arm 2440 linux 应用程序 nes 红白机模拟器 第2篇 InfoNES
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InfoNES 支持 map ，声音，代码比较少，方便 移值。
在上个 LiteNES 的基础上，其实不到半小时就移值好了这个，但问题是，一直是黑屏。InfoNES_LoadFrame () WorkFrame 中一直是 0 。
解决的过程很漫长，最终看到 说是 ADS 中 有符号 无符号的问题，但是 这里用的是 makefile 不是 ADS ，试着改了 makefile 加上 CCFLAGS = -O2 -fsigned-char 。
终于有输出了，性能还算不错。
InfoNES 源码 http://www.zophar.net/pocket-pc/nes/infonesft.html
主要修改的是 InfoNES_System_Linux.cpp 和 Makefile
同样的，现在仅实现显示未加输入，声音，全屏等。后期在加。
InfoNES_System_Linux.cpp
1 /*===================================================================*/ 2 /* */ 3 /* InfoNES_System_Linux.cpp : Linux specific File */ 4 /* */ 5 /* 2001/05/18 InfoNES Project ( Sound is based on DarcNES ) */ 6 /* */ 7 /*===================================================================*/ 8 9 /*-------------------------------------------------------------------*/ 10 /* Include files */ 11 /*-------------------------------------------------------------------*/ 12 13 #include <stdio.h> 14 #include <stdlib.h> 15 #include <string.h> 16 #include <pthread.h> 17 18 #include <sys/types.h> 19 #include <sys/stat.h> 20 #include <fcntl.h> 21 #include <sys/ioctl.h> 22 #include <unistd.h> 23 #include <sys/soundcard.h> 24 25 #include "../InfoNES.h" 26 #include "../InfoNES_System.h" 27 #include "../InfoNES_pAPU.h" 28 29 //bool define 30 #define TRUE 1 31 #define FALSE 0 32 33 /* lcd 操作相关 头文件 */ 34 #include <sys/types.h> 35 #include <sys/stat.h> 36 #include <fcntl.h> 37 #include <linux/fb.h> 38 #include <sys/ioctl.h> 39 #include <unistd.h> 40 #include <string.h> 41 #include <sys/mman.h> 42 43 static int fb_fd; 44 static unsigned char *fb_mem; 45 static int px_width; 46 static int line_width; 47 static int screen_width; 48 static struct fb_var_screeninfo var; 49 50 static int lcd_fb_display_px(WORD color, int x, int y) 51 { 52 unsigned char *pen8; 53 unsigned short *pen16; 54 55 pen8 = (unsigned char *)(fb_mem + y*line_width + x*px_width); 56 pen16 = (unsigned short *)pen8; 57 *pen16 = color; 58 59 return 0; 60 } 61 62 static int lcd_fb_init() 63 { 64 //如果使用 mmap 打开方式 必须是 读定方式 65 fb_fd = open("/dev/fb0", O_RDWR); 66 if(-1 == fb_fd) 67 { 68 printf("cat\'t open /dev/fb0 \\n"); 69 return -1; 70 } 71 //获取屏幕参数 72 if(-1 == ioctl(fb_fd, FBIOGET_VSCREENINFO, &var)) 73 { 74 close(fb_fd); 75 printf("cat\'t ioctl /dev/fb0 \\n"); 76 return -1; 77 } 78 79 //计算参数 80 px_width = var.bits_per_pixel / 8; 81 line_width = var.xres * px_width; 82 screen_width = var.yres * line_width; 83 84 fb_mem = (unsigned char *)mmap(NULL, screen_width, PROT_READ | PROT_WRITE, MAP_SHARED, fb_fd, 0); 85 if(fb_mem == (void *)-1) 86 { 87 close(fb_fd); 88 printf("cat\'t mmap /dev/fb0 \\n"); 89 return -1; 90 } 91 //清屏 92 memset(fb_mem, 0 , screen_width); 93 return 0; 94 } 95 96 /*-------------------------------------------------------------------*/ 97 /* ROM image file information */ 98 /*-------------------------------------------------------------------*/ 99 100 char szRomName[256]; 101 char szSaveName[256]; 102 int nSRAM_SaveFlag; 103 104 /*-------------------------------------------------------------------*/ 105 /* Constants ( Linux specific ) */ 106 /*-------------------------------------------------------------------*/ 107 108 #define VBOX_SIZE 7 109 #define SOUND_DEVICE "/dev/dsp" 110 #define VERSION "InfoNES v0.91J" 111 112 /*-------------------------------------------------------------------*/ 113 /* Global Variables ( Linux specific ) */ 114 /*-------------------------------------------------------------------*/ 115 116 /* Emulation thread */ 117 pthread_t emulation_tid; 118 int bThread; 119 120 /* Pad state */ 121 DWORD dwKeyPad1; 122 DWORD dwKeyPad2; 123 DWORD dwKeySystem; 124 125 /* For Sound Emulation */ 126 BYTE final_wave[2048]; 127 int waveptr; 128 int wavflag; 129 int sound_fd; 130 131 /*-------------------------------------------------------------------*/ 132 /* Function prototypes ( Linux specific ) */ 133 /*-------------------------------------------------------------------*/ 134 135 void *emulation_thread( void *args ); 136 137 138 void start_application( char *filename ); 139 140 141 int LoadSRAM(); 142 143 144 int SaveSRAM(); 145 146 147 /* Palette data */ 148 WORD NesPalette[64] = 149 { 150 0x39ce, 0x1071, 0x0015, 0x2013, 0x440e, 0x5402, 0x5000, 0x3c20, 151 0x20a0, 0x0100, 0x0140, 0x00e2, 0x0ceb, 0x0000, 0x0000, 0x0000, 152 0x5ef7, 0x01dd, 0x10fd, 0x401e, 0x5c17, 0x700b, 0x6ca0, 0x6521, 153 0x45c0, 0x0240, 0x02a0, 0x0247, 0x0211, 0x0000, 0x0000, 0x0000, 154 0x7fff, 0x1eff, 0x2e5f, 0x223f, 0x79ff, 0x7dd6, 0x7dcc, 0x7e67, 155 0x7ae7, 0x4342, 0x2769, 0x2ff3, 0x03bb, 0x0000, 0x0000, 0x0000, 156 0x7fff, 0x579f, 0x635f, 0x6b3f, 0x7f1f, 0x7f1b, 0x7ef6, 0x7f75, 157 0x7f94, 0x73f4, 0x57d7, 0x5bf9, 0x4ffe, 0x0000, 0x0000, 0x0000 158 }; 159 160 /*===================================================================*/ 161 /* */ 162 /* main() : Application main */ 163 /* */ 164 /*===================================================================*/ 165 166 /* Application main */ 167 int main( int argc, char **argv ) 168 { 169 int i; 170 171 /*-------------------------------------------------------------------*/ 172 /* Pad Control */ 173 /*-------------------------------------------------------------------*/ 174 175 /* Initialize a pad state */ 176 dwKeyPad1 = 0; 177 dwKeyPad2 = 0; 178 dwKeySystem = 0; 179 180 /*-------------------------------------------------------------------*/ 181 /* Load Cassette & Create Thread */ 182 /*-------------------------------------------------------------------*/ 183 184 /* Initialize thread state */ 185 bThread = FALSE; 186 187 /* If a rom name specified, start it */ 188 if ( argc == 2 ) 189 { 190 start_application( argv[1] ); 191 } 192 193 lcd_fb_init(); 194 195 //主循环不要让程序退出 196 while(1) 197 { 198 199 } 200 return(0); 201 } 202 203 204 /*===================================================================*/ 205 /* */ 206 /* emulation_thread() : Thread Hooking Routine */ 207 /* */ 208 /*===================================================================*/ 209 210 void *emulation_thread( void *args ) 211 { 212 InfoNES_Main(); 213 } 214 215 216 /*===================================================================*/ 217 /* */ 218 /* start_application() : Start NES Hardware */ 219 /* */ 220 /*===================================================================*/ 221 void start_application( char *filename ) 222 { 223 /* Set a ROM image name */ 224 strcpy( szRomName, filename ); 225 226 /* Load cassette */ 227 if ( InfoNES_Load( szRomName ) == 0 ) 228 { 229 /* Load SRAM */ 230 LoadSRAM(); 231 232 /* Create Emulation Thread */ 233 bThread = TRUE; 234 pthread_create( &emulation_tid, NULL, emulation_thread, NULL ); 235 } 236 } 237 238 239 /*===================================================================*/ 240 /* */ 241 /* LoadSRAM() : Load a SRAM */ 242 /* */ 243 /*===================================================================*/ 244 int LoadSRAM() 245 { 246 /* 247 * Load a SRAM 248 * 249 * Return values 250 * 0 : Normally 251 * -1 : SRAM data couldn\'t be read 252 */ 253 254 FILE *fp; 255 unsigned char pSrcBuf[SRAM_SIZE]; 256 unsigned char chData; 257 unsigned char chTag; 258 int nRunLen; 259 int nDecoded; 260 int nDecLen; 261 int nIdx; 262 263 /* It doesn\'t need to save it */ 264 nSRAM_SaveFlag = 0; 265 266 /* It is finished if the ROM doesn\'t have SRAM */ 267 if ( !ROM_SRAM ) 268 return(0); 269 270 /* There is necessity to save it */ 271 nSRAM_SaveFlag = 1; 272 273 /* The preparation of the SRAM file name */ 274 strcpy( szSaveName, szRomName ); 275 strcpy( strrchr( szSaveName, \'.\' ) + 1, "srm" ); 276 277 /*-------------------------------------------------------------------*/ 278 /* Read a SRAM data */ 279 /*-------------------------------------------------------------------*/ 280 281 /* Open SRAM file */ 282 fp = fopen( szSaveName, "rb" ); 283 if ( fp == NULL ) 284 return(-1); 285 286 /* Read SRAM data */ 287 fread( pSrcBuf, SRAM_SIZE, 1, fp ); 288 289 /* Close SRAM file */ 290 fclose( fp ); 291 292 /*-------------------------------------------------------------------*/ 293 /* Extract a SRAM data */ 294 /*-------------------------------------------------------------------*/ 295 296 nDecoded = 0; 297 nDecLen = 0; 298 299 chTag = pSrcBuf[nDecoded++]; 300 301 while ( nDecLen < 8192 ) 302 { 303 chData = pSrcBuf[nDecoded++]; 304 305 if ( chData == chTag ) 306 { 307 chData = pSrcBuf[nDecoded++]; 308 nRunLen = pSrcBuf[nDecoded++]; 309 for ( nIdx = 0; nIdx < nRunLen + 1; ++nIdx ) 310 { 311 SRAM[nDecLen++] = chData; 312 } 313 }else { 314 SRAM[nDecLen++] = chData; 315 } 316 } 317 318 /* Successful */ 319 return(0); 320 } 321 322 323 /*===================================================================*/ 324 /* */ 325 /* SaveSRAM() : Save a SRAM */ 326 /* */ 327 /*===================================================================*/ 328 int SaveSRAM() 329 { 330 /* 331 * Save a SRAM 332 * 333 * Return values 334 * 0 : Normally 335 * -1 : SRAM data couldn\'t be written 336 */ 337 338 FILE *fp; 339 int nUsedTable[256]; 340 unsigned char chData; 341 unsigned char chPrevData; 342 unsigned char chTag; 343 int nIdx; 344 int nEncoded; 345 int nEncLen; 346 int nRunLen; 347 unsigned char pDstBuf[SRAM_SIZE]; 348 349 if ( !nSRAM_SaveFlag ) 350 return(0); /* It doesn\'t need to save it */ 351 352 /*-------------------------------------------------------------------*/ 353 /* Compress a SRAM data */ 354 /*-------------------------------------------------------------------*/ 355 356 memset( nUsedTable, 0, sizeof nUsedTable ); 357 358 for ( nIdx = 0; nIdx < SRAM_SIZE; ++nIdx ) 359 { 360 ++nUsedTable[SRAM[nIdx++]]; 361 } 362 for ( nIdx = 1, chTag = 0; nIdx < 256; ++nIdx ) 363 { 364 if ( nUsedTable[nIdx] < nUsedTable[chTag] ) 365 chTag = nIdx; 366 } 367 368 nEncoded = 0; 369 nEncLen = 0; 370 nRunLen = 1; 371 372 pDstBuf[nEncLen++] = chTag; 373 374 chPrevData = SRAM[nEncoded++]; 375 376 while ( nEncoded < SRAM_SIZE && nEncLen < SRAM_SIZE - 133 ) 377 { 378 chData = SRAM[nEncoded++]; 379 380 if ( chPrevData == chData && nRunLen < 256 ) 381 ++nRunLen; 382 else{ 383 if ( nRunLen >= 4 || chPrevData == chTag ) 384 { 385 pDstBuf[nEncLen++] = chTag; 386 pDstBuf[nEncLen++] = chPrevData; 387 pDstBuf[nEncLen++] = nRunLen - 1; 388 }elsearm linux 应用程序 nes 红白机模拟器 第1篇jz2440: linux/arch/arm/下面的plat-和mach-
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