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easter.c
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easter.c
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/*
* Happy easter for Uzebox
* Version 1.0
* Copyright (C) 2012 Hartmut Wendt
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdbool.h>
#include <string.h>
#include <avr/io.h>
#include <stdlib.h>
#include <avr/pgmspace.h>
#include "kernel/uzebox.h"
#include "data/happy_easter_Tiles.pic.inc"
#include "data/fonts.pic.inc"
#include "data/TitleTiles.pic.inc"
#include "data/happy_easter_sprites.pic.inc"
#include "data/patches.inc"
#include "data/Happy_Easter_tracks.inc"
#define _FadingX
/* global definitons */
// program modes
enum {
PM_Intro, // program mode intro
PM_Gameplay, // program mode game play
PM_Credits, // credits screen
PM_Help, // help screen
PM_HoF_view, // show hall of fame
PM_HoF_edit // edit name in hall of fame
};
// egg types
enum {
empty_egg,
yellow_egg,
green_egg,
grenade,
carrot,
};
/* animations */
#define chicken_max_animation 18
const char *ani_chicken[] = {
Chicken_2,
Chicken_3,
Chicken_4,
Chicken_5,
Chicken_5,
Chicken_5,
Chicken_4,
Chicken_4,
Chicken_4,
Chicken_5,
Chicken_5,
Chicken_5,
Chicken_4,
Chicken_4,
Chicken_7,
Chicken_6,
Chicken_6,
Chicken_1
};
#define bunny_max_animation 8
const char *ani_bunny[] = {
Bunny_1,
Bunny_2,
Bunny_3,
Bunny_4,
Bunny_5,
Bunny_6,
Bunny_7,
Bunny_8
};
const char *ani_yellow_egg[] = {
Yellow_egg1,
Yellow_egg2,
Yellow_egg3
};
const char *ani_green_egg[] = {
Green_egg1,
Green_egg2,
Green_egg3
};
const char *ani_grenade[] = {
Grenade1,
Grenade2,
Grenade3
};
const char *ani_carrot[] = {
Carrot1,
Carrot2,
Carrot3
};
#define bunny_speed 3; // increment of bunny x position
const u16 Max_egg_timer=400; // time between 2 falling eggs at game start
const u16 Min_egg_timer=200; // smallest time between 2 falling eggs
const u8 Max_Confusion_Time = 100; // time for bunny confusion after putting a green egg
// 8-bit, 255 period LFSR (for generating pseudo-random numbers)
#define PRNG_NEXT() (prng = ((u8)((prng>>1) | ((prng^(prng>>2)^(prng>>3)^(prng>>4))<<7))))
#define MAX(x,y) ((x)>(y) ? (x) : (y))
struct EepromBlockStruct ebs;
struct egg {
u8 PosY;
u8 SpriteType;
bool Enabled;
};
struct egg default_egg = {0,empty_egg,false};
u8 prng; // Pseudo-random number generator
u8 program_mode; // program mode (intro, 1 player mode, 2 player mode, ....
u8 ani_count_bunny=8; // counter for animation of bunny
u8 ani_count_chicken[5]; // counter for animation of chicken
struct egg eggs[5];
u8 X_pos_bunny;
u16 iEgg_Timer;
u16 iNew_Egg_Timer;
u8 bunny_sprite_direction=0;// bunny moving in left (reverse) direction
bool BMusic_on = true;
u16 iHighscore;
u8 broken_eggs;
u8 Controller_status2;
u8 autorepeat_cnt;
u8 Confusion_Timer;
u8 PosY;
u8 PosX;
/*** function prototypes *****************************************************************/
void init(void);
void set_PM_mode(u8 mode);
void msg_window(u8 x1, u8 y1, u8 x2, u8 y2);
u8 set_def_EEPROM(void);
void load_def_EEPROM(void);
void save_def_EEPROM(void);
void animate_bunny(void);
void animate_chicken(u8 chicken, u8 *ani_step);
void animate_egg(u8 egg);
u8 GetTile(u8 x, u8 y);
void copy_buf(unsigned char *BUFA, unsigned char *BUFB, unsigned char ucANZ);
void fill_buf(u8 *BUFA, u8 content, u8 ucANZ);
void Draw_egg_reserve(u8 eggs);
void clear_egg(u8 egg);
bool collect_eggs(u8 egg);
void new_egg(void);
void game_over(void);
int get_highscore(u8 entry);
u8 check_highscore(void);
void copy_highsore(u8 entry_from, u8 entry_to);
void clear_highsore(u8 entry);
u8 set_def_highscore(void);
u8 view_highscore_entry(u8 x, u8 y, u8 entry, u8 load_data);
void edit_highscore_entry(u8 entry, u8 cursor_pos, u8 b_mode);
void show_highscore_char(u8 entry, u8 position, u8 cursor_on);
void init(void)
// init program
{
// init tile table
SetTileTable(BGTiles);
// init font table
SetFontTilesIndex(BGTILES_SIZE);
// init Sprites
SetSpritesTileTable(spriteTiles);
// init music
InitMusicPlayer(patches);
// load into screen
set_PM_mode(PM_Intro);
// init random generator
Controller_status2 = DetectControllers() & 0x0C;
//Use block 24
ebs.id = 24;
if (!isEepromFormatted())
return;
if (EEPROM_ERROR_BLOCK_NOT_FOUND == EepromReadBlock(24,&ebs))
{
set_def_highscore();
}
}
int main(){
int ibuttons=0,ibuttons_old;
u8 uc1, uc2=0;
// init program
init();
// proceed game
while(1)
{
WaitVsync(3);
// get controller state
ibuttons_old = ibuttons;
ibuttons = ReadJoypad(0);
switch(program_mode)
{
// proceed intro mode
case PM_Intro:
if ((BTN_A & ibuttons) && !(ibuttons_old & BTN_A)) {
// wait for release of button A
while (BTN_A & ReadJoypad(0)) {
prng++;
WaitVsync(1);
}
prng = MAX(prng,1);
if (PosY == 0) set_PM_mode(PM_Gameplay);
else if (PosY == 1) set_PM_mode(PM_Help);
else if (PosY == 4) set_PM_mode(PM_Credits);
else if (PosY == 3) {
iHighscore = 0;
set_PM_mode(PM_HoF_view);
} else {
if (BMusic_on) {
BMusic_on = false;
DrawMap2(13,16,Music_Off_map);
StopSong();
} else {
BMusic_on = true;
Fill(18,16,3,1,0);
DrawMap2(13,16,Music_On_map);
ResumeSong();
}
}
}
// UP button
if ((ibuttons & BTN_UP) && !(ibuttons_old & BTN_UP)) {
// wait for release of button BTN_UP
while (BTN_UP & ReadJoypad(0));
Fill(11,10 + (PosY * 3),1,2,0);
if (PosY) PosY--;
DrawMap2(11,10 + (PosY * 3),Cursor_egg);
// DOWN button
} else if ((ibuttons & BTN_DOWN) && !(ibuttons_old & BTN_DOWN)) {
// wait for release of button BTN_DOWN
while (BTN_DOWN & ReadJoypad(0));
Fill(11,10 + (PosY * 3),1,2,0);
if (PosY<4) PosY++;
DrawMap2(11,10 + (PosY * 3),Cursor_egg);
}
break;
// proceed game_play
case PM_Gameplay:
// bunny animation and moving
// move the bunny left
if (((ibuttons & BTN_LEFT) && !Confusion_Timer) || ((ibuttons & BTN_RIGHT) && Confusion_Timer)) {
if (X_pos_bunny > 10) {
X_pos_bunny -= bunny_speed;
bunny_sprite_direction = SPRITE_FLIP_X;
// restart animation
if (ani_count_bunny == bunny_max_animation) ani_count_bunny = 0;
}
// move the bunny left
} else if (((ibuttons & BTN_RIGHT) && !Confusion_Timer) || ((ibuttons & BTN_LEFT) && Confusion_Timer)) {
if (X_pos_bunny < 190) {
X_pos_bunny += bunny_speed;
bunny_sprite_direction = 0;
// restart animation
if (ani_count_bunny == bunny_max_animation) ani_count_bunny = 0;
}
}
// animate the easter bunny
animate_bunny();
// bunny confusion after catching a rotten green egg
if(Confusion_Timer) {
Confusion_Timer--;
// beep if confusion times end
if (!Confusion_Timer) TriggerFx(4, 0x7f, true);
}
// generate random new eggs
if (iNew_Egg_Timer) iNew_Egg_Timer--;
else {
new_egg();
iNew_Egg_Timer = iEgg_Timer / 10;
if (iEgg_Timer > Min_egg_timer) iEgg_Timer -= 2;
}
// animate chicken
for(uc1=0; uc1 < 5; uc1++) animate_chicken(uc1,&ani_count_chicken[uc1]);
// animate eggs
for(uc1=0; uc1 < 5; uc1++) animate_egg(uc1);
// collision detection
for(uc1=0; uc1 < 5; uc1++) collect_eggs(uc1);
if (program_mode != PM_Gameplay) break;
// Draw highscore
PrintInt(5,2,iHighscore,true);
// Draw egg reserve in upper right corner
if (broken_eggs) Draw_egg_reserve(broken_eggs - 1);
else game_over();
break;
// proceed credits & help screen...
case PM_Credits:
case PM_Help:
case PM_HoF_view:
if (((BTN_A & ibuttons) && !(ibuttons_old & BTN_A)) ||
((BTN_B & ibuttons) && !(ibuttons_old & BTN_B)) ||
((BTN_X & ibuttons) && !(ibuttons_old & BTN_Y)) ||
((BTN_Y & ibuttons) && !(ibuttons_old & BTN_Y)) ||
((BTN_START & ibuttons) && !(ibuttons_old & BTN_START)) ||
((BTN_SELECT & ibuttons) && !(ibuttons_old & BTN_SELECT))) set_PM_mode(PM_Intro);
break;
case PM_HoF_edit:
// cursor blinking
uc1++;
if (uc1 >= 10) uc1 = 0;
// proceed cursor position with left & right button
if ((ibuttons & BTN_RIGHT) && !(ibuttons_old & BTN_RIGHT)) {
if (PosX < 7) {
show_highscore_char(PosY - 1, PosX, 0);
PosX++;
}
}
if ((ibuttons & BTN_LEFT) && !(ibuttons_old & BTN_LEFT)) {
if (PosX) {
show_highscore_char(PosY - 1, PosX, 0);
PosX--;
}
}
// chose character up & down button
if ((ibuttons & BTN_UP) && !(ibuttons_old & BTN_UP)) {
edit_highscore_entry(PosY,PosX,BTN_UP);
}
else if ((ibuttons & BTN_DOWN) && !(ibuttons_old & BTN_DOWN)) {
edit_highscore_entry(PosY,PosX,BTN_DOWN);
}
// show cursor
show_highscore_char(PosY - 1, PosX, uc1 > 4);
// store new entry
if (ibuttons & BTN_A)
{
// store new highscore
EepromWriteBlock(&ebs);
set_PM_mode(PM_Intro);
}
break;
}
}
}
void set_PM_mode(u8 mode) {
// set parameters, tiles, background etc for choosed program mode
u8 uc1, uc2;
#ifdef _FadingX
FadeOut(1, true);
#endif
switch (mode)
{
case PM_Intro:
SetSpriteVisibility(false);
StopSong();
// init tile table
SetTileTable(TitleTiles);
// cursor is invisible now
StopSong();
ClearVram();
// fill background with pattern
for(uc1 = 0; uc1 < 15; uc1++)
for(uc2 = 0; uc2 < 14; uc2++)
DrawMap2(uc1 * 2,uc2 * 2,Pattern_map);
// draw filled rectangles for title and menu
Fill(4,2,22,6,0);
Fill(8,9,14,16,0);
// draw game title in the top off the screen
DrawMap2(5,3,Title);
// draw the menu
DrawMap2(13,10,Start_map);
DrawMap2(13,13,Help_map);
if (BMusic_on) DrawMap2(13,16,Music_On_map);
else DrawMap2(13,16,Music_Off_map);
DrawMap2(13,19,Highscore_map);
DrawMap2(13,22,Credits_map);
// draw the cursor egg
DrawMap2(11,10,Cursor_egg);
// init variables
PosY = 0;
iHighscore = 0;
if (BMusic_on) {
//start sound track
SetMasterVolume(130);
WaitVsync(10);
StartSong(Eastern_intro_song);
}
break;
case PM_Help:
// init tile table
SetTileTable(BGTiles);
// fill background with pattern
for(uc1 = 0; uc1 < 15; uc1++)
for(uc2 = 0; uc2 < 14; uc2++)
DrawMap2(uc1 * 2,uc2 * 2,Pattern);
// draw filled rectangle for text areas
Fill(2,2,26,24,0);
// help text
Print(3,3,PSTR("GET AS MANY EGGS IN YOUR"));
Print(3,4,PSTR("EGG-BASKET AS YOU CAN!"));
DrawMap2(2,7,Yellow_egg1);
Fill(2,9,2,1,0);
Print(5,7,PSTR("FREE CHICKEN FROM EGGS"));
Print(5,8,PSTR("EARN 10 POINTS PER EGG"));
DrawMap2(2,11,Green_egg1);
Fill(2,13,2,1,0);
Print(5,11,PSTR("DON'T CATCH THE ROTTEN"));
Print(5,12,PSTR("EGG OR ITS ODOR WILL"));
Print(5,13,PSTR("STUN YOU! (-20 POINTS)"));
DrawMap2(2,16,Grenade1);
Fill(2,18,2,1,0);
Print(5,16,PSTR("NEVER ALLOW A GRENADE"));
Print(5,17,PSTR("TO FALL ON THE GROUND"));
Print(5,18,PSTR("... YOU CAN GUESS WHY"));
DrawMap2(2,21,Carrot1);
Fill(2,23,2,1,0);
Print(5,21,PSTR("WILL DECREASE THE"));
Print(5,22,PSTR("AMOUNT OFF BROKEN EGGS"));
Print(5,23,PSTR("EARN 100 POINTS"));
break;
case PM_Credits:
// init tile table
SetTileTable(BGTiles);
// fill background with pattern
for(uc1 = 0; uc1 < 15; uc1++)
for(uc2 = 0; uc2 < 14; uc2++)
DrawMap2(uc1 * 2,uc2 * 2,Pattern);
// draw filled rectangle for text areas
Fill(4,4,22,20,0);
Print(9,6,PSTR("VERSION 1.0"));
Print(5,9,PSTR("` HARTMUT WENDT 2012"));
Print(5,11,PSTR("WWW.HWHARDSOFT.DE.VU"));
Print(8,13,PSTR("SOUNDTRACK BY"));
Print(8,14,PSTR("CARSTEN KUNZ"));
Print(8,17,PSTR("LICENSED UNDER"));
Print(10,18,PSTR("GNU GPL V3"));
Print(8,21,PSTR("PRESS ANY KEY"));
break;
case PM_HoF_view:
// show the hall of fame
SetSpriteVisibility(false);
// init tile table
SetTileTable(BGTiles);
PosY = check_highscore();
if (PosY == 2) copy_highsore(1,2);
if (PosY == 1) {
copy_highsore(1,2);
copy_highsore(0,1);
}
clear_highsore(PosY - 1);
// reset cursor to left position
PosX = 0;
// fill background with pattern
for(uc1 = 0; uc1 < 15; uc1++)
for(uc2 = 0; uc2 < 14; uc2++)
DrawMap2(uc1 * 2,uc2 * 2,Pattern);
// draw filled rectangle for text areas
Fill(7,7,16,14,0);
// Print text and winners
Print(9,8,PSTR("HALL OF FAME"));
view_highscore_entry(8,12,1,!(PosY));
view_highscore_entry(8,14,2,!(PosY));
view_highscore_entry(8,16,3,!(PosY));
if (PosY) {
mode = PM_HoF_edit;
Fill(7,2,16,4,0);
Print(8,3,PSTR("CONGRATULATION"));
Print(8,4,PSTR("NEW HIGHSCORE!"));
}
Print(8,19,PSTR("PRESS BUTTON A"));
break;
case PM_Gameplay:
StopSong();
// init tile table
SetTileTable(BGTiles);
// blank screen - no music
StopSong();
ClearVram();
WaitVsync(2);
// Draw background
Fill(0,0,30,27,1);
// Draw bottom
for(uc1 = 0; uc1 < 29; uc1= uc1+2) DrawMap2(uc1,27,base);
// Draw bar
Fill(0,5,30,1,0x46);
// Draw chicken
for(uc1 = 0; uc1 < 5; uc1++) DrawMap2((uc1 * 3) + 7,0,Chicken_1);
// init variables
fill_buf(ani_count_chicken,chicken_max_animation,5);
eggs[0] = default_egg;
eggs[1] = default_egg;
eggs[2] = default_egg;
eggs[3] = default_egg;
eggs[4] = default_egg;
iHighscore = 0;
broken_eggs = 4;
X_pos_bunny = 110;
iEgg_Timer = Max_egg_timer;
iNew_Egg_Timer = Max_egg_timer / 10;
SetSpriteVisibility(true);
if (BMusic_on) {
//start sound track
SetMasterVolume(130);
WaitVsync(10);
StartSong(Eastern_game_song);
}
break;
}
#ifdef _FadingX
FadeIn(1, true);
#endif
program_mode = mode;
}
u8 GetTile(u8 x, u8 y)
// get background tile from vram
{
return (vram[(y * 30) + x] - RAM_TILES_COUNT);
}
void Draw_egg_reserve(u8 eggs)
// draw reserve of eggs
{
for(u8 uc1=0; uc1 < 3; uc1++) {
// draw entire egg
if (uc1 < eggs) DrawMap2(27 - (uc1 * 2),1,Entire_egg);
// draw broken egg
else DrawMap2(27 - (uc1 * 2),1,Broken_egg);
}
}
bool collect_eggs(u8 egg) {
// collect an egg or other object
if (eggs[egg].Enabled == false) return(false);
// check vertical position
if (eggs[egg].PosY < 27) return(false);
// check horizontal position
int XDiff = X_pos_bunny + 12 - (((egg * 3) + 8) * 8);
if ((XDiff < -8) || (XDiff > 8)) return(false);
switch(eggs[egg].SpriteType) {
case yellow_egg:
iHighscore += 10;
TriggerFx(5, 0x7f, true);
break;
case green_egg:
TriggerFx(7, 0x7f, true);
if (iHighscore > 20) iHighscore-= 20;
else iHighscore = 0;
// confusion of easter bunny
Confusion_Timer = Max_Confusion_Time;
break;
case grenade:
TriggerFx(10, 0x7f, true);
break;
case carrot:
TriggerFx(9, 0x7f, true);
iHighscore += 100;
if (broken_eggs < 4) broken_eggs++;
break;
}
clear_egg(egg);
return(true);
}
void new_egg(void) {
// start a new egg run
u8 u1,u2;
// get random slot and object
do
{
u2 = PRNG_NEXT() % 100;
u1 = u2 / 20;
} while ((eggs[u1].Enabled) || (chicken_max_animation != ani_count_chicken[u1]));
u2 = u2 % 20;
if (u2 == 1) eggs[u1].SpriteType = carrot;
else if ((u2 == 19) || (u2 == 2) || (u2 == 7)) eggs[u1].SpriteType = green_egg;
else if (u2 == 5) eggs[u1].SpriteType = grenade;
else eggs[u1].SpriteType = yellow_egg;
eggs[u1].PosY = 0;
ani_count_chicken[u1] = 0;
}
void game_over(void) {
// show game over message
Fill(11,12,8,4,0);
Print(13,13,PSTR("GAME"));
Print(13,14,PSTR("OVER"));
// stop all animations
fill_buf(ani_count_chicken,chicken_max_animation,5);
eggs[0] = default_egg;
eggs[1] = default_egg;
eggs[2] = default_egg;
eggs[3] = default_egg;
eggs[4] = default_egg;
// play gameover sound
TriggerFx(8, 0x7f, true);
WaitVsync(120);
if (0 == check_highscore()) set_PM_mode(PM_Intro);
else set_PM_mode(PM_HoF_view);
}
/**** A N I M A T I O N S ***************************************************************/
void animate_bunny(void) {
// animate the bunny
// increment the bunny animation picture
if (ani_count_bunny < bunny_max_animation) ani_count_bunny++;
MapSprite2(0,ani_bunny[ani_count_bunny - 1],bunny_sprite_direction);
MoveSprite(0,X_pos_bunny,179,3,5);
}
void animate_chicken(u8 chicken, u8 *ani_step) {
// animate a chicken
// increment the chicken animation picture
if (*ani_step < chicken_max_animation) {
DrawMap2((chicken * 3) + 7,0,ani_chicken[(*ani_step)++]);
}
// start egg animation
if (*ani_step == (chicken_max_animation - 2))eggs[chicken].Enabled =true;
}
void animate_egg(u8 egg) {
// animate egg
u8 uc1 =0;
if (eggs[egg].Enabled == false) return;
// increment the egg position
eggs[egg].PosY++;
// falling object
if (eggs[egg].PosY <= 29) {
u8 egg_tile_pos = eggs[egg].PosY / 3;
u8 egg_map = eggs[egg].PosY % 3;
// choose and draw the object
switch(eggs[egg].SpriteType) {
case yellow_egg:
DrawMap2((egg * 3) + 7,(egg_tile_pos * 2) + 6,ani_yellow_egg[egg_map]);
break;
case green_egg:
DrawMap2((egg * 3) + 7,(egg_tile_pos * 2) + 6,ani_green_egg[egg_map]);
break;
case grenade:
DrawMap2((egg * 3) + 7,(egg_tile_pos * 2) + 6,ani_grenade[egg_map]);
break;
case carrot:
DrawMap2((egg * 3) + 7,(egg_tile_pos * 2) + 6,ani_carrot[egg_map]);
break;
}
if (egg_map == 0) {
uc1 = (egg_tile_pos * 2) + 5;
SetTile((egg * 3) + 7,uc1,1);
SetTile((egg * 3) + 8,uc1,1);
}
// touch down
} else if (eggs[egg].PosY == 30) {
switch(eggs[egg].SpriteType) {
case yellow_egg:
TriggerFx(6, 0x7f, true);
if (broken_eggs) broken_eggs--;
case green_egg:
DrawMap2((egg * 3) + 7,25,Fried_egg);
break;
case grenade:
clear_egg(egg);
game_over();
break;
case carrot:
clear_egg(egg);
break;
}
} else if (eggs[egg].PosY >= 35) clear_egg(egg);
}
void clear_egg(u8 egg) {
// clear egg
// fill with background
Fill((egg * 3) + 7,22,3,5,1);
// restore bottom
u8 egg_posx = egg * 3;
if (egg_posx % 2) {
DrawMap2(egg_posx + 7,27,base);
DrawMap2(egg_posx + 9,27,base);
} else {
DrawMap2(egg_posx + 6,27,base);
DrawMap2(egg_posx + 8,27,base);
}
// reset variables
eggs[egg] = default_egg;
}
/**** S T U F F ********************************************************************/
void msg_window(u8 x1, u8 y1, u8 x2, u8 y2) {
// draw a window with frame and black backgound on the screen
// window backgound
Fill(x1 + 1, y1 + 1, x2 - x1 - 1, y2 - y1 - 1,401);
// upper frame
Fill(x1 + 1, y1, x2 - x1 - 1, 1,411);
// lower frame
Fill(x1 + 1, y2, x2 - x1 - 1, 1,410);
// left frame
Fill(x1 , y1 + 1, 1, y2 - y1 - 1,409);
// right frame
Fill(x2, y1 + 1, 1 , y2 - y1 - 1,409);
// upper, left corner
SetTile(x1,y1,405);
// upper, right corner
SetTile(x2,y1,406);
// lower, left corner
SetTile(x1,y2,407);
// lower, right corner
SetTile(x2,y2,408);
}
/**
copy a buffer into another buffer
@param source buffer
@param target buffer
@param count of copied bytes
@return none
*/
void copy_buf(unsigned char *BUFA, unsigned char *BUFB, unsigned char ucANZ)
{
for(;ucANZ>0 ; ucANZ--)
{
*(BUFB++) = *(BUFA++);
}
}
/**
fill a buffer
@param target buffer
@param byte to fill
@param count of copied bytes
@return none
*/
void fill_buf(u8 *BUFA, u8 content, u8 ucANZ)
{
for(;ucANZ>0 ; ucANZ--)
{
*(BUFA++) = content;
}
}
int get_highscore(u8 entry) {
// get the actual highscore from eeprom
// check the value for entry
if (entry > 2) return(0);
// read the eeprom block
if (!isEepromFormatted() || EepromReadBlock(24, &ebs))
return(0);
return((ebs.data[(entry * 10)+8] * 256) + ebs.data[(entry * 10)+9]);
}
u8 check_highscore(void) {
// check the actual highsore
u8 a;
int i1;
// read the eeprom block
if (!isEepromFormatted() || EepromReadBlock(24, &ebs))
return(0);
for(a=0; a<3; a++) {
i1 = (ebs.data[(a * 10)+8] * 256) + ebs.data[(a * 10)+9];
if (iHighscore > i1) return(a + 1);
}
// highscore is lower as saved highscores
return(0);
}
void copy_highsore(u8 entry_from, u8 entry_to) {
// copy a highscore entry to another slot
u8 a;
// read the eeprom block
for(a=0; a<10; a++) {
ebs.data[(entry_to * 10) + a] = ebs.data[(entry_from * 10) + a];
}
}
void clear_highsore(u8 entry) {
// clear the name in actual entry and set the score to highscore
u8 a;
// clear name
for(a=0; a<8; a++) {
ebs.data[(entry * 10) + a] = 0x20;
}
// set score
ebs.data[(entry * 10) + 8] = iHighscore / 256;
ebs.data[(entry * 10) + 9] = iHighscore % 256;
}