febcf10911
1. a true wear-leveling kv fs for norflash, especially optimize for some onchip norflash with "write once on one single write unit" like stm32l4, a true "no earse before write" flash algorithm. 2. an "as less as possible" gc strategy, do best to save norflash's life. 3. full "power down protection" support 4. see "examples" of kv, project in "TencentOS_tiny_EVB_MX_Plus", with onchip flash and qspiflash sample.
47 lines
2.0 KiB
C
47 lines
2.0 KiB
C
/*----------------------------------------------------------------------------
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* Tencent is pleased to support the open source community by making TencentOS
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* available.
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*
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* Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
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* If you have downloaded a copy of the TencentOS binary from Tencent, please
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* note that the TencentOS binary is licensed under the BSD 3-Clause License.
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*
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* If you have downloaded a copy of the TencentOS source code from Tencent,
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* please note that TencentOS source code is licensed under the BSD 3-Clause
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* License, except for the third-party components listed below which are
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* subject to different license terms. Your integration of TencentOS into your
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* own projects may require compliance with the BSD 3-Clause License, as well
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* as the other licenses applicable to the third-party components included
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* within TencentOS.
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*---------------------------------------------------------------------------*/
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#ifndef _TOS_KV_FLASH_H_
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#define _TOS_KV_FLASH_H_
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typedef enum kv_flash_program_type_en {
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KV_FLASH_PROGRAM_TYPE_BYTE, /*!< Program byte (8-bit) at a specified address */
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KV_FLASH_PROGRAM_TYPE_HALFWORD, /*!< Program a half-word (16-bit) at a specified address */
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KV_FLASH_PROGRAM_TYPE_WORD, /*!< Program a word (32-bit) at a specified address */
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KV_FLASH_PROGRAM_TYPE_DOUBLEWORD, /*!< Program a double word (64-bit) at a specified address */
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} kv_flash_pgm_type_t;
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typedef int (*kv_flash_write_t)(uint32_t addr, const void *buf, size_t len);
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typedef int (*kv_flash_read_t)(uint32_t addr, void *buf, size_t len);
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typedef int (*kv_flash_erase_t)(uint32_t addr, size_t len);
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typedef struct kv_flash_drv_st {
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kv_flash_write_t write;
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kv_flash_read_t read;
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kv_flash_erase_t erase;
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} kv_flash_drv_t;
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typedef struct kv_flash_property_st {
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uint8_t sector_size_log2;
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kv_flash_pgm_type_t pgm_type;
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uint32_t flash_start;
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uint32_t flash_size;
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} kv_flash_prop_t;
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#endif /* _TOS_KV_FLASH_H_ */
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