Added tx timed samples example.

Added called to device to get max samples per packet.
Removed device props that gave max samples per packet.

9 files changed, 138 insertions, 36 deletions

diff --git a/host/examples/CMakeLists.txt b/host/examples/CMakeLists.txt
index 242857625..a537c0901 100644
--- a/host/examples/CMakeLists.txt
+++ b/host/examples/CMakeLists.txt
@@ -18,3 +18,7 @@
 ADD_EXECUTABLE(rx_timed_samples rx_timed_samples.cpp)
 TARGET_LINK_LIBRARIES(rx_timed_samples uhd)
 INSTALL(TARGETS rx_timed_samples RUNTIME DESTINATION ${PKG_DATA_DIR}/examples)
+
+ADD_EXECUTABLE(tx_timed_samples tx_timed_samples.cpp)
+TARGET_LINK_LIBRARIES(tx_timed_samples uhd)
+INSTALL(TARGETS tx_timed_samples RUNTIME DESTINATION ${PKG_DATA_DIR}/examples)
diff --git a/host/examples/rx_timed_samples.cpp b/host/examples/rx_timed_samples.cpp
index 4b8774036..d2306c7c4 100644
--- a/host/examples/rx_timed_samples.cpp
+++ b/host/examples/rx_timed_samples.cpp
@@ -29,7 +29,7 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
     std::string args;
     int seconds_in_future;
     size_t total_num_samps;
-    double rx_rate;
+    double rx_rate, freq;
 
     //setup the program options
     po::options_description desc("Allowed options");
@@ -39,10 +39,11 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
         ("secs", po::value<int>(&seconds_in_future)->default_value(3), "number of seconds in the future to receive")
         ("nsamps", po::value<size_t>(&total_num_samps)->default_value(1000), "total number of samples to receive")
         ("rxrate", po::value<double>(&rx_rate)->default_value(100e6/16), "rate of incoming samples")
+        ("freq", po::value<double>(&freq)->default_value(0), "rf center frequency in Hz")
     ;
     po::variables_map vm;
     po::store(po::parse_command_line(argc, argv, desc), vm);
-    po::notify(vm); 
+    po::notify(vm);
 
     //print the help message
     if (vm.count("help")){
@@ -62,6 +63,7 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
     sdev->set_rx_rate(rx_rate);
     std::cout << boost::format("Actual RX Rate: %f Msps...") % (sdev->get_rx_rate()/1e6) << std::endl;
     std::cout << boost::format("Setting device timestamp to 0...") << std::endl;
+    sdev->set_rx_freq(freq);
     sdev->set_time_now(uhd::time_spec_t(0));
 
     //setup streaming
@@ -78,10 +80,11 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
     size_t num_acc_samps = 0; //number of accumulated samples
     while(num_acc_samps < total_num_samps){
         uhd::rx_metadata_t md;
-        std::complex<float> buff[1000];
+        std::vector<std::complex<float> > buff(dev->get_max_recv_samps_per_packet());
         size_t num_rx_samps = dev->recv(
-            boost::asio::buffer(buff, sizeof(buff)),
-            md, uhd::io_type_t::COMPLEX_FLOAT32
+            boost::asio::buffer(buff),
+            md, uhd::io_type_t::COMPLEX_FLOAT32,
+            uhd::device::RECV_MODE_ONE_PACKET
         );
         if (num_rx_samps == 0) continue; //wait for packets with contents
 
diff --git a/host/examples/tx_timed_samples.cpp b/host/examples/tx_timed_samples.cpp
new file mode 100644
index 000000000..6dee69cd5
--- /dev/null
+++ b/host/examples/tx_timed_samples.cpp
@@ -0,0 +1,92 @@
+//
+// Copyright 2010 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include <uhd/utils/safe_main.hpp>
+#include <uhd/usrp/simple_usrp.hpp>
+#include <boost/program_options.hpp>
+#include <boost/format.hpp>
+#include <iostream>
+#include <complex>
+
+namespace po = boost::program_options;
+
+int UHD_SAFE_MAIN(int argc, char *argv[]){
+    //variables to be set by po
+    std::string args;
+    int seconds_in_future;
+    size_t total_num_samps;
+    double tx_rate, freq;
+    float ampl;
+
+    //setup the program options
+    po::options_description desc("Allowed options");
+    desc.add_options()
+        ("help", "help message")
+        ("args", po::value<std::string>(&args)->default_value(""), "simple uhd device address args")
+        ("secs", po::value<int>(&seconds_in_future)->default_value(3), "number of seconds in the future to transmit")
+        ("nsamps", po::value<size_t>(&total_num_samps)->default_value(1000), "total number of samples to transmit")
+        ("txrate", po::value<double>(&tx_rate)->default_value(100e6/16), "rate of outgoing samples")
+        ("freq", po::value<double>(&freq)->default_value(0), "rf center frequency in Hz")
+        ("ampl", po::value<float>(&ampl)->default_value(0.3), "amplitude of each sample")
+    ;
+    po::variables_map vm;
+    po::store(po::parse_command_line(argc, argv, desc), vm);
+    po::notify(vm);
+
+    //print the help message
+    if (vm.count("help")){
+        std::cout << boost::format("UHD TX Timed Samples %s") % desc << std::endl;
+        return ~0;
+    }
+
+    //create a usrp device
+    std::cout << std::endl;
+    std::cout << boost::format("Creating the usrp device with: %s...") % args << std::endl;
+    uhd::usrp::simple_usrp::sptr sdev = uhd::usrp::simple_usrp::make(args);
+    uhd::device::sptr dev = sdev->get_device();
+    std::cout << boost::format("Using Device: %s") % sdev->get_name() << std::endl;
+
+    //set properties on the device
+    std::cout << boost::format("Setting TX Rate: %f Msps...") % (tx_rate/1e6) << std::endl;
+    sdev->set_tx_rate(tx_rate);
+    std::cout << boost::format("Actual TX Rate: %f Msps...") % (sdev->get_tx_rate()/1e6) << std::endl;
+    std::cout << boost::format("Setting device timestamp to 0...") << std::endl;
+    sdev->set_tx_freq(freq);
+    sdev->set_time_now(uhd::time_spec_t(0));
+
+    //data to send
+    std::vector<std::complex<float> > buff(total_num_samps, std::complex<float>(ampl, ampl));
+    uhd::tx_metadata_t md;
+    md.start_of_burst = true;
+    md.end_of_burst = true;
+    md.has_time_spec = true;
+    md.time_spec = uhd::time_spec_t(seconds_in_future);
+
+    //send the entire buffer, let the driver handle fragmentation
+    size_t num_tx_samps = dev->send(
+        boost::asio::buffer(buff),
+        md, uhd::io_type_t::COMPLEX_FLOAT32,
+        uhd::device::SEND_MODE_FULL_BUFF
+    );
+    std::cout << std::endl << boost::format("Sent %d samples") % num_tx_samps << std::endl;
+
+
+    //finished
+    std::cout << std::endl << "Done!" << std::endl << std::endl;
+
+    return 0;
+}
diff --git a/host/include/uhd/device.hpp b/host/include/uhd/device.hpp
index a76b34ee2..27b461184 100644
--- a/host/include/uhd/device.hpp
+++ b/host/include/uhd/device.hpp
@@ -87,6 +87,16 @@ public:
     };
 
     /*!
+     * Recv modes for the device recv routine.
+     */
+    enum recv_mode_t{
+        //! Tells the recv routine to recv the entire buffer
+        RECV_MODE_FULL_BUFF = 0,
+        //! Tells the recv routine to return after one packet
+        RECV_MODE_ONE_PACKET = 1
+    };
+
+    /*!
      * Send a buffer containing IF data with its metadata.
      *
      * Send handles fragmentation as follows:
@@ -114,16 +124,6 @@ public:
     ) = 0;
 
     /*!
-     * Recv modes for the device recv routine.
-     */
-    enum recv_mode_t{
-        //! Tells the recv routine to recv the entire buffer
-        RECV_MODE_FULL_BUFF = 0,
-        //! Tells the recv routine to return after one packet
-        RECV_MODE_ONE_PACKET = 1
-    };
-
-    /*!
      * Receive a buffer containing IF data and its metadata.
      *
      * Receive handles fragmentation as follows:
@@ -161,6 +161,19 @@ public:
         const io_type_t &io_type,
         recv_mode_t recv_mode = RECV_MODE_ONE_PACKET
     ) = 0;
+
+    /*!
+     * Get the maximum number of samples per packet on send.
+     * \return the number of samples
+     */
+    virtual size_t get_max_send_samps_per_packet(void) const = 0;
+
+    /*!
+     * Get the maximum number of samples per packet on recv.
+     * \return the number of samples
+     */
+    virtual size_t get_max_recv_samps_per_packet(void) const = 0;
+
 };
 
 } //namespace uhd
diff --git a/host/include/uhd/usrp/device_props.hpp b/host/include/uhd/usrp/device_props.hpp
index b8f6f5cd4..983bcb672 100644
--- a/host/include/uhd/usrp/device_props.hpp
+++ b/host/include/uhd/usrp/device_props.hpp
@@ -31,9 +31,7 @@ namespace uhd{ namespace usrp{
     enum device_prop_t{
         DEVICE_PROP_NAME           = 'n', //ro, std::string
         DEVICE_PROP_MBOARD         = 'm', //ro, wax::obj
-        DEVICE_PROP_MBOARD_NAMES   = 'M', //ro, prop_names_t
-        DEVICE_PROP_MAX_RX_SAMPLES = 'r', //ro, size_t
-        DEVICE_PROP_MAX_TX_SAMPLES = 't'  //ro, size_t
+        DEVICE_PROP_MBOARD_NAMES   = 'M'  //ro, prop_names_t
     };
 
     ////////////////////////////////////////////////////////////////////////
diff --git a/host/lib/usrp/usrp2/io_impl.cpp b/host/lib/usrp/usrp2/io_impl.cpp
index 485cc2bd9..b6ab919e7 100644
--- a/host/lib/usrp/usrp2/io_impl.cpp
+++ b/host/lib/usrp/usrp2/io_impl.cpp
@@ -48,8 +48,8 @@ void usrp2_impl::io_init(void){
     send_buff->done(sizeof(data));
 
     //setup RX DSP regs
-    std::cout << "RX samples per packet: " << max_rx_samps_per_packet() << std::endl;
-    _iface->poke32(FR_RX_CTRL_NSAMPS_PER_PKT, max_rx_samps_per_packet());
+    std::cout << "RX samples per packet: " << get_max_recv_samps_per_packet() << std::endl;
+    _iface->poke32(FR_RX_CTRL_NSAMPS_PER_PKT, get_max_recv_samps_per_packet());
     _iface->poke32(FR_RX_CTRL_NCHANNELS, 1);
     _iface->poke32(FR_RX_CTRL_CLEAR_OVERRUN, 1); //reset
     _iface->poke32(FR_RX_CTRL_VRT_HEADER, 0
@@ -77,7 +77,7 @@ size_t usrp2_impl::send(
         io_type, _tx_otw_type,      //input and output types to convert
         get_master_clock_freq(),    //master clock tick rate
         _data_transport,            //zero copy interface
-        max_tx_samps_per_packet()
+        get_max_send_samps_per_packet()
     );
 }
 
diff --git a/host/lib/usrp/usrp2/mboard_impl.cpp b/host/lib/usrp/usrp2/mboard_impl.cpp
index a10529102..f17efd88e 100644
--- a/host/lib/usrp/usrp2/mboard_impl.cpp
+++ b/host/lib/usrp/usrp2/mboard_impl.cpp
@@ -111,7 +111,7 @@ void usrp2_impl::issue_ddc_stream_cmd(const stream_cmd_t &stream_cmd){
 
     //issue the stream command
     _iface->poke32(FR_RX_CTRL_STREAM_CMD, FR_RX_CTRL_MAKE_CMD(
-        (inst_samps)? stream_cmd.num_samps : ((inst_chain)? max_rx_samps_per_packet() : 1),
+        (inst_samps)? stream_cmd.num_samps : ((inst_chain)? get_max_recv_samps_per_packet() : 1),
         (stream_cmd.stream_now)? 1 : 0,
         (inst_chain)? 1 : 0,
         (inst_reload)? 1 : 0
diff --git a/host/lib/usrp/usrp2/usrp2_impl.cpp b/host/lib/usrp/usrp2/usrp2_impl.cpp
index 3b7156802..af3ec216a 100644
--- a/host/lib/usrp/usrp2/usrp2_impl.cpp
+++ b/host/lib/usrp/usrp2/usrp2_impl.cpp
@@ -210,14 +210,6 @@ void usrp2_impl::get(const wax::obj &key_, wax::obj &val){
         val = prop_names_t(1, "");
         return;
 
-    case DEVICE_PROP_MAX_RX_SAMPLES:
-        val = max_rx_samps_per_packet();
-        return;
-
-    case DEVICE_PROP_MAX_TX_SAMPLES:
-        val = max_tx_samps_per_packet();
-        return;
-
     default: UHD_THROW_PROP_GET_ERROR();
     }
 }
diff --git a/host/lib/usrp/usrp2/usrp2_impl.hpp b/host/lib/usrp/usrp2/usrp2_impl.hpp
index ad674f594..afea9683c 100644
--- a/host/lib/usrp/usrp2/usrp2_impl.hpp
+++ b/host/lib/usrp/usrp2/usrp2_impl.hpp
@@ -104,12 +104,18 @@ public:
     ~usrp2_impl(void);
 
     //the io interface
+    size_t get_max_send_samps_per_packet(void) const{
+        return _max_tx_bytes_per_packet/_tx_otw_type.get_sample_size();
+    }
     size_t send(
         const boost::asio::const_buffer &,
         const uhd::tx_metadata_t &,
         const uhd::io_type_t &,
         uhd::device::send_mode_t
     );
+    size_t get_max_recv_samps_per_packet(void) const{
+        return _max_rx_bytes_per_packet/_rx_otw_type.get_sample_size();
+    }
     size_t recv(
         const boost::asio::mutable_buffer &,
         uhd::rx_metadata_t &,
@@ -146,12 +152,6 @@ private:
         _mtu - _hdrs -
         uhd::transport::vrt::max_header_words32*sizeof(boost::uint32_t)
     ;
-    size_t max_rx_samps_per_packet(void){
-        return _max_rx_bytes_per_packet/_rx_otw_type.get_sample_size();
-    }
-    size_t max_tx_samps_per_packet(void){
-        return _max_tx_bytes_per_packet/_tx_otw_type.get_sample_size();
-    }
 
     vrt_packet_handler::recv_state _packet_handler_recv_state;
     vrt_packet_handler::send_state _packet_handler_send_state;