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88 lines
2.5 KiB
88 lines
2.5 KiB
/******************************************************************************
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*
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* Copyright (C) 2018 ST Microelectronics S.A.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may 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,
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* WITHOUT 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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******************************************************************************/
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#ifndef SPILAYERCOMM_H_
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#define SPILAYERCOMM_H_
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#include "SpiLayerInterface.h"
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#include "utils-lib/Tpdu.h"
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#define NAD_HOST_TO_SLAVE 0x21
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#define NAD_SLAVE_TO_HOST 0x12
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#define BWT_THRESHOlD 0xFFFF
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#define DEFAULT_PWT 50
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// Global variables
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/**
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* Initialize internal variables.
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*
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* @return null
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*/
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void SpiLayerComm_init(SpiDriver_config_t* tSpiDriver);
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/**
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* Starts the polling mechanism to read the length of the ATP.
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*
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* @returns 0 if everything is ok, -1 otherwise.
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*/
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int SpiLayerComm_waitForAtpLength();
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/**
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* Reads the ATP and stores it in the ATP parameter.
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*
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* @returns 0 if everything is ok, -1 otherwise.
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*/
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int SpiLayerComm_readAtp();
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/**
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* Writes the specified TPDU to the SPI interface.
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*
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* @param cmdTpdu The TPDU to be written.
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*
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* @return The number of bytes written if everything went well, -1 if an error
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* occurred.
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*/
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int SpiLayerComm_writeTpdu(Tpdu* cmdTpdu);
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/**
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* Waits for a TPDU response to be available on the SPI interface.
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*
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* @param respTpdu The buffer where to store the TDPU.
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* @param nBwt The maximum number of BWT to wait for the response.
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*
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* @return 0 if the response is available and the header could be read, -2
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* if no response received before the timeout, -1 otherwise.
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*/
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int SpiLayerComm_waitForResponse(Tpdu* respTpdu, int nBwt);
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/**
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* Reads the pending bytes of the response (data information and crc fields).
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* Assumes respTpdu epilogue is initialized.
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*
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* @param respTpdu The buffer where to store the response. Should have the
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* epilogue initialized.
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*
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* @return 0 if everything went well, -1 otherwise.
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*/
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int SpiLayerComm_readTpdu(Tpdu* respTpdu);
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void SpiLayerComm_readAtpFromFile();
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#endif /* SPILAYERCOMM_H_ */
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