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examples/capture: support monitor edge change by signal

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add monitor code about edge change

Signed-off-by: dongjiuzhu1 <dongjiuzhu1@xiaomi.com>
This commit is contained in:
dongjiuzhu1 2025-10-24 12:33:00 +08:00 • committed by Xiang Xiao
parent 6830e297cf
commit 150c5756a0
2 changed files with 79 additions and 4 deletions
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1
examples/capture/cap.h
View file

@ -42,6 +42,7 @@ struct cap_example_s
FAR char *devpath; /* Path to the capture device */
unsigned int nloops; /* Collect this number of samples */
unsigned int delay; /* Delay this number of seconds between samples */
int signo; /* Signal number to deliver on isr occur */
};
/****************************************************************************

82
examples/capture/cap_main.c
View file

@ -98,6 +98,10 @@ static void cap_help(void)
printf(" [-p devpath] Capture device path\n");
printf(" [-n samples] Number of samples\n");
printf(" [-t msec] Delay between samples (msec)\n");
#ifdef CONFIG_CAPTURE_NOTIFY
printf(" [-w signo]: Wait for a signal if given "
"otherwise POLL mode if this is an interrupt pin.\n");
#endif
printf(" [-h] Shows this message and exits\n\n");
}
@ -149,6 +153,7 @@ static void parse_args(int argc, FAR char **argv)
g_capexample.nloops = CONFIG_EXAMPLES_CAPTURE_NSAMPLES;
g_capexample.delay = CONFIG_EXAMPLES_CAPTURE_DELAY;
g_capexample.signo = 1;
for (index = 1; index < argc; )
{
@ -191,6 +196,20 @@ static void parse_args(int argc, FAR char **argv)
index += nargs;
break;
#ifdef CONFIG_CAPTURE_NOTIFY
case 'w':
nargs = arg_decimal(&argv[index], &value);
if (value < MIN_SIGNO || value > MAX_SIGNO)
{
printf("Wait signo out of range: %ld\n", value);
exit(1);
}
g_capexample.signo = (int)value;
index += nargs;
break;
#endif
case 'h':
cap_help();
exit(EXIT_SUCCESS);
@ -214,12 +233,17 @@ static void parse_args(int argc, FAR char **argv)
int main(int argc, FAR char *argv[])
{
int8_t dutycycle;
int32_t frequence;
int32_t frequency;
int32_t edges;
int fd;
int exitval = EXIT_SUCCESS;
int ret;
int nloops;
#ifdef CONFIG_CAPTURE_NOTIFY
struct cap_notify_s notify;
struct timespec ts;
sigset_t set;
#endif
/* Set the default values */
@ -242,6 +266,56 @@ int main(int argc, FAR char *argv[])
goto errout;
}
#ifdef CONFIG_CAPTURE_NOTIFY
notify.chan = 0;
notify.type = CAP_TYPE_BOTH;
notify.event.sigev_notify = SIGEV_SIGNAL;
notify.event.sigev_signo = g_capexample.signo;
ret = ioctl(fd, CAPIOC_REGISTER, (unsigned long)&notify);
if (ret < 0)
{
printf("cap_main: ioctl(GPIOC_REGISTER) failed: %d\n", errno);
exitval = EXIT_FAILURE;
goto errout_with_dev;
}
/* Wait up to 5 seconds for the signal */
sigemptyset(&set);
sigaddset(&set, g_capexample.signo);
ts.tv_sec = 5;
ts.tv_nsec = 0;
ret = sigtimedwait(&set, NULL, &ts);
ioctl(fd, CAPIOC_UNREGISTER, notify.chan);
if (ret < 0)
{
int errcode = errno;
if (errcode == EAGAIN)
{
printf("cpu_main: Five second timeout with no signal\n");
exitval = EXIT_FAILURE;
goto errout_with_dev;
}
else
{
printf("cpu_main: ERROR: Failed to wait signal %d "
"from %s: %d\n", g_capexample.signo, g_capexample.devpath,
errcode);
exitval = EXIT_FAILURE;
goto errout_with_dev;
}
}
else
{
printf("cap_main: Received signal %d from %s\n",
g_capexample.signo, g_capexample.devpath);
}
#endif
/* Now loop the appropriate number of times, displaying the collected
* encoder samples.
*/
@ -275,10 +349,10 @@ int main(int argc, FAR char *argv[])
printf("pwm duty cycle: %d %% \n", dutycycle);
}
/* Get the frequence data using the ioctl */
/* Get the frequency data using the ioctl */
ret = ioctl(fd, CAPIOC_FREQUENCE,
(unsigned long)((uintptr_t)&frequence));
(unsigned long)((uintptr_t)&frequency));
if (ret < 0)
{
printf("cap_main: ioctl(CAPIOC_FREQUENCE) failed: %d\n", errno);
@ -290,7 +364,7 @@ int main(int argc, FAR char *argv[])
else
{
printf("pwm frequence: %"PRId32" Hz \n", frequence);
printf("pwm frequency: %"PRId32" Hz \n", frequency);
}
/* Get the edges data using the ioctl */