pic16f877a spi communication

[sairyuva]

i want to communicate 2 pic16f877a with spi protocol
i couldn't get far with this code

/****spi stuff***/
/*master @ 20MHz*/

#include<htc.h>


__CONFIG(HS & BORDIS & LVPDIS & PWRTEN & WDTDIS);

unsigned char data=0xff;

void init()
{
	SSPEN=1;
	TRISC5=0;	//sd0	
	TRISC3=0;	//sck
	TRISC4=1;
	SMP=1;
	CKE=1;
	SSPCON=0x30;
	TRISB=0x00;
	PORTB=0x00;
	SSPIF=0;
	ei();
	PEIE=1;
	SSPIE=1;
	
}

void main()
{
	init();
	while(1)
	{
		PORTB=data;
		while(BF);
		SSPBUF=data;
	}
}

void interrupt isr(void)
{
	if(SSPIF)
	{
		SSPIF=0;
		BF=0;
	}
}

/****spi stuff***/
/*slave @ 20MHz*/

#include<htc.h>


__CONFIG(HS & BORDIS & LVPDIS & PWRTEN & WDTDIS);

unsigned char data;

void init()
{
	
	TRISC5=0;	//sd0	
	TRISC3=1;	//sck
	TRISC4=1;
	SMP=0;
	CKE=1;
	SSPCON=0x30;
	SSPEN=1;
	SMP=0;
	TRISB=0x00;
	PORTB=0x00;
	SSPOV=0;
	SSPIF=0;
	ei();
	PEIE=1;
	SSPIE=1;
	
}

void main()
{
	init();
	while(1)
	{	
		if(BF)
			data=SSPBUF;
		BF=0;	
		PORTB=data;
	}	
}

void interrupt isr(void)
{
	if(SSPIF)
	{
	//	if(BF)
			
	}
SSPIF=0;
}

 

[Sridutt]

Can I get to know what problem you are facing, I am trying to do same but the problem is the Txn stops when the first Transmission is completes.

 

[madhusuthanan]

you missed the pull up resistor at pin 23 & 24.