hmtrp.hpp

/*
 * Author: Jon Trulson <jtrulson@ics.com>
 * Copyright (c) 2015 Intel Corporation.
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
#pragma once

#include <string>
#include <iostream>

#include <stdint.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
#include <termios.h>
#include <sys/time.h>
#include <sys/select.h>
#include <sys/types.h>
#include <sys/stat.h>

#include <mraa/uart.h>

#define HMTRP_DEFAULT_UART 0

namespace upm {
  class HMTRP {
  public:

    // HMTRP opcodes
    typedef enum { RESET               = 0xf0,
                   GET_CONFIG          = 0xe1,
                   SET_FREQUENCY       = 0xd2,
                   SET_RF_DATARATE     = 0xc3, // 1200-115200 (baud)
                   SET_RX_BW           = 0xb4, // 30-620 (Khz)
                   SET_FREQ_MODULATION = 0xa5, // 10-160 (KHz)
                   SET_TX_POWER        = 0x96, // 0-7
                   SET_UART_SPEED      = 0x1e, // recommended not to change
                   GET_RF_SIGNAL_STR   = 0xa7,
                   GET_MOD_SIGNAL_STR  = 0x78
    } HMTRP_OPCODE_T;
    
    HMTRP(int uart=HMTRP_DEFAULT_UART);

    ~HMTRP();

    bool dataAvailable(unsigned int millis=0);

    int readData(char *buffer, int len, int millis=-1);

    int writeData(char *buffer, int len);

    bool setupTty(speed_t baud=B9600);

    bool checkOK();
    
    bool reset();

    bool getConfig(uint32_t *freq, uint32_t *dataRate, uint16_t *rxBandwidth,
                   uint8_t *modulation, uint8_t *txPower, uint32_t *uartBaud);

    bool setFrequency(uint32_t freq);

    bool setRFDataRate(uint32_t rate);

    bool setRXBandwidth(uint16_t rxBand);

    bool setFrequencyModulation(uint8_t modulation);

    bool setTransmitPower(uint8_t power);

    bool setUARTSpeed(uint32_t speed);

    bool getRFSignalStrength(uint8_t *strength);

    uint8_t getRFSignalStrength();

    bool getModSignalStrength(uint8_t *strength);

    uint8_t getModSignalStrength();


  private:
    mraa_uart_context m_uart;
    int m_ttyFd;
  };
}