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之前已经实现了NES模拟器玩游戏。W801学习笔记九：HLK-W801制作学习机/NES游戏机(模拟器)

现在要在新版本掌机中移植过来。

1、把NES文件都拷贝到SD卡中。

这回不会受内存大小限制了。我这里拷贝了4个，还可以拷贝更多。

 2、应用初始化中，加载NES文件。

把NES文件名在菜单中进行绑定，动态加载到PSRAM中

int NesSim::scean_init(cJSON*  param){char * fileName= cJSON_GetObjectItem(param,"f")->valuestring;int sk = cJSON_GetObjectItem(param,"k")->valueint;size_t readsize = fatfs_readFile(fileName, &romData);LCD_Clear(BLACK);if(0!=InfoNES_Load((BYTE*)romData,sk)){printf("InfoNES_Load fail \n");}else{ printf("InfoNES_Load success \n");InfoNES_Main();} return 0;
}

k参数用于设置跳过的帧数，以提高最终游戏帧率。

3、修改并确认按键。

InfoNES_system.c

void InfoNES_PadState( DWORD *pdwPad1, DWORD *pdwPad2, DWORD *pdwSystem )
{u32 keys = KEY_INPUTB;*pdwPad1 = 0;if(!(keys & (0x1 << KEY_GPIO_UP))){*pdwPad1 |= PAD_JOY_UP;}if(!(keys & (0x1 << KEY_GPIO_DOWN))){*pdwPad1 |= PAD_JOY_DOWN;}if(!(keys & (0x1 << KEY_GPIO_LEFT))){*pdwPad1 |= PAD_JOY_LEFT;}if(!(keys & (0x1 << KEY_GPIO_RHT))){*pdwPad1 |= PAD_JOY_RIGHT;}if(!(keys & (0x1 <<KEY_GPIO_SEL))){*pdwPad1 |= PAD_JOY_START;}if(!(keys & (0x1 << KEY_GPIO_A))){*pdwPad1 |= PAD_JOY_A;}if(!(keys & (0x1 << KEY_GPIO_B))){*pdwPad1 |= PAD_JOY_B;}if(!(keys & (0x1 << KEY_GPIO_EXIT))){*pdwPad1 |= PAD_JOY_SELECT;}}

KeyAdepter.h

#define KEY_GPIO_LEFT 	27
#define KEY_GPIO_DOWN 	18
#define KEY_GPIO_RHT 	17
#define KEY_GPIO_UP	 	16
#define KEY_GPIO_A 		21
#define KEY_GPIO_B 		23
#define KEY_GPIO_C 		22
#define KEY_GPIO_D 		24#define KEY_GPIO_SEL 	26
#define KEY_GPIO_EXIT 	25#define KEY_INPUTB (*(TLS_REG*)(HR_GPIO_DATA + TLS_IO_AB_OFFSET))

4、在菜单中加入模拟器游戏

。。。{"t": "NES 模拟器","i": "-","d": 0,"g": {},"s": [{"t": "魂斗罗","i": "-","d": 400,"g": {"f":"nes/hdl.nes", "k":1},"s": []},{"t": "沙罗曼蛇II","i": "-","d": 400,"g": {"f":"nes/slms.nes", "k":1},"s": []},{"t": "马戏团","i": "-","d": 400,"g": {"f":"nes/mxt.nes", "k":1},"s": []},{"t": "超级马里奥","i": "-","d": 400,"g": {"f":"nes/cjmla.nes", "k":2},"s": []}]}
。。。

5、修改游戏加载

InfoNES.c

int InfoNES_Load( BYTE * rom, int sk)
{
/**  Load a cassette**  Parameters*    const char *pszFileName            (Read)*      File name of ROM image**  Return values*     0 : It was finished normally.*    -1 : An error occurred.**  Remarks*    Read a ROM image in the memory. *    Reset InfoNES.*/// Release a memory for ROMInfoNES_ReleaseRom();// Read a ROM image in the memoryGameFrameSkip = sk;if ( InfoNES_ReadRom( rom ) < 0 )return -1;// Reset InfoNESif ( InfoNES_Reset() < 0 )return -1;// Successfulreturn 0;
}