now am doing R&D project...need serial communication code...

[ganesh dvk]

hi ,
i have a one problem for serial communication...am using pic16f877a controler...compiler HI-TECH C...am using 3 transmitting kit and one receiving kit...thats all............
3 multiple transmitt path(zigbee) to single(zigbee) receiving path and display the same time.... if its possible or not...pls seniors help me...

 

[sarathsnairpoonjar]

i think its possible.....but i am only familiar with mikroc... i can help u with registers and stuff...

 

[ganesh dvk]

ok..if its possible to send to the code in mikroc.....i convert to my own code...........

 

[Jestin_cubetech]

use Zigbee star topology [single coordinator and multiple end devices].

3 transmitters : end devices
receiver : Coordinator

 

[jjeevan007]

here is code for transmitting and receiving the data using USART of PIC16F877A

transmitting

#include<htc.h>
#include<pic.h>
//#include <pic16f877a.h>
#define _XTAL_FREQ 4000000
 
 
__CONFIG(0x1f3a); 
 
 
void main(void)
{
 
ADCON1 =0x06 ;      // Changes PORTA and PORTE to digital
TRISA = 0x00 ;      // Configure PORTA as output
TRISD = 0X00 ;      // Configure PORTD as output
TRISB = 0x00 ;      // Configure PORTB as output
TRISC = 0x00 ;      // Configure PORTC as output
TRISE = 0x00 ;      // Configure PORTE as output
 
 
SPBRG=25;           //setting the Baud Rate
RCSTA=0X80;         //Enabling the Serial Communication
TXSTA=0X26;         //Enabling Transmission in Serial Communication, Selecting Mode and Speed
 
TXREG='H';
while(TXIF==0 || TRMT==0);
 
TXREG='E';
while(TXIF==0 || TRMT==0);
 
TXREG='L';
while(TXIF==0 || TRMT==0);
 
TXREG='L';
while(TXLIF==0 || TRMT==0);
 
TXREG='O';
while(TXIF==0 || TRMT==0);
 
TXREG=' ';
while(TXIF==0 || TRMT==0);
 
TXREG='T';
while(TXIF==0 || TRMT==0);
 
TXREG='E';
while(TXIF==0 || TRMT==0);
 
TXREG='C';
while(TXIF==0 || TRMT==0);
 
TXREG='H';
while(TXIF==0 || TRMT==0);
 
TXREG='N';
while(TXIF==0 || TRMT==0);
 
TXREG='O';
while(TXIF==0 || TRMT==0);
 
TXREG='L';
while(TXIF==0 || TRMT==0);
 
TXREG='O';
while(TXIF==0 || TRMT==0);
 
TXREG='G';
while(TXIF==0 || TRMT==0);
 
TXREG='Y';
while(TXIF==0 || TRMT==0);
 
 
 
 
 
while(1);
 
}

receiving

/*Serial Receive Program Using PIC16F877A mmicrocontroller
Baud Rate is 9600
PortB - data lines
PortC - control lines
*/


#include<htc.h>

#define _XTAL_FREQ 4000000 	// defines the crystal used


__CONFIG(0x1f3a); 

void ready()
{
	TRISB7=1;
	RB7 = 1;
    RE0=0;
    RE1=1;
    while (RB7==1)
    {
 		RE2=0;
        RE2=1;
    }
	TRISB7=0;
}

//To send the COMMANDS for LCD
void command(unsigned char i)
{ 
 ready();
 PORTB=i;
 RE0=0;
 RE1=0;
 RE2=1;
 RE2=0;
}

//To send the DATA for LCD
void da_dis1(unsigned char i)
{

	ready();
	PORTB=i;
	RE0=1;
	RE1=0;
	RE2=1;
	RE2=0;
}

void lcd_init()
{

command(0x38);
command(0x0e);
command(0x01);
command(0x06);
command(0x80); 
}



void main(void)
{
char i;


ADCON1 =0x06 ; 		// Changes PORTA and PORTE to digital
TRISA = 0x00 ; 		// Configure PORTA as output
TRISD = 0X00 ;		// Configure PORTD as output
TRISB = 0x00 ;		// Configure PORTB as output
TRISC = 0x00 ;		// Configure PORTC as output
TRISE = 0x00 ;		// Configure PORTE as output
TRISC7=1;

lcd_init();

PORTA=0x00;
SPBRG=25;			//setting the baud rate
TXSTA=0x04;			//selecting the Asynchronous mode
RCSTA=0X90;			//Enabling the Serial Communication and Configuration of Receiving Mode

da_dis1('T');
da_dis1('E');
da_dis1('X');
da_dis1('T');
da_dis1(' ');
da_dis1('R');
da_dis1('E');
da_dis1('C');
da_dis1('E');
da_dis1('I');
da_dis1('V');
da_dis1('I');
da_dis1('E');
da_dis1('D');


while(1)
{
	
	if(RCIF==1)
	{
		i=RCREG;
		command(0xc0);
		da_dis1(i);		//Displaying the data Received using UART.
		
	
	}
	if(OERR==1 || FERR==1)		//If any Error Occurred
	{
		CREN=0;
		CREN=1;
			
	}


}





}

 

[ganesh dvk]

ya ya..thanks...........