如何在nfc阅读器端从nfc标签读取邮箱消息？

大家好：
我想在 NFC 阅读器端从 nfc 标签读取邮箱消息。
但是我找不到如何阅读它的示例，我找到了一个 api rfalST25xVPollerReadMessage，但不知道如何使用它。任何人都可以分享吗？

2023-2-6 09:48:55

使用 rfalST25xVPollerPresentPassword 打开 RF 用户安全会话，pwdNum=0 (RF_PWD_0)，pwd=您的密码，pwdLen=8
授权启用 MB（由于 rfalST25xVPollerWriteConfiguration，将 MB_MODE 寄存器中的 MB_MODE 位设置为 1）
使用 rfalST25xVPollerReadDynamicConfiguration 读取 MB_CTRL_Dyn 寄存器的当前值
将 MB_EN 位设置为 1，并使用 rfalST25xVPollerWriteDynamicConfiguration 将更新后的值写入 MB_CTRL_Dyn 寄存器
用 rfalST25xVPollerReadMessageLength 或 rfalST25xVPollerFastReadMessageLength 读取邮箱消息的长度（双速）
使用 rfalST25xVPollerReadMessage 或 rfalST25xVPollerFastReadMessage 读取邮箱消息

#define ST25DV04K_SYSTEM_CONFIG_MB_MODE 0x0D
#define ST25DV04K_REG_MB_MODE_FTM_AUTHORIZED 1U
#define ST25DV04K_DYN_REG_MB_CTRL 0x0D
#define ST25DV04K_REG_MB_CTRL_DYN_MB_EN 1U
uint8_t pointer;
uint8_t reg;
static uint8_t pwd[8] = {0,0,0,0,0,0,0,0};
uint8_t pwdLen = 8;
uint8_t pwdNum = 0;
uint8_t msgLen;
ReturnCode err;
uint16_t rcvLen;
static uint8_t rxBuf[256];
/* Open RF configuration security session */
err = rfalST25xVPollerPresentPassword(RFAL_NFCV_REQ_FLAG_DEFAULT, uid, pwdNum, pwd, pwdLen);
/* set MB_MODE to 1: Enabling fast transfer mode is authorized.*/
pointer = ST25DV04K_SYSTEM_CONFIG_MB_MODE;
reg = ST25DV04K_REG_MB_MODE_FTM_AUTHORIZED;
err = rfalST25xVPollerWriteConfiguration(RFAL_NFCV_REQ_FLAG_DEFAULT, uid, pointer, reg);
/* set MB_EN to 1: Enable FTM. Read, update and write */
pointer = ST25DV04K_DYN_REG_MB_CTRL;
err = rfalST25xVPollerFastReadDynamicConfiguration(RFAL_NFCV_REQ_FLAG_DEFAULT, uid, pointer, ®);
reg |= ST25DV04K_REG_MB_CTRL_DYN_MB_EN;
err = rfalST25xVPollerFastWriteDynamicConfiguration(RFAL_NFCV_REQ_FLAG_DEFAULT, uid, pointer, reg);
/* Read Msg Len */
err = rfalST25xVPollerFastReadMessageLength(RFAL_NFCV_REQ_FLAG_DEFAULT, uid, &msgLen);
/* Read Msg */
err = rfalST25xVPollerReadMessage(RFAL_NFCV_REQ_FLAG_DEFAULT, uid, 0,0, rxBuf, sizeof(rxBuf), &rcvLen);

使用 rfalST25xVPollerPresentPassword 打开 RF 用户安全会话，pwdNum=0 (RF_PWD_0)，pwd=您的密码，pwdLen=8
授权启用 MB（由于 rfalST25xVPollerWriteConfiguration，将 MB_MODE 寄存器中的 MB_MODE 位设置为 1）
使用 rfalST25xVPollerReadDynamicConfiguration 读取 MB_CTRL_Dyn 寄存器的当前值
将 MB_EN 位设置为 1，并使用 rfalST25xVPollerWriteDynamicConfiguration 将更新后的值写入 MB_CTRL_Dyn 寄存器
用 rfalST25xVPollerReadMessageLength 或 rfalST25xVPollerFastReadMessageLength 读取邮箱消息的长度（双速）
使用 rfalST25xVPollerReadMessage 或 rfalST25xVPollerFastReadMessage 读取邮箱消息

#define ST25DV04K_SYSTEM_CONFIG_MB_MODE 0x0D
#define ST25DV04K_REG_MB_MODE_FTM_AUTHORIZED 1U
#define ST25DV04K_DYN_REG_MB_CTRL 0x0D
#define ST25DV04K_REG_MB_CTRL_DYN_MB_EN 1U
uint8_t pointer;
uint8_t reg;
static uint8_t pwd[8] = {0,0,0,0,0,0,0,0};
uint8_t pwdLen = 8;
uint8_t pwdNum = 0;
uint8_t msgLen;
ReturnCode err;
uint16_t rcvLen;
static uint8_t rxBuf[256];
/* Open RF configuration security session */
err = rfalST25xVPollerPresentPassword(RFAL_NFCV_REQ_FLAG_DEFAULT, uid, pwdNum, pwd, pwdLen);
/* set MB_MODE to 1: Enabling fast transfer mode is authorized.*/
pointer = ST25DV04K_SYSTEM_CONFIG_MB_MODE;
reg = ST25DV04K_REG_MB_MODE_FTM_AUTHORIZED;
err = rfalST25xVPollerWriteConfiguration(RFAL_NFCV_REQ_FLAG_DEFAULT, uid, pointer, reg);
/* set MB_EN to 1: Enable FTM. Read, update and write */
pointer = ST25DV04K_DYN_REG_MB_CTRL;
err = rfalST25xVPollerFastReadDynamicConfiguration(RFAL_NFCV_REQ_FLAG_DEFAULT, uid, pointer, ®);
reg |= ST25DV04K_REG_MB_CTRL_DYN_MB_EN;
err = rfalST25xVPollerFastWriteDynamicConfiguration(RFAL_NFCV_REQ_FLAG_DEFAULT, uid, pointer, reg);
/* Read Msg Len */
err = rfalST25xVPollerFastReadMessageLength(RFAL_NFCV_REQ_FLAG_DEFAULT, uid, &msgLen);
/* Read Msg */
err = rfalST25xVPollerReadMessage(RFAL_NFCV_REQ_FLAG_DEFAULT, uid, 0,0, rxBuf, sizeof(rxBuf), &rcvLen);

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