Interfacing I2C- EEPROM with PIC16F
Contents
1. http www pantechsolutions net If any data is not coming in Hyper Terminal then you just check the serial cable is working or not Otherwise you just check the code with debugging mode in Mplab If you want to see more details about debugging just see the videos in below link How to create amp Debug a Project in Mplab using PIC16F using Hi Tech Compiler General Information e For proper working use the components of exact values as shown in Circuit file e Solder everything in a clean way A major problem arises due to improper soldering solder jumps and loose joints Use the exact value crystal shown in schematic e More instructions are available in following articles User Manual of PIC16F 18F Slicker Board gt Create amp Debug a project in Mplab using PIC16F877A Join the Technical Community Today http www pantechsolutions net Pantech solutions creates information packed technical documents like this one every month And our website is a rich and trusted resource used by a vibrant online community of more than 1 00 000 members from organization of all shapes and sizes Join the Technical Community Today http www pantechsolutions net What do we sell Our products range from Various Microcontroller development boards DSP Boards FPGA CPLD boards Communication Kits Power electronics Basic electronics Robotics Sensors Electronic components and much more Our goal is to make fi2. putch unsigned char Data transmit data while TXIF 0 TXREG Data void DelayMs unsigned int Ms int delay cust while Ms gt 0 MS for delay cust 0rdelay cust lt 220 delay cust To compile the above C code you need the Mplab software amp Hi Tech Compiler They must be properly set up and a project with correct settings must be created in order to compile the code To compile the above code the C file must be added to the project Join the Technical Community Today http www pantechsolutions net In Mplab you want to develop or debug the project without any hardware setup You must compile the code for generating HEX file In debugging Mode you want to check the port output without PIC16F 18F Slicker Board The PICKIT2 software is used to download the hex file into your microcontroller IC PIC16F877A through USB port Testing the I2C EEPROM with PIC16F877A Give 12V power supply to PIC16F 18F Slicker Board the EEPROM device is connected with the PIC16F 18F Slicker Board First check the entire EEPROM device fixed properly A serial cable is connected between the microcontroller and PC In PC open the Hyper Terminal for displaying the values from EEPROM through I2C The Read amp Write operations are performed in EEPROM with EEPROM address When the EEPROM address is correct then only you can write read and erase data s correctly in EEPROM Join the Technical Community Today
3. CE K CE K K K K include lt pic h gt include lt stdio h gt UONFIG 0 0x3f72 Select HS oscillator BODEN PWRT and disable others define EEPROM CNTRL IN Oxa0 EEPROM address write define EEPROM CNTRL OUT Oxal EEPROM address read define I2C FREQ 100 100khz at 4Mhz define FOSC 10000 10Mhz gt 10000Khz define BAUD RATE 9 6 9600 Baudrate define BAUD VAL char FOSC 16 BAUD RATE i l1 Calculation For 9600 Baudrate 10Mhz unsigned char data 17 I2C Test Program j 2i void void void void void void vod I2CWrite void WaitMSSP void I2CRead void ide init volidi serial init void DelayMs unsigned int main DelayMs 100 Give delay for power up ige znibtij Initialize T2C serial init Setup serial port printrfi XO033IZJ s DelayMs 20 Join the Technical Community Today http www pantechsolutions net I2CWrite Sends the data to I2C EEPROM DelayMs 50 while 1 I2CRead Read back the data s TXREG n 3 while TXIF 0 TRREG r s DelayMs 500 void I2CWrite SEN 1 Send start bit WaitMSSP wait for the operation to be finished SSPBUF EEPROM CNTRL IN Send Slave address write command WaitMSsPi SSPBUF 0x00 Send the starting address to write WaltMSsSP j for i 0 i lt 16 i SSPBUF data i A page contains 16 locations then 16 data s are sent WaitMSSP PEN 1 Sen
4. This document is owned by p An xX y B Oz 4T ye www pantechsolutions net nmas mer actrees men cas n Republishing or redistribution is prohibited ecnnoiogy bcyona the Dreams PIC HOW TO GUIDE Interfacing I2C EEPROM with PIC16F bal Contents at a Glance PIC16F 18F Slicker Board eere eene 3 I2C Inter Integrated Circuit eee eee 3 EEPROM Meum 4 Interfacing 12C EEPROM eere eene nennen nnne 4 Interfacing 12C EEPROM with PIC16F877A 6 Pin Assignment with PIC16F877A e eere 6 Circuit Diagram to Interface I2C EEPROM with PIC16F 7 Source Code crrr EE 7 C Program with 12C EEPROM using PIC16F877A 8 Testing the I2C EEPROM with PIC16F877A 12 General Information s eciss ee bosses esed ese vu Eee eot ve ea REPE EDEN 13 Join the Technical Community Today http www pantechsolutions net PIC16F 18F Slicker Board The PIC16F 18F Slicker board is specifically designed to help students to master the required skills in the area of embedded systems The kit is designed in such way that all the possible features of the microcontroller will be easily used by the students The kit supports in system programming ISP which is done through USB port Microchip s PIC PIC16F877A PIC16F 18F Slicker Kit is proposed to smooth the prog
5. d stop bit WaitMSSP t void I2CRead ine y SEN 1 Send start bit WaitMSSP wait for the operation to be finished SSPBUF EEPROM CNTRL IN Send Slave address write command WaitMSSP Join the Technical Community Today http www pantechsolutions net SSPBUF 0x00 Send the starting address to write WaitMSSP for y 0 y lt 16 y RSEN 1 Send re start bit WaitMSSP SSPBUF EEPROM CNTRL OUT Slave address read command WaitMSSP RCEN 1 Enable receive WaitMssP ACKDT 1 Acknowledge data 1 NACK 0 ACK ACKEN 1 Enable ACK to send PEN 1 jf Stop condition WaitMSSP putch SSPBUF Send the received data to PC DelayMs 30 PEN 1 WaitMSSP void WaitMSSP while SSPIF while SSPIF 0 stay here else exit the loop SSPIF 0 operation completed clear the flag void izo 221451 di TRISC3 1 Set up I2C lines by setting as input TRISC4 1 SSPCON 0x28 SSP port Master mode clock FOSC 4 SSPADD 1 SSPADD FOSC 4 I2C FREQ 1 clock 100khz SSPSTAT 80 Slew rate control disabled Join the Technical Community Today http www pantechsolutions net Void serial inibi TRISC6 1 Enable TX and RX pin for Serial port TRISCT7S1 TXSTA 0x24 Transmit Enable SPBRG BAUD VAL 9600 baud at 10 MHz RCSTA 0x90 Usart Enable Continus receive enable TXIF 1 Make TXREG register empty void
6. gnized by a unique address whether it s a micro controller LCD Driver memory or keyboard interface and can operate as transmitter or receiver based on the functioning of the device The controller designed controls the EEPROM device through I2C protocol The I2C Controller here acts as a master device and controls EEPROM which acts as a slave The read write operations are accomplished by sending a set of control signals including the address and or data bits The control signals must be accompanied with proper clock signals Micra controller Fig 1 Interfacing 12C EEPROM to Microcontroller Join the Technical Community Today http www pantechsolutions net Interfacing 12C EEPROM with PIC16F877A We now want to Read write and Erase EEPROM by using I2C in PIC16F 18F Slicker Board Wiring up an I2C based EEPROM to the 12C port is relatively simple The basic operation of the I2C based EEPROM s is to send a command such as WRITE followed by an address and the data In WRITE operation the EEPROM to store the data In PIC16F 18F Slicker Kit 2 nos of EEPROM lines are controlled by I2C Enabled drivers I2C Lines serial clock of CLK PORTC 3 serial data of DATA PORTC 4 connected to the I2C based serial EEPROM IC The EEPROM read amp write operations are done in PIC16F 18F Slicker Kit by using these SCK amp DATA I2C lines Pin Assignment with PIC16F877A 12C EEPROM PIC16F 18F Lines Serial EEPROM Connections T
7. nding the parts and information you need easier and affordable so you can create awesome projects and training from Basic to Cutting edge technology Join the Technical Community Today http www pantechsolutions net
8. ress of developing and debugging of various designs encompassing of High speed 8 bit Microcontrollers I2C Inter Integrated Circuit The 12C Inter IC bus is a bi directional two wire serial bus that provides a communication link between integrated circuits ICs I2C is a synchronous protocol that allows a master device to initiate communication with a slave device Data is exchanged between these devices Join the Technical Community Today http www pantechsolutions net EEPROM EEPROM electrically erasable programmable read only memory is user modifiable read only memory ROM that can be erased and reprogrammed written to repeatedly through the application of higher than normal electrical voltage It is a type of non volatile memory used in computers and other electronic devices to store small amounts of data that must be saved when power is removed e g calibration tables or device configuration Interfacing 12C EEPROM Fig 1 shows how to interface the EEPROM with microcontroller through I2C I2C is a Master Slave protocol I2C has a clock pulse along with the data Normally the master device controls the clock line SCL This line dictates the timing of all transfers on the I2C bus No data will be transferred unless the clock is manipulated All slaves are controlled by the same clock SCL Join the Technical Community Today http www pantechsolutions net I2c bus supports many devices each device is reco
9. urn ON TXD RXD SCL and MISO Pins of CONFIG switch SW1 Connect Serial cable between USART Section in the Board and PC CLK PORTC 3 AT 24xx DATA PORTC 4 Output The string 12C Test Program will be displayed in Hyper Terminal Join the Technical Community Today http www pantechsolutions net Circuit Diagram to Interface I2C EEPROM with PIC16F PIC16F877A U14 RC3 SCK SCL OSC1 CLKIN RC4 SDI SDA OSC2 CLKOUT Source Code The Interfacing I2C EEPROM with PIC16F877A program is very simple and straight forward that read write and erase operations in EEPROM by using 12C amp the value is displayed in serial port A delay is occurring in every single data read or write in EEPROM The delay depends on compiler how it optimizes the loops as soon as you make changes in the options the delay changes Join the Technical Community Today http www pantechsolutions net C Program with I2C EEPROM using PIC16F877A 2K K K SK K SK SK SK CE K SK SK SK CK CE CE K K K CK CE CE K K SK CK CK CE K SE K CE K SE K K CK CE CE K K CK CK CK CE K SE CK CE CE K K K CK CE CE K K CK CK K CE K SK CK CE CE K K CK CK CE CE K K CK CK K CE K CE K CE CE K K K Title Program to read write amp erase of I2C EEPROM 2K K K SK K SK SK K CE PE SK SK SK CK CE CE K K K SK CE CE K K CK CK K CE K SE CK CE CE SE K K CK CE CE K K CK CK CK CE K K CK CE CE K K CK CK CE CE K K CK CK CK CE K CE K CE CE K K CK CK CE CE K K K CK K CE K
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