/**
 * \file
 * \brief ATCA Hardware abstraction layer for SAMD21 I2C over START drivers.
 *
 * Prerequisite: add SERCOM I2C Master Polled support to application in Atmel Studio
 *
 * \copyright (c) 2015-2020 Microchip Technology Inc. and its subsidiaries.
 *
 * \page License
 *
 * Subject to your compliance with these terms, you may use Microchip software
 * and any derivatives exclusively with Microchip products. It is your
 * responsibility to comply with third party license terms applicable to your
 * use of third party software (including open source software) that may
 * accompany Microchip software.
 *
 * THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES, WHETHER
 * EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE, INCLUDING ANY IMPLIED
 * WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY, AND FITNESS FOR A
 * PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE LIABLE FOR ANY INDIRECT,
 * SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL LOSS, DAMAGE, COST OR EXPENSE
 * OF ANY KIND WHATSOEVER RELATED TO THE SOFTWARE, HOWEVER CAUSED, EVEN IF
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 */

#ifndef HAL_SAMD21_I2C_START_H_
#define HAL_SAMD21_I2C_START_H_

#include "atmel_start.h"
#include <stdlib.h>

/** \defgroup hal_ Hardware abstraction layer (hal_)
 *
 * \brief
 * These methods define the hardware abstraction layer for communicating with a CryptoAuth device
 *
   @{ */


#define MAX_I2C_BUSES    6   // SAMD21 has up to 6 SERCOMS that can be configured as I2C

/** \brief this is the hal_data for ATCA HAL for Atmel START SERCOM
 */
typedef struct atcaI2Cmaster
{
    struct i2c_m_sync_desc i2c_master_instance;
    uint32_t               sercom_core_freq;
    int                    ref_ct;
    // for conveniences during interface release phase
    int bus_index;
} ATCAI2CMaster_t;

void change_i2c_speed(ATCAIface iface, uint32_t speed);

/** @} */

#endif /* HAL_SAMD21_I2C_START_H_ */
