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xiaozhengsheng
126
components/nfc/platform/nfc_platform.c
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126
components/nfc/platform/nfc_platform.c
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/**
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* Copyright (c) 2018 - 2020, Nordic Semiconductor ASA
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form, except as embedded into a Nordic
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* Semiconductor ASA integrated circuit in a product or a software update for
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* such product, must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* 4. This software, with or without modification, must only be used with a
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* Nordic Semiconductor ASA integrated circuit.
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*
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* 5. Any software provided in binary form under this license must not be reverse
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* engineered, decompiled, modified and/or disassembled.
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*
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* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include "sdk_common.h"
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#if NRF_MODULE_ENABLED(NFC_PLATFORM)
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#include "nfc_platform.h"
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#include "nrf_drv_clock.h"
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#define NRF_LOG_MODULE_NAME nfc_platform
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#if NFC_PLATFORM_LOG_ENABLED
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#define NRF_LOG_LEVEL NFC_PLATFORM_LOG_LEVEL
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#define NRF_LOG_INFO_COLOR NFC_PLATFORM_INFO_COLOR
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#define NRF_LOG_DEBUG_COLOR NFC_PLATFORM_DEBUG_COLOR
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#include "nrf_log.h"
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NRF_LOG_MODULE_REGISTER();
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#else // NFC_PLATFORM_LOG_ENABLED
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#define NRF_LOG_LEVEL 0
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#include "nrf_log.h"
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#endif // NFC_PLATFORM_LOG_ENABLED
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/* Static data */
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static nrf_drv_clock_handler_item_t m_clock_handler_item; /**< Clock event handler item structure. */
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/**@brief Function for handling events from the Clock module.
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*
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* @param[in] event Clock event.
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*
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*/
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static inline void clock_event_handler(nrf_drv_clock_evt_type_t event)
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{
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switch(event)
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{
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case NRF_DRV_CLOCK_EVT_HFCLK_STARTED:
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/* Activate NFCT only when HFXO is running */
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nrfx_nfct_state_force(NRFX_NFCT_STATE_ACTIVATED);
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break;
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default:
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/* No implementation required */
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break;
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}
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}
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nrfx_err_t nfc_platform_setup(void)
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{
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nrfx_err_t err_code;
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/* Initialize the Clock module for handling high precision clock requests */
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m_clock_handler_item.event_handler = clock_event_handler;
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m_clock_handler_item.p_next = NULL;
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err_code = nrf_drv_clock_init();
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if (err_code == NRF_ERROR_MODULE_ALREADY_INITIALIZED)
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{
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err_code = NRFX_SUCCESS;
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}
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else if (err_code != NRF_SUCCESS)
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{
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return NRFX_ERROR_INTERNAL;
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}
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NRF_LOG_DEBUG("Utils init");
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return err_code;
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}
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void nfc_platform_event_handler(nrfx_nfct_evt_t const * p_event)
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{
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switch (p_event->evt_id)
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{
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case NRFX_NFCT_EVT_FIELD_DETECTED:
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NRF_LOG_DEBUG("Field detected");
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nrf_drv_clock_hfclk_request(&m_clock_handler_item);
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break;
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case NRFX_NFCT_EVT_FIELD_LOST:
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NRF_LOG_DEBUG("Field lost");
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nrf_drv_clock_hfclk_release();
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break;
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default:
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/* No implementation required */
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break;
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}
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}
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#endif // NRF_MODULE_ENABLED(NFC_PLATFORM)
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98
components/nfc/platform/nfc_platform.h
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98
components/nfc/platform/nfc_platform.h
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@@ -0,0 +1,98 @@
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/**
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* Copyright (c) 2018 - 2020, Nordic Semiconductor ASA
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form, except as embedded into a Nordic
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* Semiconductor ASA integrated circuit in a product or a software update for
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* such product, must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* 4. This software, with or without modification, must only be used with a
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* Nordic Semiconductor ASA integrated circuit.
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*
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* 5. Any software provided in binary form under this license must not be reverse
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* engineered, decompiled, modified and/or disassembled.
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*
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* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef NFC_PLATFORM_H__
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#define NFC_PLATFORM_H__
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/** @file
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*
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* @addtogroup nfc_api
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*
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* @defgroup nfc_platform Platform-specific module for NFC
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* @{
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* @ingroup nfc_api
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* @brief @tagAPI52 Platform-specific module for Near Field Communication Tag (NFCT).
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*
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* This module is used to set up platform-specific components that are required for NFC, and to
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* activate NFCT peripheral when all necessary conditions are fulfilled.
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*
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* @note Before the NFCT peripheral enters the ACTIVATED state, the HFXO must be running. To fulfill
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* this requirement, this module uses the clock management module.
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*
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*/
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#include "nrfx_nfct.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @brief Function for initializing platform-specific modules required by NFC.
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*
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* This function sets up clock managing interface and other platform specific components
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* that are required for NFC.
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*
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* @retval NRFX_SUCCESS If the NFC module is initialized successfully. If one
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* of the arguments is invalid, an error code is returned.
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*/
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nrfx_err_t nfc_platform_setup(void);
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/**
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* @brief Function for handling NFCT events that require platform-specific actions.
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*
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* This function is used by the NFC platform module to observe NFC events. This event flow is
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* necessary to track in order to determine when HFXO must be running and when the NFCT peripheral must
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* be activated.
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*
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* @param[in] p_event NFCT driver event.
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*/
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void nfc_platform_event_handler(nrfx_nfct_evt_t const * p_event);
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#ifdef __cplusplus
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}
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#endif
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/** @} */
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#endif /* NFC_PLATFORM_H__ */
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