| /* 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_ */ |
