firmware: add feature to run previously loaded file

src/Makefile

@@ -55,7 +55,7 @@ TARGET = $(OBJDIR)/sd2snes
 
 
 # List C source files here. (C dependencies are automatically generated.)
-SRC = main.c ff.c ccsbcs.c clock.c uart.c power.c led.c timer.c printf.c spi.c fileops.c rtc.c fpga.c fpga_spi.c snes.c smc.c memory.c filetypes.c faulthandler.c sort.c crc32.c cic.c cli.c xmodem.c irq.c rle.c sdnative.c msu1.c crc16.c sysinfo.c
+SRC = main.c ff.c ccsbcs.c clock.c uart.c power.c led.c timer.c printf.c spi.c fileops.c rtc.c fpga.c fpga_spi.c snes.c smc.c memory.c filetypes.c faulthandler.c sort.c crc32.c cic.c cli.c xmodem.c irq.c rle.c sdnative.c msu1.c crc16.c sysinfo.c cfg.c
 
 # usbcontrol.c usb_hid.c usbhw_lpc.c usbinit.c usbstdreq.c
 

src/ffconf.h

@@ -36,7 +36,7 @@
 /   3: f_lseek is removed in addition to 2. */
 
 
-#define	_USE_STRFUNC	0	/* 0:Disable or 1/2:Enable */
+#define	_USE_STRFUNC	1	/* 0:Disable or 1/2:Enable */
 /* To enable string functions, set _USE_STRFUNC to 1 or 2. */
 
 

src/fileops.c

@@ -55,7 +55,7 @@ void file_open_by_filinfo(FILINFO* fno) {
   file_res = l_openfilebycluster(&fatfs, &file_handle, (TCHAR*)"", fno->clust, fno->fsize);
 }
 
-void file_open(uint8_t* filename, BYTE flags) {
+void file_open(const uint8_t* filename, BYTE flags) {
   if (disk_state == DISK_CHANGED) {
     file_reinit();
     newcard = 1;

src/fileops.h

@@ -40,7 +40,7 @@ uint16_t file_block_off, file_block_max;
 enum filestates file_status;
 
 void file_init(void);
-void file_open(uint8_t* filename, BYTE flags);
+void file_open(const uint8_t* filename, BYTE flags);
 FRESULT dir_open_by_filinfo(DIR* dir, FILINFO* fno_param);
 void file_open_by_filinfo(FILINFO* fno);
 void file_close(void);

src/main.c

@@ -27,6 +27,7 @@
 #include "msu1.h"
 #include "rtc.h"
 #include "sysinfo.h"
+#include "cfg.h"
 
 #define EMC0TOGGLE	(3<<4)
 #define MR0R		(1<<1)
@@ -45,8 +46,11 @@ extern volatile tick_t ticks;
 extern snes_romprops_t romprops;
 extern volatile int reset_changed;
 
+extern volatile cfg_t CFG;
+
 enum system_states {
-  SYS_RTC_STATUS = 0
+  SYS_RTC_STATUS = 0,
+  SYS_LAST_STATUS = 1
 };
 
 int main(void) {
@@ -138,6 +142,11 @@ printf("PCONP=%lx\n", LPC_SC->PCONP);
     readled(0);
     writeled(0);
 
+    cfg_load();
+    cfg_save();
+    sram_writebyte(cfg_is_last_game_valid(), SRAM_STATUS_ADDR+SYS_LAST_STATUS);
+    cfg_get_last_game(file_lfn);
+    sram_writeblock(strrchr((const char*)file_lfn, '/')+1, SRAM_LASTGAME_ADDR, 256);
     *fs_path=0;
     uint32_t saved_dir_id;
     get_db_id(&saved_dir_id);
@@ -238,6 +247,9 @@ printf("PCONP=%lx\n", LPC_SC->PCONP);
 	case SNES_CMD_LOADROM:
 	  get_selected_name(file_lfn);
 	  printf("Selected name: %s\n", file_lfn);
+          cfg_save_last_game(file_lfn);
+          cfg_set_last_game_valid(1);
+          cfg_save();
 	  filesize = load_rom(file_lfn, SRAM_ROM_ADDR, LOADROM_WITH_SRAM | LOADROM_WITH_RESET);
 	  break;
 	case SNES_CMD_SETRTC:
@@ -253,6 +265,11 @@ printf("PCONP=%lx\n", LPC_SC->PCONP);
           sysinfo_loop();
           cmd=0; /* stay in menu loop */
           break;
+        case SNES_CMD_LOADLAST:
+          cfg_get_last_game(file_lfn);
+          printf("Selected name: %s\n", file_lfn);
+          filesize = load_rom(file_lfn, SRAM_ROM_ADDR, LOADROM_WITH_SRAM | LOADROM_WITH_RESET);
+          break;
 	default:
 	  printf("unknown cmd: %d\n", cmd);
 	  cmd=0; /* unknown cmd: stay in loop */

src/memory.h

@@ -39,7 +39,8 @@
 #define SRAM_CMD_ADDR           (0xFF1000L)
 #define SRAM_PARAM_ADDR         (0xFF1004L)
 #define SRAM_STATUS_ADDR        (0xFF1100L)
-#define SRAM_SYSINFO_ADDR       (0xFF1110L)
+#define SRAM_SYSINFO_ADDR       (0xFF1200L)
+#define SRAM_LASTGAME_ADDR      (0xFF1420L)
 #define SRAM_MENU_SAVE_ADDR     (0xFF0000L)
 #define SRAM_SCRATCHPAD         (0xFFFF00L)
 #define SRAM_DIRID              (0xFFFFF0L)

src/snes.h

@@ -30,6 +30,7 @@
 #define SNES_CMD_LOADROM   (1)
 #define SNES_CMD_SETRTC    (2)
 #define SNES_CMD_SYSINFO   (3)
+#define SNES_CMD_LOADLAST  (4)
 
 #define MENU_ERR_OK		(0)
 #define MENU_ERR_NODSP	(1)