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examples: handle sigint in rx_ascii_art_dft

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Grant Meyerhoff 2026-08-27 16:25:29 -05:00 committed by mkoop-ni
parent 4e3912efd8
commit 881f19db7c
1 changed files with 15 additions and 1 deletions
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16
host/examples/rx_ascii_art_dft.cpp
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@ -14,6 +14,7 @@
#include <boost/program_options.hpp>
#include <chrono>
#include <complex>
#include <csignal>
#include <cstdlib>
#include <iostream>
#include <thread>
@ -21,6 +22,15 @@
namespace po = boost::program_options;
using std::chrono::high_resolution_clock;
/***********************************************************************
* Signal handlers
**********************************************************************/
static volatile std::sig_atomic_t stop_signal_called = 0;
static void sig_int_handler(int)
{
stop_signal_called = 1;
}
int UHD_SAFE_MAIN(int argc, char* argv[])
{
const std::string program_doc =
@ -59,7 +69,7 @@ int UHD_SAFE_MAIN(int argc, char* argv[])
" t/T - Decrease/increase tuning step size\n"
" c - Toggle display of keyboard controls\n"
" Arrow keys - Fine-tune center frequency\n"
" Any other key - Exit the program\n"
" Any other key (or Ctrl + C) - Exit the program\n"
" All changes are applied immediately to the USRP device and the\n"
" spectrum display.\n"
" Note: The step size for frequency, sample rate, and bandwidth\n"
@ -273,6 +283,7 @@ int UHD_SAFE_MAIN(int argc, char* argv[])
//------------------------------------------------------------------
//-- Initialize
//------------------------------------------------------------------
std::signal(SIGINT, &sig_int_handler);
initscr(); // curses init
rx_stream->issue_stream_cmd(uhd::stream_cmd_t::STREAM_MODE_START_CONTINUOUS);
auto next_refresh = high_resolution_clock::now();
@ -342,6 +353,9 @@ int UHD_SAFE_MAIN(int argc, char* argv[])
int ch = getch();
// Key handling.
if (stop_signal_called) {
break;
}
if (ch == 'r') {
rate -= step;
usrp->set_rx_rate(rate);