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gc_n64_usb-v3
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Code Issues Releases Wiki Activity

Improved memory pack detection

This commit is contained in:
Raphael Assenat 2015-11-07 01:35:24 -05:00
parent a67b5fc3c6
commit b49e0e38e4
1 changed files with 75 additions and 12 deletions
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87
tool/mempak_gcn64usb.c
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@ -6,6 +6,7 @@
#include "gcn64.h"
#include "mempak.h"
#include "mempak_gcn64usb.h"
#include "hexdump.h"
#include "../gcn64_protocol.h"
#include "../requests.h"
@ -128,30 +129,92 @@ int gcn64lib_mempak_readBlock(gcn64_hdl_t hdl, unsigned short addr, unsigned cha
int gcn64lib_mempak_detect(gcn64_hdl_t hdl)
{
unsigned char buf[0x20];
unsigned char buf[40];
int res;
unsigned short addr = __calc_address_crc(0x8000);
int first_read, second_read;
printf("Init 1\n");
buf[0] = N64_GET_CAPABILITIES;
res = gcn64lib_rawSiCommand(hdl, 0, buf, 1, buf, sizeof(buf));
if (res < 0) {
return -1;
}
if (res != 3) {
return -1;
}
if (!(buf[2] & 0x01)) {
printf("No accessory connected\n");
return -1;
}
/* first write 32 0xFEs */
memset(buf, 0xfe, 32);
res = gcn64lib_n64_expansionWrite(hdl, 0x8000, buf);
if (res != 0xe1) {
printf("res: %d\n", res);
res = gcn64lib_n64_expansionWrite(hdl, addr, buf, 32);
if (res < 0) {
return -1;
}
if (res != 0xE1) {
return -1;
}
/* Read back (normally zeros) */
res = gcn64lib_n64_expansionRead(hdl, addr, buf, sizeof(buf));
if (res < 0) {
return -1;
}
first_read = buf[0];
/* Now write 32 0x80s */
memset(buf, 0x80, 32);
res = gcn64lib_n64_expansionWrite(hdl, addr, buf, 32);
if (res < 0) {
return -1;
}
/* Normally, read back (0x00 on memory card, 0x80 on rumble pak)
*
* But this simple detection method (from libdragon) does not detect one of my
* memory cards (it looks like a rumble pack).
*
* But I found out that the values that are read back are just always equal to while
* for other hardware, reading after writing the 0xfe values always seem to return 0x00.
*/
res = gcn64lib_n64_expansionRead(hdl, addr, buf, sizeof(buf));
if (res < 0) {
printf("failed to detect mempak: %d\n", res);
return -1;
}
second_read = buf[0];
// Values seen here are
//
// - Official Nintendo rumble pack: 0x00
// - Yobo rumble pack: 0x00
// - Yobo mempak: 0x00
// - Unknown "super memory card 1000": 0xFE
//
if (first_read == 0xfe) {
printf("super memory card 1000 probably detected\n");
return 0;
}
printf("Init 2\n");
memset(buf, 0x80, 32);
res = gcn64lib_n64_expansionWrite(hdl, 0x8000, buf);
if (res != 0xe1) {
printf("res: %d\n", res);
// Values seen here are
//
// - Official Nintendo rumble pack: 0x80
// - Yobo rumble pack: 0x80
// - Yobo mempak: 0x00
// - Unknown "super memory card 1000": 0x80 (but this card is catched above)
if (second_read == 0x80) {
return -1; // rumble
} else {
return 0;
}
return -1;
}
int gcn64lib_mempak_writeBlock(gcn64_hdl_t hdl, unsigned short addr, unsigned char data[32])
{
return gcn64lib_n64_expansionWrite(hdl, __calc_address_crc(addr), data);
return gcn64lib_n64_expansionWrite(hdl, __calc_address_crc(addr), data, 32);
}
/**