Diff: main.cpp

Revision:

0:d43885c9d5d8

Child:

1:8727231a97ab

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Jun 22 06:34:36 2016 +0000
@@ -0,0 +1,250 @@
+#include "mbed.h"
+//#include <string>
+
+DigitalOut led(p20);//P1_13);
+Serial pc(USBTX,USBRX);
+BusOut leds(LED1,LED2,LED3,LED4);
+Timer tim;
+Ticker tick;
+char strRnd[5];
+char strIn[50];
+int tries=0,cnt=0;
+
+// States
+const int ST_BOOT = 0;
+const int ST_AUTH = 1;
+const int ST_STRING = 2;
+const int ST_INPUT = 3;
+const int ST_COMP = 4;
+const int ST_SUCC = 5;
+
+void blink();
+// ---------------- Read String from Serial --------------------------
+void ReadFromSerial(char *s, const int MAX_SIZE=50)
+{
+    for (int i = 0; i < 50; i++) {s[i] = '\0';}    //set entire string to NULL
+    for (int i = 0; i < 50; i++) {
+        char c = pc.getc();
+        if (c == '\n')
+            break;
+        s[i] = c;
+    }
+}
+// ---------------- Random String Gen --------------------------
+void gen_random(char *s, const int len)
+{
+    static const char alphanum[] =
+        "0123456789"
+        "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+        "abcdefghijklmnopqrstuvwxyz";
+
+    for (int i = 0; i < len; ++i) {
+        s[i] = alphanum[rand() % (sizeof(alphanum) - 1)];
+    }
+
+    s[len] = 0;
+}
+// ---------------- Event Klasse --------------------------
+class SwEvent
+{
+    InterruptIn _isr;
+    bool _pressed;
+    void _RisingISR();
+
+public:
+    SwEvent(PinName pin) : _isr(pin) {
+        _pressed = false;
+    }
+    int CheckFlag();    // das muss im do-Zweig (while(true) Schleife) ständig abgefragt werden
+    void InitIsr();
+};
+
+int SwEvent::CheckFlag()
+{
+    if( _pressed ) {
+        _pressed = false;
+        return 1;
+    }
+    return 0;
+}
+
+void SwEvent::InitIsr()
+{
+    _isr.rise(this, &SwEvent::_RisingISR);
+}
+
+void SwEvent::_RisingISR()
+{
+    if( _isr.read() )
+        _pressed = true;
+}
+
+SwEvent sw2(P0_23);
+
+// ----------------- Stm Klasse -----------------------------
+class Stm
+{
+public:
+    Stm() {
+        state=ST_BOOT;
+    }
+
+    void Boot();
+    void Auth();
+    void GenString();
+    void Input();
+    void Comp();
+    void Succ();
+
+    uint8_t state;
+};
+
+
+void Stm::Boot()  //ST-0 -> Boot Message
+{
+    leds = 0x0;
+    pc.printf("HELLO!\n");
+    tim.start();
+    while(true) {
+        if(tim.read()>1) {
+            tim.stop();
+            tim.reset();
+            state = ST_AUTH;
+            return;
+        }
+    }
+}
+
+void Stm::Auth()  //ST-1 -> Authentication
+{
+    tick.attach(&blink,0.5);
+    tim.reset();
+    pc.printf("Bitte betaetigen Sie die Taste <SW2> um fortzufahren\n");
+    while(true) {
+        led=1;
+        if(sw2.CheckFlag()) {
+            tick.detach();
+            state = ST_STRING;
+            return;
+        }
+    }
+}
+
+void Stm::GenString()  //ST-2 -> Generate Random String
+{
+    gen_random(strRnd, 5);
+    pc.printf("%s\n",strRnd);
+    tim.start();
+    leds=0x9;
+    tick.attach(&blink,0.2);
+    while(1) {
+        state = ST_INPUT;
+        return;
+    }
+}
+
+
+void Stm::Input()  //ST-3 -> Input from Serial
+{
+    pc.printf("String eingeben!\n");
+    while(1) {
+        strIn[0]='\0';
+        //pc.scanf("%s", strIn);
+        ReadFromSerial(strIn);
+        pc.printf("%s\n",strIn);
+        tick.detach();leds = 0x0;
+        state = ST_COMP;
+        return;
+    }
+}
+
+
+void Stm::Comp()  //ST-4 -> Compare the Strings
+{
+    if (strncmp(strRnd,strIn,5)==0) { //Strings sind gleich
+        tim.stop();
+        leds=0xF;
+        tries = 0;
+        pc.printf("Erfolgreiche Eingabe in %.2f Sekunden\n",tim.read());
+        while(1) {
+            state = ST_SUCC;
+            return;
+        }
+    } else if (strncmp(strRnd,strIn,5)!=0 && tries == 2) { //3x falsch
+        tim.reset();
+        tries +=1;
+        pc.printf("3-fach Falsche Eingabe\n");
+        leds=0xF;
+        while(1) {
+            if (tim.read_ms()>200) {
+                leds = ~leds;
+                tim.reset();
+            }
+        }
+    } else { //falsch
+        pc.printf("Falsche Eingabe\n");
+        tries +=1;
+        leds=0x2;
+        state=ST_INPUT;
+    }
+}
+void Stm::Succ()  //ST-5 -> Successful Input
+{
+    while(1) {
+        ReadFromSerial(strIn);
+        if (strIn[0] == '.') {
+            leds = 0x0;
+            state = ST_AUTH;
+            return;
+        }
+        if (strIn[0] != '\0') {
+            cnt++;
+            pc.printf("%i:%i> %s\n",cnt,strlen(strIn),strIn);
+        }
+    }
+}
+
+
+Stm stm;
+
+void stateMachine()
+{
+    switch (stm.state) {
+        case ST_BOOT:
+            stm.Boot();
+            break;
+        case ST_AUTH:
+            stm.Auth();
+            break;
+        case ST_STRING:
+            stm.GenString();
+            break;
+        case ST_INPUT:
+            stm.Input();
+            break;
+        case ST_COMP:
+            stm.Comp();
+            break;
+        case ST_SUCC:
+            stm.Succ();
+            break;
+        default:
+            stm.Boot();
+            break;
+    }
+}
+
+void blink(){
+    if (stm.state == ST_AUTH){
+        leds[0] = !leds[0];}
+    if (stm.state == ST_INPUT){
+        leds = ~leds;}
+}
+
+int main()
+{
+    sw2.InitIsr();
+    while(1) {
+        stateMachine();
+    }
+}