Mbed OS Reference | FlashIAPBlockDevice.h Source File

 /* mbed Microcontroller Library
  * Copyright (c) 2016 ARM Limited
  *
  * 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 MBED_FLASHIAP_BLOCK_DEVICE_H
 #define MBED_FLASHIAP_BLOCK_DEVICE_H
 
 #if DEVICE_FLASH
 
 #include "FlashIAP.h"
 #include "features/storage/blockdevice/BlockDevice.h"
 #include "platform/mbed_toolchain.h"
 
 /** BlockDevice using the FlashIAP API
  *
  */
 class FlashIAPBlockDevice : public mbed::BlockDevice {
 public:
 
     /** Creates a FlashIAPBlockDevice
      *
      *  @param address  Physical address where the block device start
      *  @param size     The block device size
      */
     FlashIAPBlockDevice(uint32_t address = MBED_CONF_FLASHIAP_BLOCK_DEVICE_BASE_ADDRESS,
                         uint32_t size = MBED_CONF_FLASHIAP_BLOCK_DEVICE_SIZE);
 
     virtual ~FlashIAPBlockDevice();
 
     /** Initialize a block device
      *
      *  @return         0 on success or a negative error code on failure
      */
     virtual int init();
 
     /** Deinitialize a block device
      *
      *  @return         0 on success or a negative error code on failure
      */
     virtual int deinit();
 
     /** Read blocks from a block device
      *
      *  @param buffer   Buffer to write blocks to
      *  @param addr     Address of block to begin reading from
      *  @param size     Size to read in bytes, must be a multiple of read block size
      *  @return         0 on success, negative error code on failure
      */
     virtual int read(void *buffer, mbed::bd_addr_t addr, mbed::bd_size_t size);
 
     /** Program blocks to a block device
      *
      *  The blocks must have been erased prior to being programmed
      *
      *  @param buffer   Buffer of data to write to blocks
      *  @param addr     Address of block to begin writing to
      *  @param size     Size to write in bytes, must be a multiple of program block size
      *  @return         0 on success, negative error code on failure
      */
     virtual int program(const void *buffer, mbed::bd_addr_t addr, mbed::bd_size_t size);
 
     /** Erase blocks on a block device
      *
      *  The state of an erased block is undefined until it has been programmed
      *
      *  @param addr     Address of block to begin erasing
      *  @param size     Size to erase in bytes, must be a multiple of erase block size
      *  @return         0 on success, negative error code on failure
      */
     virtual int erase(mbed::bd_addr_t addr, mbed::bd_size_t size);
 
     /** Get the size of a readable block
      *
      *  @return         Size of a readable block in bytes
      */
     virtual mbed::bd_size_t get_read_size() const;
 
     /** Get the size of a programable block
      *
      *  @return         Size of a programable block in bytes
      *  @note Must be a multiple of the read size
      */
     virtual mbed::bd_size_t get_program_size() const;
 
     /** Get the size of a eraseable block
      *
      *  @return         Size of a eraseable block in bytes
      *  @note Must be a multiple of the program size
      */
     virtual mbed::bd_size_t get_erase_size() const;
 
     /** Get the size of an erasable block given address
      *
      *  @param addr     Address within the erasable block
      *  @return         Size of an erasable block in bytes
      *  @note Must be a multiple of the program size
      */
     virtual mbed::bd_size_t get_erase_size(mbed::bd_addr_t addr) const;
 
     /** Get the value of storage when erased
      *
      *  @return         The value of storage when erased
      */
     virtual int get_erase_value() const;
 
     /** Get the total size of the underlying device
      *
      *  @return         Size of the underlying device in bytes
      */
     virtual mbed::bd_size_t size() const;
 
     /** Get the BlockDevice class type.
      *
      *  @return         A string represent the BlockDevice class type.
      */
     virtual const char *get_type() const;
 
     /** Convenience function for checking block erase validity
     *
     *  @param addr     Address of block to begin erasing
     *  @param size     Size to erase in bytes
     *  @return         True if erase is valid for underlying block device
     */
     virtual bool is_valid_erase(bd_addr_t addr, bd_size_t size) const;
 
 
 private:
     // Device configuration
     mbed::FlashIAP _flash;
     mbed::bd_addr_t _base;
     mbed::bd_size_t _size;
     bool _is_initialized;
     uint32_t _init_ref_count;
 };
 
 #endif /* DEVICE_FLASH */
 #endif /* MBED_FLASHIAP_BLOCK_DEVICE_H */
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