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#ifndef _MAX32620FTHR_H_
#define _MAX32620FTHR_H_

#include "mbed.h"

/**
 * @brief MAX32620FTHR Board Support Library
 *
 * @details The MAX32620FTHR is a rapid development application board for
 * ultra low power wearable applications.  It includes common peripherals and
 * expansion connectors all power optimized for getting the longest life from
 * the battery.  This library configures the power and I/O for the board.
 * <br>https://www.maximintegrated.com/max32620fthr
 *
 * @code
 * #include "mbed.h"
 * #include "MAX32620FTHR.h"
 *
 * DigitalOut led1(LED1);
 *
 * // Initialize I/O voltages on MAX32620FTHR board
 * MAX32620FTHR fthr(MAX32620FTHR::VIO_3V3);
 *
 * // main() runs in its own thread in the OS
 * // (note the calls to Thread::wait below for delays)
 * int main()
 * {
 *     while (true) {
 *         led1 = !led1;
 *         Thread::wait(500);
 *     }
 * }
 * @endcode
 */
class MAX32620FTHR
{
public:
    // max32620fthr configuration utilities

    /**
      * @brief   IO Voltage
      * @details Enumerated options for operating voltage
      */
    typedef enum {
        VIO_1V8 = 0x00,    ///< 1.8V IO voltage at headers (from BUCK0)
        VIO_3V3 = 0x01,    ///< 3.3V IO voltage at headers (from BUCK2)
    } vio_t;

    /**
     * MAX32620FTHR constructor.
     */
    MAX32620FTHR();

    /**
     * MAX32620FTHR constructor.
     */
    MAX32620FTHR(vio_t vio);

    /**
     * MAX32620FTHR destructor.
     */
    ~MAX32620FTHR();

    /**
     * @brief   Initialize MAX32620FTHR board
     * @details Initializes I/O voltage on MAX32620FTHR board.
     *  Sets I/O voltage for LEDs to 3.3V and header pins to hdrVio specified.
     * @param hdrVio I/O voltage for header pins
     * @returns 0 if no errors, -1 if error.
    */
    int init(vio_t hdrVio);

    /**
     * @brief   Sets I/O Voltage
     * @details Sets the voltage rail to be used for a given pin.
     *  VIO_1V8 selects VDDIO which is supplied by Buck0, which is set at 1.8V,
     *  VIO_3V3 selects VDDIOH which is supplied by Buck2, which is typically 3.3V
     * @param   pin Pin whose voltage supply is being assigned.
     * @param   vio Voltage rail to be used for specified pin.
     * @returns 0 if no errors, -1 if error.
    */
    int vddioh(PinName pin, vio_t vio);
};

#endif /* _MAX32620FTHR_H_ */