RX_FREQ_2, FR_RX_FREQ_3
     };
-    _iface->poke32(dsp_index_to_reg_val[dspno], ~freq_word + 1);
+    _iface->poke32(dsp_index_to_reg_val[dspno], freq_word);
 
     return (double(freq_word) / scale_factor) * _master_clock_rate;
 }