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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 66 | mjames | 1 | /* |
| 2 | * nvram.h |
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| 3 | * |
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| 4 | * Created on: 4 Jun 2017 |
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| 5 | * Author: Mike |
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| 6 | */ |
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| 7 | #include "libPLX/plx.h" |
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| 8 | |||
| 9 | #pragma once |
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| 10 | |||
| 11 | |||
| 12 | #if defined __cplusplus |
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| 13 | extern "C" |
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| 14 | { |
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| 15 | #endif |
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| 16 | #pragma pack(push, 1) |
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| 17 | |||
| 18 | ///\brief State of currently displayed item |
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| 19 | /// this is expected to be packed into 32 bits |
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| 20 | typedef union |
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| 21 | { |
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| 22 | struct |
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| 23 | { |
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| 24 | unsigned tag : 8; |
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| 25 | unsigned : 8; |
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| 26 | enum PLX_Observations observation : 8; |
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| 27 | int instance : 8; |
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| 28 | } data; |
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| 29 | uint32_t u32; |
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| 30 | } nvram_info_t; |
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| 31 | #pragma pack(pop) |
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| 32 | |||
| 33 | // Allocation of NVRAM words : there are 4k bytes |
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| 34 | #define NVRAM_WORDS (4096 / sizeof(nvram_info_t)) |
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| 35 | |||
| 70 | mjames | 36 | /// @brief Erase every NVRAM entry |
| 37 | extern void erase_nvram(); |
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| 38 | |||
| 39 | /// @brief Save data, replacing any with a matching tag field. |
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| 40 | /// @param data data item to write |
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| 66 | mjames | 41 | extern void write_nvram_data(nvram_info_t data); |
| 42 | |||
| 70 | mjames | 43 | // |
| 44 | /// @brief Find data according to the tag field/ |
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| 45 | /// @param tag tag code to find |
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| 46 | /// @return a pointer to the nvram data with matching tag or NULL if not found |
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| 66 | mjames | 47 | extern nvram_info_t *find_nvram_data(uint8_t tag); |
| 48 | |||
| 49 | #if defined __cplusplus |
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| 50 | } |
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| 51 | #endif |