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Save and restore from power off

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Manuel Bl
2021-09-29 16:48:59 +02:00
parent 0130928601
commit f433e826a7
9 changed files with 402 additions and 1 deletions
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123
src/ttn_nvs.c Normal file
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/*******************************************************************************
*
* ttn-esp32 - The Things Network device library for ESP-IDF / SX127x
*
* Copyright (c) 2018-2021 Manuel Bleichenbacher
*
* Licensed under MIT License
* https://opensource.org/licenses/MIT
*
* Functions for storing and retrieving TTN communication state from NVS.
*******************************************************************************/
#include "esp_log.h"
#include "esp_system.h"
#include "hal/hal_esp32.h"
#include "lmic/lmic.h"
#include "nvs_flash.h"
#include "ttn_rtc.h"
#include <string.h>
#define LMIC_OFFSET(field) __builtin_offsetof(struct lmic_t, field)
#define LMIC_DIST(field1, field2) (LMIC_OFFSET(field2) - LMIC_OFFSET(field1))
#define TAG "ttn_nvs"
#define NVS_FLASH_PARTITION "ttn"
#define NVS_FLASH_KEY_CHUNK_1 "chunk1"
#define NVS_FLASH_KEY_CHUNK_2 "chunk2"
#define NVS_FLASH_KEY_CHUNK_3 "chunk3"
#define NVS_FLASH_KEY_TIME "time"
void ttn_nvs_save()
{
nvs_handle handle = 0;
esp_err_t res = nvs_open(NVS_FLASH_PARTITION, NVS_READWRITE, &handle);
if (res != ESP_OK)
goto done;
// Save LMIC struct except client, osjob, pendTxData and frame
size_t len1 = LMIC_DIST(radio, pendTxData);
res = nvs_set_blob(handle, NVS_FLASH_KEY_CHUNK_1, &LMIC.radio, len1);
if (res != ESP_OK)
goto done;
size_t len2 = LMIC_DIST(pendTxData, frame) - MAX_LEN_PAYLOAD;
res = nvs_set_blob(handle, NVS_FLASH_KEY_CHUNK_2, (u1_t *)&LMIC.pendTxData + MAX_LEN_PAYLOAD, len2);
if (res != ESP_OK)
goto done;
size_t len3 = sizeof(struct lmic_t) - LMIC_OFFSET(frame) - MAX_LEN_FRAME;
res = nvs_set_blob(handle, NVS_FLASH_KEY_CHUNK_3, (u1_t *)&LMIC.frame + MAX_LEN_FRAME, len3);
if (res != ESP_OK)
goto done;
res = nvs_set_u32(handle, NVS_FLASH_KEY_TIME, hal_esp32_get_time());
if (res != ESP_OK)
goto done;
res = nvs_commit(handle);
if (res != ESP_OK)
goto done;
done:
nvs_close(handle);
if (res == ESP_ERR_NVS_NOT_INITIALIZED)
{
ESP_LOGW(TAG, "NVS storage is not initialized. Call 'nvs_flash_init()' first.");
}
else
{
ESP_ERROR_CHECK(res);
}
}
bool ttn_nvs_restore(int off_duration)
{
nvs_handle handle = 0;
esp_err_t res = nvs_open(NVS_FLASH_PARTITION, NVS_READWRITE, &handle);
if (res != ESP_OK)
goto done;
uint32_t time_val;
res = nvs_get_u32(handle, NVS_FLASH_KEY_TIME, &time_val);
if (res != ESP_OK)
goto done;
size_t len1 = LMIC_DIST(radio, pendTxData);
res = nvs_get_blob(handle, NVS_FLASH_KEY_CHUNK_1, &LMIC.radio, &len1);
if (res != ESP_OK)
goto done;
size_t len2 = LMIC_DIST(pendTxData, frame) - MAX_LEN_PAYLOAD;
res = nvs_get_blob(handle, NVS_FLASH_KEY_CHUNK_2, (u1_t *)&LMIC.pendTxData + MAX_LEN_PAYLOAD, &len2);
if (res != ESP_OK)
goto done;
size_t len3 = sizeof(struct lmic_t) - LMIC_OFFSET(frame) - MAX_LEN_FRAME;
res = nvs_get_blob(handle, NVS_FLASH_KEY_CHUNK_3, (u1_t *)&LMIC.frame + MAX_LEN_FRAME, &len3);
if (res != ESP_OK)
goto done;
// invalidate data
res = nvs_erase_key(handle, NVS_FLASH_KEY_TIME);
if (res != ESP_OK)
goto done;
res = nvs_commit(handle);
if (res != ESP_OK)
goto done;
if (off_duration != 0)
hal_esp32_set_time(time_val + off_duration * 60);
done:
nvs_close(handle);
if (res == ESP_ERR_NVS_NOT_INITIALIZED)
{
ESP_LOGW(TAG, "NVS storage is not initialized. Call 'nvs_flash_init()' first.");
}
return res == ESP_OK;
}