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examples/nxscope: control stream interval from CLI #3426

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105 changes: 97 additions & 8 deletions examples/nxscope/nxscope_main.c
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Original file line number Diff line number Diff line change
Expand Up @@ -29,15 +29,17 @@
#include <sys/boardctl.h>

#include <assert.h>
#include <errno.h>
#include <getopt.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <math.h>

#ifdef CONFIG_EXAMPLES_NXSCOPE_TIMER
# include <sys/ioctl.h>
# include <fcntl.h>
# include <stdlib.h>
# include <signal.h>
# include <nuttx/timers/timer.h>
#endif
Expand All @@ -52,7 +54,8 @@
# error "math library must be selected for this example"
#endif

#define SIN_DT (0.01f)
#define SIN_DT (0.01f)
#define STREAM_THREAD_USLEP 100

/****************************************************************************
* Private Types
Expand All @@ -61,6 +64,7 @@
struct nxscope_thr_env_s
{
FAR struct nxscope_s *nxs;
int interval;
};

/****************************************************************************
Expand Down Expand Up @@ -93,12 +97,76 @@ static int nxscope_cb_start(FAR void *priv, bool start)
return OK;
}

/****************************************************************************
* Name: nxscope_show_usage
****************************************************************************/

static void nxscope_show_usage(FAR const char *progname)
{
printf("Usage: %s [-i <stream_interval_us>]\n", progname);
printf(" [-m <main_interval_us>]\n");
}

/****************************************************************************
* Name: nxscope_parse_args
****************************************************************************/

static int nxscope_parse_args(int argc, FAR char *argv[],
FAR int *stream_interval,
FAR int *main_interval)
{
unsigned long value = 0;
int opt = 0;

DEBUGASSERT(argv);
DEBUGASSERT(stream_interval);
DEBUGASSERT(main_interval);

while ((opt = getopt(argc, argv, "i:m:")) != -1)
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@cederom cederom Mar 16, 2026

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isn't h supported help trigger? :-)

{
switch (opt)
{
case 'i':
{
value = strtoul(optarg, NULL, 10);
if (value == 0)
{
printf("ERROR: invalid interval: %s\n", optarg);
return -EINVAL;
}

*stream_interval = (int)value;
break;
}

case 'm':
{
value = strtoul(optarg, NULL, 10);
if (value == 0)
{
printf("ERROR: invalid interval: %s\n", optarg);
return -EINVAL;
}

*main_interval = (int)value;
break;
}

default:
printf("ERROR: unsupported argument\n");
return -EINVAL;
}
}

return OK;
}

#ifdef CONFIG_EXAMPLES_NXSCOPE_TIMER
/****************************************************************************
* Name: nxscope_timer_init
****************************************************************************/

static int nxscope_timer_init(void)
static int nxscope_timer_init(int interval_us)
{
int fd = 0;
int ret = 0;
Expand All @@ -116,8 +184,7 @@ static int nxscope_timer_init(void)

/* Set the timer interval */

ret = ioctl(fd, TCIOC_SETTIMEOUT,
CONFIG_EXAMPLES_NXSCOPE_TIMER_INTERVAL);
ret = ioctl(fd, TCIOC_SETTIMEOUT, interval_us);
if (ret < 0)
{
printf("ERROR: Failed to set the timer interval: %d\n", errno);
Expand Down Expand Up @@ -197,7 +264,7 @@ static FAR void *nxscope_samples_thr(FAR void *arg)
#ifdef CONFIG_EXAMPLES_NXSCOPE_TIMER
/* Initialize timer for periodic signal. */

ret = nxscope_timer_init();
ret = nxscope_timer_init(envp->interval);
if (ret < 0)
{
printf("ERROR: nxscope_timer_init() failed: %d\n", errno);
Expand Down Expand Up @@ -307,7 +374,7 @@ static FAR void *nxscope_samples_thr(FAR void *arg)
goto errout;
}
#else
usleep(100);
usleep(envp->interval);
#endif
}

Expand Down Expand Up @@ -421,6 +488,7 @@ int main(int argc, FAR char *argv[])
{
struct nxscope_s nxs;
int ret = OK;
int interval;
pthread_t thread;
struct nxscope_thr_env_s env;
struct nxscope_cfg_s nxs_cfg;
Expand All @@ -435,6 +503,27 @@ int main(int argc, FAR char *argv[])
struct nxscope_dummy_cfg_s nxs_dummy_cfg;
#endif

/* Default settings */

interval = CONFIG_EXAMPLES_NXSCOPE_MAIN_INTERVAL;
#ifdef CONFIG_EXAMPLES_NXSCOPE_TIMER
env.interval = CONFIG_EXAMPLES_NXSCOPE_TIMER_INTERVAL;
#else
env.interval = STREAM_THREAD_USLEP;
#endif

/* Parse args */

ret = nxscope_parse_args(argc, argv, &env.interval, &interval);
if (ret < 0)
{
nxscope_show_usage(argv[0]);
return EXIT_FAILURE;
}

printf("stream interval = %d\n", env.interval);
printf("main interval = %d\n", interval);

#ifndef CONFIG_NSH_ARCHINIT
/* Perform architecture-specific initialization (if configured) */

Expand Down Expand Up @@ -717,7 +806,7 @@ int main(int argc, FAR char *argv[])
printf("ERROR: nxscope_recv failed %d\n", ret);
}

usleep(CONFIG_EXAMPLES_NXSCOPE_MAIN_INTERVAL);
usleep(interval);
}

errout:
Expand Down
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