hal.h

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#ifndef HAL_H
#define HAL_H

#include <stdint.h>

typedef enum {
  ecSuccess  = 0,           
  ecHALError = 0x10000      
} GenericError_t;

typedef enum {
  esSensor    = 0x00000000,   
  esAlgorithm = 0x10000000,   
  esInterface = 0x20000000,   
  esHAL       = 0x30000000,   
} ErrorScope_t;

typedef enum {
  heNoInterface = 1,     
  heNotImplemented,      
  heI2CReadMissing,      
  heI2CWriteMissing,     
  heSleepMissing,        
  heResetMissing         
} HALError_t;


typedef int ( *I2CImpl_t ) ( void*, uint8_t, uint8_t*, int, uint8_t*, int );


typedef struct {
  void*  handle;
  
  I2CImpl_t   i2cRead;
  
  I2CImpl_t   i2cWrite;
  
  void ( *msSleep ) ( uint32_t  ms );

  int  ( *reset ) ( void*  handle );
} Interface_t;


int  HAL_Init ( Interface_t*  hal );

int  HAL_Deinit ( Interface_t*  hal );

void HAL_HandleError ( int  errorCode, void const*  context );

typedef char const*  ( *ErrorStringGenerator_t ) ( int, int, char*, int );

int HAL_SetError ( int  error, int  scope, 
                   ErrorStringGenerator_t  errStrFn );

char const*  HAL_GetErrorInfo ( int*  error, int*  scope, char*  str, int  bufSize );

char const*  HAL_GetErrorString ( int  error, int  scope, char*  str, int  bufSize );

#endif /* HAL_H */