File content as of revision 3:487c2fdc28f0:

// Payload uC (Tiva) -- > SPI master
// CDMS uC (Freescale) --> SPI slave
// packet length = 32*16 bits (32 bins --> each 2 bytes)

#include "pin_config.h"
#include "mbed.h"
//int f;
void FUNC_MASTER_WRITE(void);
const int addr = 0x20<<1;
const int addr1 = (0x20<<1|0);
Timer t;
I2C master (PIN32,PIN31);
InterruptIn PYLD_I2C_Int(PIN100);
//DigitalIn test(PTA13);
SPISlave device(PIN16, PIN17, PIN15, PIN14 ); // mosi, miso, sclk, ssel --> using SPI1
InterruptIn PYLD_SPI_Interrupt(PIN89);
DigitalOut flash(LED4);
int payloadBins = 3096;
float Stability_delay = 0.005228 ;// 0.005228

Serial pc(USBTX, USBRX); // tx, rx  --> serial feedback for debug

void payloadProcess() {
  
   
    //wait(Stability_delay); // wait after interrupt for stability
    unsigned short scienceRawPacket[payloadBins];
    t.start();
    for(int i=0; i<payloadBins;i++){
       
        
        
        while(!device.receive()); // blocking statement --> waiting for data from Payload
        scienceRawPacket[i] = device.read();   // Read byte from master

    }
    t.stop();
    // serial feedback
    pc.printf("Packet recieved\r\n");
    for(int i=0;i<payloadBins;i++){
        pc.printf("%d\t",scienceRawPacket[i]);
        scienceRawPacket[i] = 0;
    }
    pc.printf("\n time taken = %f\r\n",t.read());
 t.reset();
} 
int dt3;
bool f = 1;
char rdata[30],rdata2;
void readds()
{   

               //wait(Stability_delay);
    flash = !flash;
    

     
             //while(!f)
             //{    
               f=  master.read(addr1,rdata,26);
             //}
    /*
        for(int i = 0;i<10;i++)
    {
     master.start();
     master.write(addr1);
     rdata[i] = master.read(1);
     master.stop();
     }
    
               master.read(addr1,&rdata[0],1);
               master.read(addr1,&rdata[1],1);
               master.read(addr1,&rdata[2],1);
               master.read(addr1,&rdata[3],1);
               master.read(addr1,&rdata[4],1);
               master.read(addr1,&rdata[5],1);
               master.read(addr1,&rdata[6],1);
               master.read(addr1,&rdata[7],1);
               master.read(addr1,&rdata[8],1);
               master.read(addr1,&rdata[9],1);
               master.read(addr1,&rdata[10],1);
               master.read(addr1,&rdata[11],1);
               master.read(addr1,&rdata[12],1);
      */       
              // dt3 = master.read(1);
               
               
}   
 
int loop=1;
char *writedata = new char;
char data = 1,data1 = 2, data2 = 3,  test[136] ; 

 
void FUNC_MASTER_WRITE(void)
{  

for (dt3 = 0;dt3 <11 ; dt3++)
{
test [dt3] = 1 ;
} 
  int data5 = pc.getc();      
      loop=1;
 
 
 master.frequency(100000); 
  *writedata = data1; 
     while(loop)
     {
         
         bool check = (bool)master.write(addr,test,135);
         
         //wait_us(10);
         
         //check = (bool)master.write(addr,&data1,1);
        // check = (bool)master.write(addr,&data1,1);
         //check = (bool)master.write(addr,&data2,1);
         //bool check = master.write(addr,test,3);
         
        // while(!test);
         
        // readds();
         
        //master.start();
        //bool check1 = master.write(addr1);
       // wait_us(10);
       // bool check2 = master.write(3);
        //wait_us(10);
        // check2 = master.write(1);
        // master.write(97);
         //master.write(107);
         //master.write(116);
         //master.write(104);
         //master.write(105);
         //wait_us(10);
         //master.write(32);
         //master.write(80);
         //master.write(114);
         //master.write(105);
         //master.write(121);
         //master.write(97);
         
        // master.stop();
         
         

         loop = 0;
     }
}  

int main() {
    int dt1 = 0,dt2 = 0 ,P= 0;
    device.format(16,0);  // SPI format --> 16 bits, mode = 0
    device.frequency(1000000);
   // master.frequency(400000);
       
    pc.printf("Example code demonstarting Payload - CDMS SPI & I2C communication!\r\n");
    PYLD_SPI_Interrupt.rise(&payloadProcess);
    PYLD_I2C_Int.rise(&readds);
    
    while(1)
    {
    FUNC_MASTER_WRITE();
    wait(1);
    //dt1 = rdata[0] ;
    //dt2 = rdata[1] ;
    for(P = 0 ; P < 26 ; P++ )
    {
    pc.printf("Temperature %d \n\r",rdata[P]);
    }
   // pc.printf("Temperature %d \n\r",dt1);
   // pc.printf("Temperature2 %d \n\r",dt2);
    //pc.printf("Temperature3 %d \n\r",dt3);
    

    }
}