main/nvsio.c

/*****************************************************************************
 * Copyright (C) 2023
 *
 * Michiel Broek <mbroek at mbse dot eu>
 *
 * This file is part of the ESP32 iotbalkon application.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2, or (at your option) any
 * later version.
 *
 * mbsePi-apps is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with ThermFerm; see the file COPYING.  If not, write to the Free
 * Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
 *****************************************************************************/

#include "config.h"

#define	NVSIO_Namespace			"balkon"

static const char *TAG = "nvsio";


void nvsio_init(void)
{
    esp_err_t		err = ESP_OK;
    nvs_handle_t	my_handle;

    err = nvs_open(NVSIO_Namespace, NVS_READWRITE, &my_handle);
    if (err != ESP_OK) {
        ESP_LOGE(TAG, "Error (%s) opening NVS handle '%s'", esp_err_to_name(err), NVSIO_Namespace);
    } else {
        nvs_commit(my_handle);
        nvs_close(my_handle);
    }
}


uint8_t nvsio_read_u8(char *key)
{
    nvs_handle_t	my_handle;
    esp_err_t		err;
    uint8_t		val = 0;

    if (nvs_open(NVSIO_Namespace, NVS_READWRITE, &my_handle) == ESP_OK) {
	err = nvs_get_u8(my_handle, key, &val);
	if (err == ESP_ERR_NVS_NOT_FOUND) {
	    err = nvs_set_u8(my_handle, key, 0);
	    val = 0;
	    nvs_commit(my_handle);
	    ESP_LOGI(TAG, "nvsio_read_u8(%s) created", key);
	}
	if (err != ESP_OK) {
            ESP_LOGE(TAG, "nvsio_read_u8(%s) Error (%s) opening NVS namespace '%s'", key, esp_err_to_name(err), NVSIO_Namespace);
        }
	nvs_close(my_handle);
    }

    return val;
}


void nvsio_write_u8(char *key, uint8_t val)
{
    nvs_handle_t	my_handle;
    esp_err_t		err;
    uint8_t		tmp;

    if (nvs_open(NVSIO_Namespace, NVS_READWRITE, &my_handle) == ESP_OK) {
	err = nvs_get_u8(my_handle, key, &tmp);
	if (err == ESP_ERR_NVS_NOT_FOUND) {
	    nvs_set_u8(my_handle, key, val);
	    nvs_commit(my_handle);
	    ESP_LOGI(TAG, "nvsio_write_u8(%s) created val %02x", key, val);
	} else if (err == ESP_OK && tmp != val) {
	    nvs_set_u8(my_handle, key, val);
	    nvs_commit(my_handle);
	    ESP_LOGI(TAG, "nvsio_write_u8(%s) updated val %02x", key, val);
	}
	nvs_close(my_handle);
    }
}


uint32_t nvsio_read_u32(char *key)
{
    nvs_handle_t        my_handle;
    esp_err_t           err;
    uint32_t		val = 0;

    if (nvs_open(NVSIO_Namespace, NVS_READWRITE, &my_handle) == ESP_OK) {
        err = nvs_get_u32(my_handle, key, &val);
        if (err == ESP_ERR_NVS_NOT_FOUND) {
            err = nvs_set_u32(my_handle, key, 0);
            val = 0;
            nvs_commit(my_handle);
            ESP_LOGI(TAG, "nvsio_read_u32(%s) created", key);
        }
        if (err != ESP_OK) {
            ESP_LOGE(TAG, "nvsio_read_u32(%s) Error (%s) opening NVS namespace '%s'", key, esp_err_to_name(err), NVSIO_Namespace);
        }
        nvs_close(my_handle);
    }

    return val;
}


void nvsio_write_u32(char *key, uint32_t val)
{
    nvs_handle_t        my_handle;
    esp_err_t           err;
    uint32_t		tmp;

    if (nvs_open(NVSIO_Namespace, NVS_READWRITE, &my_handle) == ESP_OK) {
        err = nvs_get_u32(my_handle, key, &tmp);
        if (err == ESP_ERR_NVS_NOT_FOUND) {
            nvs_set_u32(my_handle, key, val);
            nvs_commit(my_handle);
            ESP_LOGI(TAG, "nvsio_write_u32(%s) created val %08lx", key, val);
        } else if (err == ESP_OK && tmp != val) {
            nvs_set_u32(my_handle, key, val);
            nvs_commit(my_handle);
            ESP_LOGI(TAG, "nvsio_write_u32(%s) updated val %08lx", key, val);
        }
        nvs_close(my_handle);
    }
}