[中秋活动]使用STM32L552驱动25R3916C操作NFC

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奇迹发布时间：2021-9-20 00:43

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文章简介:	移植25R3916C例程到STM32L552

题目说是操作，其实主要是移植。该芯片支持iic与spi两种操作方式，对于现在我使用的NFC06A1扩展板来说，默认即为spi模式，本文将记录下移植时需要注意的点.
1.原理图
QQ截图20210920002529.png

扩展板引脚标注与实际板卡的引脚是不同的，这里需要根据实际修改一下。

2.spi配置
QQ截图20210920002701.png

上图是本次移植中，笔者使用的配置，亲测可行

3.外部中断配置

/**
* @brief This function handles EXTI line3 interrupt.
*/
void EXTI3_IRQHandler(void)
{
/* USER CODE BEGIN EXTI3_IRQn 0 */
/* USER CODE END EXTI3_IRQn 0 */
HAL_GPIO_EXTI_IRQHandler(GPIO_PIN_3);
/* USER CODE BEGIN EXTI3_IRQn 1 */
st25r3916Isr();
/* USER CODE END EXTI3_IRQn 1 */
}

复制代码

需要在外部中断中加入st25r3916Isr();处理。注意：该函数操作了接口的读写，如果使用spi中断或者iic中断接受需要注意。建议使用操作系统的时候使用通知进行操作。

4.代码配置
基本所有的配置都集中在platform.h文件里面。下面代码是关于NFC支持相关功能的开关。

#define RFAL_FEATURE_LISTEN_MODE true /*!< Enable/Disable RFAL support for Listen Mode */
#define RFAL_FEATURE_WAKEUP_MODE true /*!< Enable/Disable RFAL support for the Wake-Up mode */
#define RFAL_FEATURE_NFCA true /*!< Enable/Disable RFAL support for NFC-A (ISO14443A) */
#define RFAL_FEATURE_NFCB true /*!< Enable/Disable RFAL support for NFC-B (ISO14443B) */
#define RFAL_FEATURE_NFCF true /*!< Enable/Disable RFAL support for NFC-F (FeliCa) */
#define RFAL_FEATURE_NFCV true /*!< Enable/Disable RFAL support for NFC-V (ISO15693) */
#define RFAL_FEATURE_T1T true /*!< Enable/Disable RFAL support for T1T (Topaz) */
#define RFAL_FEATURE_T2T true /*!< Enable/Disable RFAL support for T2T (Mifare) */
#define RFAL_FEATURE_T4T true /*!< Enable/Disable RFAL support for T4T */
#define RFAL_FEATURE_ST25TB true /*!< Enable/Disable RFAL support for ST25TB */
#define RFAL_FEATURE_ST25xV true /*!< Enable/Disable RFAL support for ST25TV/ST25DV */
#define RFAL_FEATURE_DYNAMIC_ANALOG_CONFIG false /*!< Enable/Disable Analog Configs to be dynamically updated (RAM) */
#define RFAL_FEATURE_DPO false /*!< Enable/Disable RFAL dynamic power support */
#define RFAL_FEATURE_ISO_DEP true /*!< Enable/Disable RFAL support for ISO-DEP (ISO14443-4) */
#define RFAL_FEATURE_ISO_DEP_POLL true /*!< Enable/Disable RFAL support for Poller mode (PCD) ISO-DEP (ISO14443-4) */
#define RFAL_FEATURE_ISO_DEP_LISTEN true /*!< Enable/Disable RFAL support for Listen mode (PICC) ISO-DEP (ISO14443-4) */
#define RFAL_FEATURE_NFC_DEP true /*!< Enable/Disable RFAL support for NFC-DEP (NFCIP1/P2P) */
#define RFAL_FEATURE_ISO_DEP_IBLOCK_MAX_LEN 256U /*!< ISO-DEP I-Block max length. Please use values as defined by rfalIsoDepFSx */
#define RFAL_FEATURE_NFC_DEP_BLOCK_MAX_LEN 254U /*!< NFC-DEP Block/Payload length. Allowed values: 64, 128, 192, 254 */
#define RFAL_FEATURE_NFC_RF_BUF_LEN 258U /*!< RF buffer length used by RFAL NFC layer */
#define RFAL_FEATURE_ISO_DEP_APDU_MAX_LEN 512U /*!< ISO-DEP APDU max length. Please use multiples of I-Block max length */
#define RFAL_FEATURE_NFC_DEP_PDU_MAX_LEN 512U /*!< NFC-DEP PDU max length. */