// stop watch for NXT + BricxCC
// by takuya matsubara
#include "NXCDefs.h"

byte vram[32];

           // 01234012340123401234012340123401234012340123401234
string font0=" xxx   x   xxx  xxx    x xxxxx  xxxxxxxx xxx  xxx ";
string font1="x   x xx  x   xx   x  xx x     x       xx   xx   x";
string font2="x   x  x  x   x    x x x x    x        xx   xx   x";
string font3="x   x  x     x  xxx x  x xxxx xxxx     x xxx x   x";
string font4="x   x  x    x      xxxxxx    xx   x   x x   x xxxx";
string font5="x   x  x   x       x   x     xx   x  x  x   x   x ";
string font6="x   x  x  x    x   x   x     xx   x x   x   x  x  ";
string font7=" xxx  xxx xxxxx xxx    x xxxx  xxx x     xxx  x   ";

void put_num(char x,int num)
{
  byte tmp;
  byte cnt=5;
  int readcnt = 0;     //sensor to NXT. input bytes

  num *= 5;

  while(cnt--){
     tmp = 0;
     if(SubStr(font0,num,1) !=" ") tmp |= (0x01 << 0);
     if(SubStr(font1,num,1) !=" ") tmp |= (0x01 << 1);
     if(SubStr(font2,num,1) !=" ") tmp |= (0x01 << 2);
     if(SubStr(font3,num,1) !=" ") tmp |= (0x01 << 3);
     if(SubStr(font4,num,1) !=" ") tmp |= (0x01 << 4);
     if(SubStr(font5,num,1) !=" ") tmp |= (0x01 << 5);
     if(SubStr(font6,num,1) !=" ") tmp |= (0x01 << 6);
     if(SubStr(font7,num,1) !=" ") tmp |= (0x01 << 7);
     vram[x] = tmp;
     x++;
     num++;
  }
}

void put_vram(void)
{
   int i,j;
   
   ClearScreen();
   for(i=0;i<(100/4);i++){
      for(j=0;j<8;j++){
         if((0x80>>j)& vram[i]){
            RectOut(i*4, j*6, 3, 5);
         }
      }
   }
}

void put_time(int time)
{
     put_num( 0,(time / 1000)%10);
     put_num( 6,(time / 100)%10);
     put_num(14,(time / 10)%10);
     put_num(20,time % 10);
     put_vram();
}

void wait_button_press(void){
  while(ButtonPressed(BTNCENTER, false)==1); //until OFF
  while(ButtonPressed(BTNCENTER, false)==0); //until ON
}

task main()
{
  int time;
  long starttick;
  int btn_disable;

  TextOut(0,40,"Stop Watch");
  TextOut(0,20,"Press Center Btn.");
  wait_button_press();

  vram[12]=0x80;  //point

  while(1){
    PlayTone(200,50);

    time = 0;
    put_time(time);
    TextOut(0,LCD_LINE1,"READY...");
    wait_button_press();

    PlayTone(400,50);
    starttick = CurrentTick();

    btn_disable=1;
    while(1){
      put_time(time);

      time=(CurrentTick() - starttick)/10;
      if(time > 9999)time=9999;

      if(btn_disable){
        if(ButtonPressed(BTNCENTER, false)==0){
          btn_disable=0;
        }
      }else{
        if(ButtonPressed(BTNCENTER, false)==1){
          break;
        }
      }
    }
    put_time(time);
    PlayTone(500,50);
    TextOut(0,LCD_LINE1,"STOP");
    wait_button_press();
  }
}