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87 lines
2.4 KiB
87 lines
2.4 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 SPILAYERDRIVER_H_
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#define SPILAYERDRIVER_H_
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#include <fcntl.h>
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#include <linux/spi/spidev.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <sys/ioctl.h>
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#include <unistd.h>
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#include "SpiLayerInterface.h"
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#define ATP_FILE_PATH "/data/vendor/ese/atp.bin"
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#define MODE_TX 0
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#define MODE_RX 1
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#define MIN_TIME_BETWEEN_MODE_SWITCH 1
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#define ST54J_SE_MAGIC 0xE5
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#define ST54J_SE_PULSE_RESET _IOR(ST54J_SE_MAGIC, 0x01, unsigned int)
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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 SpiLayerDriver_init(SpiDriver_config_t* tSpiDriver);
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/**
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* Open the spi device driver.
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*
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* @return -1 if an error occurred, file descriptor if success.
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*/
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int SpiLayerDriver_open(char *spiDevPath);
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/**
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* Close the spi device driver.
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*
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*/
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void SpiLayerDriver_close();
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/**
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* Reads bytesToRead bytes from the SPI interface.
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*
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* @param rxBuffer The buffer where the received bytes are stored.
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* @param bytesToRead The expected number of bytes to be read.
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*
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* @return The amount of bytes read from the slave, -1 if something failed.
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*/
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int SpiLayerDriver_read(uint8_t *rxBuffer, unsigned int bytesToRead);
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/**
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* Write txBufferLength bytes to the SPI interface.
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*
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* @param txBuffer The buffer where the bytes to write are placed.
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* @param txBufferLength The number of bytes to be written.
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*
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* @return The amount of bytes written to the slave, -1 if something failed.
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*/
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int SpiLayerDriver_write(uint8_t *writeBuffer, unsigned int bytesToWrite);
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/**
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* Send a Reset pulse to the eSE.
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*
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* @return 0 if success, -1 if something failed.
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*/
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int SpiLayerDriver_reset();
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#endif /* SPILAYERDRIVER_H_ */
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