feat: initial version

srcs/chip8.c

@@ -0,0 +1,119 @@
+#include "chip8.h"
+#include "memory.h"
+#include "cpu.h"
+#include "input.h"
+#include "libft.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <SDL2/SDL.h>
+
+int chip8_load_rom(t_chip8 *emu, const char *path)
+{
+    FILE *fp = fopen(path, "rb");
+    if (fp == NULL)
+    {
+        return 1;
+    }
+
+    if (memory_load_rom(&emu->memory, fp) == 1)
+    {
+        fclose(fp);
+        return (1);
+    }
+
+    fclose(fp);
+    return (0);
+}
+
+void chip8_init(t_chip8 *emu)
+{
+    ft_memset(emu->keyboard.keyboard, 0, sizeof(emu->keyboard.keyboard));
+
+    memory_init(&emu->memory);
+    memory_load_fontset(&emu->memory);
+
+    memset(emu->v, 0, sizeof(emu->v));
+    memset(emu->stack, 0, sizeof(emu->stack));
+
+    emu->i = 0;
+    emu->pc = 0x200;
+
+    emu->delay_timer = 0;
+    emu->sound_timer = 0;
+
+    emu->sp = 0;
+
+    if (graphics_init(&emu->display) != 0)
+    {
+        printf("Failed to initialize graphics!\n");
+        exit(1);
+    }
+
+    if (graphics_display_ready() != 1)
+    {
+        printf("Graphics display failed to initialize properly!\n");
+        exit(1);
+    }
+
+    emu->running = 1;
+}
+
+void chip8_run(t_chip8 *emu)
+{
+    uint32_t frame_start, frame_end, frame_duration;
+    SDL_Event event;
+
+    while (emu->running)
+    {
+        frame_start = SDL_GetTicks();
+
+        while (SDL_PollEvent(&event))
+        {
+            if (event.type == SDL_QUIT)
+            {
+                emu->running = 0;
+                break;
+            }
+            if (event.type == SDL_KEYDOWN || event.type == SDL_KEYUP)
+            {
+                input_update(&event, emu->keyboard.keyboard);
+            }
+        }
+
+        if (emu->keyboard.waiting_for_key)
+        {
+            uint8_t key = get_pressed_key(emu);
+            if (key != 0xFF)
+            {
+                emu->v[emu->keyboard.key_register] = key;
+                emu->keyboard.waiting_for_key = 0;
+            }
+        }
+        else
+        {
+            for (int i = 0; i < 10; i++)
+            {
+                uint16_t opcode = cpu_fetch(emu);
+                t_instruction instruction = cpu_decode(opcode);
+                cpu_execute(emu, instruction);
+            }
+        }
+
+        if (emu->delay_timer > 0)
+            emu->delay_timer--;
+        if (emu->sound_timer > 0)
+            emu->sound_timer--;
+
+        graphics_render(emu);
+
+        frame_end = SDL_GetTicks();
+        frame_duration = frame_end - frame_start;
+
+        if (frame_duration < FRAME_TIME_MS)
+        {
+            SDL_Delay(FRAME_TIME_MS - frame_duration);
+        }
+    }
+}