Easy 2. 4C I2. C Serial EEPROM Interfacing with AVR Microcontrollers. In this turorial we will see how we can easily interface a 2. C series serial. EEPROM with AVR microcontrollers. What is an EEPROM? An EEPROM is kinds of novalatile memory, that means it is used for storing. EEPROM stands for Electrically. Erasable Programmable Read Only Memory.
The advantage of these kind of ROMs. Electrically to make them ready for storing new data. A small amount. of EEPROM is also available internally on the AVR chips. So if the volume of. The internal eeprom makes design small and simple. But if the amount of data you want to store is large, say in order of few tens.
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External EEPROM chip with your AVR. MCU. You can store pictures, sound and long texts in these eeproms. Their are many kinds of EEPROM chip available from many manufactures. One very. common family is 2. C series serial EEPROMs.
They are available upto 1. KB in. size. They uses I2. C interface with host controller (MCU) which is a very popular. I will write more indept tutorial on I2. C in comming. days and in this tutorial I will give you easy to use function that you can. I2. C interface. In this tutorial we will be using 2. C6. 4 EEPROM chip which has 8.
KB = 8. Consider these as storage cells so while storing and retriving data. For exaple if you read location 0. Note. each cell can store 8. BITs of data so range you can store is 0- 2.
You. can use any avr development. Breadboard or Veroboard. Software Setup. Download and add the following files to your AVR Studio project. Now you can. use the following functions for EEPROM interfacing.
Download. Here. EEOpen()Arguments – None. Returns – Nothing.
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Description: This function should be called before any. This functions initialize the communication channel. EEWrite. Byte(unsigned int. The address. must be within the range of EEPROM chip used.
Returns. Description: Use this function to store a 8bit value. EEPROM storage cell. EERead. Byte(unsigned int. Argumentsaddress : from where you want to read data.
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The address. must be within the range of EEPROM chip used. Returns The value stored in the specified EEPROM storage cell.
Description: Use this function to read a 8bit value. EEPROM storage cell. Sample Program. The following sample program demonstrate the use of external EEPROM interfaing.
The program makes use of the LCD. AVRs to display information in a 1. The program. first writes 8.
Kbytes of data to a 2. If the condition. You can use any devboard. ATmega. 16 or ATmega. MCUs. The 2. 4C6. Breadboard. The 5v,GND,SDA,SCL were connected to the x. Board development board./*A sample program to test the Extrenal EEPROM interfacingroutines.
The program fills the whole EEPROM with 7 and then reads the whole EEPROM memory to see if all of themcontains 7. This helps in quick testing of you hardware /software beforeusing these routines in your own programs.
The target for this program is ATmega. ATmega. 16, or ATmega. MHz. If you use slower crystal the program willsimply run slow but without any problems. This program also makes use of e. Xtreme Electronics 1. LCDInterfacing routines. See the related page for more info.
Author : Avinash Gupta. Date : 1. 6 March 2. Mail : me@avinashgupta. Web : www. e. Xtreme.
Electronics. co. in. NOTE: IF YOU USE THIS LIBRARY IN YOUR PROGRAMS AND FINDS IT USEFUL PLEASE MENTION US IN CREDIT AND RECOMEND OTHERS.*/#include < avr/io. The connection is simple.
Connect the LCD to your ATmega. For Finding out location of PINs such as PC7,PC6,PB4 etc see the ATmega. The LCD must be installed to see the output of the program.
After. powering on the circuit please adjust the 1. K POT until the display is clearly.
I strongly recommend you to see the LCD. Interfacing Tutorial and Setup and run some LCD demo code to be sure that. LCD is working correctly. Downloads. All. the required files for 2. C eeprom interfacing with AVR MCUs. From Idea to Finished Product, Just Need One Tool - Easy. EDAFree Circuit Design Software: Start to Design your own PCB Easily.
Cheapest PCB Prototype: Only $2 for 1. We are here to help! The Sopranos Saison 6 Vostfr Download Skype. Post a help request.