无法使用PN7161发现NFC标签怎么处理？

开发者您好，
我们目前正在开发一种产品，我们目前正在将 STM32 控制器与 NXP 的 PN7161 NFC 读取器连接起来，以将数据写入/读取 ST25DV04KC 动态标签 (IS015693)。 我们参考了最新固件“ SW6705 ”中的示例代码“nfc_example_RW.c”作为开发我们固件的参考。

以下是我们用于 NFC 示例的 NFC 设置：
我刚刚将 NXP_TVDD_CONF 更改为1，因为 VDD 为 3.3V。



/***** NFC dedicated setting ****************************************/

/* Following definitions specifies which settings will apply when NxpNci_ConfigureSettings()
* API is called from the application
*/
#define NXP_CORE_CONF        1
#define NXP_CORE_STANDBY     1
#define NXP_CORE_CONF_EXTN   1
#define NXP_CLK_CONF         1 // 1=Xtal, 2=PLL
#define NXP_TVDD_CONF        1 // 1=3.3V, 2=4.75V
#define NXP_RF_CONF          1

uint8_t NxpNci_SettingCurrentTS[32] = __TIMESTAMP__;

#if NXP_CORE_CONF
/* NCI standard dedicated settings
* Refer to NFC Forum NCI standard for more details
*/
uint8_t NxpNci_CORE_CONF[]={0x20, 0x02, 0x05, 0x01,         /* CORE_SET_CONFIG_CMD */
    0x00, 0x02, 0xFE, 0x01                                  /* TOTAL_DURATION */
};
#endif

#if NXP_CORE_CONF_EXTN
/* NXP-NCI extension dedicated setting
* Refer to NFC controller User Manual for more details
*/
uint8_t NxpNci_CORE_CONF_EXTN[]={0x20, 0x02, 0x05, 0x01,    /* CORE_SET_CONFIG_CMD */
    0xA0, 0x40, 0x01, 0x00                                  /* TAG_DETECTOR_CFG */
};
#endif

#if NXP_CORE_STANDBY
/* NXP-NCI standby enable setting
* Refer to NFC controller User Manual for more details
*/
uint8_t NxpNci_CORE_STANDBY[]={0x2F, 0x00, 0x01, 0x00};    /* last byte indicates enable/disable */
#endif

#if NXP_CLK_CONF
/* NXP-NCI CLOCK configuration
* Refer to NFC controller Hardware Design Guide document for more details
*/
#if (NXP_CLK_CONF == 1)
/* Xtal configuration */
uint8_t NxpNci_CLK_CONF[]={0x20, 0x02, 0x05, 0x01,        /* CORE_SET_CONFIG_CMD */
   0xA0, 0x03, 0x01, 0x08                                  /* CLOCK_SEL_CFG */
};
#else
/* PLL configuration */
uint8_t NxpNci_CLK_CONF[]={0x20, 0x02, 0x09, 0x02,        /* CORE_SET_CONFIG_CMD */
   0xA0, 0x03, 0x01, 0x11,                                 /* CLOCK_SEL_CFG */
   0xA0, 0x04, 0x01, 0x01                                  /* CLOCK_TO_CFG */
};
#endif
#endif

#if NXP_TVDD_CONF
/* NXP-NCI TVDD configuration
* Refer to NFC controller Hardware Design Guide document for more details
*/
#if (NXP_TVDD_CONF == 1)
/* TXLDO output voltage set to 3.3V */
uint8_t NxpNci_TVDD_CONF[]={0x20, 0x02, 0x0F, 0x01, 0xA0, 0x0E, 0x0B, 0x11, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x10, 0x00, 0xD0, 0x0C};
#else
/* TXLDO output voltage set to 4.75V */
uint8_t NxpNci_TVDD_CONF[]={0x20, 0x02, 0x0F, 0x01, 0xA0, 0x0E, 0x0B, 0x11, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x40, 0x00, 0xD0, 0x0C};
#endif
#endif

#if NXP_RF_CONF
/* NXP-NCI RF configuration
* Refer to NFC controller Antenna Design and Tuning Guidelines document for more details
*/
/* Following configuration relates to performance optimization of OM27160 NFC Controller demo kit */
uint8_t NxpNci_RF_CONF[]={0x20, 0x02, 0x4C, 0x09,
  0xA0, 0x0D, 0x03, 0x78, 0x0D, 0x02,
  0xA0, 0x0D, 0x03, 0x78, 0x14, 0x02,
  0xA0, 0x0D, 0x06, 0x4C, 0x44, 0x65, 0x09, 0x00, 0x00,
  0xA0, 0x0D, 0x06, 0x4C, 0x2D, 0x05, 0x35, 0x1E, 0x01,
  0xA0, 0x0D, 0x06, 0x82, 0x4A, 0x55, 0x07, 0x00, 0x07,
  0xA0, 0x0D, 0x06, 0x44, 0x44, 0x03, 0x04, 0xC4, 0x00,
  0xA0, 0x0D, 0x06, 0x46, 0x30, 0x50, 0x00, 0x18, 0x00,
  0xA0, 0x0D, 0x06, 0x48, 0x30, 0x50, 0x00, 0x18, 0x00,
  0xA0, 0x0D, 0x06, 0x4A, 0x30, 0x50, 0x00, 0x08, 0x00
};
#endif





问题：
我能够成功连接到 NXPNci 设备，配置其设置、模式 (NXPNCI_MODE_RW)，还能够使用在轮询模式下选择为 TECH_PASSIVE_15693 的技术启动发现过程。
代码参考：


/* Discovery loop configuration according to the targeted modes of operation */
unsigned char DiscoveryTechnologies[] = {
    MODE_POLL | TECH_PASSIVE_15693,
};


    /* Open connection to NXPNCI device */
    if (NxpNci_Connect() == NFC_ERROR) {
        printf("Error: cannot connect to NXPNCI device\n");
        return;
    }

    if (NxpNci_ConfigureSettings() == NFC_ERROR) {
            printf("Error: cannot configure NXPNCI settings\n");
        return;
    }

    if (NxpNci_ConfigureMode(NXPNCI_MODE_RW) == NFC_ERROR)
    {
            printf("Error: cannot configure NXPNCI\n");
        return;
    }

    /* Start Discovery */
    if (NxpNci_StartDiscovery(DiscoveryTechnologies,sizeof(DiscoveryTechnologies)) != NFC_SUCCESS)
    {
            printf("Error: cannot start discovery\n");
        return;
    }


但是当我将 ST25DV04KC 标签带到阅读器 RF 场附近时，发现过程无法发现标签。我们也尝试过使用其他被动标签，但仍然无法获得任何发现通知。   

在NxpNci_WaitForDiscoveryNotification中，我们卡在了以下代码片段中，我们收到的响应是 0x61 0x23 0x00 ，但它要求第一个第二字节为0x03。


    do
    {
        if(NxpNci_WaitForReception(Answer, sizeof(Answer), &AnswerSize, TIMEOUT_INFINITE) == NXPNCI_ERROR) return NXPNCI_ERROR;
    }while ((Answer[0] != 0x61) || ((Answer[1] != 0x05) && (Answer[1] != 0x03)));


下面我给出了 NCI 调试日志以供参考：


[18:03:28:032] PN7160 interfacing code
[18:03:28:290] Scanning I2C bus:
[18:03:28:340] ---------------------------------------0x28-----------------------------------------------------------------------------------0x7C---
[18:03:30:659] NCI >> 20 00 01 01
[18:03:30:712] NCI << 40 00 01 00
[18:03:30:719] NCI << 60 00 09 02 01 20 04 04 71 12 50 05
[18:03:30:721] Firmware Version: 12.50.5
[18:03:30:734] NCI >> 20 01 02 00 00
[18:03:30:753] NCI << 40 01 1e 00 1a 7e 06 03 01 d0 02 ff ff 01 ff 00 08 00 00 01 00 02 00 03 00 80 00 82 00 83 ...
[18:03:31:814] NCI >> 2f 00 01 00
[18:03:31:827] NCI << 4f 00 01 00
[18:03:31:841] NCI >> 20 02 05 01 00 02 fe 01
[18:03:31:856] NCI << 40 02 02 00 00
[18:03:31:870] NCI >> 20 03 03 01 a0 14
[18:03:31:890] NCI << 40 03 25 00 01 a0 14 20 57 65 64 20 41 70 72 20 32 36 20 31 37 3a 31 35 3a 35 39 20 32 30 ...
[18:03:31:910] NCI >> 20 02 05 01 a0 40 01 00
[18:03:31:925] NCI << 40 02 02 00 00
[18:03:31:939] NCI >> 20 02 05 01 a0 03 01 08
[18:03:31:954] NCI << 40 02 02 00 00
[18:03:31:970] NCI >> 20 02 0f 01 a0 0e 0b 11 01 01 01 00 00 00 10 00 d0 0c
[18:03:31:987] NCI << 40 02 02 00 00
[18:03:32:009] NCI >> 20 02 4c 09 a0 0d 03 78 0d 02 a0 0d 03 78 14 02 a0 0d 06 4c 44 65 09 00 00 a0 0d 06 4c 2d ...
[18:03:32:030] NCI << 40 02 02 00 00
[18:03:32:052] NCI >> 20 02 24 01 a0 14 20 57 65 64 20 41 70 72 20 32 36 20 31 37 3a 31 35 3a 35 39 20 32 30 32 ...
[18:03:32:082] NCI << 40 02 02 00 00
[18:03:32:082] NCI >> 20 00 01 00
[18:03:32:105] NCI << 40 00 01 00
[18:03:32:105] NCI << 60 00 09 02 00 20 04 04 71 12 50 05
[18:03:32:114] NCI >> 20 01 02 00 00
[18:03:32:132] NCI << 40 01 1e 00 1a 7e 06 03 01 d0 02 ff ff 01 ff 00 08 00 00 01 00 02 00 03 00 80 00 82 00 83 ...
[18:03:33:282] NCI >> 2f 02 00
[18:03:33:295] NCI << 4f 02 05 00 00 01 aa dd
[18:03:33:312] NCI >> 21 00 10 05 01 01 01 02 01 01 03 01 01 04 01 02 80 01 80
[18:03:33:330] NCI << 41 00 01 00
[18:03:34:595] NCI >> 21 03 03 01 06 01
[18:03:34:609] NCI << 41 03 01 00
[18:03:36:797]
[18:03:36:808] WAITING FOR DEVICE DISCOVERY
[18:03:37:296] NCI << 61 23 00
[18:03:37:306] NCI << 61 23 00
[18:03:37:306] NCI << 61 23 00
[18:03:37:306] NCI << 61 23 00
[18:03:37:306] NCI << 61 23 00
[18:03:37:322] NCI << 61 23 00  


那么谁能帮我解决这个无法在 RW 模式下发现基于 ISO15693 的 NFC 标签的问题。