1. include "mbed.h"

Serial pc(USBTX, USBRX); tx, rx

unsigned int newEvent =0; unsigned int event=0, state=0;

char OP;

int noFunction(); int getOperator(); int printOutput(); uint8_t debounce(DigitalIn myIn);

uint8_t nextstate_tab[2][2]= current event/ present state 0 1 ---- /* Event 0 (Joystick UP) */{{ 1, 1 }, /* Event 1 (Eingabe ) */ { 0, 0 }};

int (*action[2][2])()= 0 1 /* event 0 */ {{ getOperator, noFunction }, /* event 1 */ { noFunction, printOutput }};

int noFunction() { return 0; }

int getOperator() {

int RandomNumber1; int RandomNumber2; OP = pc.getc();

RandomNumber1 = rand() % 100 + 1; RandomNumber2 = rand() % 19 + (-9);

/* switch(OP) { case '+' : RandomNumber = rand() % 100 + 1; break; case '-' : RandomNumber2 = rand() % 100 + 1; break; }

• /

pc.printf("BLABLABLA");

return 0; }

int printOutput(){ return 0; }

void init() { newEvent = false; state=0; event=0; }

unsigned char debounce(PinName name, unsigned char samples) { DigitalIn joystick(name); unsigned char i = 0;

for(unsigned char j=0; j < samples; j++) { if(joystick == 1) j++; else { j = 0; i++; }

if(j >= samples) break; if(i >= samples) break;

wait(0.001); } return joystick; }

int main() {

unsigned char released = 0; init();

pc.printf("Random Calculator mit der Taste JoyStick UP starten: Mark Ilgerl");

while(1) { if(debounce(p15, 6)) { if (released == 1) { event = 0; newEvent =1; released =0; } } else { released =1; }

if (newEvent==1) { newEvent =0; (*action[event][state])(); state=nextstate_tab[event][state]; }

}

}