Sergey Pastor / grbl1

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eeprom.c File Reference
Functions

eeprom.c File Reference

Go to the source code of this file.

Functions

unsigned char eeprom_get_char (unsigned int addr)
 Read byte from EEPROM.
void eeprom_put_char (unsigned int addr, unsigned char new_value)
 Write byte to EEPROM.

Detailed Description

Atmel Corporation

  • Supported devices: All devices with split EEPROM erase/write capabilities can be used. The example is written for ATmega48.
  • AppNote: AVR103 - Using the EEPROM Programming Modes.
  • Description: Example on how to use the split EEPROM erase/write capabilities in e.g. ATmega48. All EEPROM programming modes are tested, i.e. Erase+Write, Erase-only and Write-only.
Revision:
1.6
Date:
Friday, February 11, 2005 07:16:44 UTC

Definition in file eeprom.c.

Function Documentation

unsigned char eeprom_get_char ( unsigned int  addr )

Read byte from EEPROM.

This function reads one byte from a given EEPROM address.

Note:
The CPU is halted for 4 clock cycles during EEPROM read.
Parameters:
addrEEPROM address to read from.
Returns:
The byte read from the EEPROM address.

Definition at line 154 of file eeprom.c.

void eeprom_put_char ( unsigned int  addr,
unsigned char  new_value 
)

Write byte to EEPROM.

This function writes one byte to a given EEPROM address. The differences between the existing byte and the new value is used to select the most efficient EEPROM programming mode.

Note:
The CPU is halted for 2 clock cycles during EEPROM programming.
When this function returns, the new EEPROM value is not available until the EEPROM programming time has passed. The EEPE bit in EECR should be polled to check whether the programming is finished.
The EEPROM_GetChar() function checks the EEPE bit automatically.
Parameters:
addrEEPROM address to write to.
new_valueNew EEPROM value.

Definition at line 184 of file eeprom.c.

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