int main()
{
InitializeSystem();
SysTick_Config(HCLKFrequency()/100);
InitializeLEDs();
SetLEDs(0x01);
uint8_t *framebuffer1=(uint8_t *)0x20000000;
uint8_t *framebuffer2=(uint8_t *)0x20010000;
SetLEDs(0x03);
memset(framebuffer1,0,320*200);
memset(framebuffer2,0,320*200);
SetLEDs(0x07);
IntializeVGAScreenMode320x200(framebuffer1);
#define NumberOfStars 1050
static struct Star
{
int x,y,dx,f;
} stars[NumberOfStars];
for(int i=0;i<NumberOfStars;i++)
{
stars[i].x=(RandomInteger()%352-16)<<12;
stars[i].y=RandomInteger()%200;
int z=sqrti((NumberOfStars-1-i)*NumberOfStars)*1000/NumberOfStars;
stars[i].dx=6000*1200/(z+200);
stars[i].f=(6-(z*7)/1000)+(RandomInteger()%6)*7;
}
const RLEBitmap *sprites[7*6]={
&Star1_0,&Star2_0,&Star3_0,&Star4_0,&Star5_0,&Star6_0,&Star7_0,
&Star1_1,&Star2_1,&Star3_1,&Star4_1,&Star5_1,&Star6_1,&Star7_1,
&Star1_2,&Star2_2,&Star3_2,&Star4_2,&Star5_2,&Star6_2,&Star7_2,
&Star1_3,&Star2_3,&Star3_3,&Star4_3,&Star5_3,&Star6_3,&Star7_3,
&Star1_4,&Star2_4,&Star3_4,&Star4_4,&Star5_4,&Star6_4,&Star7_4,
&Star1_5,&Star2_5,&Star3_5,&Star4_5,&Star5_5,&Star6_5,&Star7_5,
};
Bitmap frame1,frame2;
InitializeBitmap(&frame1,320,200,320,framebuffer1);
InitializeBitmap(&frame2,320,200,320,framebuffer2);
int frame=0;
while(1)
{
WaitVBL();
Bitmap *currframe;
if(frame&1) { currframe=&frame2; SetFrameBuffer(framebuffer1); }
else { currframe=&frame1; SetFrameBuffer(framebuffer2); }
ClearBitmap(currframe);
for(int i=0;i<NumberOfStars;i++)
{
DrawRLEBitmap(currframe,sprites[stars[i].f],
(stars[i].x>>12)-16,stars[i].y-16);
stars[i].x-=stars[i].dx;
if(stars[i].x<=-16<<12)
{
stars[i].x=(320+16)<<12;
stars[i].y=RandomInteger()%200;
stars[i].f=(stars[i].f%7)+(RandomInteger()%6)*7;
}
}
frame++;
}
}
int main()
{
RCC_ClocksTypeDef RCC_Clocks;
RCC_GetClocksFreq(&RCC_Clocks);
SysTick_Config(RCC_Clocks.HCLK_Frequency / 100);
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
InitializeLEDs();
InitializeUserInterface();
InitializeRandom();
InitializeRumble();
//Clear framebuffers
memset(ADDR_FRAMEBUFFER1, 0x00, 320*200);
memset(ADDR_FRAMEBUFFER2, 0x00, 320*200);
//Create drawing surfaces
InitializeBitmap(&frame1,320,200,320,ADDR_FRAMEBUFFER1);
InitializeBitmap(&frame2,320,200,320,ADDR_FRAMEBUFFER2);
//Switch on VGA
IntializeVGAScreenMode320x200(ADDR_FRAMEBUFFER1);
if(!TheGame) {
EnableDebugOutput(DEBUG_USART);
fprintf(stderr, "PANIC: Game structure pointer is NULL\r\n");
return -1;
}
if(TheGame->currentState)
TheGame->currentState->Init(NULL);
if(!TheGame->currentState->Update || !TheGame->currentState->Draw) {
fprintf(stderr, "PANIC: Update and/or Draw function pointer is NULL\r\n");
return -1;
}
Gamestate *currentState = TheGame->currentState;
while(1)
{
oldTime = currentTime;
currentTime = SysTickCounter;
if (currentState != TheGame->currentState)
{
Gamestate *newState = TheGame->currentState;
if (!newState->initialized) {
newState->Init(currentState);
newState->initialized = true;
}
if (newState->OnEnter)
newState->OnEnter(currentState);
currentState = newState;
}
//Swap Buffers
if(frame&1) { drawingSurface=&frame2; SetFrameBuffer(ADDR_FRAMEBUFFER1); }
else { drawingSurface=&frame1; SetFrameBuffer(ADDR_FRAMEBUFFER2); }
//Update and draw
currentState->Update(currentTime - oldTime);
currentState->Draw(drawingSurface);
frame++;
if (currentState != TheGame->currentState &&
TheGame->currentState->OnLeave)
{
currentState->OnLeave(currentState);
}
//VSync
WaitVBL();
}
}
