EEPROM Revision as of 19:09, 25 December 2014 by Explorer (Talk | contribs) (diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

EEPROM

EEPROM_WriteByte

{{#Widget:LibTable}}

Defination	void EEPROM_WriteByte(uint16_t v_eepromAddress_u16, uint8_t v_eepromData_u8)
Input Arguments	uint16_t: eeprom_address at which eeprom_data is to be written. uint8_t: byte of data to be to be written in eeprom.
Return Value	none
Description	This function is used to write the data at specified EEPROM_address..
Usage	EEPROM_WriteByte(1234,25); //Writes 25 at the eeprom address 1234.

EEPROM_WriteNBytes

{{#Widget:LibTable}}

Defination	void EEPROM_WriteNBytes(uint16_t v_eepromAddress_u16, uint8_t *p_ramAddress_u8, uint16_t v_numOfBytes_u16)
Input Arguments	uint16_t,: eeprom_address from where the N-bytes are to be written. uint8_t*: Pointer to the N-bytes of data to be written. uint16_t : Number of bytes to be written
Return Value	none
Description	This function is used to write N-bytes of data at specified EEPROM_address.
Usage	uint8_t A_RamBuffer_U8[5]={10,20,30,40,50}; // Buffer containing the data to be written in Eeprom EEPROM_WriteNBytes(100,A_RamBuffer_U8,5); //Copies 5bytes of data from A_RamBuffer_U8 into eeprom location 100.

EEPROM_WriteString

{{#Widget:LibTable}}

Defination	void EEPROM_WriteString(uint16_t v_eepromAddress_u16, char *p_stringPointer_u8)
Input Arguments	uint16_t: eeprom_address where the String is to be written. char*: Pointer to String which has to be written.
Return Value	none
Description	This function is used to Write a String at specified EEPROM_address.NOTE: Null char is also written into the eeprom.
Usage	uint8_t A_StringBuffer_U8[20]="Hello, World"; // String to be written in eeprom EEPROM_WriteString(50,A_StringBuffer_U8); //Copies "Hello, World" along with NULL character into eeprom location 50.

EEPROM_Erase

{{#Widget:LibTable}}

Defination	void EEPROM_Erase()
Input Arguments	none
Return Value	none
Description	This function is used to erase the entire Eeprom memory. Complete Eeprom(C_MaxEepromSize_U16) is filled with 0xFF to accomplish the Eeprom Erase.
Usage	EEPROM_Erase(); //Erases the complete(C_MaxEepromSize_U16 bytes) eeprom.

EEPROM_ReadByte

{{#Widget:LibTable}}

Defination	uint8_t EEPROM_ReadByte(uint16_t v_eepromAddress_u16)
Input Arguments	uint16_t: eeprom_address from where eeprom_data is to be read.
Return Value	uint8_t: data read from Eeprom.
Description	This function is used to read a byte of data from specified EEPROM_address.
Usage	eeprom_data = EEPROM_ReadByte(100); reads the data from eeprom location 100 which is copied to eeprom_data

EEPROM_ReadNBytes

{{#Widget:LibTable}}

Defination	void EEPROM_ReadNBytes(uint16_t v_eepromAddress_16, uint8_t *p_ramAddress_u8, uint16_t v_numOfBytes_u16)
Input Arguments	uint16_t,: eeprom_address from where the N-bytes is to be read. uint8_t*: Pointer into which the N-bytes of data is to be read. uint16_t : Number of bytes to be Read
Return Value	none
Description	This function is used to Read N-bytes of data from specified EEPROM_address. The data read from the eeprom will be copied into the specified RamAddress . Note:Care should be taken to allocate enough buffer to read the data.
Usage	uint8_t A_RamBuffer_U8[20]; // Buffer to read the Eeprom data EEPROM_ReadNBytes(1000,A_RamBuffer_U8,20); //Copies 20bytes of eeprom data(address 1000) into A_RamBuffer_U8

EEPROM_ReadString

{{#Widget:LibTable}}

Defination	void EEPROM_ReadString(uint16_t v_eepromAddress_u16, char *p_destStringAddress_u8)
Input Arguments	uint16_t: eeprom_address from where the String is to be read. char*: Pointer into which the String is to be read.
Return Value	none
Description	This function is used to Read a String from specified EEPROM_address.The string read from eeprom will be copied to specified buffer along with NULL character.
Usage	uint8_t A_StringBuffer_U8[20]; // Buffer to read the Eeprom data EEPROM_ReadString(200,A_StringBuffer_U8); //Copies a string from eeprom(address 200) along with NULL caharacter into A_StringBuffer_U8

user guide

/* Program to blink the LEDs using delay routines*/
 
#include<reg52.h>
#include "delay.h"   //User defined library which contains the delay routines
 
 
 
int  main()
{
 
 
	while(1)
	{
		PO = 0xff;      /* Turn ON the LEDs */
		DELAY_us(10);   /* Generate the delay of 1sec+10ms+10us */
		DELAY_ms(10);
		DELAY_sec(1);
 
		P0 = 0x00;     /* Turn OFF the LEDs */
		DELAY_us(10);  /* Generate the delay of 1sec+10ms+10us */
		DELAY_ms(10);
		DELAY_sec(1);
 
	}
 
	return 0;
}