File content as of revision 592:a274ee790e56:

#ifndef SERCOM_H_INCLUDED
#define SERCOM_H_INCLUDED

#include <compiler.h>
#include <system.h>
#include <clock.h>
#include <system_interrupt.h>
#include "sercom_pinout.h"

#ifdef __cplusplus
extern "C" {
#endif

#if (SAMD10) || (SAMD11)

#if (SERCOM0_GCLK_ID_SLOW == SERCOM1_GCLK_ID_SLOW && \
     SERCOM0_GCLK_ID_SLOW == SERCOM2_GCLK_ID_SLOW)
#  define SERCOM_GCLK_ID SERCOM0_GCLK_ID_SLOW
#else
#  error "SERCOM modules must share the same slow GCLK channel ID."
#endif

#else

#if (SERCOM0_GCLK_ID_SLOW == SERCOM1_GCLK_ID_SLOW && \
     SERCOM0_GCLK_ID_SLOW == SERCOM2_GCLK_ID_SLOW && \
     SERCOM0_GCLK_ID_SLOW == SERCOM3_GCLK_ID_SLOW)
#  define SERCOM_GCLK_ID SERCOM0_GCLK_ID_SLOW
#else
#  error "SERCOM modules must share the same slow GCLK channel ID."
#endif

#endif

#if (0x1ff >= REV_SERCOM)
#  define FEATURE_SERCOM_SYNCBUSY_SCHEME_VERSION_1
#elif (0x2ff >= REV_SERCOM)
#  define FEATURE_SERCOM_SYNCBUSY_SCHEME_VERSION_2
#else
#  error "Unknown SYNCBUSY scheme for this SERCOM revision"
#endif

/**
 * \brief sercom asynchronous operation mode
 *
 * Select sercom asynchronous operation mode
 */
enum sercom_asynchronous_operation_mode {
    SERCOM_ASYNC_OPERATION_MODE_ARITHMETIC = 0,
    SERCOM_ASYNC_OPERATION_MODE_FRACTIONAL,
};

/**
 * \brief sercom asynchronous samples per bit
 *
 * Select number of samples per bit
 */
enum sercom_asynchronous_sample_num {
    SERCOM_ASYNC_SAMPLE_NUM_3 = 3,
    SERCOM_ASYNC_SAMPLE_NUM_8 = 8,
    SERCOM_ASYNC_SAMPLE_NUM_16 = 16,
};

enum status_code sercom_set_gclk_generator(
    const enum gclk_generator generator_source,
    const bool force_change);

enum status_code _sercom_get_sync_baud_val(
    const uint32_t baudrate,
    const uint32_t external_clock,
    uint16_t *const baudval);

enum status_code _sercom_get_async_baud_val(
    const uint32_t baudrate,
    const uint32_t peripheral_clock,
    uint16_t *const baudval,
    enum sercom_asynchronous_operation_mode mode,
    enum sercom_asynchronous_sample_num sample_num);

uint32_t _sercom_get_default_pad(
    Sercom *const sercom_module,
    const uint8_t pad);

uint8_t _sercom_get_sercom_inst_index(
    Sercom *const sercom_instance);
#ifdef __cplusplus
}
#endif

#endif //__SERCOM_H_INCLUDED