NEC Near Field Communication RF module library

File content as of revision 0:337524afec9b:

/**
 * NEC Near Field Communication RF module library for mbed
 * Copyright (c) 2012 Suga
 * Released under the MIT License: http://mbed.org/license/mit
 */

/** @file
 * @brief NEC Near Field Communication RF module library for mbed
 * @note H001-000003-001 (950MHz), TY24FM-E2024 (2.4GHz)
 */

#include "mbed.h"

enum NECTYPE {
    NECTYPE_950MHz,
    NECTYPE_2400MHz,
};

enum NECMSG {
    NECMSG_ACK           = 0x00,
    NECMSG_NOACK         = 0x01,
    NECMSG_SEARCH        = 0x10,
    NECMSG_SEND_DAT      = 0x11,
    NECMSG_RESEND        = 0x12,
    NECMSG_SEND_NOACK    = 0x13,
    NECMSG_ENERGY_DETECT = 0x16,
    NECMSG_SEND_CMD      = 0x17,
    NECMSG_WRITE_RFCONF  = 0x21,
    NECMSG_READ_RSSI     = 0x24,
    NECMSG_READ_CONFIG   = 0x29,
    NECMSG_WRITE_CONFIG  = 0x2A,
    NECMSG_READ_DEFAULT  = 0x7D,
    NECMSG_WRITE_DEFAULT = 0x7E,
    NECMSG_RESET         = 0x77,
};

enum NECPWR {
    NECPWR_LOW           = 0x00,
    NECPWR_MID           = 0x01,
    NECPWR_HIGH          = 0x02,
};

enum NECBAUD {
    NECBAUD_9600           = 0x02,
    NECBAUD_50k            = 0x06,
    NECBAUD_100k           = 0x07,
};

enum NECUART {
    UART_4800           = 0x01,
    UART_9600           = 0x02,
    UART_19200          = 0x04,
    UART_38400          = 0x05,
    UART_56700          = 0x06,
    UART_115200         = 0x08,
};

struct ifMessage {
    uint16_t start;
    uint8_t  length;
    uint8_t  msgid;
    uint8_t  msgno;
    uint32_t dstid;
    uint32_t srcid;
    uint8_t  parameter[242];
} __attribute__((packed));


/**
 * NECnfc class
 */
class NECnfc {
public:
    /**
     * Default constructor
     */
    NECnfc (PinName p_tx, PinName p_rx, PinName p_reset);

    /**
     * configuration
     */
    int begin (int ch, NECBAUD baud, NECUART uart = UART_115200, NECPWR power = NECPWR_LOW, NECTYPE type = NECTYPE_950MHz);
    /**
     * send
     */
    int send (int msgid, unsigned long dest, char *param, int len);
    /**
     * read
     */
    int read (struct ifMessage *ifmsg, int timeout = 5000);
    /**
     * read data ready
     */
    int readable ();
    
protected:
    void isr_rx ();
    
private:
    Serial rf;
    DigitalOut reset;
    int msgno;
    struct ifMessage rxmsg;
    char *rxbuf;
    int rxlen, rxmode;
    volatile int rxflg;

};