File content as of revision 1:2aadc0008662:

#include "mbed.h"

DigitalIn spiin(p5);
//SPISlave slave(PTA7,PTA6,PTB0,PTA5);
SPISlave slave(p5,p6,p7,p8);
AnalogIn ain1(p20);
//SPISlave slave(p11,p12,p13,p14);

Serial pc(USBTX, USBRX);
#define VER "1.35"

int main() {
    spiin.mode(PullUp);
    slave.format(8,0);
    slave.frequency(1000000);
    int v, res,res2;
    int cnt=0;
    int slvrecnt=0;

    pc.printf(" start spi slave test %s   \n\r",VER );     
    slave.reply(0);    // is in the example ? 
    float  sample=0;
    int slavereply;
    while(1) {
        cnt++;
        //if( (cnt % 10000000) ==0)   pc.printf("%s loop : cnt %d , slvrsv cnt %d\n\r",VER,cnt, slvrecnt);
        sample=200*ain1.read();
        if(slave.receive()) {       
            v = slave.read();   // Read byte from master
            if(v!=0){// discard the dummy buffer write
                //res=(v+5);     // Add 5 to it
                res=slvrecnt%256;
               // res=0x13;
                slavereply=(int)sample;
                slave.reply(slavereply);// Make this the next reply
                
               //pc.printf("v=%x res= %x\n\r", v,slavereply);
                slvrecnt++;
            }
            else {
                res2=cnt%256;    
                slave.reply(res2);         // Make this the next reply
                slvrecnt=0;
                //pc.printf("v=%d   res2 = %x\n\r", v , res2);
            }
            //pc.printf( "slave receive done  \n\r");
            //}
        }
    } 


}