amiro-lld / drivers / AT24C01B / v1 / alld_AT24C01B.c @ e7af07e7
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/*
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AMiRo-LLD is a compilation of low-level hardware drivers for the Autonomous Mini Robot (AMiRo) platform.
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Copyright (C) 2016..2019 Thomas Schöpping et al.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file alld_AT24C01B.c
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* @brief EEPROM function implementations.
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*
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* @addtogroup lld_eeprom
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* @{
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*/
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#include <alld_AT24C01B.h> |
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#include <string.h> |
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/******************************************************************************/
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/* LOCAL DEFINITIONS */
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/******************************************************************************/
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/******************************************************************************/
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/* EXPORTED VARIABLES */
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/******************************************************************************/
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/******************************************************************************/
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/* LOCAL TYPES */
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/******************************************************************************/
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/******************************************************************************/
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/* LOCAL VARIABLES */
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/******************************************************************************/
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/******************************************************************************/
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/* LOCAL FUNCTIONS */
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/******************************************************************************/
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/******************************************************************************/
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/* EXPORTED FUNCTIONS */
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/******************************************************************************/
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/**
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* @brief Acknowledgement polling to check if a write operation finished.
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* @param[in] at24c01b The eeprom driver to use.
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* @param[in] timeout Timeout for the function to return (in microseconds)
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*
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* @return The return status indicates whether the function call was succesfull or a timeout occurred.
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*/
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apalExitStatus_t at24c01b_lld_poll_ack(const AT24C01BDriver* const at24c01b, const apalTime_t timeout) |
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{
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apalDbgAssert(at24c01b != NULL);
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uint8_t tmp = 0;
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return apalI2CMasterReceive(at24c01b->i2cd, (AT24C01B_LLD_I2C_ADDR_FIXED | at24c01b->addr), &tmp, 1, timeout); |
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} |
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/**
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* @brief Read the data from the eeprom starting at the current address.
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* @param[in] at24c01b The eeprom driver to use.
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* @param[out] data The data read from the AT24C01B.
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* @param[in] num The amount of bytes to read.
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* @param[in] timeout Timeout for the function to return (in microseconds)
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*
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* @return The return status indicates whether the function call was succesfull or a timeout occurred.
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*/
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apalExitStatus_t at24c01b_lld_read_current_address(const AT24C01BDriver* const at24c01b, uint8_t* const data, const uint8_t num, const apalTime_t timeout) |
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{
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apalDbgAssert(at24c01b != NULL);
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apalDbgAssert(data != NULL);
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return apalI2CMasterReceive(at24c01b->i2cd, (AT24C01B_LLD_I2C_ADDR_FIXED | at24c01b->addr), data, num, timeout);
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} |
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/**
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* @brief Read the data from the eeprom starting at a given address.
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* @param[in] at24c01b The eeprom driver to use.
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* @param[in] addr The address to read.
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* @param[out] data The data read from the AT24C01B.
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* @param[in] num The amount of bytes to read.
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* @param[in] timeout Timeout for the function to return (in microseconds)
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*
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* @return The return status indicates whether the function call was succesfull or a timeout occurred.
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*/
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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) |
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{
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apalDbgAssert(at24c01b != NULL);
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apalDbgAssert(data != NULL);
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apalDbgAssert(addr + num <= AT24C01B_LLD_SIZE_BYTES); |
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apalExitStatus_t status = apalI2CMasterTransmit(at24c01b->i2cd, (AT24C01B_LLD_I2C_ADDR_FIXED | at24c01b->addr), &addr, 1, NULL, 0, timeout); |
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if (status == APAL_STATUS_OK || status == APAL_STATUS_WARNING) {
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return apalI2CMasterReceive(at24c01b->i2cd, (AT24C01B_LLD_I2C_ADDR_FIXED | at24c01b->addr), data, num, timeout);
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} else {
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return status;
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} |
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} |
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/**
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* @brief Write a byte to the eeprom.
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* @param[in] at24c01b The eeprom driver to use.
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* @param[in] addr The address to start writing.
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* @param[out] data The data to be written to the AT24C01BN.
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* @param[in] timeout Timeout for the function to return (in microseconds)
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*
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* @return The return status indicates whether the function call was succesfull or a timeout occurred.
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*/
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apalExitStatus_t at24c01b_lld_write_byte(const AT24C01BDriver* const at24c01b, const uint8_t addr, const uint8_t data, const apalTime_t timeout) |
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{
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apalDbgAssert(at24c01b != NULL);
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const uint8_t writedata[2] = {addr, data}; |
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return apalI2CMasterTransmit(at24c01b->i2cd, (AT24C01B_LLD_I2C_ADDR_FIXED | at24c01b->addr), writedata, 2, NULL, 0, timeout); |
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} |
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/**
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* @brief Write a page to the eeprom.
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* @param[in] at24c01b The eeprom driver to use.
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* @param[in] addr The address to start writing.
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* @param[in] data The data to be written to the AT24C01BN.
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* @param[in] num The amount of bytes to write.
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* @param[in] timeout Timeout for the function to return (in microseconds)
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*
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* @return The return status indicates whether the function call was succesfull or a timeout occurred.
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*/
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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) |
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{
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apalDbgAssert(at24c01b != NULL);
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apalDbgAssert(data != NULL);
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uint8_t writedata[num+1];
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writedata[0] = addr;
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memcpy(&writedata[1], data, num);
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return apalI2CMasterTransmit(at24c01b->i2cd, (AT24C01B_LLD_I2C_ADDR_FIXED | at24c01b->addr), writedata, num+1, NULL, 0, timeout); |
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} |
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/** @} */
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