/* SIODEMO.C */
              
/***************************************************************************
*

* ---------------------------------------------
*Main module for STK16X (ASC0, 57600 Baud, 8, 1, n) demo 
*
*
* TQ-Systems GmbH
* ----------------                                                         
* Customer: TQ-Components
* Project : STK16XSW
* Tools   : uVision 2.05
*
* Copyright (C) 1995 TQ-Systems
* -----------------------------
* Rev: Date:     Name:            Modification:
* ----+---------+----------------+------------------------------------------
* 100  27.04.01  K. Z鰌f        taken over from STK16X.506                
/*****************************************************************************/

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

/****************************************************************************
*
*
*                            availability summary
*
* available for Starterkit: STK16x STK16XU
* conformed for Starterkit: Stk16x STK16XU 
* available for Modul     : TQM167UL TQM167U  TQM167UL
*                           TQM164   TQM165  TQM167LC TQM167C
* conformed for Modul     : TQM167UL TQM167U  TQM167UL
*                           TQM164   TQM165  TQM167LC TQM167C
*****************************************************************************/

/*--------------------------------------------------------------------------*
* Standard-Include-Files: 
*---------------------------------------------------------------------------*/

#include <stdio.h>
#include <ctype.h>   /* Typecast functions        */
#include <string.h>  /* String functions          */
#include <setjmp.h>  /* Global jump functions     */

/*--------------------------------------------------------------------------*
* Hardware- and Compiler-spezifische Include-Files: 
*---------------------------------------------------------------------------*/

#include <absacc.h>  /* absolute accesss          */
#include <intrins.h> /* Intrinsic functions       */
#include <reg167.h>  /* Special function register */

/*--------------------------------------------------------------------------*
*product specific include-files: 
*---------------------------------------------------------------------------*/

#include "header.h"
#include "timer.h"


/* control character: */

#define BK    0x03
#define BS    0x08
#define CR    0x0D
#define LF    0x0A
#define XON   0x11
#define XOFF  0x13

/* baudrate definition */
#define BR9600  0
#define BR19200 1
#define BR38400 2
#define BR57600 3

/* appropriated Baudrate */
#define USED_BAUDRATE BR57600

/* control-bits serial interface: */
sbit P3_8   = P3^8;
sbit P3_10  = P3^10;
sbit DP3_8  = DP3^8;
sbit DP3_9  = DP3^9;
sbit DP3_10 = DP3^10;
sbit DP3_11 = DP3^11;

/* to initialize Asynchrone serial Interface ASC0 : */

void initasc()
{
  /* Reload-Values for 9600, 19200, 38400 und 57600 Baud: */
  const int br[4] = { 0x40, 0x20, 0x0F, 0x0A }; 
  
  int  n;   /* Number of Baudrate  */
  n = USED_BAUDRATE;
  /* to initialize data reception over interface: */
  P3_10  =1;                   /* P3.10-Output-Latch (TxD0) enable    */
  DP3_10 =1;                   /* P3.10 (TxD0) switch to output       */
  DP3_11 =0;                   /* switch RxD0 to input                */
  S0TIC  =0x80;                /* Transmit-Interrupt disable          */
  S0RIC  =0x00;                /* Receive-Interrupt disable           */
  S0BG   =br[n];               /* initialize Baudrate                 */
  S0CON  =0x8011;              /* start up Baudrate-Generator ,       */
                               /* activate receiving Data  ,           */
                               /* 8-Datenbits, no Parit鋞sbit         */
  IEN    = 1;                  /* to enable global Interrupt          */
}

/* Test to receive characters : */
/* return: Integer = >0, if receive a character  */

int keypressed()
{
 int   flag; 
 char  ch;
 /* read Data : */
 flag=S0RIR;   /* ASC0-receive-Flag  */
 ch  =S0RBUF;  /* receive character  */
 /* to ignore LF, Xon and Xoff :     */
 if (flag && (ch==LF || ch==XON || ch==XOFF)) flag=0;
 return flag;
}

/* read character : overwrite Standartfunction */
/* return: char = from ASC0 received character   */

char _getkey()
{
  char  ch;
  while(!keypressed()); /* wait of character         */
  ch=S0RBUF;            /* read received character   */
  S0RIR=0;              /* to relocate recieve-Flag  */
  return ch;
}

/* to write out character : overwrite Standardfunction, for example printf verw. */
/* committal: char = character to send                                  */
/* return: char = transmited character                                     */

char putchar (char ch)
{
  if (ch=='\n') putchar(13);  /* converting LF -> CR+LF              */
  while (!S0TIR);             /* wait until last character is transmited */
  S0TIR=0;                    /* to relocate transmit-Flag              */
  return (S0TBUF=ch);         /* write character to transmit buffer    */
}

/* receive a character:                                             */
/* return: char = received character                                   */
/*         released character: "0".."9" , "A".."Z" , " " , "," , "="   */
/*         converting  "a".."z" into "A".."Z"                          */

char sio_getchar()
{
  /* Local variables: */
  char  c;

  while (1)
  {
    c=_getkey();

    /* Testing the received character: */
    switch (c)
    {
      case BS:
      case BK:
        return c;

      case CR:
        putchar(c);
        return c;

      /* Filtering valid characters: */
      default:
        if (isalnum(c)||(c==' ')||(c==',')||(c=='='))
        {
          c=toupper(c);
          putchar(c);
          return c;
        }
    }
  }
  return 0;
}

/* wait action: time is in ms, max. 3.3 s */

void delay(unsigned int time)
{
  T0R=0;                            /* Timer 0 Stop                   */
  T0IR=0;                           /* deletes Interrupt-Request-Flag  */
  T0=-((((long)time)*5000)/256);    /* Timer-Value in 51.2 us         */
  T01CON=T01CON&0xFF00|(0x40+0x07); /* T0R=1, T0M=0, T0I=3            */
  while(!T0IR);                     /* wait of Timeout              */
}

/* arithmetic technique prime number : */

void primzahlen()
{
  unsigned long  z, t, r;
  printf("\n\nPrimzahlen: Abbruch auf Tastendruck.");
  z=1; r=1;
  while(!keypressed()) /* truncation top press any Key */
  {
    while(r*r<z) r++;
    for(t=3; t<=r; t+=2) if(z%t==0) break;
    if(t>r) printf("\n%5li", z);
    z+=2;
  }
  _getkey(); /* read character */
}

/*  rolling direction: */

void lauflicht()
{
  unsigned int  i;
  printf("\n\nLauflicht auf Port 2: Abbruch auf Tastendruck.");
  if (TQMMOD==TQM164) 
  {
    MVAR(unsigned int, 0xF106) =0xffff;  /* set Port P1H to output : */
    P1H = 0x0001;
  }
  else
  {
    DP2 = 0xFFFF;                      /* set P2 to output:      */
    P2  = 0x0101;           
  }
  /* Lauflicht: */
  i=0; 
  while(!keypressed()) /* truncation top press any Key */
  {
    i+=4;
    if(!i) 
    { 
      if (TQMMOD==TQM164) 
           {P1H<<=1; if((P1H&0x00FF)==0) P1H=0x0001; }
      else
      if (TQMMOD==TQM165) 
           {P2<<=1;  if((P2&0xFF00)==0)  P2=0x0101;  }
      else
        {P2<<=1;  if((P2&0x00FF)==0)  P2=0x0101;  }
    }
  } 
  /* set back Port P1H to input: */
  if (TQMMOD==TQM164) MVAR(unsigned int, 0xF106) =0;
  else  DP2 = 0;   /* set back P2 to input: */
}

/* mainfunktion: */

void main (void)
{
  char  ch;
  initasc();         /* initialize input- und output  */
  while(1)
  {
    printf(
      "\n\nDemonstrationsprogramm fuer TQM164/165/166/167/167LC: SIODEMO.C"\
      "\n\n<P> :Primzahlenberechnung"\
      "\n<L> :Lauflicht an Port 2"\
      "\n<R> :Reset (TRAP 0)"\
      "\n");
    do
    {
      printf("\n>");
      putchar(ch=toupper(_getkey()));
      switch(ch)
      {
        case 'P' :primzahlen(); break;
        case 'L' :lauflicht(); break;
        case 'R' :_trap_(0);
      }
    }
    while(ch>32);
  }
}