Add FS, SD and SD_MMC (#256)

libraries/SD_MMC/src/SD_MMC.cpp

@@ -0,0 +1,97 @@
+// 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_vfs_fat.h"
+#include "driver/sdmmc_host.h"
+#include "driver/sdmmc_defs.h"
+#include "sdmmc_cmd.h"
+}
+#include "SD_MMC.h"
+
+using namespace fs;
+/*
+
+*/
+
+SDMMCFS::SDMMCFS(FSImplPtr impl)
+    : FS(impl), _card(NULL)
+{}
+
+bool SDMMCFS::begin(const char * mountpoint)
+{
+    if(_card) {
+        return true;
+    }
+    //mount
+    sdmmc_slot_config_t slot_config = SDMMC_SLOT_CONFIG_DEFAULT();
+    sdmmc_host_t host = SDMMC_HOST_DEFAULT();
+    host.max_freq_khz = SDMMC_FREQ_HIGHSPEED;
+    //host.flags = SDMMC_HOST_FLAG_1BIT; //use 1-line SD mode
+
+    esp_vfs_fat_sdmmc_mount_config_t mount_config = {
+        .format_if_mount_failed = false,
+        .max_files = 5
+    };
+
+    esp_err_t ret = esp_vfs_fat_sdmmc_mount(mountpoint, &host, &slot_config, &mount_config, &_card);
+    if (ret != ESP_OK) {
+        if (ret == ESP_FAIL) {
+            log_e("Failed to mount filesystem. If you want the card to be formatted, set format_if_mount_failed = true.");
+        } else if (ret == ESP_ERR_INVALID_STATE) {
+            _impl->mountpoint(mountpoint);
+            log_w("SD Already mounted");
+            return true;
+        } else {
+            log_e("Failed to initialize the card (%d). Make sure SD card lines have pull-up resistors in place.", ret);
+        }
+        _card = NULL;
+        return false;
+    }
+    _impl->mountpoint(mountpoint);
+    return true;
+}
+
+void SDMMCFS::end()
+{
+    if(_card) {
+        esp_vfs_fat_sdmmc_unmount();
+        _impl->mountpoint(NULL);
+        _card = NULL;
+    }
+}
+
+sdcard_type_t SDMMCFS::cardType()
+{
+    if(!_card) {
+        return CARD_NONE;
+    }
+    return (_card->ocr & SD_OCR_SDHC_CAP)?CARD_SDHC:CARD_SD;
+}
+
+uint64_t SDMMCFS::cardSize()
+{
+    if(!_card) {
+        return 0;
+    }
+    return (uint64_t)_card->csd.capacity * _card->csd.sector_size;
+}
+
+
+SDMMCFS SD_MMC = SDMMCFS(FSImplPtr(new VFSImpl()));

libraries/SD_MMC/src/SD_MMC.h

@@ -0,0 +1,41 @@
+// 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 _SDMMC_H_
+#define _SDMMC_H_
+
+#include "FS.h"
+#include "driver/sdmmc_types.h"
+#include "sd_defines.h"
+
+namespace fs
+{
+
+class SDMMCFS : public FS
+{
+protected:
+    sdmmc_card_t* _card;
+
+public:
+    SDMMCFS(FSImplPtr impl);
+    bool begin(const char * mountpoint="/sdcard");
+    void end();
+    sdcard_type_t cardType();
+    uint64_t cardSize();
+};
+
+}
+
+extern fs::SDMMCFS SD_MMC;
+
+#endif /* _SDMMC_H_ */

libraries/SD_MMC/src/sd_defines.h

@@ -0,0 +1,25 @@
+// 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 _SD_DEFINES_H_
+#define _SD_DEFINES_H_
+
+typedef enum {
+    CARD_NONE,
+    CARD_MMC,
+    CARD_SD,
+    CARD_SDHC,
+    CARD_UNKNOWN
+} sdcard_type_t;
+
+#endif /* _SD_DISKIO_H_ */