This is a small exercise to show your skill and style in embedded C programming.

The exercise exists in the implementation of a non-volatile memory storage component. This component should be able to backup and restore values corresponding to a unique attribute identifier. For the simplicity of the exercise the underlying non-volatile memory (eeprom, flash, ...) can be modelled as a file.

Implement the basic implementation of this component based on following API description:

typedef unsigned char UInt8;
typedef UInt8 gpNvm_AttrId;
typedef UInt8 gpNvm_Result;

gpNvm_Result gpNvm_GetAttribute(gpNvm_AttrId, pLength, UInt8* pValue);
gpNvm_Result gpNvm_SetAttribute(gpNvm_AttrId, attrId, UInt8* attrId, UInt8 length, UInt8* pValue);

Make sure the implementation supports different datatypes for pValue

Some examples:

• Basic datatypes like UInt8 , UInt32 ,...
• An array of UInt8
• Structs like for instance:

#define MAX_LENGTH 20
typedef struct {
UInt8
id;
UInt32 options;
UInt8 length;
UInt8 data[MAX_LENGTH];
} gpTestData_t;

• Extend the basic implementation so it discovers corruptions in the underlying storage.
• Extend the basic implementation so it can recover from corruptions in the underlying storage.
• Extend the your solution with an unit test.