Multiplexed 7 Segment With Timer0 Interrupt in ATmega16/32 for Stopwatch

AVR: Stopwatch With Interrupt Timer and Multiplexed 7 segment Display Here we are connecting the 7 segment display with PORTA, i.e. Multiplexing of six-7segment display, with the control lines to PORTB. Following is the program to Interface the 7segments. Crystal : 8MHz Time: 0.125uSec Prescaler: clk/1025 Timer Interrupt : 25mSec. For 1sec , run this timmer...

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AVR : NotePad Using ATmega16./32 and 16x2 LCD

NotePad Design with Atmega16/32 on 16x2 LCD with UART Here in this program we are designing the notepad by using Atmega16/32 as a controller and LCD for displaying the typed that we will be sending from the help of  UART. In Proteus, with the help of the Virtual Terminal , we will send the data to the uC and the same data will be displayed on the 16x2 LCD in...

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AVR: UART , Keypad and LCD Interfacing in Atmega16

KEYPAD...UART (Universal Asynchronous Receiver Transmitter)...AND LCD (Liquid crystal display) Interfacing with Atmaga16/32 Following code will be defining the processing of the UART (checked in Proteus) with baud rate of 1200 bits/second with internal crystal of the ATmega16. Here we are connecting the Keypad in the PORTC of the uC , LCD on the PORTB and the Virtual terminal...

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AVR : Basic->Interfacing Switch and Seven Segment Display with ATmega16/32 UP/DOWN COUNTER

Here the switch is connected to the PORTB pin no 0 and 1, for Up and Down Counter. The value of the counter will decrease at the time it reaches to max value (i.e. 9). Till then switch 2 will not work. Only access to the switch for making counter in forward direction is allowed. When counter reaches to the 9, switch 1 will stop working and only switch 2 will come into action. /*  *  *  *...

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AVR : Basic->Interfacing Switch and Seven Segment Display with ATmega16/32.

Here the following uses the Switch to be connected on the PORTB, pin no 0 and 1, i.e PB0 and PB1. PORTA is connected with the SEVEN SEGMENT display (common cathode). Switch used here is in Active Low condition. Following is the Program to Interface two switch with SSD. /*  * DAY1QUE1.c  *  * Created: 10/15/13 17:00:24  *  Author: Raj Prajapati  */ #include...

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AVR : Interfacing Seven Segment Dispay (Atmega16/32)

Here we had made use of 7 segment common cathode display for the Interfacing. Along with the Atmega16. Simulation work is done in Proteus Software. Header file: avr is providing its own header filr "avr/io.h"                   for using delay in the avr , we had used util/delay.h This header file can provide the delay in milli...

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LINUX : Writing data to file by reading data from KEYBOARD

Open file , Take input from KEYBOARD, write in the file, Display the content of the file and close the file. /* Program to open the File, read data from the Keyboard and write it in the file.*//* User Progam , to be executed in the user space *//* openfile3.c */// Author : (Raj)#include<stdio.h>#include<fcntl.h>static int count;int main(){    int fd1,i,len;    char buffwr[100],buffr[100];   ...

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LINUX : Opening and Closing the File.

Program to Open a File and Close it , Along with printing the File Discripter value. Program will never return the file discripter value as 0,1,or 2 as these values are already reserved for  0---> Standard Input 1---> Standard Output 2---> Standard Output Here two system calls are used, read and write, you can get the details of it just by typing man read or man write in the terminal window. Save the file in .c extension,...

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Device Driver : Basic Program to make MODULE

Basic program to make the module in Kernel Space and add it into the process Write the program with the file extension ".c" . After that, make the Makefile. Then execute the Makefile by writing make. after that insert the module in the Process by writing insmod <filename>.ko . Then check the Kernel module by writing the command dmesg|less. For removing the module from...

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Device Driver: Char Driver part 1 -> Kernel and Application Program for file handling

Tutorial : Program in a KERNEL to be use by user for open,close,read and write, along with the USER program to access Kernel program, with make file. ----------------------------------------------------------------------------------------------------- /* Program to make a kernel to be accessed by the user */ #include<linux/module.h> #include<linux/kernel.h>...

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