AMiRo-OS

/*

AMiRo-LLD is a compilation of low-level hardware drivers for the Autonomous Mini Robot (AMiRo) platform.

Copyright (C) 2016..2019  Thomas Schöpping et al.

This program is free software: you can redistribute it and/or modify

it under the terms of the GNU Lesser General Public License as published by

the Free Software Foundation, either version 3 of the License, or

(at your option) any later version.

This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License

along with this program.  If not, see <http://www.gnu.org/licenses/>.

*/

/**

 * @file    alld_AT24C01B.c

 * @brief   EEPROM function implementations.

 *

 * @addtogroup lld_eeprom

 * @{

 */

#include <alld_AT24C01B.h>

#include <string.h>

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/* LOCAL DEFINITIONS                                                          */

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/* EXPORTED VARIABLES                                                         */

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/* LOCAL TYPES                                                                */

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/* LOCAL VARIABLES                                                            */

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/* LOCAL FUNCTIONS                                                            */

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/* EXPORTED FUNCTIONS                                                         */

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/**

 * @brief Acknowledgement polling to check if a write operation finished.

 * @param[in]   at24c01b  The eeprom driver to use.

 * @param[in]   timeout   Timeout for the function to return (in microseconds)

 *

 * @return  The return status indicates whether the function call was succesfull or a timeout occurred.

 */

apalExitStatus_t at24c01b_lld_poll_ack(const AT24C01BDriver* const at24c01b, const apalTime_t timeout)

{

  apalDbgAssert(at24c01b != NULL);

  uint8_t tmp = 0;

  return apalI2CMasterReceive(at24c01b->i2cd, (AT24C01B_LLD_I2C_ADDR_FIXED | at24c01b->addr), &tmp, 1, timeout);

}

/**

 * @brief Read the data from the eeprom starting at the current address.

 * @param[in]   at24c01b  The eeprom driver to use.

 * @param[out]  data      The data read from the AT24C01B.

 * @param[in]   num       The amount of bytes to read.

 * @param[in]   timeout   Timeout for the function to return (in microseconds)

 *

 * @return  The return status indicates whether the function call was succesfull or a timeout occurred.

 */

apalExitStatus_t at24c01b_lld_read_current_address(const AT24C01BDriver* const at24c01b, uint8_t* const data, const uint8_t num, const apalTime_t timeout)

{

  apalDbgAssert(at24c01b != NULL);

  apalDbgAssert(data != NULL);

  return apalI2CMasterReceive(at24c01b->i2cd, (AT24C01B_LLD_I2C_ADDR_FIXED | at24c01b->addr), data, num, timeout);

}

/**

 * @brief Read the data from the eeprom starting at a given address.

 * @param[in]   at24c01b  The eeprom driver to use.

 * @param[in]   addr      The address to read.

 * @param[out]  data      The data read from the AT24C01B.

 * @param[in]   num       The amount of bytes to read.

 * @param[in]   timeout   Timeout for the function to return (in microseconds)

 *

 * @return  The return status indicates whether the function call was succesfull or a timeout occurred.

 */

apalExitStatus_t at24c01b_lld_read(const AT24C01BDriver* const at24c01b, const uint8_t addr, uint8_t* const data, const uint8_t num, const apalTime_t timeout)

{

  apalDbgAssert(at24c01b != NULL);

  apalDbgAssert(data != NULL);

  apalDbgAssert(addr + num <= AT24C01B_LLD_SIZE_BYTES);

  apalExitStatus_t status = apalI2CMasterTransmit(at24c01b->i2cd, (AT24C01B_LLD_I2C_ADDR_FIXED | at24c01b->addr), &addr, 1, NULL, 0, timeout);

  if (status == APAL_STATUS_OK || status == APAL_STATUS_WARNING) {

    return apalI2CMasterReceive(at24c01b->i2cd, (AT24C01B_LLD_I2C_ADDR_FIXED | at24c01b->addr), data, num, timeout);

  } else {

    return status;

  }

}

/**

 * @brief Write a byte to the eeprom.

 * @param[in]   at24c01b  The eeprom driver to use.

 * @param[in]   addr      The address to start writing.

 * @param[out]  data      The data to be written to the AT24C01BN.

 * @param[in]   timeout   Timeout for the function to return (in microseconds)

 *

 * @return  The return status indicates whether the function call was succesfull or a timeout occurred.

 */

apalExitStatus_t at24c01b_lld_write_byte(const AT24C01BDriver* const at24c01b, const uint8_t addr, const uint8_t data, const apalTime_t timeout)

{

  apalDbgAssert(at24c01b != NULL);

  const uint8_t writedata[2] = {addr, data};

  return apalI2CMasterTransmit(at24c01b->i2cd, (AT24C01B_LLD_I2C_ADDR_FIXED | at24c01b->addr), writedata, 2, NULL, 0, timeout);

}

/**

 * @brief Write a page to the eeprom.

 * @param[in]   at24c01b  The eeprom driver to use.

 * @param[in]   addr      The address to start writing.

 * @param[in]   data      The data to be written to the AT24C01BN.

 * @param[in]   num       The amount of bytes to write.

 * @param[in]   timeout   Timeout for the function to return (in microseconds)

 *

 * @return  The return status indicates whether the function call was succesfull or a timeout occurred.

 */

apalExitStatus_t at24c01b_lld_write_page(const AT24C01BDriver* const at24c01b, const uint8_t addr, const uint8_t* const data, const uint8_t num, const apalTime_t timeout)

{

  apalDbgAssert(at24c01b != NULL);

  apalDbgAssert(data != NULL);

  uint8_t writedata[num+1];

  writedata[0] = addr;

  memcpy(&writedata[1], data, num);

  return apalI2CMasterTransmit(at24c01b->i2cd, (AT24C01B_LLD_I2C_ADDR_FIXED | at24c01b->addr), writedata, num+1, NULL, 0, timeout);

}

/** @} */