/**********************************************

			KBD.c

**********************************************/


//---------------------------------------------
//
//	Pin-Belegung
//	RS an P2.0
//	R/W an P2.1
//	E an P2.2
//	DB=-DB7 an P1.0-P1.7
//
//---------------------------------------------


#include <msp430x44x.h>

//Prototypen

void waitKBD (unsigned int dauer);

// Deklaration der Funktionen

void waitKBD(unsigned int i)
{
  unsigned int j;
  for(j = 0; j < i ; j++);
}
  
unsigned char KeyPressed(void)
{        
  int Taste = 0;
  
  P3OUT = 0xF0;               // erste Zeile (P3.3) aktiv (low)
  waitKBD(20);
  switch (P3IN)
  {
    case 0x06: Taste = ('1');                //Zuweisung des entsprechenden ASCII-Werts
    break;
     
    case 0x05: Taste = ('2');
    break;
      	      
    case 0x03: Taste = ('3');
    break;
  }
  
  P3OUT = 0xF8;                  // erste Zeile (P3.3) inaktiv (high)
  
  if (Taste == 0)
  {
    P3OUT = 0xE8;               // zweite Zeile (P3.4) aktiv (low)
    waitKBD(20);    
    switch (P3IN)
    {
      case 0x06: Taste = ('4');                //Zuweisung des entsprechenden ASCII-Werts
      break;
     
      case 0x05: Taste = ('5');
      break;
      	      
      case 0x03: Taste = ('6');
      break;
    }  
    
  P3OUT = 0xF8;                  // zweite Zeile (P3.4) inaktiv (high)
  }
    
  if (Taste == 0)
  {
    P3OUT = 0xD8;               // dritte Zeile (P3.5) aktiv (low)
    waitKBD(20);  
    switch (P3IN)
    {
      case 0x06: Taste = ('7');                //Zuweisung des entsprechenden ASCII-Werts
      break;
     
      case 0x05: Taste = ('8');
      break;
      	      
      case 0x03: Taste = ('9');
      break;
    }  
    
  P3OUT = 0xF8;                  // dritte Zeile (P3.5) inaktiv (high)
  }
  
  if (Taste == 0)
  {
    P3OUT = 0xB8;               // vierte Zeile (P3.6) aktiv (low)
    waitKBD(20);
    switch (P3IN)
    {
      case 0x06: Taste = ('.');                //Zuweisung des entsprechenden ASCII-Werts
      break;
     
      case 0x05: Taste = ('0');
      break;
      	      
      case 0x03: Taste = ('#');
      break;
    }  
    
  P3OUT = 0xF8;                  // vierte Zeile (P3.6) inaktiv (high)
  }

  return(Taste);      		  //Rückgabe des Tastenwerts
}




/**********************************************

			MainKBD.c

**********************************************/

#include <msp430x44x.h>
#include <Kbd-Erne.h>

// Globale Variable

unsigned int i;

//main

void main (void)
{
  unsigned char Taste;

  WDTCTL = WDTPW + WDTHOLD;   // Watchdog Timer aus
  
  SCFQCTL =~ 0x80;            // DCO Modulation is enabled
    
  FLL_CTL0 = 0xA0;            // 1 - DCO output is not divided
                              // 0 - low frequenzy mode 32768 Hz crystal at XT1
                              // 10 - 8 pF internal capacitance
                              // 0000 - no fault condition present
                              
  /*FLL_CTL1 = 0x60;            // 0 - unused
                              // 1 - sub main clock is off
                              // 1 - XT2 is off (not assembled!)
                              // 00 - master clock source is DCO
                              // 0 - source for SMCLK is DCO
                              // 0 - auxiliary clock is divided by 1*/
                              
  FLL_CTL1 = 0x38;            // 0 - unused
                              // 0 - sub main clock is on
                              // 1 - XT2 is off (not assembled)
                              // 11 - master clock source is XT1 at 32,768kHz
                              // 0 - source for SMCLK is DCO
                              // 0 - auxiliary clock is divided by 1
                              
  P1SEL = 0x00;
  P2SEL = 0x00;
  P3SEL = 0x00;
  P4SEL = 0x00;
  P5SEL = 0x00;
  P6SEL = 0x00;               // alle Ports als I/O's verwenden (user's Guide page 9-6: Configuring unused Port Pins)
  
  P1DIR = 0xFF;
  P2DIR = 0xFF;
  P4DIR = 0xFF;
  P6DIR = 0xFF;               // alle Ports in Output-Richtung (user's Guide page 9-6: Configuring unused Port Pins)
  
  P3DIR |= 0xF8;              // setzte P3.0 - P3.2 als Input und P3.3 - P3.7 als output
  P3OUT = 0x78;                 // P3.3-P3.6 = '1'
  
  P5DIR |= 0x02;                // P5DIR.1 auf OUTPUT
  P5OUT =~ 0x02;                // LED aus
  
  while (1)
  {
    Taste = KeyPressed();
    
    switch (Taste)
    {
      case '1': P5OUT = 0x02;
                waitKBD(1000);
                P5OUT =~ 0x02;
      break;
      
      case '2': P5OUT = 0x02;
                waitKBD(1000);
                P5OUT =~ 0x02;
      break;
      
      case '3': P5OUT = 0x02;
                waitKBD(1000);
                P5OUT =~ 0x02;
      break;
      
      case '4': P5OUT = 0x02;
                waitKBD(1000);
                P5OUT =~ 0x02;
      break;
      
      case '5': P5OUT = 0x02;
                waitKBD(1000);
                P5OUT =~ 0x02;
      break;
      
      case '6': P5OUT = 0x02;
                waitKBD(1000);
                P5OUT =~ 0x02;
      break;
      
      case '7': P5OUT = 0x02;
                waitKBD(1000);
                P5OUT =~ 0x02;
      break;
      
      case '8': P5OUT = 0x02;
                waitKBD(1000);
                P5OUT =~ 0x02;
      break;
      
      case '9': P5OUT = 0x02;
                waitKBD(1000);
                P5OUT =~ 0x02;
      break;
      
      case '0': P5OUT = 0x02;
                waitKBD(1000);
                P5OUT =~ 0x02;
      break;
      
      case '.': P5OUT = 0x02;
                waitKBD(1000);
                P5OUT =~ 0x02;
      break;
      
      case '#': P5OUT = 0x02;
                waitKBD(1000);
                P5OUT =~ 0x02;
      break;
    }
      
  }
}