utils.h

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/**
 * \file    heivs/utils.h
 * \brief   Various utilities
 * \author  marc dot pignat at hevs dot ch
 * \defgroup utils Utilities
 * \ingroup libheivs_stm32
 * @{
 ***************************************************************************/
#ifndef HEIVS_UTILS_H
#define HEIVS_UTILS_H

#include "heivs/config.h"

/**
 * \brief Number of elements in the array
 *
 * \param x the array
 */
#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))

/**
 * \brief Maximum between a and b
 *
 * \param a
 * \param b
 */
#ifdef __GNUC__
#define max(a,b) \
    ({ __typeof__ (a) _a = (a); \
       __typeof__ (b) _b = (b); \
       _a > _b ? _a : _b; })
#else
#define max(a,b) (a>b?a:b)
#endif
/**
 * \brief Minimum between a and b
 *
 * \param a
 * \param b
 */
#ifdef __GNUC__
#define min(a,b) \
    ({ __typeof__ (a) _a = (a); \
       __typeof__ (b) _b = (b); \
       _a < _b ? _a : _b; })
#else
#define max(a,b) (a>b?a:b)
#endif

#ifdef __cplusplus
    extern "C"
    {
#endif

#ifdef __cplusplus
    }
#endif

#include "stm32/stm32f4xx.h"

/**
 * \brief Detect is debugger is connected
 *
 * Our debug script enable debugging while in WFI (wait for interrupt), so we
 * can detect if the debugger is connected by reading this flag.
 */
#define debugger_is_connected() (DBGMCU->CR & DBGMCU_CR_DBG_SLEEP)

/**
 * \brief Breakpoint (from code)
 *
 * This breakpoint can't be disabled.
 */
#define breakpoint() asm volatile("bkpt")

/**
 * @}
 */
#endif /* HEIVS_UTILS_H */