mirror of
https://github.com/manuelbl/ttn-esp32.git
synced 2025-06-15 04:14:28 +02:00
123 lines
3.6 KiB
C
123 lines
3.6 KiB
C
/*******************************************************************************
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*
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* ttn-esp32 - The Things Network device library for ESP-IDF / SX127x
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*
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* Copyright (c) 2018-2021 Manuel Bleichenbacher
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*
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* Licensed under MIT License
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* https://opensource.org/licenses/MIT
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*
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* Functions for storing and retrieving TTN communication state from NVS.
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*******************************************************************************/
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#include "esp_log.h"
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#include "esp_system.h"
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#include "hal/hal_esp32.h"
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#include "lmic/lmic.h"
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#include "nvs_flash.h"
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#include "ttn_rtc.h"
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#include <string.h>
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#define LMIC_OFFSET(field) __builtin_offsetof(struct lmic_t, field)
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#define LMIC_DIST(field1, field2) (LMIC_OFFSET(field2) - LMIC_OFFSET(field1))
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#define TAG "ttn_nvs"
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#define NVS_FLASH_PARTITION "ttn"
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#define NVS_FLASH_KEY_CHUNK_1 "chunk1"
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#define NVS_FLASH_KEY_CHUNK_2 "chunk2"
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#define NVS_FLASH_KEY_CHUNK_3 "chunk3"
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#define NVS_FLASH_KEY_TIME "time"
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void ttn_nvs_save()
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{
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nvs_handle handle = 0;
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esp_err_t res = nvs_open(NVS_FLASH_PARTITION, NVS_READWRITE, &handle);
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if (res == ESP_ERR_NVS_NOT_INITIALIZED)
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ESP_LOGW(TAG, "NVS storage is not initialized. Call 'nvs_flash_init()' first.");
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if (res != ESP_OK)
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goto done;
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// Save LMIC struct except client, osjob, pendTxData and frame
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size_t len1 = LMIC_DIST(radio, pendTxData);
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res = nvs_set_blob(handle, NVS_FLASH_KEY_CHUNK_1, &LMIC.radio, len1);
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if (res != ESP_OK)
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goto done;
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size_t len2 = LMIC_DIST(pendTxData, frame) - MAX_LEN_PAYLOAD;
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res = nvs_set_blob(handle, NVS_FLASH_KEY_CHUNK_2, (u1_t *)&LMIC.pendTxData + MAX_LEN_PAYLOAD, len2);
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if (res != ESP_OK)
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goto done;
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size_t len3 = sizeof(struct lmic_t) - LMIC_OFFSET(frame) - MAX_LEN_FRAME;
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res = nvs_set_blob(handle, NVS_FLASH_KEY_CHUNK_3, (u1_t *)&LMIC.frame + MAX_LEN_FRAME, len3);
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if (res != ESP_OK)
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goto done;
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res = nvs_set_u32(handle, NVS_FLASH_KEY_TIME, hal_esp32_get_time());
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if (res != ESP_OK)
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goto done;
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res = nvs_commit(handle);
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if (res != ESP_OK)
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goto done;
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done:
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nvs_close(handle);
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ESP_ERROR_CHECK(res);
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}
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bool ttn_nvs_restore(int off_duration)
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{
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nvs_handle handle = 0;
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esp_err_t res = nvs_open(NVS_FLASH_PARTITION, NVS_READWRITE, &handle);
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if (res == ESP_ERR_NVS_NOT_INITIALIZED)
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ESP_LOGW(TAG, "NVS storage is not initialized. Call 'nvs_flash_init()' first.");
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if (res != ESP_OK)
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goto done;
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uint32_t time_val;
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res = nvs_get_u32(handle, NVS_FLASH_KEY_TIME, &time_val);
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if (res != ESP_OK)
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goto done;
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size_t len1 = LMIC_DIST(radio, pendTxData);
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res = nvs_get_blob(handle, NVS_FLASH_KEY_CHUNK_1, &LMIC.radio, &len1);
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if (res != ESP_OK)
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goto done;
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memset(LMIC.pendTxData, 0, MAX_LEN_PAYLOAD);
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size_t len2 = LMIC_DIST(pendTxData, frame) - MAX_LEN_PAYLOAD;
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res = nvs_get_blob(handle, NVS_FLASH_KEY_CHUNK_2, (u1_t *)&LMIC.pendTxData + MAX_LEN_PAYLOAD, &len2);
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if (res != ESP_OK)
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goto done;
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memset(LMIC.frame, 0, MAX_LEN_FRAME);
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size_t len3 = sizeof(struct lmic_t) - LMIC_OFFSET(frame) - MAX_LEN_FRAME;
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res = nvs_get_blob(handle, NVS_FLASH_KEY_CHUNK_3, (u1_t *)&LMIC.frame + MAX_LEN_FRAME, &len3);
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if (res != ESP_OK)
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goto done;
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// invalidate data
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res = nvs_erase_key(handle, NVS_FLASH_KEY_TIME);
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if (res != ESP_OK)
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goto done;
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res = nvs_commit(handle);
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if (res != ESP_OK)
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goto done;
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if (off_duration != 0)
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hal_esp32_set_time(time_val + off_duration * 60);
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done:
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nvs_close(handle);
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if (res != ESP_OK)
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memset(&LMIC.radio, 0, sizeof(LMIC) - LMIC_OFFSET(radio));
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return res == ESP_OK;
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}
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