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[nrf52]NFCでURIの代わりにAndroidアプリを立ち上げる

Posted at

nRF52のNFC URIサンプルをちょっと変更して、Androidアプリを起動させるようにしてみる。

アプリがインストールされていれば起動するし、なければGoogle Playの該当サイトに飛ぶ(勝手にインストールはされない)。

#if 0したところが既存で、#else側が書き換えたソースだ。
自分のアプリにするのは何かいやらしいので、Nordicの"nRF Master Control Panel"にした。

#if 0
    /* Create NFC message */
    nfc_uri_id_t id_www = NFC_URI_HTTP_WWW;         /* Choose protocol for the URL */

    err_code = nfc_uri_msg_create(id_www,
                                  (uint8_t *) url,
                                  sizeof(url),
                                  &p_nfc_msg,
                                  &nfc_msg_len);
    APP_ERROR_CHECK(err_code);
#else
    /* AAR */
    uint8_t ndef[256];
    uint8_t *p = ndef;
    const char PACKAGE_NAME[] = "no.nordicsemi.android.mcp";
    const char EXTERNAL_TYPE[] = "android.com:pkg";
    
    *p++ = 0xd4;     //MB=ME=1, TNF=External
    *p++ = 15;       //"android.com:pkg"
    *p++ = (uint8_t)(sizeof(PACKAGE_NAME) - 1);
    memcpy(p, EXTERNAL_TYPE, sizeof(EXTERNAL_TYPE) - 1);
    p += sizeof(EXTERNAL_TYPE) - 1;
    memcpy(p, PACKAGE_NAME, sizeof(PACKAGE_NAME) - 1);
    p += sizeof(PACKAGE_NAME) - 1;
    nfc_msg_len = (uint16_t)(p - ndef);
    p_nfc_msg = ndef;
#endif
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