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  1. /*
  2.  * nvram.h
  3.  *
  4.  *  Created on: 4 Jun 2017
  5.  *      Author: Mike
  6.  */
  7. #include "libPLX/plx.h"
  8.  
  9. #pragma once
  10.  
  11.  
  12. #if defined __cplusplus
  13. extern "C"
  14. {
  15. #endif
  16. #pragma pack(push, 1)
  17.  
  18.     ///\brief State of currently displayed item
  19.     /// this is expected to be packed into 32 bits
  20.     typedef union
  21.     {
  22.         struct
  23.         {
  24.             unsigned tag : 8;
  25.             unsigned : 8;
  26.             enum PLX_Observations observation : 8;
  27.             int instance : 8;
  28.         } data;
  29.         uint32_t u32;
  30.     } nvram_info_t;
  31. #pragma pack(pop)
  32.  
  33. // Allocation of NVRAM words : there are 4k bytes
  34. #define NVRAM_WORDS (4096 / sizeof(nvram_info_t))
  35.  
  36.  
  37.     // Save data according to its tag field
  38.     extern void write_nvram_data(nvram_info_t data);
  39.  
  40.     // find data according to the tag field or return null if no info,
  41.     extern nvram_info_t *find_nvram_data(uint8_t tag);
  42.  
  43. #if defined __cplusplus
  44. }
  45. #endif
  46.