/*==============================================================================
Name : eeprom_read
--------------------------------------------------------------------------------
Purpose : Reads data from EEPROM
Input : EEPROM address where the data must be read
Output : 8 Bit data
Notes :
==============================================================================*/
uint8_t eeprom_read(uint16_t ui_address)
{
#if !defined(_ATXMEGA_DEVICE_)
/* FOR TINY / MEGA EEPROM ACCESS */
/* Wait for completion of previous write */
while(EECR & (1<<EEPE));
/* Set up address register */
#if defined ( __ICCAVR__ )
EEAR = ui_address;
#elif defined( __GNUC__ ) /* defined ( __ICCAVR__ ) */
EEARL = ui_address;
#endif /* defined( __GNUC__ ) */
/* Start eeprom read by writing EERE */
EECR |= (1<<EERE);
/* Return data from Data Register */
return EEDR;
#else
/* FOR XMEGA EEPROM ACCESS */
/* Wait for pending NVM operation */
do{} while(( NVM.STATUS & NVM_NVMBUSY_bm ) == NVM_NVMBUSY_bm );
/* Load address for reading */
NVM.ADDR0 = ui_address & 0xFF;
NVM.ADDR1 = (ui_address >> 8) & 0x1F;
NVM.ADDR2 = 0x00;
/* Command - Read EEPROM */
NVM.CMD = NVM_CMD_READ_EEPROM_gc;
/* Command - Execute */
NVM_EXEC();
/* Data available */
return NVM.DATA0;
#endif
}
/*! \brief Flush temporary FLASH page buffer.
*
* This function flushes the FLASH page buffers.
*/
void FLASH_FlushFlasPageBuffer(void)
{
NVM.CMD = NVM_CMD_ERASE_FLASH_BUFFER_gc;
NVM_EXEC();
// Wait until NVM is not busy
FLASH_WaitForNVM();
} // FLASH_FlushFlasPageBuffer
/*==============================================================================
Name : eeprom_write
--------------------------------------------------------------------------------
Purpose : Write data to EEPROM
Input : Address where the data must be saved, data
Output :
Notes :
==============================================================================*/
void eeprom_write(uint16_t ui_address, uint8_t ui_data)
{
#if !defined(_ATXMEGA_DEVICE_)
/* FOR TINY / MEGA EEPROM ACCESS */
/* Wait for completion of previous write */
while(EECR & (1<<EEPE));
/* Set up address and Data Registers */
#if defined ( __ICCAVR__ )
EEAR = ui_address;
#elif defined( __GNUC__ ) /* defined ( __ICCAVR__ ) */
#if defined (__AVR_MEGA__)
EEAR = ui_address;
#else
EEARL = (uint8_t)ui_address;
#endif
#endif /* defined( __GNUC__ ) */
EEDR = ui_data;
EEPROM_WRITE();
#else
/* FOR XMEGA EEPROM ACCESS */
/* Wait for pending NVM operation */
do{} while(( NVM.STATUS & NVM_NVMBUSY_bm ) == NVM_NVMBUSY_bm );
if ((NVM.STATUS & NVM_EELOAD_bm) != 0) {
/* Command - Erase eeprom buffer */
NVM.CMD = NVM_CMD_ERASE_EEPROM_BUFFER_gc;
/* Command - Execute */
NVM_EXEC();
}
/* Command - Load EEPROM buffer */
NVM.CMD = NVM_CMD_LOAD_EEPROM_BUFFER_gc;
/* Load address to write to. */
NVM.ADDR0 = ui_address & 0xFF;
NVM.ADDR1 = (ui_address >> 8) & 0x1F;
NVM.ADDR2 = 0x00;
/* Load data to write */
NVM.DATA0 = ui_data;
/* Load Atomic write command */
NVM.CMD = NVM_CMD_ERASE_WRITE_EEPROM_PAGE_gc;
NVM_EXEC();
/* Wait for pending NVM operation */
do{} while(( NVM.STATUS & NVM_NVMBUSY_bm ) == NVM_NVMBUSY_bm );
#endif
}
