COMPUTER OPERATING LED
we can control real world electronics elements using computer with .net s/w. this project is mainly used for Home automation. AVR ATMEGA 16 CODE
/*
* uart_suria.c
*
* Created: 8/12/2015 9:50:06 AM
* Author: suriasarath
*/
#include <avr/io.h>
#include <inttypes.h>
#define F_CPU 8000000UL
char data;
void USARTiint(uint16_t UBRR_VALUE)
{
UBRRL= UBRR_VALUE;
UBRRH=(UBRR_VALUE>>8);
UCSRC=(1<<URSEL)|(3<<UCSZ0);
UCSRB=(1<<TXEN)|(1<<RXEN);
}
char usart_readchar()
{
while(!(UCSRA &(1<<RXC)))
{
}
return UDR;
}
void usart_writechar(char data)
{
while(!(UCSRA & (1<<UDRE)))
{
}
UDR=data;
}
int main(void)
{
char data;
USARTiint(26);
while(1)
{
DDRA=0xff;
data=usart_readchar();
if (data=='a')
{
PORTA|=1<<PA0;
usart_writechar('s');
}
if(data=='q')
{
PORTA&=~1<<PA0;
usart_writechar('d');
}
}
}
Its normal uart code then we write code for vb.net so we can connect using Computer serial port
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