absfast123
New Member
I want to setup multi master mode. in which one out of both PICs can transmit data by becomming master on their own need.(as i told in start this my actual need). I made one pic as master and tramitting data to slave pic(working fine). but on Slave side when i change some code for making it slave for the time being. i mean each time initialization of slave mode and closing of SPI module in getSPIData() routine does'nt work. but when i initialize spi module before while(1) just one time and donot close spi module it works fine and continuesly get data from master. Code is given as under.
Thanks in advance,
AB Sami.
Code:
#include<spi.h>
#include <p18cxxx.h>
#include<delays.h>
typedef union {
struct {
unsigned char v1;
unsigned char v2;
};
unsigned short val;
} WORD_VAL;
WORD_VAL TotalBytes;
unsigned char strout[200];
void InitSPI(void){
OpenSPI(SLV_SSON, MODE_00, SMPMID);
TRISAbits.TRISA5 = 1; //CS
TRISCbits.TRISC4 = 1; //DI
TRISCbits.TRISC5 = 0; //DO
TRISCbits.TRISC3 = 1; //SCLK
}
void GetSPIData(void)
{
InitSPI();
if(!PORTAbits.RA5)
{
TotalBytes.v1=getcSPI();
TotalBytes.v2=getcSPI();
getsSPI(strout,200);
}
CloseSPI();
}
void main(void)
{
unsigned int i=0;
TotalBytes.val=0;
lcd_init();
calc_display(strout);
clearscreen();
while(1)
{
GetSPIData();
strout[0]='B';
if(++i>=5000){
if(TotalBytes.val==536)
{
strout[0]='A';
}
strout[1]='\0';
calc_display(strout);
i=0;
}
}
}Thanks in advance,
AB Sami.