Non-Volatile Memory
[Device Driver API.]

Collaboration diagram for Non-Volatile Memory:

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Detailed Description

Read data from and write data to non-volatile memory.

Non-volatile data memory is typically used to store configuration settings. Nut/OS currently supports three types of non-volatile storage:

• Intersil X12xx EEPROM, if NUT_CONFIG_X12RTC is defined.
• AT49BV flash sector, if NUT_CONFIG_AT49BV is defined.
• AVR on-chip EEPROM, if Nut/OS has been build for this platform if none of the macros listed above is defined.

Nut/OS uses non-volatile memory to store the _CONFOS structure at location CONFNET_EE_OFFSET and the _CONFNET structure at location CONFNET_EE_OFFSET.

Functions
int	NutNvMemLoad (u_int addr, void *buff, size_t siz)
	Read data from non-volatile memory.
int	NutNvMemSave (u_int addr, CONST void *buff, size_t len)
	Save data in non-volatile memory.

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Function Documentation

int NutNvMemLoad (  u_int  addr, void *  buff, size_t  siz )

Read data from non-volatile memory. This routine provides platform independent access to non-volatile configuration data. Parameters: addr  Location to read from. buff  Pointer to a buffer that receives the data. siz  Number of bytes to read. Returns: 0 on success, -1 otherwise.

int NutNvMemSave (  u_int  addr, CONST void *  buff, size_t  len )

Save data in non-volatile memory. This routine provides platform independent access to non-volatile configuration data. Parameters: addr  Location to write to. buff  Pointer to a buffer that contains the data. len  Number of bytes to write. Returns: 0 on success, -1 otherwise.

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