finale

.gitignore

@@ -0,0 +1,5 @@
+*.c.o
+*.S.o
+outfile*
+/.deps
+.vscode

delay.S

@@ -29,10 +29,11 @@ hexasc:
 	addi $v0,$a0,0x30 
 	jr $ra
 	nop
+
 
 delay:
 	PUSH $s3
-	li $s3, 47000
+	li $s3, 470000
 	li $t6, 0
 	li $t7, 0
 	j loop

display.c

@@ -67,7 +67,8 @@ void display_init(void){
 	spi_send_recv(0xAF);
 }
 
-void display_string(int line, char *s) { //LAB
+/*(TAKEN FROM LAB) Display text*/
+void display_string(int line, char *s) { 
 	int i;
 	if(line < 0 || line >= 4)
 		return;
@@ -81,6 +82,7 @@ void display_string(int line, char *s) { //LAB
 			textbuffer[line][i] = ' ';
 }
 
+/*(TAKEN FROM LAB) Display text*/
 void display_update(void) { //LAB
 	int i, j, k;
 	int c;
@@ -125,6 +127,8 @@ void display_image(int x, const uint8_t *data) { //LAB
 	}
 }
 
+/*This function translates the display array to oled_display array. 
+It converts an x and y coordinate system into a readable array for the computer.*/
 void translateToImage() {
   int page, column, row, c, k;
   uint8_t powerOfTwo = 1;
@@ -147,19 +151,8 @@ void translateToImage() {
   }
 }
 
-void create_object(int xPos, int yPos, int width, int height) {
-  int row, column;
-
-  for (row = 0; row < 32; row++) {
-    for (column = 0; column < 128; column++) {
-      if (row >= yPos && row <= (yPos + height) && column >= xPos && column <= (xPos + width)) {
-        display[row][column] = 1;
-      }
-    }
-  }
-}
-
-void clear_display() {
+/*This function sets all the values in the display array and oled display array into 0s*/
+void clear_display() { 
   int row, column, i;
 
   for(row = 0; row < 32; row++) {
@@ -173,12 +166,12 @@ void clear_display() {
   }
 }
 
+/*This function calls all the necessary functions for the game to start*/
 void display_start(){
-	clear_display();
-	snake();
-	//create_object(64,16,1,1);
-	translateToImage();
-	display_image(0, oled_display);
+	clear_display(); //This clear the screen everytime it loops. It will clear the last frame
+	game(); //Call game
+	translateToImage(); //Translate 
+	display_image(0, oled_display); //And then display the frame
 }
 
 

game.c

@@ -1,54 +1,164 @@
 /*Written by Fredrik Lundström and Michell Dib 2021 (c)*/
 
 #include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
 #include <pic32mx.h> 
 #include "snake.h" //Project header file
 
-int score = 0;
-int speed = 20;
+int btns;
+int speed = 1000; //Higher is slower
 
+//We made premade apples since the time.h library would not work on the Uno32
+int apple_x[] = {
+    56,
+    39,
+    28,
+    95,
+    46,
+    107,
+    13,
+    69,
+    65,
+    11,
+    28,
+    82
+};
 
-int snake_length;
-int snake_width = 1;
-int snake_x = 64;
-int snake_y = 16;
+int apple_y[] = {
+    10,
+    29,
+    20,
+    9,
+    15,
+    3,
+    21,
+    27,
+    11,
+    17,
+    8,
+    12
+};
 
-int apple_x;
-int apple_y;
-
-void snake(){
-    snake_create();
-    apple_create();
+void game(){ 
+    snake_move(); //First we will call for the snake movements
+    if(snake.y[0] == apple_y[score] && snake.x[0] == apple_x[score]){ //If we collide with apple
+        eat_apple(); //Call eat_apple function
+    }
+    if((snake.y[0] == 32 || snake.y[0] == 0) || (snake.x[0] == 128 || snake.x[0] == 0)){ //If we collide with wall
+        collision(); //Call collision function
+    }
+    create_snake(); //After movements are made we create the snake
 
-    if(snake_x == apple_x && snake_y == apple_y){
-        apple_eat();
+    int k;
+    for(k = snake.length - 1; k > 0; k--){ // This for loop check if the head will collide with any coordinate of the body
+        if(snake.x[0] == snake.x[k] && snake.y[0] == snake.y[k])
+            collision();
     }
+
+    create_apple(); //Every frame we create an apple based on the score that changes the apples coordinates to any of the premade values.
     delay(speed);
-    snake_move();
 }
 
-void snake_create(){
-    snake_length = 5;
-    create_object(snake_x, snake_y, snake_length, snake_width);
+void collision(){
+    char score2[] = "X";
+    score2[0] = score + '0'; //Here we make an integer to a string
+
+    while(btns != 0b1000){ //While BTN4 is not pressed we will display the score and a game over string.
+        clear_display();
+        display_string(1, "GAME OVER SCORE: ");
+        display_string(2, score2);
+        display_update();
+        translateToImage();
+	    display_image(0, oled_display);
+        btns = getbtns();
+    }
+    main(); //If BTN4 is pressed we jump back to main and the game will then restart. 
 }
 
-void snake_move(){
-    if(snake_x > 128){
-        snake_x = 0;
-    }else{
-        snake_x++;  
+
+void create_snake(){ //Here we will print out the snake
+    int i,j,k,x,y;
+    for(k = 0; k < snake.length; k++){
+        for(i = 0; i < 1; i++){ //These for-loops can change the size of the snake but we decided to go with one pixel
+            for(j = 0; j < 1; j++){
+                x = snake.x[k] + i;
+                y = snake.y[k] + j;
+
+                display[y][x] = 1; 
+            }
+        }
+    }
+}
+
+void snake_move(){ //MOVEMENT FOR SNAKE
+
+    btns = getbtns(); //Get buttons
+
+    int i;
+    for(i = snake.length - 1; i > 0; i--){ //This for loop will change the coordinates of every part of the snake so that the body will follow the head
+        snake.x[i] = snake.x[i - 1];
+        snake.y[i] = snake.y[i - 1];
     }
+
+    if(snake.dir == 'R'){ //RIGHT
+        snake.x[0] += 1;
+    }
+    if(snake.dir == 'D'){ //DOWN
+        snake.y[0] += 1;
+    }
+    if(snake.dir == 'U'){ //UP
+        snake.y[0] -= 1;
+    }
+    if(snake.dir == 'L'){ //LEFT
+        snake.x[0] -= 1;
+    }
+
+    /*for(k = snake.length - 1; k > 0; k--){ // This for loop check if the head will collide with any coordinate of the body
+        if(snake.x[0] == snake.x[k] && snake.y[0] == snake.y[k])
+            collision();
+    }*/
+
+    //  SO THE UNO32 REMEMBER THE DIRECTION EVEN AFTER THE BUTTON IS RELEASED
+    if(snake.dir != 'L'){
+        if(btns == 0b0001){ //RIGHT
+            snake.dir = 'R';
+        }
+    }
+    if(snake.dir != 'U'){
+        if(btns == 0b0010){ //DOWN
+            snake.dir = 'D';
+        }
+    }
+    if(snake.dir != 'D'){
+        if(btns == 0b0100){ //UP
+            snake.dir = 'U';
+        }
+    }
+    if(snake.dir != 'R'){
+        if(btns == 0b1000){ //LEFT
+            snake.dir = 'L';
+        }
+    }
+}
+
+void create_apple(){
+    //RANDOMIZE POSITION does not work :(
+    display[apple_y[score]][apple_x[score]] = 1; //Display apple
 }
 
-void apple_create(){
-    //Randomize 
-    create_object(apple_x, apple_y, 1, 1);
+void eat_apple(){
+    snake.length++; //Increase length
+    score++; //Increase score which will also give the apple new coordinates 
 }
 
-void apple_eat(){
-    display[apple_x][apple_y] = 0; //Clear apple pixel
-    apple_x = 5;
-    apple_y = 5;
-    apple_create();
-    score++;
+int getbtns(void){ //Get btns
+    int btn = (PORTD >> 5) & 0x0007;
+    btn = (btn << 1);
+                                    //Since the buttons was set to bits 11 through 5 we will now
+                                    //shift the bits 5 bits the right and check them with and operation
+                                   //and then see if buttons 4,3 or 2 are active.  
+                                   // & them with seven since it is 0b0111 and button 1 will then always be 0
+    btn = ((PORTF >> 1) & 0x1) | btn;  //For some reason the first button is in the portf register                              
+    return btn; //Return the active buttons as integer (active bits will be 1)
 }

main.c

@@ -51,13 +51,44 @@ int main(void){
 	/* SPI2CON bit ON = 1; */
 	SPI2CONSET = 0x8000;
 
-	display_init(); //Initialize OLED display
+	display_init(); //Initialize OLED display 
+
+	score = 0; //Set score to one
+
+	snake.y = snakeY; //Set y to array
+	snake.x = snakeX; //Set x to array
+
+	snake.y[0] = 16; //Initialize snake
+	snake.x[0] = 64; //We make the snake big at first for demonstration purposes only
+	snake.y[1] = 16;
+	snake.x[1] = 65;
+	snake.y[2] = 16;
+	snake.x[2] = 66;
+	snake.y[3] = 16;
+	snake.x[3] = 67;
+	snake.y[4] = 16;
+	snake.x[4] = 68;
+	snake.y[5] = 16;
+	snake.x[5] = 69;
+	snake.y[6] = 16;
+	snake.x[6] = 70;
+	snake.y[7] = 16;
+	snake.x[7] = 71;
+	snake.y[8] = 16;
+	snake.x[8] = 72;
+	snake.y[9] = 16;
+	snake.x[9] = 73;
+
 
+	snake.length = 10;
+	snake.dir = 'L'; 
+
 	while(1){
-		display_start();
+		display_start(); //Start display
 	}
-	
+
 	return;
 }
 
 
+