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nfc: Update example #104

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Jul 4, 2023
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nfc: Update example #104

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83 changes: 69 additions & 14 deletions nfc/source/main.c
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Original file line number Diff line number Diff line change
Expand Up @@ -33,7 +33,7 @@ void print_hex(void *buf, size_t size) {
consoleUpdate(NULL);
}

Result process_amiibo(u32 app_id) {
Result process_amiibo() {
Result rc = 0;

// Get the handle of the first controller with NFC capabilities.
Expand Down Expand Up @@ -94,15 +94,34 @@ Result process_amiibo(u32 app_id) {
rc = eventWaitLoop(&activate_event);

if (R_SUCCEEDED(rc)) {
printf("A tag was detected, please do not remove it from the NFC spot.\n");
printf("A tag was detected, please do not remove it from the NFC spot.\n\n");
consoleUpdate(NULL);
}
}

// Retrieve the tag info data, which contains the protocol, type and uuid.
if (R_SUCCEEDED(rc)) {
NfpTagInfo tag_info = {0};
rc = nfpGetTagInfo(&handle, &tag_info);

if (R_SUCCEEDED(rc)) {
printf("Tag protocol: 0x%02x, type: 0x%02x, UUID: ", tag_info.protocol, tag_info.tag_type);
print_hex(tag_info.uuid, tag_info.uuid_length);
printf("\n");
}
}

// If a tag was successfully detected, load it into memory.
if (R_SUCCEEDED(rc))
if (R_SUCCEEDED(rc)) {
rc = nfpMount(&handle, NfpDeviceType_Amiibo, NfpMountTarget_All);

if (rc == 0x11073) // 2115-0136
printf("This tag is corrupted and has a backup in system.\n");

if (rc == 0x12073) // 2115-0144
printf("This tag is corrupted.\n");
}

// Retrieve the model info data, which contains the amiibo id.
if (R_SUCCEEDED(rc)) {
NfpModelInfo model_info = {0};
Expand All @@ -111,6 +130,7 @@ Result process_amiibo(u32 app_id) {
if (R_SUCCEEDED(rc)) {
printf("Amiibo ID: ");
print_hex(model_info.amiibo_id, 8);
printf("\n");
}
}

Expand All @@ -120,8 +140,43 @@ Result process_amiibo(u32 app_id) {
NfpCommonInfo common_info = {0};
rc = nfpGetCommonInfo(&handle, &common_info);

if (R_SUCCEEDED(rc))
if (R_SUCCEEDED(rc)) {
app_area_size = common_info.application_area_size;
printf("Write counter: %d, last write date %d/%d/%d\n\n", common_info.write_counter, common_info.last_write_day, common_info.last_write_month, common_info.last_write_year);
}
}

u32 app_id=0;
// Retrieve the admin info data, which contains the app id.
if (R_SUCCEEDED(rc)) {
NfpAdminInfo admin_info = {0};
rc = nfpGetAdminInfo(&handle, &admin_info);

if (R_SUCCEEDED(rc)) {
app_id = admin_info.application_area_id;
printf("App area: 0x%x, game ID: 0x%lx, console: ", app_id, admin_info.application_id);
switch (admin_info.application_area_version) {
case NfpApplicationAreaVersion_3DS:
printf("Old 3ds");
break;
case NfpApplicationAreaVersion_WiiU:
printf("Wii U");
break;
case NfpApplicationAreaVersion_3DSv2:
printf("New 3ds");
break;
case NfpApplicationAreaVersion_Switch:
printf("Switch");
break;
case NfpApplicationAreaVersion_NotSet:
printf("Not set");
break;
default:
printf("0x%x", admin_info.application_area_version);
break;
}
printf("\n");
}
}

if (R_SUCCEEDED(rc)) {
Expand All @@ -134,13 +189,15 @@ Result process_amiibo(u32 app_id) {
}

u8 app_area[0xd8] = {0}; // Maximum size of the application area.
u32 app_area_read_size = 0; // Actual number of bytes set by nfpGetApplicationArea.
if (app_area_size > sizeof(app_area)) app_area_size = sizeof(app_area);
if (R_SUCCEEDED(rc)) {
rc = nfpGetApplicationArea(&handle, app_area, app_area_size);
rc = nfpGetApplicationArea(&handle, app_area, app_area_size, &app_area_read_size);

if (R_SUCCEEDED(rc)) {
printf("App area:\n");
print_hex(app_area, app_area_size);
printf("App data:\n");
print_hex(app_area, app_area_read_size);
printf("\n");
}
}

Expand Down Expand Up @@ -171,11 +228,7 @@ Result process_amiibo(u32 app_id) {
int main(int argc, char* argv[])
{
Result rc = 0;

// Hardcoded for Super Smash Bros. Ultimate.
// See also: https://switchbrew.org/wiki/NFC_services#Application_IDs
u32 app_id = 0x34f80200;


// This example uses a text console, as a simple way to output text to the screen.
// If you want to write a software-rendered graphics application,
// take a look at the graphics/simplegfx example, which uses the libnx Framebuffer API instead.
Expand All @@ -194,7 +247,9 @@ int main(int argc, char* argv[])
consoleUpdate(NULL);

// Initialize the nfp:* service.
rc = nfpInitialize(NfpServiceType_User);
// Use the NfpServiceType as required by your app, only use Debug if actually needed.
// This example uses nfpGetAdminInfo which is only available on the debug interface.
rc = nfpInitialize(NfpServiceType_Debug);
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// Check if NFC is enabled. If not, wait until it is.
// Note that various official games don't use nfc*().
Expand Down Expand Up @@ -237,7 +292,7 @@ int main(int argc, char* argv[])
// padGetButtonsDown returns the set of buttons that have been
// newly pressed in this frame compared to the previous one
if (padGetButtonsDown(&pad) & HidNpadButton_A) {
rc = process_amiibo(app_id);
rc = process_amiibo();

// If an error happened, print it.
if (R_FAILED(rc))
Expand Down