Interfacing 7SEG with AVR Slicker
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1. This document is owned by nie s ANTECF SOLULIONS www pantechsolutions net i Republishing or redistribution is prohibited rechnology Beyond the Dreams AVR HOW TO GUIDE Interfacing 7SEG with AVR Slicker Contents at a Glance AVR SNCK EY BO ANG sccssiccasvedscvansscecessutarsetencsissccusdecxendssetewccs 3 Seven Segment Display 3 Interfacing Seven Segment Display 4 Interfacing Seven Segment with AVR 1166 5 Pin Assignment With AVR sccsscsscsscsscsscsscsscsscescsscscees 5 Circuit Diagram to Interface 7 segment with AVR Slicker 6 Source Cole 6 C Program to 7 Segment Display using 7 Testing the 12C Seven segment with AVR csscsse 10 General INTORMAtiON icccssiesedacerscsicevesiecsis aa 11 Join the Technical Community Today http www pantechsolutions net AVR Slicker Board The AVR 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 Parallel Printer port ATMEL s AVR Atmega8535 AVR Slicker Kit is proposed to smooth the progress of developing and debugging of various designs encompassing of High speed 8 bit Microcontrollers Seven Segment Display A seven segmen2. 9 Join the Technical Community Today http www pantechsolutions net ten 0 hun if hun gt 9 hun 0 thou if thou gt 9 thou 0 X send_seg thou hun ten single void send_seg unsigned char thou unsigned char hun unsigned char ten unsigned char single if n 1 CNTRL 0x04 DATA a single n 2 delay_ms 5 else if n 2 CNTRL 0x08 DATA a ten n 3 delay_ms 5 else if n 3 CNTRL 0x10 DATA a hun Join the Technical Community Today http www pantechsolutions net n 0 delay_ms 5 else CNTRL 0x20 DATA a thou n 1 delay_ms 5 To compile the above C code you need the CodeVision AVR software The software has it s own IDE and built in AVR gcc Compiler They must be properly installed 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 In CodeVision AVR software you can 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 microcontroller Board Join the Technical Community Today http www pantechsolutions net The AVR Code Blaster software is used to download the hex file into your microcontroller through Parallel port Testing the 12C Seven segment with AVR Give 12V power supply to AVR Slicker Board the four se
3. d 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 finding 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
4. t display is the most basic electronic display device that can display digits from 0 9 The most common configuration has an array of eight LEDs arranged Join the Technical Community Today http www pantechsolutions net in a special pattern to display these digits They are laid out as a Squared off figure 8 Interfacing Seven Segment Display Fig 1 shows how to interface the seven segments with microcontroller A seven segment is generally available in ten pin package While eight pins correspond to the eight LEDs the remaining two pins at middle are common and internally shorted These segments come in configurations namely Common cathode CC and Common anode CA 5V 7 segment Micro controller Fig 1 Interfacing 7segment to Microcontroller Join the Technical Community Today http www pantechsolutions net Interfacing Seven Segment with AVR Slicker We now want to display a four digit number in AVR Slicker Board by using seven segment displays The seven segment display is connected with ARV microcontroller In AVR Slicker Kit 4 nos of common anode seven segment displays are controlled by seven segment drivers Pin Assignment with AVR HARDWARE PIN OUT CONNECTIONS OUTPUT O e PORTB O Connect PORTB with J10 via FRC Cable Digits will be incrementing B PORBI J10 is at Seven Segment Section rom 0 to 9999 D PORB3 oa o Join the Technical Community Today h
5. ttp www pantechsolutions net Circuit Diagram to Interface 7 segment with AVR Slicker FCs lt _ SEG Source Code The Interfacing seven segment displays with AVR program is very simple and straight forward which display a four digit number in seven segment display The C programs are developed in CodeVisionAVR Here we are increment a counter and display this value loaded into seven segment driver in AVR Slicker Board Join the Technical Community Today http www pantechsolutions net C Program to 7 Segment Display using AVR KKK ARK KKK KKK KKK KKK KKK K K K kK K K K K K K K K K K K K K K K K K K K K K K K K K K K K K k K K K K K K K K K K K K K K K K K K kK k kK Title Program to Seven Segment display 2 2K 2K K 2K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K kK kK kK include lt mega8535 h gt include lt delay h gt define CNTRL PORTC define DATA PORTB int x unsigned char thou 0 hun 0 ten 0 single O void send_seg unsigned char unsigned char unsigned char unsigned char unsigned char a 10 OxcO Oxf9 0xa4 0xb0 0x99 0x92 0x82 0xf8 0x80 0x90 unsigned char n 1 void main DDRB Oxff DATA 0x00 DDRC Oxff CNTRL 0x00 while 1 if x 150 x 0 single if single gt 9 single 0 tent if ten gt
6. ven segment display is connected with the AVR Slicker Board First check the entire seven segments LED s are properly working or not Here we are display just 1234 in four seven segment The entire seven segments receive it through Port lines amp display it in order If any data is not coming in seven segments then you just check the entire seven segments LED s are working or not Change the seven segment driver IC amp Check the connections Check the four seven segments connections Otherwise you just check the code with debugging mode in CodeVisionAVR If you want to see more details about debugging just see the videos in below link gt How to create amp Debug a Project in CodeVision AVR Join the Technical Community Today http www pantechsolutions net General Information e For proper working use the components of exact values as shown in Circuit file Wherever possible use new components e Solder everything in a clean way A major problem arises due to improper soldering solder jumps and loose joints e Use the exact value crystal shown in schematic e More instructions are available in following articles gt User Manual of AVR Slicker Board gt How to create amp Debug a Project in CodeVision AVR 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 an
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