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-rw-r--r--host/docs/coding.rst7
-rw-r--r--host/docs/images.rst3
-rw-r--r--host/examples/tx_waveforms.cpp89
-rw-r--r--host/include/uhd/utils/CMakeLists.txt1
-rw-r--r--host/include/uhd/utils/images.hpp38
-rw-r--r--host/lib/utils/CMakeLists.txt1
-rw-r--r--host/lib/utils/images.cpp40
-rw-r--r--host/lib/utils/paths.cpp14
8 files changed, 146 insertions, 47 deletions
diff --git a/host/docs/coding.rst b/host/docs/coding.rst
index 84f9abf3e..23f350b0f 100644
--- a/host/docs/coding.rst
+++ b/host/docs/coding.rst
@@ -64,7 +64,12 @@ Integrating custom hardware
------------------------------------------------------------------------
Creators of custom hardware can create drivers that use the UHD API.
These drivers can be built as dynamically loadable modules that the UHD will load at runtime.
-For a module to be loaded at runtime, it must be found in the UHD_MODULE_PATH environment variable.
+
+For a module to be loaded at runtime, it must be:
+
+* found in the UHD_MODULE_PATH environment variable,
+* installed into the <prefix>/share/uhd/modules directory,
+* or installed into /usr/share/uhd/modules directory (unix only).
^^^^^^^^^^^^^^^^^^^^^^^^^^^
Custom motherboard
diff --git a/host/docs/images.rst b/host/docs/images.rst
index ff5c5404e..612a00aa5 100644
--- a/host/docs/images.rst
+++ b/host/docs/images.rst
@@ -58,8 +58,7 @@ Where <prefix> was set by the CMAKE_INSTALL_PREFIX at configure-time.
**Option 2:**
Unpack the archive anywhere and set the UHD_IMAGE_PATH environment variable.
-The UHD_IMAGE_PATH may contain a list of directories to search for image files,
-or paths to specific image files.
+The UHD_IMAGE_PATH may contain a list of directories to search for image files.
------------------------------------------------------------------------
Building images
diff --git a/host/examples/tx_waveforms.cpp b/host/examples/tx_waveforms.cpp
index e9cf210bb..9886000b1 100644
--- a/host/examples/tx_waveforms.cpp
+++ b/host/examples/tx_waveforms.cpp
@@ -20,19 +20,41 @@
#include <uhd/usrp/simple_usrp.hpp>
#include <boost/program_options.hpp>
#include <boost/thread/thread_time.hpp> //system time
+#include <boost/math/special_functions/round.hpp>
#include <boost/format.hpp>
+#include <boost/function.hpp>
#include <iostream>
#include <complex>
#include <cmath>
namespace po = boost::program_options;
+/***********************************************************************
+ * Waveform generators
+ **********************************************************************/
+float gen_const(float){
+ return 1;
+}
+
+float gen_square(float x){
+ return float((std::fmod(x, 1) < float(0.5))? 0 : 1);
+}
+
+float gen_ramp(float x){
+ return std::fmod(x, 1)*2 - 1;
+}
+
+float gen_sine(float x){
+ static const float two_pi = 2*std::acos(float(-1));
+ return std::sin(x*two_pi);
+}
+
int UHD_SAFE_MAIN(int argc, char *argv[]){
uhd::set_thread_priority_safe();
//variables to be set by po
std::string args, wave_type;
- size_t total_duration, amspb;
+ size_t total_duration, spb;
double rate, freq, wave_freq;
float ampl, gain;
@@ -42,7 +64,7 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
("help", "help message")
("args", po::value<std::string>(&args)->default_value(""), "simple uhd device address args")
("duration", po::value<size_t>(&total_duration)->default_value(3), "number of seconds to transmit")
- ("amspb", po::value<size_t>(&amspb)->default_value(10000), "approximate mimimum samples per buffer")
+ ("spb", po::value<size_t>(&spb)->default_value(10000), "samples per buffer")
("rate", po::value<double>(&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(float(0.3)), "amplitude of the waveform")
@@ -88,33 +110,24 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
}
//error when the waveform is not possible to generate
- if (std::abs(wave_freq)/sdev->get_tx_rate() < 0.5/amspb){
- throw std::runtime_error("wave freq/tx rate too small");
- }
if (std::abs(wave_freq) > sdev->get_tx_rate()/2){
throw std::runtime_error("wave freq out of Nyquist zone");
}
- //fill a buffer with one period worth of samples
- std::vector<float> period(size_t(sdev->get_tx_rate()/std::abs(wave_freq)));
- std::cout << boost::format("Samples per waveform period: %d") % period.size() << std::endl;
- for (size_t n = 0; n < period.size(); n++){
- if (wave_type == "CONST") period[n] = ampl;
- else if (wave_type == "SQUARE") period[n] = (n > period.size()/2)? ampl : 0;
- else if (wave_type == "RAMP") period[n] = float((n/double(period.size()-1)) * 2*ampl - ampl);
- else if (wave_type == "SINE") period[n] = ampl*float(std::sin(2*M_PI*n/double(period.size())));
- else throw std::runtime_error("unknown waveform type: " + wave_type);
- }
-
- //allocate data to send (fill with several periods worth of IQ samples)
- const size_t periods_per_buff = std::max<size_t>(1, amspb/period.size());
- std::vector<std::complex<float> > buff(period.size()*periods_per_buff);
- std::cout << boost::format("Samples per send buffer: %d") % buff.size() << std::endl;
- const size_t i_ahead = (wave_freq > 0)? period.size()/4 : 0;
- const size_t q_ahead = (wave_freq < 0)? period.size()/4 : 0;
- for (size_t n = 0; n < buff.size(); n++) buff[n] = std::complex<float>(
- period[(n+i_ahead)%period.size()], period[(n+q_ahead)%period.size()] //I,Q
- );
+ //store the generator function for the selected waveform
+ boost::function<float(float)> wave_gen;
+ if (wave_type == "CONST") wave_gen = &gen_const;
+ else if (wave_type == "SQUARE") wave_gen = &gen_square;
+ else if (wave_type == "RAMP") wave_gen = &gen_ramp;
+ else if (wave_type == "SINE") wave_gen = &gen_sine;
+ else throw std::runtime_error("unknown waveform type: " + wave_type);
+
+ //allocate the buffer and precalculate values
+ std::vector<std::complex<float> > buff(spb);
+ const float cps = float(wave_freq/sdev->get_tx_rate());
+ const float i_off = (wave_freq > 0)? float(0.25) : 0;
+ const float q_off = (wave_freq < 0)? float(0.25) : 0;
+ float theta = 0;
//setup the metadata flags
uhd::tx_metadata_t md;
@@ -123,11 +136,27 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
//send the data in multiple packets
boost::system_time end_time(boost::get_system_time() + boost::posix_time::seconds(total_duration));
- while(end_time > boost::get_system_time()) dev->send(
- &buff.front(), buff.size(), md,
- uhd::io_type_t::COMPLEX_FLOAT32,
- uhd::device::SEND_MODE_FULL_BUFF
- );
+ while(end_time > boost::get_system_time()){
+
+ //fill the buffer with the waveform
+ for (size_t n = 0; n < buff.size(); n++){
+ buff[n] = std::complex<float>(
+ ampl*wave_gen(i_off + theta),
+ ampl*wave_gen(q_off + theta)
+ );
+ theta += cps;
+ }
+
+ //bring the theta back into range [0, 1)
+ theta = std::fmod(theta, 1);
+
+ //send the entire contents of the buffer
+ dev->send(
+ &buff.front(), buff.size(), md,
+ uhd::io_type_t::COMPLEX_FLOAT32,
+ uhd::device::SEND_MODE_FULL_BUFF
+ );
+ }
//send a mini EOB packet
md.start_of_burst = false;
diff --git a/host/include/uhd/utils/CMakeLists.txt b/host/include/uhd/utils/CMakeLists.txt
index ef8e64ce0..b39b6083c 100644
--- a/host/include/uhd/utils/CMakeLists.txt
+++ b/host/include/uhd/utils/CMakeLists.txt
@@ -23,6 +23,7 @@ INSTALL(FILES
byteswap.ipp
exception.hpp
gain_group.hpp
+ images.hpp
pimpl.hpp
props.hpp
safe_main.hpp
diff --git a/host/include/uhd/utils/images.hpp b/host/include/uhd/utils/images.hpp
new file mode 100644
index 000000000..8b5a1eedd
--- /dev/null
+++ b/host/include/uhd/utils/images.hpp
@@ -0,0 +1,38 @@
+//
+// 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/>.
+//
+
+#ifndef INCLUDED_UHD_UTILS_IMAGES_HPP
+#define INCLUDED_UHD_UTILS_IMAGES_HPP
+
+#include <uhd/config.hpp>
+#include <string>
+
+namespace uhd{
+
+ /*!
+ * Search for an image in the system image paths:
+ * Search compiled-in paths and environment variable paths
+ * for a specific image file with the provided file name.
+ * \param image_name the name of the file
+ * \return the full system path to the file
+ * \throw exception if the image was not found
+ */
+ UHD_API std::string find_image_path(const std::string &image_name);
+
+} //namespace uhd
+
+#endif /* INCLUDED_UHD_UTILS_IMAGES_HPP */
diff --git a/host/lib/utils/CMakeLists.txt b/host/lib/utils/CMakeLists.txt
index 68945545a..32b679d49 100644
--- a/host/lib/utils/CMakeLists.txt
+++ b/host/lib/utils/CMakeLists.txt
@@ -79,6 +79,7 @@ ENDIF(HAVE_DLFCN_H)
LIBUHD_APPEND_SOURCES(
${CMAKE_SOURCE_DIR}/lib/utils/assert.cpp
${CMAKE_SOURCE_DIR}/lib/utils/gain_group.cpp
+ ${CMAKE_SOURCE_DIR}/lib/utils/images.cpp
${CMAKE_SOURCE_DIR}/lib/utils/load_modules.cpp
${CMAKE_SOURCE_DIR}/lib/utils/paths.cpp
${CMAKE_SOURCE_DIR}/lib/utils/props.cpp
diff --git a/host/lib/utils/images.cpp b/host/lib/utils/images.cpp
new file mode 100644
index 000000000..395e542c1
--- /dev/null
+++ b/host/lib/utils/images.cpp
@@ -0,0 +1,40 @@
+//
+// 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/images.hpp>
+#include <boost/foreach.hpp>
+#include <boost/filesystem.hpp>
+#include <stdexcept>
+#include <vector>
+
+namespace fs = boost::filesystem;
+
+std::vector<fs::path> get_image_paths(void); //defined in paths.cpp
+
+/***********************************************************************
+ * Find a image in the image paths
+ **********************************************************************/
+std::string uhd::find_image_path(const std::string &image_name){
+ if (fs::exists(image_name)){
+ return fs::system_complete(image_name).file_string();
+ }
+ BOOST_FOREACH(const fs::path &path, get_image_paths()){
+ fs::path image_path = path / image_name;
+ if (fs::exists(image_path)) return image_path.file_string();
+ }
+ throw std::runtime_error("Could not find path for image: " + image_name);
+}
diff --git a/host/lib/utils/paths.cpp b/host/lib/utils/paths.cpp
index 6ad12d3cc..9e9525caf 100644
--- a/host/lib/utils/paths.cpp
+++ b/host/lib/utils/paths.cpp
@@ -85,17 +85,3 @@ std::vector<fs::path> get_module_paths(void){
paths.push_back(fs::path(INSTALLER_PKG_DATA_DIR) / "modules");
return paths;
}
-
-/***********************************************************************
- * Find a image in the image paths
- **********************************************************************/
-std::string find_image_path(const std::string &image_name){
- if (fs::exists(image_name)){
- return fs::system_complete(image_name).file_string();
- }
- BOOST_FOREACH(const fs::path &path, get_image_paths()){
- fs::path image_path = path / image_name;
- if (fs::exists(image_path)) return image_path.file_string();
- }
- throw std::runtime_error("Could not find path for image: " + image_name);
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-15 12:29:07 +0000