49 lines
1.0 KiB
C
49 lines
1.0 KiB
C
/* NVS: non volatile storage in flash
|
|
*
|
|
* Copyright (c) 2018 Laczen
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
#ifndef __NVS_PRIV_H_
|
|
#define __NVS_PRIV_H_
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/*
|
|
* MASKS AND SHIFT FOR ADDRESSES
|
|
* an address in nvs is an uint32_t where:
|
|
* high 2 bytes represent the sector number
|
|
* low 2 bytes represent the offset in a sector
|
|
*/
|
|
#define ADDR_SECT_MASK 0xFFFF0000
|
|
#define ADDR_SECT_SHIFT 16
|
|
#define ADDR_OFFS_MASK 0x0000FFFF
|
|
|
|
/*
|
|
* Status return values
|
|
*/
|
|
#define NVS_STATUS_NOSPACE 1
|
|
|
|
#define NVS_BLOCK_SIZE 32
|
|
|
|
/* Allocation Table Entry */
|
|
struct nvs_ate {
|
|
uint16_t id; /* data id */
|
|
uint16_t offset; /* data offset within sector */
|
|
uint16_t len; /* data len within sector */
|
|
uint8_t part; /* part of a multipart data - future extension */
|
|
uint8_t crc8; /* crc8 check of the entry */
|
|
} __packed;
|
|
|
|
BUILD_ASSERT(offsetof(struct nvs_ate, crc8) ==
|
|
sizeof(struct nvs_ate) - sizeof(uint8_t),
|
|
"crc8 must be the last member");
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* __NVS_PRIV_H_ */
|