GameID functionality

Add GameID functionality for N64digital see networkfusion#38 and https://gitlab.com/pixelfx-public/n64-game-id

inc/rom.h

@@ -158,4 +158,5 @@ void swap_header(unsigned char* header, int loadlength);
 
 u8 getCicType(u8 bios_cic);
 
+void send_game_id(uint8_t* crc_hi, uint8_t* crc_lo, uint8_t media_format, uint8_t country_id);
 #endif

src/main.c

@@ -1403,9 +1403,20 @@ void loadrom(display_context_t disp, u8 *buff, int fast)
 
 
             //unique cart id for gametype
-            unsigned char cartID_str[12];
+            unsigned char cartID_str[64];
             sprintf(cartID_str, "ID: %c%c%c%c", headerdata[0x3B], headerdata[0x3C], headerdata[0x3D], headerdata[0x3E]);
             printText(cartID_str, 3, -1, disp);
+
+			//read and send game id for N64Digital (by ottelo)
+            sprintf(cartID_str, "GameID: %c%c%c%c%c%c%c%c%c%c", headerdata[0x10], headerdata[0x11], headerdata[0x12], headerdata[0x13], headerdata[0x14], headerdata[0x15], headerdata[0x16], headerdata[0x17], headerdata[0x3B], headerdata[0x3E]);
+            printText(cartID_str, 3, -1, disp);
+			send_game_id(
+				(uint8_t[]){ headerdata[0x10], headerdata[0x11], headerdata[0x12], headerdata[0x13], }, // CRC_HI
+				(uint8_t[]){ headerdata[0x14], headerdata[0x15], headerdata[0x16], headerdata[0x17], }, // CRC_LO
+				headerdata[0x3B],                                   // ROM type
+				headerdata[0x3E]                                    // Country code
+			);
+
         }
 
         int cic, save;

src/rom.c

@@ -9,6 +9,7 @@
 #include "sys.h"
 #include "rom.h"
 #include "cic.h"
+#include <libdragon.h>
 
 void pif_boot()
 {
@@ -77,3 +78,22 @@ u8 getCicType(u8 bios_cic) {
 
     return cic_chip;
 }
+
+//send game id for n64digital hdmi mod
+//source: https://gitlab.com/pixelfx-public/n64-game-id
+void send_game_id(uint8_t* crc_hi, uint8_t* crc_lo, uint8_t media_format, uint8_t country_id)
+{
+    #define N64_CONTROLLER_PORT 0
+    #define GAME_ID_COMMAND 0x1D
+
+    uint8_t out[10];
+    uint8_t dummy[1];
+
+    memcpy(out, crc_hi, 4);
+    memcpy(&out[4], crc_lo, 4);
+
+    out[8] = media_format;
+    out[9] = country_id;
+
+    execute_raw_command(N64_CONTROLLER_PORT, GAME_ID_COMMAND, sizeof(out), sizeof(dummy), out, dummy);
+}