uhd: re-work to make the properties easier to use

2 files changed, 12 insertions, 4 deletions

diff --git a/host/lib/usrp/cores/rx_dsp_core_200.cpp b/host/lib/usrp/cores/rx_dsp_core_200.cpp
index 5aa32c630..b13cc8f03 100644
--- a/host/lib/usrp/cores/rx_dsp_core_200.cpp
+++ b/host/lib/usrp/cores/rx_dsp_core_200.cpp
@@ -48,10 +48,18 @@ public:
     rx_dsp_core_200_impl(
         wb_iface::sptr iface,
         const size_t dsp_base, const size_t ctrl_base,
-        const boost::uint32_t sid
+        const boost::uint32_t sid, const bool lingering_packet
     ):
         _iface(iface), _dsp_base(dsp_base), _ctrl_base(ctrl_base)
     {
+        //This is a hack/fix for the lingering packet problem.
+        //The caller should also flush the recv transports
+        if (lingering_packet){
+            stream_cmd_t stream_cmd(stream_cmd_t::STREAM_MODE_NUM_SAMPS_AND_DONE);
+            stream_cmd.num_samps = 1;
+            issue_stream_command(stream_cmd);
+        }
+
         _iface->poke32(REG_RX_CTRL_CLEAR, 1); //reset
         _iface->poke32(REG_RX_CTRL_NCHANNELS, 1);
         _iface->poke32(REG_RX_CTRL_VRT_HDR, 0
@@ -162,6 +170,6 @@ private:
     bool _continuous_streaming;
 };
 
-rx_dsp_core_200::sptr rx_dsp_core_200::make(wb_iface::sptr iface, const size_t dsp_base, const size_t ctrl_base, const boost::uint32_t sid){
-    return sptr(new rx_dsp_core_200_impl(iface, dsp_base, ctrl_base, sid));
+rx_dsp_core_200::sptr rx_dsp_core_200::make(wb_iface::sptr iface, const size_t dsp_base, const size_t ctrl_base, const boost::uint32_t sid, const bool lingering_packet){
+    return sptr(new rx_dsp_core_200_impl(iface, dsp_base, ctrl_base, sid, lingering_packet));
 }
diff --git a/host/lib/usrp/cores/rx_dsp_core_200.hpp b/host/lib/usrp/cores/rx_dsp_core_200.hpp
index 6bc7c6102..c496fca76 100644
--- a/host/lib/usrp/cores/rx_dsp_core_200.hpp
+++ b/host/lib/usrp/cores/rx_dsp_core_200.hpp
@@ -32,7 +32,7 @@ public:
     static sptr make(
         wb_iface::sptr iface,
         const size_t dsp_base, const size_t ctrl_base,
-        const boost::uint32_t sid
+        const boost::uint32_t sid, const bool lingering_packet = false
     );
 
     virtual void set_nsamps_per_packet(const size_t nsamps) = 0;