Add ESP-IDF example with SPIFFS

Resolve #472
2021-02-04 23:01:13 +02:00
parent 2546ff6045
commit 55f50dc8ef
13 changed files with 239 additions and 0 deletions
@@ -0,0 +1,73 @@
+/* SPIFFS filesystem example.
+   This example code is in the Public Domain (or CC0 licensed, at your option.)
+
+   Unless required by applicable law or agreed to in writing, this
+   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+   CONDITIONS OF ANY KIND, either express or implied.
+*/
+
+#include <stdio.h>
+#include <string.h>
+#include <sys/unistd.h>
+#include <sys/stat.h>
+#include "esp_err.h"
+#include "esp_log.h"
+#include "esp_spiffs.h"
+
+static const char *TAG = "example";
+
+void app_main(void)
+{
+    ESP_LOGI(TAG, "Initializing SPIFFS");
+    
+    esp_vfs_spiffs_conf_t conf = {
+      .base_path = "/spiffs",
+      .partition_label = NULL,
+      .max_files = 5,
+      .format_if_mount_failed = true
+    };
+    
+    // Use settings defined above to initialize and mount SPIFFS filesystem.
+    // Note: esp_vfs_spiffs_register is an all-in-one convenience function.
+    esp_err_t ret = esp_vfs_spiffs_register(&conf);
+
+    if (ret != ESP_OK) {
+        if (ret == ESP_FAIL) {
+            ESP_LOGE(TAG, "Failed to mount or format filesystem");
+        } else if (ret == ESP_ERR_NOT_FOUND) {
+            ESP_LOGE(TAG, "Failed to find SPIFFS partition");
+        } else {
+            ESP_LOGE(TAG, "Failed to initialize SPIFFS (%s)", esp_err_to_name(ret));
+        }
+        return;
+    }
+    
+    size_t total = 0, used = 0;
+    ret = esp_spiffs_info(conf.partition_label, &total, &used);
+    if (ret != ESP_OK) {
+        ESP_LOGE(TAG, "Failed to get SPIFFS partition information (%s)", esp_err_to_name(ret));
+    } else {
+        ESP_LOGI(TAG, "Partition size: total: %d, used: %d", total, used);
+    }
+
+    // Open renamed file for reading
+    ESP_LOGI(TAG, "Reading file");
+    FILE* f = fopen("/spiffs/hello.txt", "r");
+    if (f == NULL) {
+        ESP_LOGI(TAG, "Failed to open file for reading");
+        return;
+    }
+    char line[64];
+    fgets(line, sizeof(line), f);
+    fclose(f);
+    // strip newline
+    char* pos = strchr(line, '\n');
+    if (pos) {
+        *pos = '\0';
+    }
+    ESP_LOGI(TAG, "Read from file: '%s'", line);
+
+    // All done, unmount partition and disable SPIFFS
+    esp_vfs_spiffs_unregister(conf.partition_label);
+    ESP_LOGI(TAG, "SPIFFS unmounted");
+}