amiro-lld / drivers / HMC5883L / v1 / alld_HMC5883L.c @ ed9a1bf5
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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..2020 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_HMC5883L.c
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* @brief Compass function implementations.
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*
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* @addtogroup lld_compass
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* @{
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*/
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#include <alld_HMC5883L.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 Reads the registers starting from idetification register A.
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* @param[in] hmcd The HMC5883L driver to use.
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* @param[out] rxbuffer The data read from the identification registers.
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* @param[in] num Number of registers 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 successfull or a timeout occured.
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*/
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apalExitStatus_t hmc5883l_lld_check(const HMC5883LDriver* const hmcd, uint8_t* const rxbuffer, const uint8_t num, const apalTime_t timeout) |
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{
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apalDbgAssert(hmcd != NULL && hmcd->i2cd != NULL); |
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apalDbgAssert(rxbuffer != NULL);
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uint8_t txbuffer = HMC5883L_LLD_REGISTER_IDENTIFICATION_A; |
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return apalI2CMasterTransmit(hmcd->i2cd,HMC5883L_LLD_I2C_ADDR,&txbuffer,1,rxbuffer,num,timeout); |
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} |
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/**
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* @brief Write data to consecutive registers.
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* @param[in] hmcd The HMC5883L driver to use.
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* @param[in] regaddr Address of first register.
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* @param[in] data Bytes to write to the registers.
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* @param[in] num Number of registers 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 successfull or a timeout occured.
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*/
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apalExitStatus_t hmc5883l_lld_write_register(const HMC5883LDriver* const hmcd, const hmc5883l_lld_register_t regaddr, const uint8_t* const data, const uint8_t num, const apalTime_t timeout) |
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{
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apalDbgAssert(hmcd != NULL && hmcd->i2cd != NULL); |
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apalDbgAssert(data != NULL);
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uint8_t buffer[num+1];
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buffer[0] = regaddr;
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memcpy(buffer+1, data, num);
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return apalI2CMasterTransmit(hmcd->i2cd,HMC5883L_LLD_I2C_ADDR,buffer,num+1,NULL,0,timeout); |
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} |
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/**
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* @brief Write data to one registers.
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* @param[in] hmcd The HMC5883L driver to use.
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* @param[in] regaddr Address of the register.
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* @param[in] data Data to write ti the register.
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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 successfull or a timeout occured.
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*/
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apalExitStatus_t hmc5883l_lld_set_register(const HMC5883LDriver* const hmcd, const hmc5883l_lld_register_t regaddr, const uint8_t data, const apalTime_t timeout) |
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{
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apalDbgAssert(hmcd != NULL && hmcd->i2cd != NULL); |
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uint8_t buffer[2];
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buffer[0] = regaddr;
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buffer[1] = data;
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return apalI2CMasterTransmit(hmcd->i2cd,HMC5883L_LLD_I2C_ADDR,buffer,2,NULL,0,timeout); |
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} |
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/**
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* @brief Read data from consecutive registers.
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* @param[in] hmcd The HMC5883L driver to use.
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* @param[in] regaddr Address of first register.
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* @param[out] data Bytes to read from the registers.
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* @param[in] num Number of registers 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 successfull or a timeout occured.
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*/
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apalExitStatus_t hmc5883l_lld_read_register(const HMC5883LDriver* const hmcd, const hmc5883l_lld_register_t regaddr, uint8_t* const data, const uint8_t num, const apalTime_t timeout) |
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{
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apalDbgAssert(hmcd != NULL && hmcd->i2cd != NULL); |
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apalDbgAssert(data != NULL);
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return apalI2CMasterTransmit(hmcd->i2cd,HMC5883L_LLD_I2C_ADDR,(uint8_t*)®addr,1,data,num,timeout); |
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} |
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/**
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* @brief Read sensor data.
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* @param[in] hmcd The HMC5883L driver to use.
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* @param[out] data Sensor data.
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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 successfull or a timeout occured.
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*/
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apalExitStatus_t hmc5883l_lld_read_data(const HMC5883LDriver* const hmcd, uint16_t* const data, const apalTime_t timeout) |
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{
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apalDbgAssert(data != NULL);
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uint8_t buffer[6];
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apalExitStatus_t status = hmc5883l_lld_read_register(hmcd, HMC5883L_LLD_REGISTER_DATA_OUT_X_MSB, buffer, 6, timeout);
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data[0] = ((uint16_t)buffer[0] << 8) | buffer[1]; |
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data[1] = ((uint16_t)buffer[2] << 8) | buffer[3]; |
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data[2] = ((uint16_t)buffer[4] << 8) | buffer[5]; |
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for (uint8_t dataIdx = 0; dataIdx < 3; dataIdx++) { |
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if (data[dataIdx] >> 15) { |
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data[dataIdx] = -1 * ~(data[dataIdx] - 1); |
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} |
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} |
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return status;
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} |
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/**
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* @brief Read the status register.
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* @param[in] hmcd The HMC5883L driver to use.
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* @param[out] status Content of status register,
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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 successfull or a timeout occured.
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*/
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apalExitStatus_t hmc5883l_lld_read_status(const HMC5883LDriver* const hmcd, uint8_t* const status, const apalTime_t timeout) |
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{
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apalDbgAssert(status != NULL);
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return hmc5883l_lld_read_register(hmcd, HMC5883L_LLD_REGISTER_STATUS, status, 1, timeout); |
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} |
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/**
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* @brief Read the configuration of the hmc5883l.
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* @param[in] hmcd The HMC5883L driver to use.
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* @param[out] cfg Structure representing the current configuration.
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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 successfull or a timeout occured.
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*/
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apalExitStatus_t hmc5883l_lld_read_config(const HMC5883LDriver* const hmcd, hmc5883l_lld_config_t* const cfg, const apalTime_t timeout) |
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{
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apalDbgAssert(cfg != NULL);
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uint8_t conf[3];
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apalExitStatus_t status = hmc5883l_lld_read_register(hmcd, HMC5883L_LLD_REGISTER_CONFIG_A, conf, 3, timeout);
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cfg->avg = conf[0] & (3 << 5); |
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cfg->outrate = conf[0] & (7 << 2); |
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cfg->mbias = conf[0] & 3; |
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cfg->gain = conf[1] & (7 << 5); |
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cfg->highspeed = conf[2] >> 7; |
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cfg->mode = conf[2] & 3; |
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return status;
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} |
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/**
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* @brief Write a configuration to the hmc5883l.
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* @param[in] hmcd The HMC5883L driver to use.
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* @param[in] cfg Structure representing the new configuration.
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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 successfull or a timeout occured.
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*/
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apalExitStatus_t hmc5883l_lld_write_config(const HMC5883LDriver* const hmcd, const hmc5883l_lld_config_t cfg, const apalTime_t timeout) |
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{
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uint8_t conf[3];
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conf[0] = cfg.avg | cfg.outrate | cfg.mbias;
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conf[1] = cfg.gain;
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conf[2] = (cfg.highspeed << 7) | cfg.mode; |
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return hmc5883l_lld_write_register(hmcd, HMC5883L_LLD_REGISTER_CONFIG_A, conf, 3, timeout); |
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} |
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/**
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* @brief Read the lock bit of the status register.
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* @param[in] hmcd The HMC5883L driver to use.
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* @param[in] lock Status of the lock bit.
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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 successfull or a timeout occured.
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*/
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apalExitStatus_t hmc5883l_lld_read_lock(const HMC5883LDriver* const hmcd, uint8_t* const lock, const apalTime_t timeout) |
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{
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apalDbgAssert(lock != NULL);
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apalExitStatus_t status = hmc5883l_lld_read_register(hmcd, HMC5883L_LLD_REGISTER_STATUS, lock, 1, timeout);
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*lock >>= 1;
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return status;
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} |
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/**
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* @brief Read the rdy bit of the status register.
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* @param[in] hmcd The HMC5883L driver to use.
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* @param[in] rdy Status of the rdy bit.
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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 successfull or a timeout occured.
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*/
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apalExitStatus_t hmc5883l_lld_read_rdy(const HMC5883LDriver* const hmcd, uint8_t* const rdy, const apalTime_t timeout) |
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{
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apalDbgAssert(rdy != NULL);
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apalExitStatus_t status = hmc5883l_lld_read_register(hmcd, HMC5883L_LLD_REGISTER_STATUS, rdy, 1, timeout);
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*rdy &= 1;
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return status;
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} |
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/** @} */
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