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Multiplexed 7 Segment Displays in a counter
If you have already seen the digital thermometer schematic then by using same circuit diagram you will be able to make your own counter
The Program for the counter is given below while the circuit diagram is same as Digital thermometer withou...
Martix Keypad Interfacing with Microcontrollers: AVR Programming
►Programming AVR Microcontroller ►AVR Assembly Programming for ADC0804
CODE:
.include "8515def.inc" .equ col1 = PINA0 .equ col2 = PINA1 .equ col3 = PINA2 .equ col4 = PINA3.def keyval = r16.def temp = r17.def flags = r18 .equ keyport = PORTA .equ...
►Keypad Connections with AVR Microcontroller
►Keypad Connections with AVR Microcontroller Circuit shown above is for demonstration and does not include any reset
and crystal circuit. For practical use you need to have a reset circuit
and crystal.see connection diagram for 8051...in 8051 secti...
AVR Assembly Programming for ADC0804
Programming AVR Microcontroller ►AVR Assembly Programming for ADC0804;Read the tutorials Programming for ADC0804 interfacing
CODE:
.include "8515def.inc" .equ rd = PORTB0 ;Read signal PortB.0 .equ wr = PORTB1 ;Write Signal Port...
Multiple byte maths
When the 8 bit range is not enough, multiple bytes are needed to
hold a value. Performing mathematical operations on them requires more
work than maths on single bytes. Most of these operations can written
as a macro and then be used just like normal...
Basic Mathematical Operations
Adding/subtracting, multiplying, shifting,
rotating and bit manipulation of registers are essential steps when
calculating addresses, offsets or other values at runtime and when
converting strings to data we want to work on or data to values we c...
MCU Status
The microcontroller operates based on the Status Register (SREG) and
other internal registers or components. Most important is the Status
Register which holds information on the last instruction and its result
and Interrupt enable status.
The SREG...
Flow Charts
Flow Charts
Flow
charts are a graphical representation of code, Program states or even
SRAM contents, if used in a creative way. Once you know how to use them
for code you'll quickly develop your own style to create flow charts
for almo...
Assembler Basics
Assembler is a low-level language which does not know any C-like commands like for{;;} or while{}.
Assembler instructions are small, for example out PortD, r15 writes the contents of register 15 (which in an AVR can
hold one byte) to ...
An asm Introduction And The Embedded
An asm Introduction And The Embedded "Hello World"!!!!
Assembler
is a low-level language. It consists of a list of instructions that are
in no way comparable to anything you might know from C, Basic or
Pascal. The AVR has about 120 of them, depend...