main.c 10 KB

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  1. #include <arm/NXP/LPC17xx/LPC17xx.h>
  2. #include <string.h>
  3. #include "config.h"
  4. #include "obj/autoconf.h"
  5. #include "clock.h"
  6. #include "uart.h"
  7. #include "bits.h"
  8. #include "power.h"
  9. #include "timer.h"
  10. #include "ff.h"
  11. #include "diskio.h"
  12. #include "spi.h"
  13. #include "fileops.h"
  14. #include "fpga.h"
  15. #include "fpga_spi.h"
  16. #include "filetypes.h"
  17. #include "memory.h"
  18. #include "snes.h"
  19. #include "led.h"
  20. #include "sort.h"
  21. #include "cic.h"
  22. #include "tests.h"
  23. #include "cli.h"
  24. #include "sdnative.h"
  25. #include "crc.h"
  26. #include "smc.h"
  27. #include "msu1.h"
  28. #include "rtc.h"
  29. #include "sysinfo.h"
  30. #include "cfg.h"
  31. #define EMC0TOGGLE (3<<4)
  32. #define MR0R (1<<1)
  33. int i;
  34. int sd_offload = 0, ff_sd_offload = 0, sd_offload_tgt = 0;
  35. int sd_offload_partial = 0;
  36. int sd_offload_start_mid = 0;
  37. int sd_offload_end_mid = 0;
  38. uint16_t sd_offload_partial_start = 0;
  39. uint16_t sd_offload_partial_end = 0;
  40. volatile enum diskstates disk_state;
  41. extern volatile tick_t ticks;
  42. extern snes_romprops_t romprops;
  43. extern volatile int reset_changed;
  44. extern volatile cfg_t CFG;
  45. enum system_states {
  46. SYS_RTC_STATUS = 0,
  47. SYS_LAST_STATUS = 1
  48. };
  49. int main(void) {
  50. LPC_GPIO2->FIODIR = BV(4) | BV(5);
  51. LPC_GPIO1->FIODIR = BV(23) | BV(SNES_CIC_PAIR_BIT);
  52. BITBAND(SNES_CIC_PAIR_REG->FIOSET, SNES_CIC_PAIR_BIT) = 1;
  53. LPC_GPIO0->FIODIR = BV(16);
  54. /* connect UART3 on P0[25:26] + SSP0 on P0[15:18] + MAT3.0 on P0[10] */
  55. LPC_PINCON->PINSEL1 = BV(18) | BV(19) | BV(20) | BV(21) /* UART3 */
  56. | BV(3) | BV(5); /* SSP0 (FPGA) except SS */
  57. LPC_PINCON->PINSEL0 = BV(31); /* SSP0 */
  58. /* | BV(13) | BV(15) | BV(17) | BV(19) SSP1 (SD) */
  59. /* pull-down CIC data lines */
  60. LPC_PINCON->PINMODE0 = BV(0) | BV(1) | BV(2) | BV(3);
  61. clock_disconnect();
  62. snes_init();
  63. snes_reset(1);
  64. power_init();
  65. timer_init();
  66. uart_init();
  67. fpga_spi_init();
  68. spi_preinit();
  69. led_init();
  70. /* do this last because the peripheral init()s change PCLK dividers */
  71. clock_init();
  72. LPC_PINCON->PINSEL0 |= BV(20) | BV(21); /* MAT3.0 (FPGA clock) */
  73. led_pwm();
  74. sdn_init();
  75. printf("\n\nsd2snes mk.2\n============\nfw ver.: " CONFIG_VERSION "\ncpu clock: %d Hz\n", CONFIG_CPU_FREQUENCY);
  76. printf("PCONP=%lx\n", LPC_SC->PCONP);
  77. file_init();
  78. cic_init(0);
  79. /* setup timer (fpga clk) */
  80. LPC_TIM3->CTCR=0;
  81. LPC_TIM3->EMR=EMC0TOGGLE;
  82. LPC_TIM3->MCR=MR0R;
  83. LPC_TIM3->MR0=1;
  84. LPC_TIM3->TCR=1;
  85. fpga_init();
  86. fpga_rompgm();
  87. sram_writebyte(0, SRAM_CMD_ADDR);
  88. while(1) {
  89. if(disk_state == DISK_CHANGED) {
  90. sdn_init();
  91. newcard = 1;
  92. }
  93. load_bootrle(SRAM_MENU_ADDR);
  94. set_saveram_mask(0x1fff);
  95. set_rom_mask(0x3fffff);
  96. set_mapper(0x7);
  97. snes_reset(0);
  98. while(get_cic_state() == CIC_FAIL) {
  99. rdyled(0);
  100. readled(0);
  101. writeled(0);
  102. delay_ms(500);
  103. rdyled(1);
  104. readled(1);
  105. writeled(1);
  106. delay_ms(500);
  107. }
  108. /* some sanity checks */
  109. uint8_t card_go = 0;
  110. while(!card_go) {
  111. if(disk_status(0) & (STA_NOINIT|STA_NODISK)) {
  112. snes_bootprint(" No SD Card found! \0");
  113. while(disk_status(0) & (STA_NOINIT|STA_NODISK));
  114. delay_ms(200);
  115. }
  116. file_open((uint8_t*)"/sd2snes/menu.bin", FA_READ);
  117. if(file_status != FILE_OK) {
  118. snes_bootprint(" /sd2snes/menu.bin not found! \0");
  119. while(disk_status(0) == RES_OK);
  120. } else {
  121. card_go = 1;
  122. }
  123. file_close();
  124. }
  125. snes_bootprint(" Loading ... \0");
  126. if(get_cic_state() == CIC_PAIR) {
  127. printf("PAIR MODE ENGAGED!\n");
  128. cic_pair(CIC_NTSC, CIC_NTSC);
  129. }
  130. rdyled(1);
  131. readled(0);
  132. writeled(0);
  133. cfg_load();
  134. cfg_save();
  135. sram_writebyte(cfg_is_last_game_valid(), SRAM_STATUS_ADDR+SYS_LAST_STATUS);
  136. cfg_get_last_game(file_lfn);
  137. sram_writeblock(strrchr((const char*)file_lfn, '/')+1, SRAM_LASTGAME_ADDR, 256);
  138. *fs_path=0;
  139. uint32_t saved_dir_id;
  140. get_db_id(&saved_dir_id);
  141. uint32_t mem_dir_id = sram_readlong(SRAM_DIRID);
  142. uint32_t mem_magic = sram_readlong(SRAM_SCRATCHPAD);
  143. printf("mem_magic=%lx mem_dir_id=%lx saved_dir_id=%lx\n", mem_magic, mem_dir_id, saved_dir_id);
  144. if((mem_magic != 0x12345678) || (mem_dir_id != saved_dir_id) || (newcard)) {
  145. newcard = 0;
  146. /* generate fs footprint (interesting files only) */
  147. uint32_t curr_dir_id = scan_dir(fs_path, NULL, 0, 0);
  148. printf("curr dir id = %lx\n", curr_dir_id);
  149. /* files changed or no database found? */
  150. if((get_db_id(&saved_dir_id) != FR_OK)
  151. || saved_dir_id != curr_dir_id) {
  152. /* rebuild database */
  153. printf("saved dir id = %lx\n", saved_dir_id);
  154. printf("rebuilding database...");
  155. snes_bootprint(" rebuilding database ... \0");
  156. curr_dir_id = scan_dir(fs_path, NULL, 1, 0);
  157. sram_writeblock(&curr_dir_id, SRAM_DB_ADDR, 4);
  158. uint32_t endaddr, direndaddr;
  159. sram_readblock(&endaddr, SRAM_DB_ADDR+4, 4);
  160. sram_readblock(&direndaddr, SRAM_DB_ADDR+8, 4);
  161. printf("%lx %lx\n", endaddr, direndaddr);
  162. printf("sorting database...");
  163. snes_bootprint(" sorting database ... \0");
  164. sort_all_dir(direndaddr);
  165. printf("done\n");
  166. snes_bootprint(" saving database ... \0");
  167. save_sram((uint8_t*)"/sd2snes/sd2snes.db", endaddr-SRAM_DB_ADDR, SRAM_DB_ADDR);
  168. save_sram((uint8_t*)"/sd2snes/sd2snes.dir", direndaddr-(SRAM_DIR_ADDR), SRAM_DIR_ADDR);
  169. fpga_pgm((uint8_t*)"/sd2snes/fpga_base.bit");
  170. printf("done\n");
  171. } else {
  172. printf("saved dir id = %lx\n", saved_dir_id);
  173. printf("different card, consistent db, loading db...\n");
  174. fpga_pgm((uint8_t*)"/sd2snes/fpga_base.bit");
  175. load_sram_offload((uint8_t*)"/sd2snes/sd2snes.db", SRAM_DB_ADDR);
  176. load_sram_offload((uint8_t*)"/sd2snes/sd2snes.dir", SRAM_DIR_ADDR);
  177. }
  178. sram_writelong(curr_dir_id, SRAM_DIRID);
  179. sram_writelong(0x12345678, SRAM_SCRATCHPAD);
  180. } else {
  181. snes_bootprint(" same card, loading db... \0");
  182. printf("same card, loading db...\n");
  183. fpga_pgm((uint8_t*)"/sd2snes/fpga_base.bit");
  184. load_sram_offload((uint8_t*)"/sd2snes/sd2snes.db", SRAM_DB_ADDR);
  185. load_sram_offload((uint8_t*)"/sd2snes/sd2snes.dir", SRAM_DIR_ADDR);
  186. }
  187. /* cli_loop(); */
  188. /* load menu */
  189. fpga_dspx_reset(1);
  190. uart_putc('(');
  191. load_rom((uint8_t*)"/sd2snes/menu.bin", SRAM_MENU_ADDR, 0);
  192. /* force memory size + mapper */
  193. set_rom_mask(0x3fffff);
  194. set_mapper(0x7);
  195. uart_putc(')');
  196. uart_putcrlf();
  197. sram_writebyte(0, SRAM_CMD_ADDR);
  198. if((rtc_state = rtc_isvalid()) != RTC_OK) {
  199. printf("RTC invalid!\n");
  200. sram_writebyte(0xff, SRAM_STATUS_ADDR+SYS_RTC_STATUS);
  201. set_bcdtime(0x20120701000000LL);
  202. set_fpga_time(0x20120701000000LL);
  203. invalidate_rtc();
  204. } else {
  205. printf("RTC valid!\n");
  206. sram_writebyte(0x00, SRAM_STATUS_ADDR+SYS_RTC_STATUS);
  207. set_fpga_time(get_bcdtime());
  208. }
  209. sram_memset(SRAM_SYSINFO_ADDR, 13*40, 0x20);
  210. printf("SNES GO!\n");
  211. snes_reset(1);
  212. fpga_reset_srtc_state();
  213. delay_ms(SNES_RESET_PULSELEN_MS);
  214. sram_writebyte(32, SRAM_CMD_ADDR);
  215. snes_reset(0);
  216. uint8_t cmd = 0;
  217. uint64_t btime = 0;
  218. uint32_t filesize=0;
  219. printf("test sram\n");
  220. while(!sram_reliable()) cli_entrycheck();
  221. printf("ok\n");
  222. //while(1) {
  223. // delay_ms(1000);
  224. // printf("Estimated SNES master clock: %ld Hz\n", get_snes_sysclk());
  225. //}
  226. //sram_hexdump(SRAM_DB_ADDR, 0x200);
  227. //sram_hexdump(SRAM_MENU_ADDR, 0x400);
  228. while(!cmd) {
  229. cmd=menu_main_loop();
  230. printf("cmd: %d\n", cmd);
  231. uart_putc('-');
  232. switch(cmd) {
  233. case SNES_CMD_LOADROM:
  234. get_selected_name(file_lfn);
  235. printf("Selected name: %s\n", file_lfn);
  236. cfg_save_last_game(file_lfn);
  237. cfg_set_last_game_valid(1);
  238. cfg_save();
  239. filesize = load_rom(file_lfn, SRAM_ROM_ADDR, LOADROM_WITH_SRAM | LOADROM_WITH_RESET);
  240. break;
  241. case SNES_CMD_SETRTC:
  242. /* get time from RAM */
  243. btime = sram_gettime(SRAM_PARAM_ADDR);
  244. /* set RTC */
  245. set_bcdtime(btime);
  246. set_fpga_time(btime);
  247. cmd=0; /* stay in menu loop */
  248. break;
  249. case SNES_CMD_SYSINFO:
  250. /* go to sysinfo loop */
  251. sysinfo_loop();
  252. cmd=0; /* stay in menu loop */
  253. break;
  254. case SNES_CMD_LOADSPC:
  255. /* load SPC file */
  256. get_selected_name(file_lfn);
  257. printf("Selected name: %s\n", file_lfn);
  258. filesize = load_spc(file_lfn, SRAM_SPC_DATA_ADDR, SRAM_SPC_HEADER_ADDR);
  259. cmd=0; /* stay in menu loop */
  260. break;
  261. case SNES_CMD_RESET:
  262. /* process RESET request from SNES */
  263. printf("RESET requested by SNES\n");
  264. snes_reset_pulse();
  265. cmd=0; /* stay in menu loop */
  266. break;
  267. case SNES_CMD_LOADLAST:
  268. cfg_get_last_game(file_lfn);
  269. printf("Selected name: %s\n", file_lfn);
  270. filesize = load_rom(file_lfn, SRAM_ROM_ADDR, LOADROM_WITH_SRAM | LOADROM_WITH_RESET);
  271. break;
  272. default:
  273. printf("unknown cmd: %d\n", cmd);
  274. cmd=0; /* unknown cmd: stay in loop */
  275. break;
  276. }
  277. }
  278. printf("cmd was %x, going to snes main loop\n", cmd);
  279. if(romprops.has_msu1 && msu1_loop()) {
  280. prepare_reset();
  281. continue;
  282. }
  283. cmd=0;
  284. uint8_t snes_reset_prev=0, snes_reset_now=0, snes_reset_state=0;
  285. uint16_t reset_count=0;
  286. while(fpga_test() == FPGA_TEST_TOKEN) {
  287. cli_entrycheck();
  288. sleep_ms(250);
  289. sram_reliable();
  290. printf("%s ", get_cic_statename(get_cic_state()));
  291. if(reset_changed) {
  292. printf("reset\n");
  293. reset_changed = 0;
  294. fpga_reset_srtc_state();
  295. }
  296. snes_reset_now=get_snes_reset();
  297. if(snes_reset_now) {
  298. if(!snes_reset_prev) {
  299. printf("RESET BUTTON DOWN\n");
  300. snes_reset_state=1;
  301. reset_count=0;
  302. }
  303. } else {
  304. if(snes_reset_prev) {
  305. printf("RESET BUTTON UP\n");
  306. snes_reset_state=0;
  307. }
  308. }
  309. if(snes_reset_state) {
  310. reset_count++;
  311. } else {
  312. sram_reliable();
  313. snes_main_loop();
  314. }
  315. if(reset_count>4) {
  316. reset_count=0;
  317. prepare_reset();
  318. break;
  319. }
  320. snes_reset_prev = snes_reset_now;
  321. }
  322. /* fpga test fail: panic */
  323. if(fpga_test() != FPGA_TEST_TOKEN){
  324. led_panic();
  325. }
  326. /* else reset */
  327. }
  328. }