Examples/camera Does Not Work Properly When CONFIG_CPUFREQ_RELEASE_LOCK Is Enabled

If you enable CONFIG_CPUFREQ_RELEASE_LOCK in SPRENSE SDK v2.3.0, when you run examples/camera It will stop in the middle of the shooting.

$tools/config.py examples/camera
$ tools /config.py -m
// Enable CONFIG_CPUFREQ_RELEASE_LOCK in menuconfig
$ make

 NuttShell (NSH) NuttX-10.1.0

nsh>camera-jpg1
nximage_listener: Connected
nximage_initialize —Screen resolution (320,240)
Take 1 pictures as JPEG files in /mnt/sd0 after 5 seconds.
 After finishing taking pictures, this app will be finished after 10 seconds.

// remain stationary here

Therefore, examples/camera and examples/power_sleep cannot be used at the same time.

I couldn't find out why it happened.
Are there any restrictions?

spresense

2022-09-29 21:38

1 Answers

I'm not sure why, but if you look at the web document,
About https://developer.sony.com/develop/spresense/docs/arduino_developer_guide_ja.html#_ Clock Mode

Camera function should be operated at CLOCK_MODE_156MHz or CLOCK_MODE_32MHz. https://developer.sony.com/develop/spresense/docs/sdk_developer_guide_ja.html#_cpu_ System Clock Control
Before you move Camera, you can try it if you get an HV lock or an LV lock and raise the clock.

#include<arch/chip/pm.h>

structure pm_cpu_freqlock_lock;

  lock.flag = PM_CPUFREQLOCK_FLAG_LV;
  // or
  // lock.flag = PM_CPUFREQLOCK_FLAG_HV;

  up_pm_acquire_freqlock(&lock);

  // ...camera operation...

  up_pm_release_freqlock(&lock);

2022-09-29 21:38

If you have any answers or tips

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