main.cpp

the test file for GP32 gameboy hack

//////////////////////////////////////////////////////////////////////////////
// main.cpp                                                                 //
//////////////////////////////////////////////////////////////////////////////

//////////////////////////////////////////////////////////////////////////////
// Includes                                                                 //
//////////////////////////////////////////////////////////////////////////////
#include "GP32.h"
#include "smf_fat.h"		// smInit()
#include <stdio.h>			// file i/o
#include <sys/unistd.h>		// chdir

//////////////////////////////////////////////////////////////////////////////
// Typedefs                                                                 //
//////////////////////////////////////////////////////////////////////////////
typedef unsigned short Screen[320][240];

//////////////////////////////////////////////////////////////////////////////
// Variables                                                                //
//////////////////////////////////////////////////////////////////////////////
extern const unsigned short font8x8[8][256][8];
Screen &screen = *(Screen *)0xC7B4000;		// 0x0C800000 - 320*240*2*2 - 0x1000 = 0xC7B4000
int _wherex=0, _wherey=0;

//////////////////////////////////////////////////////////////////////////////
// Print                                                                    //
//////////////////////////////////////////////////////////////////////////////
void Print(const char *s)
{
	_wherex = 0;
	while (*s)
	{
		for (int x=0; x<8; x++)
		{
			for (int y=0; y<8; y++)
			{
				screen[8*_wherex + x][8*(29-_wherey) + y] = font8x8[x][255 - *s][y];
			}
		}
		_wherex++;
		s++;
	}
	_wherey++;
}

//////////////////////////////////////////////////////////////////////////////
// Init                                                                     //
//////////////////////////////////////////////////////////////////////////////
int Init()
{
	// init some registers
	// uhh... crashes?? oh whatever...
	/*{
		CLKCON clkcon;
		clkcon.STOP_BIT = 0;
		clkcon.SL_IDLE = 0;
		clkcon.IDLE_BIT = 0;
		clkcon.LCDC = 1;
		clkcon.USB_host = 1;
		clkcon.USB_device = 1;
		clkcon.PWMTIMER = 1;
		clkcon.MMC = 1;
		clkcon.UART0 = 1;
		clkcon.UART1 = 1;
		clkcon.GPIO = 1;
		clkcon.RTC = 1;
		clkcon.ADC = 1;
		clkcon.IIC = 1;
		clkcon.IIS = 1;
		clkcon.SPI = 1;
		rCLKCON = *(unsigned int *)&clkcon;
	}*/

	// init some more registers
	{
		LCDCON1 lcdcon1;
		lcdcon1.BPPMODE = 12;		// 16 bits mode
		lcdcon1.CLKVAL = 3;
		lcdcon1.ENVID = 1;
		lcdcon1.MMODE = 0;
		lcdcon1.PNRMODE = 3;
		rLCDCON1 = *(unsigned int *)&lcdcon1;
	}

	{
		LCDCON2 lcdcon2;
		lcdcon2.LINEVAL = 320-1;
		lcdcon2.VBPD = 1;
		lcdcon2.VFPD = 2;
		lcdcon2.VSPW = 1;
		rLCDCON2 = *(unsigned int *)&lcdcon2;
	}

	{
		LCDCON3 lcdcon3;
		lcdcon3.HBPD = 6;
		lcdcon3.HFPD = 2;
		lcdcon3.HOZVAL = 240-1;
		rLCDCON3 = *(unsigned int *)&lcdcon3;
	}

	{
		LCDCON4 lcdcon4;
		lcdcon4.ADDVAL = 0;
		lcdcon4.HSPW = 4;
		lcdcon4.PALADDEN = 0;
		rLCDCON4 = *(unsigned int *)&lcdcon4;
	}

	{
		LCDCON5 lcdcon5;
		lcdcon5.BSWP = 0;
		lcdcon5.ENLEND = 0;
		lcdcon5.HSTATUS = 2;
		lcdcon5.HWSWP = 1;
		lcdcon5.INVENDLINE = 0;
		lcdcon5.INVVCLK = 1;
		lcdcon5.INVVD = 0;
		lcdcon5.INVVDEN = 0;
		lcdcon5.INVVFRAME = 1;
		lcdcon5.INVVLINE = 1;
		lcdcon5.VSTATUS = 2;
		lcdcon5.RESERVED4 = 0;
		rLCDCON5 = *(unsigned int *)&lcdcon5;
	}

	{
		LCDSADDR1 lcdsaddr1;
		LCDSADDR2 lcdsaddr2;
		LCDSADDR3 lcdsaddr3;
		lcdsaddr1.LCDBANK = (unsigned int)&screen >> 22;				// bank
		lcdsaddr1.LCDBASEU = ((unsigned int)&screen & 0x3FFFFF) >> 1;	// begin offset (per 16 bits)
		lcdsaddr2.LCDBASEL = lcdsaddr1.LCDBASEU + 320*240;				// end offset (per 16 bits)
		lcdsaddr3.OFFSIZE = 0;
		lcdsaddr3.PAGEWIDTH = 240;
		rLCDSADDR1 = *(unsigned int *)&lcdsaddr1;
		rLCDSADDR2 = *(unsigned int *)&lcdsaddr2;
		rLCDSADDR3 = *(unsigned int *)&lcdsaddr3;
	}

	if (smInit()) { Print("smInit error"); return -1; }
	//if (smMountVol(0, "dev0")) { Print("smMountVol error"); return -1 }		// not needed

	return 0;
}

//////////////////////////////////////////////////////////////////////////////
// main                                                                     //
//////////////////////////////////////////////////////////////////////////////
int main(int argc, char *argv[])
{
	if (Init()) { while (1); }

	// fill display
	{
		for (int x=0; x<320; x++)
		{
			for (int y=0; y<240; y++)
			{
				screen[x][y] = (31)<<11 | (31)<<6 | (y*32/240)<<1;
			}
		}
	}

	Print("Little test...");

	char s[256];
	if (chdir("GAME")) { Print("chdir error"); while (1); }
	if (chdir("..")) { Print("chdir error"); while (1); }
	FILE *f = fopen("/GAME/./../test.txt", "rt");
	if (!f) { Print("fopen error"); while (1); }
	fgets(s, 256, f);
	Print(s);
	if (fclose(f)) { Print("fclose error"); while (1); }

	while (1);

	return 0;
}