main.c

来自「8051试验程序 基础教材」· C语言 代码 · 共 237 行

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

#include "target.h"
#include "lcd.h"
#include "led.h"


/* defines */
#define TRUE      1
#define FALSE     0
#define RIDDLE    0
#define SOLUTION  1
#define NO_WORDS  4
#define MAX_CHAR 16

/* globals */

/* word will hold a copy of current riddle and solution in data memory */
struct
{
  char riddle[MAX_CHAR];
  char solution[MAX_CHAR];
} word;

/* riddles and solutions are stored in code memory */
const char __code constData[NO_WORDS][MAX_CHAR] = { "www.iar.com", "EMBEDDED", "SOLUTIONS", "MICROCONTROLLER" };

/* achieved level 1-4 */
unsigned char level  = 0;

/* solution flag */
unsigned char solved = FALSE;

/* current moving character */
unsigned char c      = '_';

/* max position for current word */
unsigned char maxPos = 0;

/* wheel (pot.) current  position */
unsigned char pos    = 0;

/* ADC snapshot value */
unsigned char value  = 0;


/**********************/
/* main program entry */
/**********************/
int main()
{
  /* target/sytem initialization */
  target_init();

  /* port initialization */
  port_init();

  /* LCD initialization */
  lcd_init();

  /* LED initialization */
  led_init();

  /* set line\row  */
  send_lcd_command( FIRST_LINE );

  /* write string to display  */
  send_lcd_text("www.iar.com");

  /* set line\row  */
  send_lcd_command( SECOND_LINE );

  /* write string to display  */
  send_lcd_text("Push button...");

  for( ;; )
  {
    /* button pushed? */
    if( !P1_bit.INT1 )
    {
      /* light display */
      lcd_light( ON );

      /* wait for button release */
      while( !P1_bit.INT1 );

      /* enable ADC for continious burst conversion */
      ADINS  |= 0x01;
      ADMODA_bit.BURST0 = 1;
      ADCON0 |= 0x05;

      /* reset level */
      level = 0;

      while( level < NO_WORDS )
      {
        /* copy riddle and solution to */
        for( int i=0; i<MAX_CHAR; ++i )
        {
          word.solution[i] = constData[level][i];

          /* clear riddle */
          word.riddle[i] = ' ';
        }

        /* max pos of current word */
        maxPos = strlen(word.solution);

        /* generate riddle == shuffle characters */
        for( int i=0; i<maxPos; ++i )
        {
          unsigned char x;

          do
          {
             do
             {
               x = rand() / 1490;
             } while( x >= maxPos );

          }while( word.riddle[x] != ' ' );

          word.riddle[x] = constData[level][i];
        }

        /* clear display */
        send_lcd_command( CLR_DISP );

        /* write string to display  */
        send_lcd_command( FIRST_LINE );
        send_lcd_text( word.riddle );

        while( !solved )
        {
          /* read pot. */
          value = AD0DAT0;

          if( (pos != (value/16)) && (pos <= maxPos) )
          {
            /* clear old marker */
            send_lcd_command( SECOND_LINE | pos );
            send_lcd_char(' ');
          }

          /* calc. new pos */
          pos = value / 16;

          if( pos >= maxPos )
          {
            pos = maxPos-1;
          }

          /* write the marker */
          send_lcd_command( SECOND_LINE | pos );
          send_lcd_char( c );

          if( !P1_bit.INT1 )
          {
            unsigned char oldC = c;

            /* swap the bytes */
            c = *(word.riddle + pos);
            *(word.riddle + pos) = oldC;

            /* update "word" on display */
            send_lcd_command( FIRST_LINE | pos );
            send_lcd_char( oldC );

            /* update the marker */
            send_lcd_command( SECOND_LINE | pos );
            send_lcd_char( c );

            solved = TRUE;

            for( int i=0; i<maxPos; ++i )
            {
              if( word.riddle[i] == word.solution[i] )
                continue;

              solved = FALSE;
            }

            /* wait for button release */
            while( !P1_bit.INT1 );
          }
        }

        for( int i=0; i<4; ++i )
        {
          /* clear display */
          send_lcd_command( CLR_DISP );

          for(int j=0; j<20000; ++j);

          /* write string to display  */
          /* set line\row  */
          send_lcd_command( FIRST_LINE );
          send_lcd_text( word.riddle );

          for(int j=0; j<20000; ++j);
        }

        /* go to next level */
        level++;

        /* lit level LED */
        led_on( level );

        /* reset flag */
        solved = FALSE;
      }

      /* */
      led_off( 1 );
      led_off( 2 );
      led_off( 3 );
      led_off( 4 );

      /* clear display */
      send_lcd_command( CLR_DISP );

      /* write string to display  */
      send_lcd_command( FIRST_LINE );
      send_lcd_text("You did it!");

      /* set line\row  */
      send_lcd_command( SECOND_LINE );

      /* write string to display  */
      send_lcd_text("Push button...");
    }
  }
}