mirror of https://github.com/ARMmbed/mbed-os.git
98 lines
2.8 KiB
C
98 lines
2.8 KiB
C
/*
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* Copyright (c) 2013-2018, ARM Limited, All Rights Reserved
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* \file pn512_hw.h
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* \copyright Copyright (c) ARM Ltd 2013
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* \author Donatien Garnier
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*/
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#ifndef PN512_HW_H_
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#define PN512_HW_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "inc/nfc.h"
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#include "pn512.h"
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//Utility for transport: SPI address read/write
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#define PN512_SPI_ADDR_R(x) ((1<<7) | ((x) << 1))
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#define PN512_SPI_ADDR_W(x) ((0<<7) | ((x) << 1))
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void pn512_hw_init(pn512_t* pPN512);
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/** \internal Write bytes at the specified address on the underlying transport link
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* \param pPN512 pointer to pn512_t structure
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* \param addr address at which to write
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* \param buf buffer to write
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* \param len length of buffer
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*/
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static inline void pn512_hw_write(pn512_t* pPN512, uint8_t addr, uint8_t* buf, size_t len)
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{
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nfc_transport_write(((nfc_transceiver_t*)pPN512)->pTransport, addr, buf, len);
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}
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/** \internal Read bytes from the specified address on the underlying transport link
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* \param pPN512 pointer to pn512_t structure
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* \param addr address from which to read
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* \param buf buffer to read
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* \param len length of buffer
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*/
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static inline void pn512_hw_read(pn512_t* pPN512, uint8_t addr, uint8_t* buf, size_t len)
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{
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nfc_transport_read(((nfc_transceiver_t*)pPN512)->pTransport, addr, buf, len);
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}
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static inline void pn512_hw_write_buffer(pn512_t* pPN512, uint8_t addr, buffer_t* pData, size_t len)
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{
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while( len > 0 )
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{
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if( buffer_reader_readable(pData) == 0 )
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{
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return;
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}
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size_t cpyLen = MIN(len, buffer_reader_current_buffer_length(pData));
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nfc_transport_write(((nfc_transceiver_t*)pPN512)->pTransport, addr, buffer_reader_current_buffer_pointer(pData), cpyLen);
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buffer_read_n_skip(pData, cpyLen);
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len -= cpyLen;
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}
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}
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static inline void pn512_hw_read_buffer(pn512_t* pPN512, uint8_t addr, buffer_builder_t* pData, size_t len)
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{
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while( len > 0 )
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{
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if( buffer_builder_writeable(pData) == 0 )
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{
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return;
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}
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//Read payload
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size_t cpyLen = MIN(len, buffer_builder_space(pData));
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nfc_transport_read(((nfc_transceiver_t*)pPN512)->pTransport, addr, buffer_builder_write_position(pData), cpyLen);
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buffer_builder_write_n_skip(pData, cpyLen);
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len -= cpyLen;
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}
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* PN512_HW_H_ */
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