File content as of revision 3:9fe0f8f806db:

#include "mbed.h"
#include "usbhid.h"

DigitalOut led(LED1);
DigitalOut nCS(p11);
DigitalOut jstkCS (p8);
SPI jstk (p5,p6,p7);
Serial pc(USBTX, USBRX);



void JSTK2_init(){
    jstk.format(8,0) ; // format 8 bits Mode0
    jstk.frequency(1000000);
    jstkCS=1;
    wait_us(25);
}
//read X axis, Y axis and button states
void JSTK2_read(int* X, int* Y, char* B) {
  unsigned char data[5];
  jstkCS=0;
  wait_us(15); // see doc: wait 15us after activation of CS line
  for (short i = 0; i < 5; i++) { // get 5 bytes of data
    data[i] = jstk.write(0);
    wait_us(10); // see doc: wait 10us after sending each data
  }
  jstkCS=1; // deactivation of CS line

  *X = (((unsigned int)data[1]) << 8) | ((unsigned int)data[0]); //recunstruct 10-bit X value
  *Y = (((unsigned int)data[3]) << 8) | ((unsigned int)data[2]); //recunstruct 10-bit Y value

  //Offset pour avoir + ou - suivant le sens du mouvement
  *X -= 512;
  *Y -= 512;

  *B = data[4]; //0:  button, 1: trigger, 2: joystick
}

USBJoystick joystick;

int xv,yv;
char bv;
int main() {
    nCS=1;
    JSTK2_init();
    while(1) {
            JSTK2_read(&xv,&yv,&bv);
    //pc.printf("%5d  %5d  %03x\r\n",xv,yv,(char*)bv);
    //JSTK2_light(xv,yv);
           
            signed char x = xv/4;
            signed char y = yv/4;
            signed char z = 0;
            signed char rz =0;
            unsigned short buttons = bv&0x03;
            led = buttons;
            joystick.joystick(0,buttons, x, y, z, rz);
            wait(0.05);
    }       
}