usrp2: handle real overflow packets in host, reload continuous stream cmd, remove firmware handling

4 files changed, 19 insertions, 2 deletions

diff --git a/firmware/microblaze/apps/txrx_uhd.c b/firmware/microblaze/apps/txrx_uhd.c
index 1dd6e80ac..dd43059a3 100644
--- a/firmware/microblaze/apps/txrx_uhd.c
+++ b/firmware/microblaze/apps/txrx_uhd.c
@@ -536,7 +536,7 @@ main(void)
     }
 
     if (pending & PIC_OVERRUN_INT){
-      dbsm_handle_rx_overrun(&dsp_rx_sm);
+      //dbsm_handle_rx_overrun(&dsp_rx_sm);
       pic_regs->pending = PIC_OVERRUN_INT;	// clear pending interrupt
 
       // FIXME Figure out how to handle this robustly.
diff --git a/host/lib/usrp/usrp2/io_impl.cpp b/host/lib/usrp/usrp2/io_impl.cpp
index bbe9c273f..83b70bddc 100644
--- a/host/lib/usrp/usrp2/io_impl.cpp
+++ b/host/lib/usrp/usrp2/io_impl.cpp
@@ -236,6 +236,11 @@ size_t usrp2_impl::get_max_recv_samps_per_packet(void) const{
     return bpp/_rx_otw_type.get_sample_size();
 }
 
+static void handle_overflow(std::vector<usrp2_mboard_impl::sptr> &mboards, size_t chan){
+    std::cerr << "O" << std::flush;
+    mboards.at(chan/mboards.size())->handle_overflow();
+}
+
 size_t usrp2_impl::recv(
     const std::vector<void *> &buffs, size_t num_samps,
     rx_metadata_t &metadata, const io_type_t &io_type,
@@ -248,6 +253,7 @@ size_t usrp2_impl::recv(
         io_type, _rx_otw_type,                     //input and output types to convert
         _mboards.front()->get_master_clock_freq(), //master clock tick rate
         uhd::transport::vrt::if_hdr_unpack_be,
-        boost::bind(&usrp2_impl::io_impl::get_recv_buffs, _io_impl.get(), _1, timeout)
+        boost::bind(&usrp2_impl::io_impl::get_recv_buffs, _io_impl.get(), _1, timeout),
+        boost::bind(&handle_overflow, _mboards, _1)
     );
 }
diff --git a/host/lib/usrp/usrp2/mboard_impl.cpp b/host/lib/usrp/usrp2/mboard_impl.cpp
index a0e6adfad..4c9f6af73 100644
--- a/host/lib/usrp/usrp2/mboard_impl.cpp
+++ b/host/lib/usrp/usrp2/mboard_impl.cpp
@@ -176,7 +176,15 @@ void usrp2_mboard_impl::set_time_spec(const time_spec_t &time_spec, bool now){
     _iface->poke32(U2_REG_TIME64_SECS, boost::uint32_t(time_spec.get_full_secs()));
 }
 
+void usrp2_mboard_impl::handle_overflow(void){
+    _iface->poke32(U2_REG_RX_CTRL_CLEAR_OVERRUN, 1);
+    if (_continuous_streaming){ //re-issue the stream command if already continuous
+        this->issue_ddc_stream_cmd(stream_cmd_t::STREAM_MODE_START_CONTINUOUS);
+    }
+}
+
 void usrp2_mboard_impl::issue_ddc_stream_cmd(const stream_cmd_t &stream_cmd){
+    _continuous_streaming = stream_cmd.stream_mode == stream_cmd_t::STREAM_MODE_START_CONTINUOUS;
     _iface->poke32(U2_REG_RX_CTRL_STREAM_CMD, dsp_type1::calc_stream_cmd_word(
         stream_cmd, _recv_frame_size
     ));
diff --git a/host/lib/usrp/usrp2/usrp2_impl.hpp b/host/lib/usrp/usrp2/usrp2_impl.hpp
index 558726a2b..a0c252047 100644
--- a/host/lib/usrp/usrp2/usrp2_impl.hpp
+++ b/host/lib/usrp/usrp2/usrp2_impl.hpp
@@ -92,10 +92,13 @@ public:
         return _clock_ctrl->get_master_clock_rate();
     }
 
+    void handle_overflow(void);
+
 private:
     size_t _index;
     int _rev_hi, _rev_lo;
     const size_t _recv_frame_size;
+    bool _continuous_streaming;
 
     //properties for this mboard
     void get(const wax::obj &, wax::obj &);