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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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| 80 | mjames | 7 | #if defined SEMIHOSTING |
| 8 | #include <stdio.h> |
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| 9 | extern void initialise_monitor_handles(void); |
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| 10 | #endif |
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| 11 | |||
| 66 | mjames | 12 | #include "libPLX/plx.h" |
| 13 | |||
| 14 | #pragma once |
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| 15 | |||
| 16 | |||
| 17 | #if defined __cplusplus |
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| 18 | extern "C" |
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| 19 | { |
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| 20 | #endif |
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| 21 | #pragma pack(push, 1) |
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| 22 | |||
| 23 | ///\brief State of currently displayed item |
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| 24 | /// this is expected to be packed into 32 bits |
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| 25 | typedef union |
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| 26 | { |
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| 27 | struct |
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| 28 | { |
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| 79 | mjames | 29 | unsigned tag : 8; // dial tag |
| 30 | unsigned : 16; // filler |
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| 31 | int pos: 8; // dial position code |
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| 66 | mjames | 32 | } data; |
| 33 | uint32_t u32; |
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| 34 | } nvram_info_t; |
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| 35 | #pragma pack(pop) |
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| 36 | |||
| 37 | // Allocation of NVRAM words : there are 4k bytes |
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| 38 | #define NVRAM_WORDS (4096 / sizeof(nvram_info_t)) |
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| 39 | |||
| 70 | mjames | 40 | /// @brief Erase every NVRAM entry |
| 41 | extern void erase_nvram(); |
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| 42 | |||
| 43 | /// @brief Save data, replacing any with a matching tag field. |
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| 44 | /// @param data data item to write |
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| 66 | mjames | 45 | extern void write_nvram_data(nvram_info_t data); |
| 46 | |||
| 70 | mjames | 47 | // |
| 48 | /// @brief Find data according to the tag field/ |
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| 49 | /// @param tag tag code to find |
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| 50 | /// @return a pointer to the nvram data with matching tag or NULL if not found |
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| 66 | mjames | 51 | extern nvram_info_t *find_nvram_data(uint8_t tag); |
| 52 | |||
| 53 | #if defined __cplusplus |
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| 54 | } |
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| 55 | #endif |