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-rw-r--r--host/lib/types/CMakeLists.txt56
-rw-r--r--host/lib/types/time_spec.cpp70
-rw-r--r--host/lib/usrp/usrp1/io_impl.cpp16
-rw-r--r--host/lib/usrp/usrp1/soft_time_ctrl.cpp37
-rw-r--r--host/lib/usrp/usrp1/usrp1_impl.hpp1
5 files changed, 139 insertions, 41 deletions
diff --git a/host/lib/types/CMakeLists.txt b/host/lib/types/CMakeLists.txt
index dfb7cf903..ad625111e 100644
--- a/host/lib/types/CMakeLists.txt
+++ b/host/lib/types/CMakeLists.txt
@@ -16,6 +16,62 @@
#
########################################################################
+# Setup defines for high resolution timing
+########################################################################
+MESSAGE(STATUS "")
+MESSAGE(STATUS "Configuring high resolution timing...")
+INCLUDE(CheckCXXSourceCompiles)
+
+SET(CMAKE_REQUIRED_LIBRARIES -lrt)
+CHECK_CXX_SOURCE_COMPILES("
+ #include <ctime>
+ int main(){
+ timespec ts;
+ return clock_gettime(CLOCK_MONOTONIC, &ts);
+ }
+ " HAVE_CLOCK_GETTIME
+)
+UNSET(CMAKE_REQUIRED_LIBRARIES)
+
+INCLUDE(CheckCXXSourceCompiles)
+CHECK_CXX_SOURCE_COMPILES("
+ #include <mach/mach_time.h>
+ int main(){
+ mach_timebase_info_data_t info;
+ mach_timebase_info(&info);
+ mach_absolute_time();
+ return 0;
+ }
+ " HAVE_MACH_ABSOLUTE_TIME
+)
+
+CHECK_CXX_SOURCE_COMPILES("
+ #include <Windows.h>
+ int main(){
+ LARGE_INTEGER value;
+ QueryPerformanceCounter(&value);
+ QueryPerformanceFrequency(&value);
+ return 0;
+ }
+ " HAVE_QUERY_PERFORMANCE_COUNTER
+)
+
+IF(HAVE_CLOCK_GETTIME)
+ MESSAGE(STATUS " High resolution timing supported through clock_gettime.")
+ ADD_DEFINITIONS(-DTIME_SPEC_USE_CLOCK_GETTIME)
+ SET(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -lrt")
+ELSEIF(HAVE_MACH_ABSOLUTE_TIME)
+ MESSAGE(STATUS " High resolution timing supported through mach_absolute_time.")
+ ADD_DEFINITIONS(-DTIME_SPEC_USE_MACH_ABSOLUTE_TIME)
+ELSEIF(HAVE_QUERY_PERFORMANCE_COUNTER)
+ MESSAGE(STATUS " High resolution timing supported through QueryPerformanceCounter.")
+ ADD_DEFINITIONS(-DTIME_SPEC_USE_QUERY_PERFORMANCE_COUNTER)
+ELSE()
+ MESSAGE(STATUS " High resolution timing supported though microsec_clock.")
+ ADD_DEFINITIONS(-DTIME_SPEC_USE_MICROSEC_CLOCK)
+ENDIF()
+
+########################################################################
# This file included, use CMake directory variables
########################################################################
LIBUHD_APPEND_SOURCES(
diff --git a/host/lib/types/time_spec.cpp b/host/lib/types/time_spec.cpp
index f39625a11..ece3b92f3 100644
--- a/host/lib/types/time_spec.cpp
+++ b/host/lib/types/time_spec.cpp
@@ -19,6 +19,70 @@
#include <boost/math/special_functions/round.hpp>
using namespace uhd;
+
+/***********************************************************************
+ * Time spec system time
+ **********************************************************************/
+
+/*!
+ * Creates a time spec from system counts:
+ * TODO make part of API as a static factory function
+ * The counts type is 64 bits and will overflow the ticks type of long.
+ * Therefore, divmod the counts into seconds + sub-second counts first.
+ */
+#include <inttypes.h> //imaxdiv, intmax_t
+static UHD_INLINE time_spec_t time_spec_t_from_counts(intmax_t counts, intmax_t freq){
+ imaxdiv_t divres = imaxdiv(counts, freq);
+ return time_spec_t(time_t(divres.quot), double(divres.rem)/freq);
+}
+
+#ifdef TIME_SPEC_USE_CLOCK_GETTIME
+#include <time.h>
+time_spec_t time_spec_t::get_system_time(void){
+ timespec ts; clock_gettime(CLOCK_MONOTONIC, &ts);
+ return time_spec_t(ts.tv_sec, ts.tv_nsec, 1e9);
+}
+#endif /* TIME_SPEC_USE_CLOCK_GETTIME */
+
+
+#ifdef TIME_SPEC_USE_MACH_ABSOLUTE_TIME
+#include <mach/mach_time.h>
+time_spec_t time_spec_t::get_system_time(void){
+ mach_timebase_info_data_t info; mach_timebase_info(&info);
+ intmax_t nanosecs = mach_absolute_time()*info.numer/info.denom;
+ return time_spec_t_from_counts(nanosecs, intmax_t(1e9));
+}
+#endif /* TIME_SPEC_USE_MACH_ABSOLUTE_TIME */
+
+
+#ifdef TIME_SPEC_USE_QUERY_PERFORMANCE_COUNTER
+#include <Windows.h>
+time_spec_t time_spec_t::get_system_time(void){
+ LARGE_INTEGER counts, freq;
+ QueryPerformanceCounter(&counts);
+ QueryPerformanceFrequency(&freq);
+ return time_spec_t_from_counts(counts.QuadPart, freq.QuadPart);
+}
+#endif /* TIME_SPEC_USE_QUERY_PERFORMANCE_COUNTER */
+
+
+#ifdef TIME_SPEC_USE_MICROSEC_CLOCK
+#include <boost/date_time/posix_time/posix_time.hpp>
+namespace pt = boost::posix_time;
+time_spec_t time_spec_t::get_system_time(void){
+ pt::ptime time_now = pt::microsec_clock::universal_time();
+ pt::time_duration time_dur = time_now - pt::from_time_t(0);
+ return time_spec_t(
+ time_t(time_dur.total_seconds()),
+ long(time_dur.fractional_seconds()),
+ double(pt::time_duration::ticks_per_second())
+ );
+}
+#endif /* TIME_SPEC_USE_MICROSEC_CLOCK */
+
+/***********************************************************************
+ * Time spec constructors
+ **********************************************************************/
time_spec_t::time_spec_t(double secs):
_full_secs(0),
_frac_secs(secs)
@@ -40,6 +104,9 @@ time_spec_t::time_spec_t(time_t full_secs, long tick_count, double tick_rate):
/* NOP */
}
+/***********************************************************************
+ * Time spec accessors
+ **********************************************************************/
long time_spec_t::get_tick_count(double tick_rate) const{
return boost::math::iround(this->get_frac_secs()*tick_rate);
}
@@ -58,6 +125,9 @@ double time_spec_t::get_frac_secs(void) const{
return std::fmod(this->_frac_secs, 1.0);
}
+/***********************************************************************
+ * Time spec math overloads
+ **********************************************************************/
time_spec_t &time_spec_t::operator+=(const time_spec_t &rhs){
this->_full_secs += rhs.get_full_secs();
this->_frac_secs += rhs.get_frac_secs();
diff --git a/host/lib/usrp/usrp1/io_impl.cpp b/host/lib/usrp/usrp1/io_impl.cpp
index 9fa1b4f72..52a7c6650 100644
--- a/host/lib/usrp/usrp1/io_impl.cpp
+++ b/host/lib/usrp/usrp1/io_impl.cpp
@@ -91,7 +91,6 @@ struct usrp1_impl::io_impl{
void commit_send_buff(offset_send_buffer::sptr, offset_send_buffer::sptr, size_t);
void flush_send_buff(void);
bool get_send_buffs(vrt_packet_handler::managed_send_buffs_t &, double);
- bool transmitting_enb;
};
/*!
@@ -133,6 +132,9 @@ void usrp1_impl::io_impl::flush_send_buff(void){
//calculate the number of bytes to alignment
size_t bytes_to_pad = (-1*curr_buff->offset)%alignment_padding;
+ //send at least alignment_padding to guarantee zeros are sent
+ if (bytes_to_pad == 0) bytes_to_pad = alignment_padding;
+
//get the buffer, clear, and commit (really current buffer)
vrt_packet_handler::managed_send_buffs_t buffs(1);
if (this->get_send_buffs(buffs, 0.1)){
@@ -190,7 +192,7 @@ void usrp1_impl::io_init(void){
);
rx_stream_on_off(false);
- tx_stream_on_off(false);
+ _io_impl->flush_send_buff();
}
void usrp1_impl::rx_stream_on_off(bool enb){
@@ -201,13 +203,6 @@ void usrp1_impl::rx_stream_on_off(bool enb){
}
}
-void usrp1_impl::tx_stream_on_off(bool enb){
- if (not enb) _io_impl->flush_send_buff();
- _codec_ctrls[DBOARD_SLOT_A]->enable_tx_digital(enb);
- _codec_ctrls[DBOARD_SLOT_B]->enable_tx_digital(enb);
- _io_impl->transmitting_enb = enb;
-}
-
/***********************************************************************
* Data send + helper functions
**********************************************************************/
@@ -232,7 +227,6 @@ size_t usrp1_impl::send(
send_mode_t send_mode, double timeout
){
if (_soft_time_ctrl->send_pre(metadata, timeout)) return num_samps;
- if (not _io_impl->transmitting_enb) tx_stream_on_off(true);
size_t num_samps_sent = vrt_packet_handler::send(
_io_impl->packet_handler_send_state, //last state of the send handler
@@ -250,7 +244,7 @@ size_t usrp1_impl::send(
//handle eob flag (commit the buffer, disable the DACs)
//check num samps sent to avoid flush on incomplete/timeout
if (metadata.end_of_burst and num_samps_sent == num_samps){
- this->tx_stream_on_off(false);
+ _io_impl->flush_send_buff();
}
//handle the polling for underflow conditions
diff --git a/host/lib/usrp/usrp1/soft_time_ctrl.cpp b/host/lib/usrp/usrp1/soft_time_ctrl.cpp
index c91ecc7ed..246df93eb 100644
--- a/host/lib/usrp/usrp1/soft_time_ctrl.cpp
+++ b/host/lib/usrp/usrp1/soft_time_ctrl.cpp
@@ -18,7 +18,8 @@
#include "soft_time_ctrl.hpp"
#include <uhd/transport/bounded_buffer.hpp>
#include <boost/any.hpp>
-#include <boost/thread.hpp>
+#include <boost/thread/thread.hpp>
+#include <boost/thread/condition_variable.hpp>
#include <boost/date_time/posix_time/posix_time.hpp>
#include <iostream>
@@ -27,30 +28,7 @@ using namespace uhd::usrp;
using namespace uhd::transport;
namespace pt = boost::posix_time;
-static const time_spec_t TWIDDLE(0.0015);
-
-/***********************************************************************
- * Utility helper functions
- **********************************************************************/
-
-//TODO put these in time_spec_t (maybe useful)
-
-static const double time_dur_tps = double(pt::time_duration::ticks_per_second());
-
-time_spec_t time_dur_to_time_spec(const pt::time_duration &time_dur){
- return time_spec_t(
- time_dur.total_seconds(),
- long(time_dur.fractional_seconds()),
- time_dur_tps
- );
-}
-
-pt::time_duration time_spec_to_time_dur(const time_spec_t &time_spec){
- return pt::time_duration(
- 0, 0, long(time_spec.get_full_secs()),
- time_spec.get_tick_count(time_dur_tps)
- );
-}
+static const time_spec_t TWIDDLE(0.0011);
/***********************************************************************
* Soft time control implementation
@@ -84,7 +62,7 @@ public:
******************************************************************/
void set_time(const time_spec_t &time){
boost::mutex::scoped_lock lock(_update_mutex);
- _time_offset = boost::get_system_time() - time_spec_to_time_dur(time);
+ _time_offset = time_spec_t::get_system_time() - time;
}
time_spec_t get_time(void){
@@ -94,7 +72,7 @@ public:
UHD_INLINE time_spec_t time_now(void){
//internal get time without scoped lock
- return time_dur_to_time_spec(boost::get_system_time() - _time_offset);
+ return time_spec_t::get_system_time() - _time_offset;
}
UHD_INLINE void sleep_until_time(
@@ -102,7 +80,8 @@ public:
){
boost::condition_variable cond;
//use a condition variable to unlock, sleep, lock
- cond.timed_wait(lock, _time_offset + time_spec_to_time_dur(time));
+ double seconds_to_sleep = (time - time_now()).get_real_secs();
+ cond.timed_wait(lock, pt::microseconds(long(seconds_to_sleep*1e6)));
}
/*******************************************************************
@@ -211,7 +190,7 @@ private:
boost::mutex _update_mutex;
size_t _nsamps_remaining;
stream_cmd_t::stream_mode_t _stream_mode;
- pt::ptime _time_offset;
+ time_spec_t _time_offset;
bounded_buffer<boost::any>::sptr _cmd_queue;
const cb_fcn_type _stream_on_off;
boost::thread_group _thread_group;
diff --git a/host/lib/usrp/usrp1/usrp1_impl.hpp b/host/lib/usrp/usrp1/usrp1_impl.hpp
index 057725394..28199ebe3 100644
--- a/host/lib/usrp/usrp1/usrp1_impl.hpp
+++ b/host/lib/usrp/usrp1/usrp1_impl.hpp
@@ -125,7 +125,6 @@ private:
UHD_PIMPL_DECL(io_impl) _io_impl;
void io_init(void);
void rx_stream_on_off(bool);
- void tx_stream_on_off(bool);
void handle_overrun(size_t);
//underrun and overrun poll intervals
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-16 17:46:13 +0000