replaced SPIFFS with LITTLEFS

lib/LITTLEFS/src/littlefs_api.c

@@ -0,0 +1,58 @@
+/**
+ * @file littlefs_api.c
+ * @brief Maps the HAL of esp_partition <-> littlefs
+ * @author Brian Pugh
+ */
+
+#define ESP_LOCAL_LOG_LEVEL ESP_LOG_INFO
+
+#include "esp_log.h"
+#include "esp_partition.h"
+#include "esp_vfs.h"
+#include "lfs.h"
+#include "esp_littlefs.h"
+#include "littlefs_api.h"
+
+static const char TAG[] = "esp_littlefs_api";
+
+int littlefs_api_read(const struct lfs_config *c, lfs_block_t block,
+        lfs_off_t off, void *buffer, lfs_size_t size) {
+    esp_littlefs_t * efs = c->context;
+    size_t part_off = (block * c->block_size) + off;
+    esp_err_t err = esp_partition_read(efs->partition, part_off, buffer, size);
+    if (err) {
+        ESP_LOGE(TAG, "failed to read addr %08x, size %08x, err %d", part_off, size, err);
+        return LFS_ERR_IO;
+    }
+    return 0;
+}
+
+int littlefs_api_prog(const struct lfs_config *c, lfs_block_t block,
+        lfs_off_t off, const void *buffer, lfs_size_t size) {
+    esp_littlefs_t * efs = c->context;
+    size_t part_off = (block * c->block_size) + off;
+    esp_err_t err = esp_partition_write(efs->partition, part_off, buffer, size);
+    if (err) {
+        ESP_LOGE(TAG, "failed to write addr %08x, size %08x, err %d", part_off, size, err);
+        return LFS_ERR_IO;
+    }
+    return 0;
+}
+
+int littlefs_api_erase(const struct lfs_config *c, lfs_block_t block) {
+    esp_littlefs_t * efs = c->context;
+    size_t part_off = block * c->block_size;
+    esp_err_t err = esp_partition_erase_range(efs->partition, part_off, c->block_size);
+    if (err) {
+        ESP_LOGE(TAG, "failed to erase addr %08x, size %08x, err %d", part_off, c->block_size, err);
+        return LFS_ERR_IO;
+    }
+    return 0;
+
+}
+
+int littlefs_api_sync(const struct lfs_config *c) {
+    /* Unnecessary for esp-idf */
+    return 0;
+}
+