File content as of revision 0:572558ddc4fe:

#include "mbed.h"
#include "GD.h"
#include "arduino.h"


#include "pickups2.h"
#include "sprites256.h"
#include "shield.h"

GDClass GD(ARD_MOSI, ARD_MISO, ARD_SCK, ARD_D9, USBTX, USBRX) ;

struct sprite {
    int x;
    int y;
    int vx, vy;
} sprites[256];

void plot() {
    int i;
    for (i = 0; i < 256; i++) {
        GD.sprite(i, sprites[i].x >> 4, sprites[i].y >> 4, i % 47, 0, 0);
    }
}

#define LWALL (0 << 4)
#define RWALL (384 << 4)
#define TWALL (0 << 4)
#define BWALL (284 << 4)

void move() {
    int i;
    sprite *ps;

    for (i = 256, ps = sprites; i--; ps++) {
        if ((ps->x <= LWALL)) {
            ps->x = LWALL;
            ps->vx = -ps->vx;
        }
        if ((ps->x >= RWALL)) {
            ps->x = RWALL;
            ps->vx = -ps->vx;
        }
        if ((ps->y <= TWALL)) {
            ps->y = TWALL;
            ps->vy = -ps->vy;
        }
        if ((ps->y >= BWALL)) {
            ps->y = BWALL;
            ps->vy = -ps->vy;
        }
        ps->x += ps->vx;
        ps->y += ps->vy;
    }
}

void setup() {
    int i;

    GD.begin();

    GD.copy(RAM_PIC, sprites256_pic, sizeof(sprites256_pic));
    GD.copy(RAM_CHR, sprites256_chr, sizeof(sprites256_chr));
    GD.copy(RAM_PAL, sprites256_pal, sizeof(sprites256_pal));

    GD.copy(RAM_SPRIMG, pickups2_img, sizeof(pickups2_img));
    GD.copy(RAM_SPRPAL, pickups2_pal, sizeof(pickups2_pal));

    for (i = 0; i < 256; i++) {
        sprites[i].x = random(400 << 4);
        sprites[i].y = random(300 << 4);
        sprites[i].vx = random(-16,16);
        sprites[i].vy = random(-16,16);
    }
}

void loop() {
    plot();
    move();
}

int main() {
    setup();
    while (1) {
        loop();
    }
}