Changed the chainloader to load payloads named "BUTTON_NAME.bin", to remember which payload is which. Original idea and code by @habbbe (many thanks!)

injector/source/patcher.c

@@ -382,8 +382,8 @@ void patchCode(u64 progId, u8 *code, u32 size)
                 patchMemory(code, size,
                     verPattern,
                     sizeof(verPattern) - sizeof(u16), 0,
-                    !currentNand ? ((matchingFirm) ? u" Sys" : u"SysA") :
-                                   ((currentNand == 1) ? (matchingFirm ? u" Emu" : u"EmuA") : ((matchingFirm) ? u"Emu2" : u"Em2A")),
+                    !currentNand ? ((matchingFirm) ? u" Sys" : u"SysE") :
+                                   ((currentNand == 1) ? (matchingFirm ? u" Emu" : u"EmuS") : ((matchingFirm) ? u"Emu2" : u"Em2S")),
                     sizeof(verPattern) - sizeof(u16), 1
                 );
             }

loader/source/buttons.h

@@ -3,11 +3,10 @@
 #include "types.h"
 
 #define HID_PAD      (*(vu32 *)0x10146000 ^ 0xFFF)
-#define BUTTON_X      (1 << 10)
-#define BUTTON_Y      (1 << 11)
-#define BUTTON_R1     (1 << 8)
-#define BUTTON_SELECT (1 << 2)
 #define BUTTON_RIGHT (1 << 4)
 #define BUTTON_LEFT  (1 << 5)
 #define BUTTON_UP    (1 << 6)
 #define BUTTON_DOWN  (1 << 7)
+#define BUTTON_X     (1 << 10)
+#define BUTTON_Y     (1 << 11)
+#define BUTTON_R1    (1 << 8)

loader/source/fatfs/ffconf.h

@@ -15,7 +15,7 @@
 /  and optional writing functions as well. */
 
 
-#define _FS_MINIMIZE	3
+#define _FS_MINIMIZE	1
 /* This option defines minimization level to remove some basic API functions.
 /
 /   0: All basic functions are enabled.
@@ -34,7 +34,7 @@
 /  2: Enable with LF-CRLF conversion. */
 
 
-#define _USE_FIND		0
+#define _USE_FIND		1
 /* This option switches filtered directory read feature and related functions,
 /  f_findfirst() and f_findnext(). (0:Disable or 1:Enable) */
 

loader/source/main.c

@@ -3,25 +3,38 @@
 #include "fatfs/ff.h"
 
 #define PAYLOAD_ADDRESS	0x23F00000
-#define PAYLOADS_FOLDER "/aurei/payloads/"
-#define PAYLOAD_PATH(a) PAYLOADS_FOLDER a ".bin"
+#define LOAD_PAYLOAD(a) loadPayload(a "_*.bin")
 
-static u32 loadPayload(const char *path)
+static u32 loadPayload(const char *pattern)
 {
+    char path[30] = "/aurei/payloads";
+
+    DIR dir;
+    FILINFO info = { .lfname = NULL };
+
+    FRESULT result = f_findfirst(&dir, &info, path, pattern);
+
+    f_closedir(&dir);
+
+    if(result != FR_OK || !info.fname[0])
+        return 0;
+
+    path[15] = '/';
+    u32 i;
+    for(i = 0; info.fname[i]; i++)
+        path[16 + i] = info.fname[i];
+    path[16 + i] = '\0';
+
     FIL payload;
     unsigned int br;
 
-    if(f_open(&payload, path, FA_READ) == FR_OK)
-    {
+    f_open(&payload, path, FA_READ);
     f_read(&payload, (void *)PAYLOAD_ADDRESS, f_size(&payload), &br);
     f_close(&payload);
 
     return 1;
 }
 
-    return 0;
-}
-
 void main(void)
 {
     FATFS fs;
@@ -31,14 +44,13 @@ void main(void)
     //Get pressed buttons
     u32 pressed = HID_PAD;
 
-    if(((pressed & BUTTON_RIGHT) && loadPayload(PAYLOAD_PATH("right"))) ||
-       ((pressed & BUTTON_LEFT) && loadPayload(PAYLOAD_PATH("left"))) ||
-       ((pressed & BUTTON_UP) && loadPayload(PAYLOAD_PATH("up"))) ||
-       ((pressed & BUTTON_DOWN) && loadPayload(PAYLOAD_PATH("down"))) ||
-       ((pressed & BUTTON_X) && loadPayload(PAYLOAD_PATH("x"))) ||
-       ((pressed & BUTTON_Y) && loadPayload(PAYLOAD_PATH("y"))) ||
-       ((pressed & BUTTON_SELECT) && loadPayload(PAYLOAD_PATH("select"))) ||
-       ((pressed & BUTTON_R1) && loadPayload(PAYLOAD_PATH("r"))) ||
-       loadPayload(PAYLOAD_PATH("default")))
+    if(((pressed & BUTTON_RIGHT) && LOAD_PAYLOAD("right")) ||
+       ((pressed & BUTTON_LEFT) && LOAD_PAYLOAD("left")) ||
+       ((pressed & BUTTON_UP) && LOAD_PAYLOAD("up")) ||
+       ((pressed & BUTTON_DOWN) && LOAD_PAYLOAD("down")) ||
+       ((pressed & BUTTON_X) && LOAD_PAYLOAD("x")) ||
+       ((pressed & BUTTON_Y) && LOAD_PAYLOAD("y")) ||
+       ((pressed & BUTTON_R1) && LOAD_PAYLOAD("r")) ||
+       LOAD_PAYLOAD("def"))
         ((void (*)())PAYLOAD_ADDRESS)();
 }

source/fatfs/ffconf.h

@@ -34,7 +34,7 @@
 /  2: Enable with LF-CRLF conversion. */
 
 
-#define _USE_FIND		0
+#define _USE_FIND		1
 /* This option switches filtered directory read feature and related functions,
 /  f_findfirst() and f_findnext(). (0:Disable or 1:Enable) */
 

source/fs.c

@@ -64,16 +64,16 @@ u32 fileSize(const char *path)
     return size;
 }
 
-u32 fileExists(const char *path)
+u32 defPayloadExists(void)
 {
-    FIL fp;
-    u32 exists = 0;
+    DIR dir;
+    FILINFO info = { .lfname = NULL };
 
-    if(f_open(&fp, path, FA_READ) == FR_OK) exists = 1;
+    FRESULT result = f_findfirst(&dir, &info, "/aurei/payloads", "def_*.bin");
 
-    f_close(&fp);
+    f_closedir(&dir);
 
-    return exists;
+    return (result == FR_OK && info.fname[0]);
 }
 
 void firmRead(void *dest, const char *firmFolder)

source/fs.h

@@ -12,5 +12,5 @@ u32 mountFs(void);
 u32 fileRead(void *dest, const char *path, u32 size);
 u32 fileWrite(const void *buffer, const char *path, u32 size);
 u32 fileSize(const char *path);
-u32 fileExists(const char *path);
+u32 defPayloadExists(void);
 void firmRead(void *dest, const char *firmFolder);

source/loader.c

@@ -14,7 +14,7 @@
 
 void loadPayload(void)
 {
-    if(fileExists("aurei/payloads/default.bin"))
+    if(defPayloadExists())
     {
         initScreens();
         memcpy((void *)PAYLOAD_ADDRESS, loader, loader_size);