owner-nrf52sdk/nRF5_SDK_15.2.0/components/nfc/t4t_lib/nfc_fixes.h

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#ifndef NFC_FIXES_H__
#define NFC_FIXES_H__

#include <stdint.h>
#include <stdbool.h>

#ifdef __cplusplus
extern "C" {
#endif

/** @file
 * @defgroup nfc_fixes NFC fixes and workarounds
 * @{
 * @ingroup nfc_t4t
 * @brief @tagAPI52 Fixes for hardware-related anomalies.
 *
 * If you are using the nRF52832 chip, 
 * you must define the macro HAL_NFC_ENGINEERING_BC_FTPAN_WORKAROUND to apply 
 * workarounds for the following anomalies:
 * - 79. NFCT: A false EVENTS_FIELDDETECTED event occurs after the field is lost.
 * - 116. NFCT does not release HFCLK when switching from ACTIVATED to SENSE mode.
 *
 * If you are using the IC revision Engineering A of the nRF52840 chip, 
 * you must define the macro HAL_NFC_NRF52840_ENGINEERING_ABC_WORKAROUND to apply 
 * workarounds for the following anomalies:
 * - 98. NFCT: The NFCT is not able to communicate with the peer.
 * - 116. NFCT does not release HFCLK when switching from ACTIVATED to SENSE mode.
 * - 144. NFCT: Not optimal NFC performance
 *
 * If you are using the IC revision 1, Engineering B, or Engineering C of the nRF52840 chip,
 * you must define the macro HAL_NFC_NRF52840_ENGINEERING_ABC_WORKAROUND to apply 
 * workarounds for the following anomalies:
 * - 190. NFCT: Event FIELDDETECTED may be generated too early.
 *
 * The use of implemented workarounds for the nRF52840 chip is determined at runtime and depends 
 * on the chip variant.
 *
 * The current code contains a patch for anomaly 25 (NFCT: Reset value of 
 * SENSRES register is incorrect), so that it now works on Windows Phone.
 */
 
#if defined (NRF52832_XXAA) || defined (NRF52832_XXAB) // assume the nRF52832 chip in IC revision Engineering B, Engineering C, 1, or 2.
    #define HAL_NFC_ENGINEERING_BC_FTPAN_WORKAROUND
#elif defined (NRF52840_XXAA)                          // assume the nRF52840 chip in IC revision Engineering A, Engineering B, Engineering C, or 1.
    #define HAL_NFC_NRF52840_ENGINEERING_ABC_WORKAROUND
#endif

/**
 * @brief Internal auxiliary function to check if the program is running on the NRF52840 chip
 * @retval true  It is the NRF52480 chip
 * @retval false It is other chip
 */
static inline bool type_52840_check(void)
{
    return ((((*(uint32_t *)0xF0000FE0) & 0xFF) == 0x08) &&
        (((*(uint32_t *)0xF0000FE4) & 0x0F) == 0x0));
}

/**
 * @brief Internal auxiliary function to check if the program is running on first sample of
 *        NRF52840 chip
 * @retval true  It is NRF52480 chip and it is first sample version
 * @retval false It is other chip
 */
static inline bool type_52840_sample_check(void)
{
    return ( type_52840_check() &&
               ( ((*(uint32_t *)0xF0000FE8) & 0xF0) == 0x00 ) &&
               ( ((*(uint32_t *)0xF0000FEC) & 0xF0) == 0x00 ) );
}

/**
 * @brief Internal auxiliary function to check if the program is running on final version of
 *        NRF52840 chip
 * @retval true  It is NRF52480 chip and it is final version
 * @retval false It is other chip
 */
static inline bool type_52840_final_check(void)
{
    return ( type_52840_check() &&
              ( ( ((*(uint32_t *)0xF0000FE8) & 0xF0) != 0x00 ) ||
                ( ((*(uint32_t *)0xF0000FEC) & 0xF0) != 0x00 ) ));
}

/** @} */

#ifdef __cplusplus
}
#endif

#endif /* NFC_FIXES_H__ */