i have made this code for receive string and store it into an array then comparing it to perform task but its not working.help me to get eny sollution

gk.rajatc — Wed, 06 Oct 2021 22:22:18 GMT

Current Revision posted to Documents by gk.rajatc on 10/6/2021 10:22:18 PM

#ifndef F_CPU

#define F_CPU 8000000UL // 16Mhz clock speed

#endif

#include <avr/io.h>

#include <util/delay.h>

#include <string.h>

//#define USART_BAUDRATE 9600

#define BAUD_PRESCALE (((F_CPU / (USART_BAUDRATE * 16UL))) -1)

#define LED_ON PORTD |= (1<<PIND6);

#define LED_OFF6 PORTD &= ~(1<<PIND6);

volatile unsigned char string[15],x,i =0;

volatile char Reply_CallReady[15]="apple";

volatile char C;

volatile char data[10];

void UART_init(long USART_BAUDRATE)

{

UCSRB |=(1<<RXEN)|(1<<TXEN)|(1<<RXCIE);//TURN ON TRANSMISSION AND RECEPTION.

UCSRC |=(1<<URSEL)|(1<<UCSZ0)|(1<<UCSZ1);//USE 8 BIT CHARACTER.

UBRRL |=(BAUD_PRESCALE);//LOAD LOWER 8 BITS OF THE BAUD RATE VALUE.

UBRRH |=(BAUD_PRESCALE>>8);//LOAD UPPER 8 BIT.

}

unsigned char UART_Rxchar()

{

while((UCSRA & (1<<RXC))==0);//wait till data is received.

return(UDR);//RETURN THE BYTE.

}

void UART_Txchar(char ch)

{

while (!(UCSRA & (1<<UDRE)));//wait for empty transmit buffer.

UDR=ch;

}

void UART_sendstring(char *str)

{

unsigned char j=0;

while(str[j]!=0) // send string till null.

{

UART_Txchar(str[j]);

j++;

}

void lcd_cmd(char cm)

{

char a=cm;

PORTA=a;

PORTB=(0<<PD0)|(0<<PD1)|(1<<PD2);

_delay_ms(50);

PORTB=(0<<PD0)|(0<<PD1)|(0<<PD2);

}

void lcd_data(char dat)

{

char b=dat;

PORTA=b;

PORTB=(1<<PD0)|(0<<PD1)|(1<<PD2);

_delay_ms(50);

PORTB=(1<<PD0)|(0<<PD1)|(0<<PD2);

_delay_ms(50);

}

unsigned char *UART_RX_STR(x)

{

while (x != '\0')

{

string[i++] = x;

}

return string;

}

ISR(USART_RXC_vect)

{

C=UDR;

}

int main()

{

DDRB=0xFF;

DDRA=0xFF;

UART_init(9600);

while(1)

{

C=UART_Rxchar();

x=C;

if (strcmp(string,Reply_CallReady) ==0)

{

LED_ON;

}

else

{

LED_OFF6;

}

Tags: Code Exchange