Add initial SPIFFS library (#627)

* Add initial SPIFFS library

* Fix Deep Sleep Examples

* Missed one example

libraries/SPIFFS/src/SPIFFS.cpp

@@ -0,0 +1,106 @@
+// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "vfs_api.h"
+
+extern "C" {
+#include <sys/unistd.h>
+#include <sys/stat.h>
+#include <dirent.h>
+#include "esp_spiffs.h"
+}
+#include "SPIFFS.h"
+
+using namespace fs;
+
+SPIFFSFS::SPIFFSFS(FSImplPtr impl)
+    : FS(impl)
+{}
+
+bool SPIFFSFS::begin(bool formatOnFail, const char * basePath, uint8_t maxOpenFiles)
+{
+    if(esp_spiffs_mounted(NULL)){
+        log_w("SPIFFS Already Mounted!");
+        return true;
+    }
+
+    esp_vfs_spiffs_conf_t conf = {
+      .base_path = basePath,
+      .partition_label = NULL,
+      .max_files = maxOpenFiles,
+      .format_if_mount_failed = formatOnFail
+    };
+
+    esp_err_t err = esp_vfs_spiffs_register(&conf);
+    if(err){
+        log_e("Mounting SPIFFS failed! Error: %d", err);
+        return false;
+    }
+    _impl->mountpoint(basePath);
+    return true;
+}
+
+void SPIFFSFS::end()
+{
+    if(esp_spiffs_mounted(NULL)){
+        esp_err_t err = esp_vfs_spiffs_unregister(NULL);
+        if(err){
+            log_e("Unmounting SPIFFS failed! Error: %d", err);
+            return;
+        }
+        _impl->mountpoint(NULL);
+    }
+}
+
+bool SPIFFSFS::format()
+{
+    esp_err_t err = esp_spiffs_format(NULL);
+    if(err){
+        log_e("Formatting SPIFFS failed! Error: %d", err);
+        return false;
+    }
+    return true;
+}
+
+size_t SPIFFSFS::totalBytes()
+{
+    size_t total,used;
+    if(esp_spiffs_info(NULL, &total, &used)){
+        return 0;
+    }
+    return total;
+}
+
+size_t SPIFFSFS::usedBytes()
+{
+    size_t total,used;
+    if(esp_spiffs_info(NULL, &total, &used)){
+        return 0;
+    }
+    return used;
+}
+
+bool SPIFFSFS::exists(const char* path)
+{
+    File f = open(path, "r");
+    return (f == true) && !f.isDirectory();
+}
+
+bool SPIFFSFS::exists(const String& path)
+{
+    return exists(path.c_str());
+}
+
+
+SPIFFSFS SPIFFS = SPIFFSFS(FSImplPtr(new VFSImpl()));

libraries/SPIFFS/src/SPIFFS.h

@@ -0,0 +1,39 @@
+// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+#ifndef _SPIFFS_H_
+#define _SPIFFS_H_
+
+#include "FS.h"
+
+namespace fs
+{
+
+class SPIFFSFS : public FS
+{
+public:
+    SPIFFSFS(FSImplPtr impl);
+    bool begin(bool formatOnFail=false, const char * basePath="/spiffs", uint8_t maxOpenFiles=10);
+    bool format();
+    size_t totalBytes();
+    size_t usedBytes();
+    void end();
+    bool exists(const char* path);
+    bool exists(const String& path);
+};
+
+}
+
+extern fs::SPIFFSFS SPIFFS;
+
+#endif /* _SPIFFS_H_ */