Internal EEPROM read write operation of microcontroller use Mikcro C compiler

In this video I am show you how to write and read operation internal EEPROM Memory of PIC16F877A. You can watch the video or read the written tutorial below.

Internal EEPROM in PIC16F877A

PIC16F877A Microcontroller has three type memory.

1. Flash program memory ( 8kB)
2. Data Merory(368 Byte)
3. EEPROM  Memory (256 Byte)

In this tutorial I am describe how to write and read operation of EEPROM Memory. The data EEPROM and Flash Program Memory are readable and writable during mormal operation over the entire Vdd range.EEPROM  abbreviation is Electrically Erasable Programmable Read Only Memory. It is a Non-Volatile and Flash Memory. EEPROM design for high speed and high density at the expense of  large erase blocks and number of write cycles. 

Memory Map of EEPROM

EEPROM Library of Mikro C Pro For PIC

MikroC PRO for PIC includes library for comfortable work with EEPROM.

Library Routine

• EEPROM_Read
• EEPROM_Write

EEPROM Memory Write Opertation

Frist time I am write data, address at 080h to 09Fh and data 0x00 to 0x1F.

code: for(ii=0;ii<32;ii++){                            //  loop for write  EEPROM Memory
                        EEPROM_Write(0x80,ii) ;        // 0x80 is EEPROM Address & ii is data variable
                        }

Second time write data at address 002h and store data 0xAA.

Code: EEPROM_Write(0x02,0xAA);

Third time write data at address 050h and store data 0x55.

Code: EEPROM_Write(0x50,0x55);

EEEPROM Memory Read Operation

First time I read data on PORTB from Memory address 002h and location 2.

Code: EEPROM_Read(0x02);

Data (0xAA)

Second time I read data on PORTC from Memory address 050h and location 80.

Code: EEPROM_Read(0x50);

Data ( 0x55)

third time I read data on PORTD from Memory address (080h - 09Fh) and location (128 - 159).

Code:   for(ii=0;ii<32;ii++){                                                // Read 32 bytes block from address0x80

                         PORTD = EEPROM_Read(0x80+ii);           // and display data on PORTD
                         delay_ms(250);
                         }

Mikro C Code :

	char ii; // loop variable
	void main() {
	TRISB = 0X00; // PORTB is output
	TRISC = 0X00; // PORTC is output
	TRISD = 0X00; // PORTD is output
	PORTB = 0X00; // Clear PORTB
	PORTC = 0X00; // Clear PORTC
	PORTD = 0x00; // Clear PORTD
	for(ii=0;ii<32;ii++) // Fill data buffer
	EEPROM_Write(0x80+ii,ii); // Write data to address 0x80+ii
	EEPROM_Write(0x02,0xAA); // Write data
	EEPROM_Write(0x50,0x55); // Write me data at address 0x50
	delay_ms(1000);
	PORTB = 0XFF; // Blinking PORTB
	PORTC = 0XFF; // Blinking PORTC
	delay_ms(1000);
	PORTB = 0X00;
	PORTC = 0X00;
	delay_ms(1000);
	PORTB = EEPROM_Read(0x02); // read data from address 0x02 and display it on PORTB
	PORTC = EEPROM_Read(0x50); // read data from address 0x50 and display it on PORTB
	delay_ms(1000);
	for(ii=0;ii<32;ii++){ // Read 32 bytes block from address0x80
	PORTD = EEPROM_Read(0x80+ii); // and display data on PORTD
	delay_ms(250);
	}
	}

view raw EEPROM.c hosted with ❤ by GitHub

Program code file and proteus file downlaod For click download button.

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