#include<delay.h>
/*Includes delay.h header file which defines two functions, _delay_ms (millisecond delay) and _delay_us (microsecond delay)*/
#include<hc05.h>
/*Includes hc05.h header file which defines different functions for HC-05 Bluetooth Module. HC-05 header file version is 1.1*/
void main(void)
{
delay_ms(500);
delay_ms(500);
/*Delay of 1s*/
usart_init();
/*USART initialization*/
hc_05_bluetooth_transmit_string("bluetooth tag");
/*Transmits a string to Bluetooth Module*/
hc_05_bluetooth_transmit_byte(0x0d);
/*Transmits Carriage return to Bluetooth Module*/
hc_05_bluetooth_transmit_byte(0x0a);
/*Transmits New Line to Bluetooth Module for new line*/
hc_05_bluetooth_transmit_string("bluetooth module");
/*Transmits a string to Bluetooth Module*/
hc_05_bluetooth_transmit_byte(0x0d);
/*Transmits Carriage return to Bluetooth Module*/
hc_05_bluetooth_transmit_byte(0x0a);
/*Transmits New Line to Bluetooth Module for new line*/
}
/*End of program*/
[/code]
hc05.h
[code]
#ifndef _HC05_H_
//#if HC05_H_
//#define _HC05_H_
#define _HC05_H_ 1
#include<io.h>
#include<delay.h>
#include<usart.h>
#include<string.h>
void main(void)
{
while(1){
char hc_05_buffer1[25], hc_05_buffer2[50];
char temp;
//unsigned char i;
void hc_05_bluetooth_transmit_byte(char data_byte);
char hc_05_bluetooth_receive_byte(void);
void hc_05_bluetooth_transmit_string(char *transmit_string);
void hc_05_bluetooth_transmit_command(char *transmit_string);
char *hc_05_bluetooth_receive_string(char *receive_string, unsigned char terminating_character);
unsigned char hc_05_bluetooth_at_command_mode_test(void);
unsigned char hc_05_bluetooth_device_name_change(char *device_name);
unsigned char hc_05_bluetooth_get_version(void);
unsigned char hc_05_bluetooth_change_baud_rate(long int baud_rate);
unsigned char hc_05_bluetooth_pin_change(char *new_pin);
void hc_05_bluetooth_transmit_byte(char data_byte)
{
usart_data_transmit(data_byte);
}
char hc_05_bluetooth_receive_byte(void)
{
return usart_data_receive();
}
void hc_05_bluetooth_transmit_string(char *transmit_string)
{
usart_string_transmit(transmit_string);
}
char *hc_05_bluetooth_receive_string(char *receive_string, unsigned char terminating_character)
{
unsigned char temp=0x00;
unsigned char i;
for( i=0;;i++)
{
*(receive_string+i)=usart_data_receive();
if(*(receive_string+i)==terminating_character)
break;
else
temp++;
}
*(receive_string+temp)='\0';
return receive_string;
}
unsigned char hc_05_bluetooth_at_command_mode_test(void)
{
UBRRL=12;
delay_ms(500);
usart_string_transmit("AT");
usart_data_transmit(0x0d);
usart_data_transmit(0x0a);
usart_string_receive(hc_05_buffer1,0x0d);
temp=usart_data_receive();
if(!(strcmp(hc_05_buffer1,"OK")))
{
return 1;
}
else
{
return 0;
}
}
unsigned char hc_05_bluetooth_change_baud_rate(long int baud_rate)
{
UBRRL=12;
delay_ms(500);
if(baud_rate==4800)
{
usart_string_transmit("AT+UART=4800,0,0");
}
else if(baud_rate==9600)
{
usart_string_transmit("AT+UART=9600,0,0");
}
else if(baud_rate==19200)
{
usart_string_transmit("AT+UART=19200,0,0");
}
else if(baud_rate==38400)
{
usart_string_transmit("AT+UART=38400,0,0");
}
else if(baud_rate==57600)
{
usart_string_transmit("AT+UART=57600,0,0");
}
else if(baud_rate==115200)
{
usart_string_transmit("AT+UART=115200,0,0");
}
else if(baud_rate==230400)
{
usart_string_transmit("AT+UART=230400,0,0");
}
else if(baud_rate==460800)
{
usart_string_transmit("AT+UART=460800,0,0");
}
else if(baud_rate==921600)
{
usart_string_transmit("AT+UART=921600,0,0");
}
else if(baud_rate==1382400)
{
usart_string_transmit("AT+UART=1382400,0,0");
}
else
{
;
}
usart_data_transmit(0x0d);
usart_data_transmit(0x0a);
usart_string_receive(hc_05_buffer1,13);
temp=usart_data_receive();
if(!(strcmp(hc_05_buffer1,"OK")))
{
return 1;
}
else
{
return 0;
}
}
unsigned char hc_05_bluetooth_device_name_change(char *device_name)
{
UBRRL=12;
delay_ms(500);
usart_string_transmit("AT+NAME=");
usart_string_transmit(device_name);
usart_data_transmit(0x0d);
usart_data_transmit(0x0a);
usart_string_receive(hc_05_buffer1,13);
temp=usart_data_receive();
if(!(strcmp(hc_05_buffer1,"OK")))
{
return 1;
}
else
{
return 0;
}
}
unsigned char hc_05_bluetooth_get_version(void)
{
unsigned char i=9,j=0;
UBRRL=12;
delay_ms(500);
usart_string_transmit("AT+VERSION?");
usart_data_transmit(0x0d);
usart_data_transmit(0x0a);
usart_string_receive(hc_05_buffer2,13);
temp=usart_data_receive();
usart_string_receive(hc_05_buffer1,13);
temp=usart_data_receive();
for(i=9;hc_05_buffer2[i]!=0;i++)
{
hc_05_buffer2[j]=hc_05_buffer2[i];
j++;
}
hc_05_buffer2[j]=0;
if(!(strcmp(hc_05_buffer1,"OK")))
{
return 1;
}
else
{
return 0;
}
}
unsigned char hc_05_bluetooth_pin_change(char *new_pin)
{
UBRRL=12;
delay_ms(500);
usart_string_transmit("AT+PSWD=");
usart_string_transmit(new_pin);
usart_data_transmit(0x0d);
usart_data_transmit(0x0a);
usart_string_receive(hc_05_buffer1,13);
temp=usart_data_receive();
if(!(strcmp(hc_05_buffer1,"OK")))
{
return 1;
}
else
{
return 0;
}
}
}
}
#endif
[/code]
usart.h
[code]
#ifndef _USART_H_
#define _USART_H_ 1
#include<io.h>
#include<delay.h>
#include<string.h>
/*#include
void main(int) {
set_sleep_mode(SLEEP_MODE_IDLE);
sei();
sleep_mode();}
//gcc -std=gnu99 usart.c
// unsigned char i; */
/*The function is declared to initialize the USART with following cinfiguration:-
USART mode - Asynchronous
Baud rate - 9600
Data bits - 8
Stop bit - 1
Parity - No parity.*/
void main(void){
while(1){
void usart_init();
/*The function is declared to transmit data.*/
void usart_data_transmit(unsigned char data );
/*The function is declared to receive data.*/
unsigned char usart_data_receive( void );
/*The function is declared to transmit string.*/
void usart_string_transmit(char *string);
/*The function is declared to receive string.*/
char *usart_string_receive(char *receive_string,unsigned char terminating_character);
/*Function defination*/
void usart_init()
{
UBRRH = 0;
UBRRL =51;
UCSRB|= (1<<RXEN)|(1<<TXEN);
UCSRC |= (1 << URSEL)|(3<<UCSZ0);
}
void usart_data_transmit(unsigned char data )
{
while ( !( UCSRA & (1<<UDRE)) )
;
UDR = data;
}
unsigned char usart_data_receive( void )
{
while ( !(UCSRA & (1<<RXC)) )
;
return UDR;
}
void usart_string_transmit(char *string)
{
while(*string)
{
usart_data_transmit(*string++);
}
}
char *usart_string_receive(char *receive_string,unsigned char
terminating_character)
{
unsigned char temp=0x00;
unsigned char i;
for(i=0;;i++)
{
*(receive_string+i)=usart_data_receive();
if(*(receive_string+i)==terminating_character)
break;
else
temp++;
}
*(receive_string+temp)='\0';
return receive_string;
}
}
}
#endif