EEPROM

TWELITE This is a procedure for using the built-in EEPROM of the wireless microcontroller.

A maximum of 64x56=3584 bytes are available.

Definitions

#include "eeprom_6x.h"

EEPROM_6X_USER_SIZE	Maximum number of bytes available (64x60 bytes, the remaining space is reserved for the system)
EEPROM_6X_SEGMENT_SIZE	EEPROM segment size (64 bytes)
EEPROM_6X_USER_SEGMENTS	Number of segments in EEPROM

functions

EEP_6x_bRead()

Reads out the EEPROM.

bool_t EEP_6x_bRead(uint16 u16StartAddr, uint16 u16Bytes, uint8 *pu8Buffer);

Arguments

Type	Name	Remark
uint16	u16StartAddr	Read start address (in bytes).
uint16	u16Bytes	Number of bytes to read.
uint8 *	pu8Buffer	Buffer to store the read data.

Returns

Type	Remark
boot_t	If TRUE, the read succeeds; if FALSE, it fails.

EEP_6x_bWrite()

Write to EEPROM.

bool_t EEP_6x_bWrite(uint16 u16StartAddr, uint16 u16Bytes, uint8 *pu8Buffer);

Arguments

Type	Name	Remark
uint16	u16StartAddr	Write start address (in bytes).
uint16	u16Bytes	Number of bytes written.
uint8 *	pu8Buffer	Buffer to store write data.

Returns

Type	Remark
boot_t	If TRUE, the write succeeds; if FALSE, it fails.

Sample code

#include "eeprom_6x.h"

    // read
    if (EEP_6x_bRead(0, sizeof(tsSaveDat), (uint8 *)psSaveDat)) {
    	bRet = TRUE;
    }

    // write
	psSaveDat->u32Magic = FLASH_MAGIC_NUMBER;
	psSaveDat->u8CRC = u8CCITT8((uint8*)&(psSaveDat->sData), sizeof(tsSaveDat));
	if (EEP_6x_bWrite(0, sizeof(tsSaveDat), (uint8 *)psSaveDat)) {
		bRet = TRUE;
	}
	
    // clean up
    uint8 au8buff[EEPROM_6X_SEGMENT_SIZE];
    memset (au8buff, 0xFF, EEPROM_6X_SEGMENT_SIZE);
    bRet = TRUE;
    for (i = 0; i < EEPROM_6X_USER_SEGMENTS; i++) {
		bRet &= EEP_6x_bWrite(i * EEPROM_6X_SEGMENT_SIZE,
		                      EEPROM_6X_SEGMENT_SIZE,
		                      au8buff);
    }