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gba.h
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#ifndef GBA_H
#define GBA_H
typedef unsigned int u32;
typedef unsigned short u16;
typedef unsigned char u8;
// ---------------------------------------------------------------------------
// MODE3 MACROS
// ---------------------------------------------------------------------------
#define OFFSET(row, col, width) ((col)+(width)*(row))
#define REG_DISPCNT (*(volatile unsigned short *) 0x4000000)
#define MODE3 3
#define BG2_ENABLE (1<<10)
#define COLOR(r, g, b) ((r) | (g)<<5 | (b)<<10)
#define WHITE COLOR(31, 31, 31)
#define RED COLOR(31, 0, 0)
#define GREEN COLOR(0, 31, 0)
#define BLUE COLOR(0, 0, 31)
#define MAGENTA COLOR(31, 0, 31)
#define CYAN COLOR(0, 31, 31)
#define YELLOW COLOR(31, 31, 0)
#define BLACK COLOR(0, 0, 0)
#define GRAY COLOR(5, 5, 5)
#define LIGHT_GRAY COLOR(20, 20, 20)
// size of the GBA Screen
#define WIDTH 240
#define HEIGHT 160
// initialized in gba.c
extern volatile unsigned short *videoBuffer;
// ---------------------------------------------------------------------------
// BUTTON INPUT
// ---------------------------------------------------------------------------
#define BUTTON_A (1<<0)
#define BUTTON_B (1<<1)
#define BUTTON_SELECT (1<<2)
#define BUTTON_START (1<<3)
#define BUTTON_RIGHT (1<<4)
#define BUTTON_LEFT (1<<5)
#define BUTTON_UP (1<<6)
#define BUTTON_DOWN (1<<7)
#define BUTTON_R (1<<8)
#define BUTTON_L (1<<9)
#define BUTTONS (*(volatile u32 *) 0x4000130)
#define KEY_DOWN(key, buttons) (~(buttons) & (key))
#define KEY_JUST_PRESSED(key, buttons, oldbuttons) (KEY_DOWN(key, buttons) & ~KEY_DOWN(key, oldbuttons))
// ---------------------------------------------------------------------------
// DMA
// ---------------------------------------------------------------------------
typedef struct
{
const volatile void *src;
const volatile void *dst;
u32 cnt;
} DMA_CONTROLLER;
#define DMA ((volatile DMA_CONTROLLER *) 0x040000B0)
// Defines
#define DMA_CHANNEL_0 0
#define DMA_CHANNEL_1 1
#define DMA_CHANNEL_2 2
#define DMA_CHANNEL_3 3
#define DMA_DESTINATION_INCREMENT (0 << 21)
#define DMA_DESTINATION_DECREMENT (1 << 21)
#define DMA_DESTINATION_FIXED (2 << 21)
#define DMA_DESTINATION_RESET (3 << 21)
#define DMA_SOURCE_INCREMENT (0 << 23)
#define DMA_SOURCE_DECREMENT (1 << 23)
#define DMA_SOURCE_FIXED (2 << 23)
#define DMA_REPEAT (1 << 25)
#define DMA_16 (0 << 26)
#define DMA_32 (1 << 26)
#define DMA_NOW (0 << 28)
#define DMA_AT_VBLANK (1 << 28)
#define DMA_AT_HBLANK (2 << 28)
#define DMA_AT_REFRESH (3 << 28)
#define DMA_IRQ (1 << 30)
#define DMA_ON (1 << 31)
// ---------------------------------------------------------------------------
// VBLANK
// ---------------------------------------------------------------------------
#define SCANLINECOUNTER (*(volatile unsigned short *) 0x4000006)
extern u32 vBlankCounter;
void waitForVBlank(void);
// ---------------------------------------------------------------------------
// MISC
// ---------------------------------------------------------------------------
#define UNUSED(param) ((void)((param)))
/*
* Generates a pseudo-random number between min and max.
*
* @param min bottom end of range (inclusive).
* @param max top end of range (exclusive).
* @return random number in the given range.
*/
int randint(int min, int max);
// ---------------------------------------------------------------------------
// DRAWING
// ---------------------------------------------------------------------------
void setPixel(int row, int col, u16 color);
void drawRectDMA(int row, int col, int width, int height, volatile u16 color);
void drawFullScreenImageDMA(const u16 *image);
void drawImageDMA(int row, int col, int width, int height, const u16 *image);
void undrawImageDMA(int row, int col, int width, int height, const u16 *image);
void fillScreenDMA(volatile u16 color);
void drawChar(int row, int col, char ch, u16 color);
void drawString(int row, int col, char *str, u16 color);
void drawCenteredString(int row, int col, int width, int height, char *str, u16 color);
/* Contains the pixels of each character from a 6x8 font */
extern const unsigned char fontdata_6x8[12288];
#endif