Urgent HElp require plzzz in Spi commiicaTION USEIN two PIC

[AmmarAkhlaq]

I am try to communicate b/w two pic18f452:
I am sending package of data from master. slave should receive it properly. and send back data according to the received one:
here problem is I am getting data for some value like when I call the function:
sent_data(10,20,30);
I received it correctly but when I sent:
sent_data(150,180,180);
I am not receiving it communication is not establishing.
I need to received data correctly all the time.
PLZZZZZ help me out I extreme need plzzzz
plzz tell me what iam doing wrong I am using MicroC for coding

here is my master:

unsigned char theta1,theta2,theta3,Count2,Count3,datain,intiCom, ready,Thetax=0,Thetay,Thetaz,x,y,z1,reset;
unsigned char Write(char dataout);
void mapInput();
void SysInit();
void sent_data(unsigned char Theta1 ,unsigned char Theta2 , unsigned char Theta3 );
void main(){
SysInit();
intiCom=0;
PORTB=0xFF;
delay_ms(1000);
PORTB=0x00;
intiCom=Write(0x0F); // inititalize the communication: 1
//Send 0x0F if reviced is F0 the Communication line is stablish
PORTB = intiCom;
Delay_ms(500);
if(intiCom==0xF0)
{
while(1)
{
sent_data(150,180,180);
}
}


}
unsigned char Write(unsigned char dataout)
{
PORTD = dataout;
PORTC.B2=0; // SS select low slave is selected port C pin 2
delay_ms(10); // wait
SPI1_Write(dataout); // transmit the dataout
//while(SSPSTAT.BF); // wait till end of data transmission
delay_ms(50); // wait.
PORTC.B2=1;
return SSPBUF;
}
void SysInit()
{
TRISA=0xFF; // configure Port A as input
ADCON1=0x06;// disable ADC and make all the pins of Port A as digital input.
TRISD=0x00; // configure Port D as output
PORTD=0x00; // Clear all pin of Port D
TRISB=0x00; // configure Port B as output
PORTB=0x00; // Clear all pin of Port B
TRISC.B2=0; // Output for Slave select
TRISC.B3=0; // SCK output
TRISC.B4=1; // SDI input
TRISC.B5=0; // SDO output
PORTC.B2=1; // SS select high no slave is select
//Set SPI1 module to master mode, clock = Fosc/4, data sampled at the middle of interval,
//clock idle state low and data transmitted at low to high edge:
SPI1_Init_Advanced(_SPI_MASTER_OSC_DIV4, _SPI_DATA_SAMPLE_MIDDLE, _SPI_CLK_IDLE_LOW, _SPI_LOW_2_HIGH); // Setup the spi
}

void sent_data(unsigned char Theta1 ,unsigned char Theta2 , unsigned char Theta3 )
{

ready=Write(0x10); //2
Delay_ms(50);
if(ready==0x70)
{
Thetax=Write(Theta1); //3
// PORTB=Thetax;
Delay_ms(50);
}
if(Thetax==0x30)
{
x=Write(0x05); //4
//PORTB=x;
Delay_ms(50);
}
if(x==0x40)
{
Thetay=Write(Theta2); //5
//PORTB=Thetay;
Delay_ms(50);
}
if(Thetay==0x50)
{
y=Write(0x06); //6
//PORTB=y;
Delay_ms(50);
}
if(y==0x60)
{
Thetaz=Write(Theta3); //7
//PORTB=Thetaz;
Delay_ms(50);
}
if(Thetaz==0x80)
{
z1=Write(0x08); //8
//PORTB=z1;
Delay_ms(50);
}
if((z1==0x90)&&(y==0x60)&&(x==0x40))
{
reset= Write(0x09); //9
z1=0;
y=0;
x=0;
Thetaz=0;
Thetay=0;
Thetax=0;
ready=0;
PORTB=Theta3;

}

}

here is salve code:


unsigned char Received(unsigned short dataout);
unsigned short datain,dataout;
unsigned char intiCom=0,ready=0,Thetax=0,x,Thetay,y,Thetaz,z1,up date;
void SysInit();
void InitTimer1();
void Interrupt();
void mydelay_10us(long int a);
unsigned long int total,high1,high2,high3,low,theta1,Required_delay1 =0,theta2;
unsigned long int Required_delay2=0,theta3,Required_delay3=0;
void main() {
//InitTimer1();
SysInit();
intiCom=0;
intiCom=Received(0xF0); //1
// inititalize the communication:
// Send 0x0F if reviced is F0 the Communication line is stablish

while(1)
{
ready=Received(0x70); //2 Ready for communication
//PORTB=ready;
if(ready==0x10)
{
Thetax= Received(0x30); //3 recive theta 1 is ready
//PORTB=Thetax;
delay_ms(30);
x = Received(0x40); //4 conform that Theta 1 has been recived
}
if(x==0x05)
{
Thetay=Received(0x50); //5 recive theta2 if reception of theta 1 is conformed
// PORTB=Thetay;
delay_ms(30);
y= Received(0x60); //6 conform that Theta 2 has been recived
}
if(y==0x06)
{
Thetaz=Received(0x80); //7 recive theta3 if reception of theta 2 is conformed
//PORTB=Thetaz;
delay_ms(30);
z1 = Received(0x90); // 8 conform that Theta 3 has been recived
}
if((z1==0x08)&&(y==0x06)&&(x==0x05)) // after conformation of all the theta 1 2 3
{
update=Received(0xA0); //9 if update comand is revieced the chage the value of angles.
delay_ms(30);
if(update==0x09)
{
theta1=(long int)Thetax;
theta2=(long int)Thetay;
theta3=(long int)Thetaz;
update=0;
z1=0;
y=0;
x=0;
ready=0;
PORTB=theta3;
}
}
}
}

unsigned char Received(unsigned short dataout)
{
while(SSPSTAT.BF);
datain= SPI1_Read(dataout);
delay_ms(60);
//PORTD=dataout;
//PORTB=datain;
return datain;
}
void SysInit()
{
ADCON1=0x06; // disable ADC and make all the pins of Port A as digital input
TRISA=0xFF;
PORTA=0x00;
TRISB=0x00;
PORTB=0x00;
TRISD=0x00;
PORTD=0x00;
TRISC.B6=0;
TRISC.B7=0;
TRISC.B4=1; //SDI input
TRISC.B3=1; //SCK input from master
TRISC.B5=0; //SDO output
SSPSTAT.SMP=0; //input data sampled at middle
SSPSTAT.CKE=0; // transition from idle to active
SPI1_Init_Advanced(_SPI_SLAVE_SS_ENABLE, _SPI_DATA_SAMPLE_MIDDLE, _SPI_CLK_IDLE_LOW, _SPI_LOW_2_HIGH);
}



Always looking for source of knowledge

[petar.timotijevic]

Hello Ammar and welcome to the MikroE forum,

Please see examples on http://www.libstock.com

Master Slave SPI communication
http://www.libstock.com/projects/view/2 ... munication


If possible always use code tags for posting your source code in forum.


Best regards,
Peter