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examples/system/deep_sleep:

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Use nvs instead of RTC_DATA_ATTR to record deep sleep enter time when
the target chip does not have rtc mem.
This commit is contained in:
jingli 2022-07-12 19:00:47 +08:00
parent 001c6f5e86
commit baaef3bd48
1 changed files with 48 additions and 2 deletions
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50
examples/system/deep_sleep/main/deep_sleep_example_main.c
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@ -21,6 +21,14 @@
#include "esp_log.h"
#include "driver/rtc_io.h"
#include "soc/rtc.h"
#include "nvs_flash.h"
#include "nvs.h"
#if SOC_RTC_FAST_MEM_SUPPORTED
static RTC_DATA_ATTR struct timeval sleep_enter_time;
#else
static struct timeval sleep_enter_time;
#endif
#if SOC_TOUCH_SENSOR_SUPPORTED
#include "soc/sens_periph.h"
@ -36,8 +44,6 @@
#endif
#endif
static RTC_DATA_ATTR struct timeval sleep_enter_time;
#ifdef CONFIG_EXAMPLE_TOUCH_WAKEUP
#if CONFIG_IDF_TARGET_ESP32
#define TOUCH_THRESH_NO_USE 0
@ -47,6 +53,35 @@ static void calibrate_touch_pad(touch_pad_t pad);
void app_main(void)
{
/**
* Prefer to use RTC mem instead of NVS to save the deep sleep enter time, unless the chip
* does not support RTC mem(such as esp32c2). Because the time overhead of NVS will cause
* the recorded deep sleep enter time to be not very accurate.
*/
#if !SOC_RTC_FAST_MEM_SUPPORTED
// Initialize NVS
esp_err_t err = nvs_flash_init();
if (err == ESP_ERR_NVS_NO_FREE_PAGES || err == ESP_ERR_NVS_NEW_VERSION_FOUND) {
// NVS partition was truncated and needs to be erased
// Retry nvs_flash_init
ESP_ERROR_CHECK(nvs_flash_erase());
err = nvs_flash_init();
}
ESP_ERROR_CHECK(err);
nvs_handle_t nvs_handle;
err = nvs_open("storage", NVS_READWRITE, &nvs_handle);
if (err != ESP_OK) {
printf("Error (%s) opening NVS handle!\n", esp_err_to_name(err));
} else {
printf("Open NVS done\n");
}
// Get deep sleep enter time
nvs_get_i32(nvs_handle, "slp_enter_sec", (int32_t *)&sleep_enter_time.tv_sec);
nvs_get_i32(nvs_handle, "slp_enter_usec", (int32_t *)&sleep_enter_time.tv_usec);
#endif
struct timeval now;
gettimeofday(&now, NULL);
int sleep_time_ms = (now.tv_sec - sleep_enter_time.tv_sec) * 1000 + (now.tv_usec - sleep_enter_time.tv_usec) / 1000;
@ -226,8 +261,19 @@ void app_main(void)
#endif
printf("Entering deep sleep\n");
// get deep sleep enter time
gettimeofday(&sleep_enter_time, NULL);
#if !SOC_RTC_FAST_MEM_SUPPORTED
// record deep sleep enter time via nvs
ESP_ERROR_CHECK(nvs_set_i32(nvs_handle, "slp_enter_sec", sleep_enter_time.tv_sec));
ESP_ERROR_CHECK(nvs_set_i32(nvs_handle, "slp_enter_usec", sleep_enter_time.tv_usec));
ESP_ERROR_CHECK(nvs_commit(nvs_handle));
nvs_close(nvs_handle);
#endif
// enter deep sleep
esp_deep_sleep_start();
}