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782 lines
24 KiB
C
782 lines
24 KiB
C
4 years ago
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/*
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ChibiOS - Copyright (C) 2016..2019 Rocco Marco Guglielmi
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This file is part of ChibiOS.
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ChibiOS is free software; you can redistribute it and/or modify
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it under the terms of the GNU 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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ChibiOS 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 General Public License for more details.
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You should have received a copy of the GNU 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 hts221.c
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* @brief HTS221 MEMS interface module code.
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*
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* @addtogroup HTS221
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* @ingroup EX_ST
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* @{
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*/
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#include "hal.h"
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#include "hts221.h"
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/*===========================================================================*/
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/* Driver local definitions. */
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/*===========================================================================*/
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#define HTS221_SEL(mask, offset) (int16_t)(mask << offset)
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#define HTS221_FLAG_HYGRO_BIAS 0x01
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#define HTS221_FLAG_HYGRO_SENS 0x02
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#define HTS221_FLAG_THERMO_BIAS 0x04
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#define HTS221_FLAG_THERMO_SENS 0x08
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/*===========================================================================*/
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/* Driver exported variables. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver local variables and types. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver local functions. */
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/*===========================================================================*/
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#if (HTS221_USE_I2C) || defined(__DOXYGEN__)
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/**
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* @brief Reads registers value using I2C.
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* @pre The I2C interface must be initialized and the driver started.
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*
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* @param[in] i2cp pointer to the I2C interface
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* @param[in] reg first sub-register address
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* @param[out] rxbuf pointer to an output buffer
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* @param[in] n number of consecutive register to read
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* @return the operation status.
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*
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* @notapi
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*/
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static msg_t hts221I2CReadRegister(I2CDriver *i2cp, uint8_t reg, uint8_t* rxbuf,
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size_t n) {
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uint8_t txbuf = reg;
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if (n > 1)
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txbuf |= HTS221_SUB_MS;
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return i2cMasterTransmitTimeout(i2cp, HTS221_SAD, &txbuf, 1, rxbuf, n,
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TIME_INFINITE);
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}
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/**
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* @brief Writes a value into a register using I2C.
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* @pre The I2C interface must be initialized and the driver started.
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*
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* @param[in] i2cp pointer to the I2C interface
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* @param[in] txbuf buffer containing sub-address value in first position
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* and values to write
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* @param[in] n size of txbuf less one (not considering the first
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* element)
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* @return the operation status.
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*
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* @notapi
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*/
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static msg_t hts221I2CWriteRegister(I2CDriver *i2cp, uint8_t* txbuf, size_t n) {
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if (n > 1)
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(*txbuf) |= HTS221_SUB_MS;
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return i2cMasterTransmitTimeout(i2cp, HTS221_SAD, txbuf, n + 1, NULL, 0,
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TIME_INFINITE);
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}
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#endif /* HTS221_USE_I2C */
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/**
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* @brief Computes biases and sensitivities starting from data stored in
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* calibration registers.
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* @note Factory bias and sensitivity values are stored into the driver
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* structure.
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*
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* @param[in] devp pointer to the HTS221 interface
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* @return the operation status.
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*
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* @notapi
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*/
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static msg_t hts221Calibrate(HTS221Driver *devp) {
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msg_t msg;
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uint8_t calib[16], H0_rH_x2, H1_rH_x2, msb;
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int16_t H0_T0_OUT, H1_T0_OUT, T0_degC_x8, T1_degC_x8, T0_OUT, T1_OUT;
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/* Retrieving rH values from Calibration registers */
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msg = hts221I2CReadRegister(devp->config->i2cp,
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HTS221_AD_CALIB_0, calib, 16);
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H0_rH_x2 = calib[0];
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H1_rH_x2 = calib[1];
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H0_T0_OUT = calib[6];
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H0_T0_OUT += calib[7] << 8;
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H1_T0_OUT = calib[10];
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H1_T0_OUT += calib[11] << 8;
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T0_degC_x8 = calib[2];
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/* Completing T0_degC_x8 value */
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msb = (calib[5] & HTS221_SEL(0x03, 0));
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if (msb & HTS221_SEL(0x01, 1)) {
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msb |= HTS221_SEL(0x3F, 2);
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}
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T0_degC_x8 += msb << 8;
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T1_degC_x8 = calib[3];
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/* Completing T1_degC_x8 value */
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msb = ((calib[5] & HTS221_SEL(0x03, 2)) >> 2);
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if (msb & HTS221_SEL(0x01, 1)) {
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msb |= HTS221_SEL(0x3F, 2);
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}
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T1_degC_x8 += msb << 8;
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T0_OUT = calib[12];
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T0_OUT += calib[13] << 8;
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T1_OUT = calib[14];
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T1_OUT += calib[15] << 8;
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devp->hygrofactorysensitivity = ((float)H1_rH_x2 - (float)H0_rH_x2) /
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(((float)H1_T0_OUT - (float)H0_T0_OUT) * 2.0f);
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devp->hygrofactorybias = (devp->hygrofactorysensitivity * (float)H0_T0_OUT) -
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((float)H0_rH_x2 / 2.0f);
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devp->thermofactorysensitivity = ((float)T1_degC_x8 - (float)T0_degC_x8) /
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(((float)T1_OUT - (float)T0_OUT) * 8.0f);
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devp->thermofactorybias = (devp->thermofactorysensitivity * (float)T0_OUT) -
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((float)T0_degC_x8 / 8.0f);
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return msg;
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}
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/**
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* @brief Return the number of axes of the BaseHygrometer.
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*
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* @param[in] ip pointer to @p BaseHygrometer interface.
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*
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* @return the number of axes.
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*/
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static size_t hygro_get_axes_number(void *ip) {
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(void)ip;
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return HTS221_HYGRO_NUMBER_OF_AXES;
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}
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/**
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* @brief Retrieves raw data from the BaseHygrometer.
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* @note This data is retrieved from MEMS register without any algebraical
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* manipulation.
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* @note The axes array must be at least the same size of the
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* BaseHygrometer axes number.
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*
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* @param[in] ip pointer to @p BaseHygrometer interface.
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* @param[out] axes a buffer which would be filled with raw data.
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*
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* @return The operation status.
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* @retval MSG_OK if the function succeeded.
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* @retval MSG_RESET if one or more I2C errors occurred, the errors can
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* be retrieved using @p i2cGetErrors().
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* @retval MSG_TIMEOUT if a timeout occurred before operation end.
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*/
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static msg_t hygro_read_raw(void *ip, int32_t axes[]) {
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HTS221Driver* devp;
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uint8_t buff[2];
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int16_t tmp;
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msg_t msg;
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osalDbgCheck((ip != NULL) && (axes != NULL));
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/* Getting parent instance pointer.*/
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devp = objGetInstance(HTS221Driver*, (BaseHygrometer*)ip);
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osalDbgAssert((devp->state == HTS221_READY),
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"hygro_read_raw(), invalid state");
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osalDbgAssert((devp->config->i2cp->state == I2C_READY),
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"hygro_read_raw(), channel not ready");
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#if HTS221_SHARED_I2C
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i2cAcquireBus(devp->config->i2cp);
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i2cStart(devp->config->i2cp,
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devp->config->i2ccfg);
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#endif /* HTS221_SHARED_I2C */
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msg = hts221I2CReadRegister(devp->config->i2cp, HTS221_AD_HUMIDITY_OUT_L,
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buff, 2);
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#if HTS221_SHARED_I2C
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i2cReleaseBus(devp->config->i2cp);
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#endif /* HTS221_SHARED_I2C */
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if (msg == MSG_OK) {
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tmp = buff[0] + (buff[1] << 8);
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*axes = (int32_t)tmp;
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}
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return msg;
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}
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/**
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* @brief Retrieves cooked data from the BaseHygrometer.
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* @note This data is manipulated according to the formula
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* cooked = (raw * sensitivity) - bias.
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* @note Final data is expressed as %rH.
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* @note The axes array must be at least the same size of the
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* BaseHygrometer axes number.
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*
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* @param[in] ip pointer to @p BaseHygrometer interface.
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* @param[out] axes a buffer which would be filled with cooked data.
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*
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* @return The operation status.
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* @retval MSG_OK if the function succeeded.
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* @retval MSG_RESET if one or more I2C errors occurred, the errors can
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* be retrieved using @p i2cGetErrors().
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* @retval MSG_TIMEOUT if a timeout occurred before operation end.
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*/
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static msg_t hygro_read_cooked(void *ip, float axes[]) {
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HTS221Driver* devp;
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int32_t raw;
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msg_t msg;
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osalDbgCheck((ip != NULL) && (axes != NULL));
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/* Getting parent instance pointer.*/
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devp = objGetInstance(HTS221Driver*, (BaseHygrometer*)ip);
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osalDbgAssert((devp->state == HTS221_READY),
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"hygro_read_cooked(), invalid state");
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msg = hygro_read_raw(ip, &raw);
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*axes = (raw * devp->hygrosensitivity) - devp->hygrobias;
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return msg;
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}
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/**
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* @brief Set bias values for the BaseHygrometer.
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* @note Bias must be expressed as %rH.
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* @note The bias buffer must be at least the same size of the
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* BaseHygrometer axes number.
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*
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* @param[in] ip pointer to @p BaseHygrometer interface.
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* @param[in] bp a buffer which contains biases.
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*
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* @return The operation status.
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* @retval MSG_OK if the function succeeded.
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* @retval MSG_RESET if one or more I2C errors occurred, the errors can
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* be retrieved using @p i2cGetErrors().
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* @retval MSG_TIMEOUT if a timeout occurred before operation end.
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*/
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static msg_t hygro_set_bias(void *ip, float *bp) {
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HTS221Driver* devp;
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msg_t msg = MSG_OK;
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osalDbgCheck((ip != NULL) && (bp != NULL));
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/* Getting parent instance pointer.*/
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devp = objGetInstance(HTS221Driver*, (BaseHygrometer*)ip);
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osalDbgAssert((devp->state == HTS221_READY),
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"hygro_set_bias(), invalid state");
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devp->hygrobias = *bp;
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return msg;
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}
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/**
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* @brief Reset bias values for the BaseHygrometer.
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* @note Default biases value are obtained from device datasheet when
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* available otherwise they are considered zero.
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*
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* @param[in] ip pointer to @p BaseHygrometer interface.
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*
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* @return The operation status.
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* @retval MSG_OK if the function succeeded.
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*/
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static msg_t hygro_reset_bias(void *ip) {
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HTS221Driver* devp;
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msg_t msg = MSG_OK;
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osalDbgCheck(ip != NULL);
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/* Getting parent instance pointer.*/
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devp = objGetInstance(HTS221Driver*, (BaseHygrometer*)ip);
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osalDbgAssert((devp->state == HTS221_READY),
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"hygro_reset_bias(), invalid state");
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devp->hygrobias = devp->hygrofactorybias;
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return msg;
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}
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/**
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* @brief Set sensitivity values for the BaseHygrometer.
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* @note Sensitivity must be expressed as %rH/LSB.
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* @note The sensitivity buffer must be at least the same size of the
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* BaseHygrometer axes number.
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*
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* @param[in] ip pointer to @p BaseHygrometer interface.
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* @param[in] sp a buffer which contains sensitivities.
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*
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* @return The operation status.
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* @retval MSG_OK if the function succeeded.
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*/
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static msg_t hygro_set_sensitivity(void *ip, float *sp) {
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HTS221Driver* devp;
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msg_t msg = MSG_OK;
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osalDbgCheck((ip != NULL) && (sp != NULL));
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/* Getting parent instance pointer.*/
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devp = objGetInstance(HTS221Driver*, (BaseHygrometer*)ip);
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osalDbgAssert((devp->state == HTS221_READY),
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"hygro_set_sensitivity(), invalid state");
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devp->hygrosensitivity = *sp;
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return msg;
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}
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/**
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* @brief Reset sensitivity values for the BaseHygrometer.
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* @note Default sensitivities value are obtained from device datasheet.
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*
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* @param[in] ip pointer to @p BaseHygrometer interface.
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|
|
*
|
||
|
|
* @return The operation status.
|
||
|
|
* @retval MSG_OK if the function succeeded.
|
||
|
|
*/
|
||
|
|
static msg_t hygro_reset_sensitivity(void *ip) {
|
||
|
|
HTS221Driver* devp;
|
||
|
|
msg_t msg = MSG_OK;
|
||
|
|
|
||
|
|
osalDbgCheck(ip != NULL);
|
||
|
|
|
||
|
|
/* Getting parent instance pointer.*/
|
||
|
|
devp = objGetInstance(HTS221Driver*, (BaseHygrometer*)ip);
|
||
|
|
|
||
|
|
osalDbgAssert((devp->state == HTS221_READY),
|
||
|
|
"hygro_reset_sensitivity(), invalid state");
|
||
|
|
|
||
|
|
devp->hygrosensitivity = devp->hygrofactorysensitivity;
|
||
|
|
return msg;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Return the number of axes of the BaseThermometer.
|
||
|
|
*
|
||
|
|
* @param[in] ip pointer to @p BaseThermometer interface.
|
||
|
|
*
|
||
|
|
* @return the number of axes.
|
||
|
|
*/
|
||
|
|
static size_t thermo_get_axes_number(void *ip) {
|
||
|
|
(void)ip;
|
||
|
|
|
||
|
|
return HTS221_THERMO_NUMBER_OF_AXES;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Retrieves raw data from the BaseThermometer.
|
||
|
|
* @note This data is retrieved from MEMS register without any algebraical
|
||
|
|
* manipulation.
|
||
|
|
* @note The axes array must be at least the same size of the
|
||
|
|
* BaseThermometer axes number.
|
||
|
|
*
|
||
|
|
* @param[in] ip pointer to @p BaseThermometer interface.
|
||
|
|
* @param[out] axes a buffer which would be filled with raw data.
|
||
|
|
*
|
||
|
|
* @return The operation status.
|
||
|
|
* @retval MSG_OK if the function succeeded.
|
||
|
|
* @retval MSG_RESET if one or more I2C errors occurred, the errors can
|
||
|
|
* be retrieved using @p i2cGetErrors().
|
||
|
|
* @retval MSG_TIMEOUT if a timeout occurred before operation end.
|
||
|
|
*/
|
||
|
|
static msg_t thermo_read_raw(void *ip, int32_t axes[]) {
|
||
|
|
HTS221Driver* devp;
|
||
|
|
int16_t tmp;
|
||
|
|
uint8_t buff[2];
|
||
|
|
msg_t msg;
|
||
|
|
|
||
|
|
osalDbgCheck((ip != NULL) && (axes != NULL));
|
||
|
|
|
||
|
|
/* Getting parent instance pointer.*/
|
||
|
|
devp = objGetInstance(HTS221Driver*, (BaseThermometer*)ip);
|
||
|
|
|
||
|
|
osalDbgAssert((devp->state == HTS221_READY),
|
||
|
|
"thermo_read_raw(), invalid state");
|
||
|
|
|
||
|
|
osalDbgAssert((devp->config->i2cp->state == I2C_READY),
|
||
|
|
"thermo_read_raw(), channel not ready");
|
||
|
|
|
||
|
|
#if HTS221_SHARED_I2C
|
||
|
|
i2cAcquireBus(devp->config->i2cp);
|
||
|
|
i2cStart(devp->config->i2cp,
|
||
|
|
devp->config->i2ccfg);
|
||
|
|
#endif /* HTS221_SHARED_I2C */
|
||
|
|
|
||
|
|
msg = hts221I2CReadRegister(devp->config->i2cp, HTS221_AD_TEMP_OUT_L,
|
||
|
|
buff, 2);
|
||
|
|
|
||
|
|
#if HTS221_SHARED_I2C
|
||
|
|
i2cReleaseBus(devp->config->i2cp);
|
||
|
|
#endif /* HTS221_SHARED_I2C */
|
||
|
|
|
||
|
|
if (msg == MSG_OK) {
|
||
|
|
tmp = buff[0] + (buff[1] << 8);
|
||
|
|
*axes = (int32_t)tmp;
|
||
|
|
}
|
||
|
|
return msg;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Retrieves cooked data from the BaseThermometer.
|
||
|
|
* @note This data is manipulated according to the formula
|
||
|
|
* cooked = (raw * sensitivity) - bias.
|
||
|
|
* @note Final data is expressed as °C.
|
||
|
|
* @note The axes array must be at least the same size of the
|
||
|
|
* BaseThermometer axes number.
|
||
|
|
*
|
||
|
|
* @param[in] ip pointer to @p BaseThermometer interface.
|
||
|
|
* @param[out] axis a buffer which would be filled with cooked data.
|
||
|
|
*
|
||
|
|
* @return The operation status.
|
||
|
|
* @retval MSG_OK if the function succeeded.
|
||
|
|
* @retval MSG_RESET if one or more I2C errors occurred, the errors can
|
||
|
|
* be retrieved using @p i2cGetErrors().
|
||
|
|
* @retval MSG_TIMEOUT if a timeout occurred before operation end.
|
||
|
|
*/
|
||
|
|
static msg_t thermo_read_cooked(void *ip, float* axis) {
|
||
|
|
HTS221Driver* devp;
|
||
|
|
int32_t raw;
|
||
|
|
msg_t msg;
|
||
|
|
|
||
|
|
osalDbgCheck((ip != NULL) && (axis != NULL));
|
||
|
|
|
||
|
|
/* Getting parent instance pointer.*/
|
||
|
|
devp = objGetInstance(HTS221Driver*, (BaseThermometer*)ip);
|
||
|
|
|
||
|
|
osalDbgAssert((devp->state == HTS221_READY),
|
||
|
|
"thermo_read_cooked(), invalid state");
|
||
|
|
|
||
|
|
msg = thermo_read_raw(devp, &raw);
|
||
|
|
|
||
|
|
*axis = (raw * devp->thermosensitivity) - devp->thermobias;
|
||
|
|
|
||
|
|
return msg;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Set bias values for the BaseThermometer.
|
||
|
|
* @note Bias must be expressed as °C.
|
||
|
|
* @note The bias buffer must be at least the same size of the
|
||
|
|
* BaseThermometer axes number.
|
||
|
|
*
|
||
|
|
* @param[in] ip pointer to @p BaseThermometer interface.
|
||
|
|
* @param[in] bp a buffer which contains biases.
|
||
|
|
*
|
||
|
|
* @return The operation status.
|
||
|
|
* @retval MSG_OK if the function succeeded.
|
||
|
|
*/
|
||
|
|
static msg_t thermo_set_bias(void *ip, float *bp) {
|
||
|
|
HTS221Driver* devp;
|
||
|
|
msg_t msg = MSG_OK;
|
||
|
|
|
||
|
|
osalDbgCheck((ip != NULL) && (bp != NULL));
|
||
|
|
|
||
|
|
/* Getting parent instance pointer.*/
|
||
|
|
devp = objGetInstance(HTS221Driver*, (BaseThermometer*)ip);
|
||
|
|
|
||
|
|
osalDbgAssert((devp->state == HTS221_READY),
|
||
|
|
"thermo_set_bias(), invalid state");
|
||
|
|
|
||
|
|
devp->thermobias = *bp;
|
||
|
|
|
||
|
|
return msg;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Reset bias values for the BaseThermometer.
|
||
|
|
* @note Default biases value are obtained from device datasheet when
|
||
|
|
* available otherwise they are considered zero.
|
||
|
|
*
|
||
|
|
* @param[in] ip pointer to @p BaseThermometer interface.
|
||
|
|
*
|
||
|
|
* @return The operation status.
|
||
|
|
* @retval MSG_OK if the function succeeded.
|
||
|
|
*/
|
||
|
|
static msg_t thermo_reset_bias(void *ip) {
|
||
|
|
HTS221Driver* devp;
|
||
|
|
msg_t msg = MSG_OK;
|
||
|
|
|
||
|
|
osalDbgCheck(ip != NULL);
|
||
|
|
|
||
|
|
/* Getting parent instance pointer.*/
|
||
|
|
devp = objGetInstance(HTS221Driver*, (BaseThermometer*)ip);
|
||
|
|
|
||
|
|
osalDbgAssert((devp->state == HTS221_READY),
|
||
|
|
"thermo_reset_bias(), invalid state");
|
||
|
|
|
||
|
|
devp->thermobias = devp->thermofactorybias;
|
||
|
|
|
||
|
|
return msg;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Set sensitivity values for the BaseThermometer.
|
||
|
|
* @note Sensitivity must be expressed as °C/LSB.
|
||
|
|
* @note The sensitivity buffer must be at least the same size of the
|
||
|
|
* BaseThermometer axes number.
|
||
|
|
*
|
||
|
|
* @param[in] ip pointer to @p BaseThermometer interface.
|
||
|
|
* @param[in] sp a buffer which contains sensitivities.
|
||
|
|
*
|
||
|
|
* @return The operation status.
|
||
|
|
* @retval MSG_OK if the function succeeded.
|
||
|
|
*/
|
||
|
|
static msg_t thermo_set_sensitivity(void *ip, float *sp) {
|
||
|
|
HTS221Driver* devp;
|
||
|
|
msg_t msg = MSG_OK;
|
||
|
|
|
||
|
|
osalDbgCheck((ip != NULL) && (sp != NULL));
|
||
|
|
|
||
|
|
/* Getting parent instance pointer.*/
|
||
|
|
devp = objGetInstance(HTS221Driver*, (BaseThermometer*)ip);
|
||
|
|
|
||
|
|
osalDbgAssert((devp->state == HTS221_READY),
|
||
|
|
"thermo_set_sensitivity(), invalid state");
|
||
|
|
|
||
|
|
devp->thermosensitivity = *sp;
|
||
|
|
|
||
|
|
return msg;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Reset sensitivity values for the BaseThermometer.
|
||
|
|
* @note Default sensitivities value are obtained from device datasheet.
|
||
|
|
*
|
||
|
|
* @param[in] ip pointer to @p BaseThermometer interface.
|
||
|
|
*
|
||
|
|
* @return The operation status.
|
||
|
|
* @retval MSG_OK if the function succeeded.
|
||
|
|
*/
|
||
|
|
static msg_t thermo_reset_sensitivity(void *ip) {
|
||
|
|
HTS221Driver* devp;
|
||
|
|
msg_t msg = MSG_OK;
|
||
|
|
|
||
|
|
osalDbgCheck(ip != NULL);
|
||
|
|
|
||
|
|
/* Getting parent instance pointer.*/
|
||
|
|
devp = objGetInstance(HTS221Driver*, (BaseThermometer*)ip);
|
||
|
|
|
||
|
|
osalDbgAssert((devp->state == HTS221_READY),
|
||
|
|
"thermo_reset_sensitivity(), invalid state");
|
||
|
|
|
||
|
|
devp->thermosensitivity = devp->thermofactorysensitivity;
|
||
|
|
|
||
|
|
return msg;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct HTS221VMT vmt_device = {
|
||
|
|
(size_t)0
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct BaseHygrometerVMT vmt_hygrometer = {
|
||
|
|
sizeof(struct HTS221VMT*),
|
||
|
|
hygro_get_axes_number, hygro_read_raw, hygro_read_cooked,
|
||
|
|
hygro_set_bias, hygro_reset_bias, hygro_set_sensitivity,
|
||
|
|
hygro_reset_sensitivity
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct BaseThermometerVMT vmt_thermometer = {
|
||
|
|
sizeof(struct HTS221VMT*) + sizeof(BaseHygrometer),
|
||
|
|
thermo_get_axes_number, thermo_read_raw, thermo_read_cooked,
|
||
|
|
thermo_set_bias, thermo_reset_bias, thermo_set_sensitivity,
|
||
|
|
thermo_reset_sensitivity
|
||
|
|
};
|
||
|
|
|
||
|
|
/*===========================================================================*/
|
||
|
|
/* Driver exported functions. */
|
||
|
|
/*===========================================================================*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Initializes an instance.
|
||
|
|
*
|
||
|
|
* @param[out] devp pointer to the @p HTS221Driver object
|
||
|
|
*
|
||
|
|
* @init
|
||
|
|
*/
|
||
|
|
void hts221ObjectInit(HTS221Driver *devp) {
|
||
|
|
|
||
|
|
devp->vmt = &vmt_device;
|
||
|
|
devp->hygro_if.vmt = &vmt_hygrometer;
|
||
|
|
devp->thermo_if.vmt = &vmt_thermometer;
|
||
|
|
|
||
|
|
devp->config = NULL;
|
||
|
|
|
||
|
|
devp->hygroaxes = HTS221_HYGRO_NUMBER_OF_AXES;
|
||
|
|
devp->thermoaxes = HTS221_THERMO_NUMBER_OF_AXES;
|
||
|
|
|
||
|
|
devp->hygrobias = 0.0f;
|
||
|
|
devp->thermobias = 0.0f;
|
||
|
|
|
||
|
|
devp->state = HTS221_STOP;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Configures and activates HTS221 Complex Driver peripheral.
|
||
|
|
*
|
||
|
|
* @param[in] devp pointer to the @p HTS221Driver object
|
||
|
|
* @param[in] config pointer to the @p HTS221Config object
|
||
|
|
*
|
||
|
|
* @api
|
||
|
|
*/
|
||
|
|
void hts221Start(HTS221Driver *devp, const HTS221Config *config) {
|
||
|
|
uint8_t cr[2];
|
||
|
|
osalDbgCheck((devp != NULL) && (config != NULL));
|
||
|
|
|
||
|
|
osalDbgAssert((devp->state == HTS221_STOP) || (devp->state == HTS221_READY),
|
||
|
|
"hts221Start(), invalid state");
|
||
|
|
|
||
|
|
devp->config = config;
|
||
|
|
|
||
|
|
#if HTS221_SHARED_I2C
|
||
|
|
i2cAcquireBus(devp->config->i2cp);
|
||
|
|
#endif /* HTS221_SHARED_I2C */
|
||
|
|
|
||
|
|
/* Intializing the I2C. */
|
||
|
|
i2cStart(devp->config->i2cp, devp->config->i2ccfg);
|
||
|
|
|
||
|
|
hts221Calibrate(devp);
|
||
|
|
|
||
|
|
#if HTS221_SHARED_I2C
|
||
|
|
i2cReleaseBus(devp->config->i2cp);
|
||
|
|
#endif /* HTS221_SHARED_I2C */
|
||
|
|
|
||
|
|
|
||
|
|
if(devp->config->hygrosensitivity == NULL) {
|
||
|
|
devp->hygrosensitivity = devp->hygrofactorysensitivity;
|
||
|
|
}
|
||
|
|
else{
|
||
|
|
/* Taking hygrometer sensitivity from user configurations */
|
||
|
|
devp->hygrosensitivity = *(devp->config->hygrosensitivity);
|
||
|
|
}
|
||
|
|
|
||
|
|
if(devp->config->hygrobias == NULL) {
|
||
|
|
devp->hygrobias = devp->hygrofactorybias;
|
||
|
|
}
|
||
|
|
else{
|
||
|
|
/* Taking hygrometer bias from user configurations */
|
||
|
|
devp->hygrobias = *(devp->config->hygrobias);
|
||
|
|
}
|
||
|
|
|
||
|
|
if(devp->config->thermosensitivity == NULL) {
|
||
|
|
devp->thermosensitivity = devp->thermofactorysensitivity;
|
||
|
|
}
|
||
|
|
else{
|
||
|
|
/* Taking thermometer sensitivity from user configurations */
|
||
|
|
devp->thermosensitivity = *(devp->config->thermosensitivity);
|
||
|
|
}
|
||
|
|
|
||
|
|
if(devp->config->thermobias == NULL) {
|
||
|
|
devp->thermobias = devp->thermofactorybias;
|
||
|
|
}
|
||
|
|
else{
|
||
|
|
/* Taking thermometer bias from user configurations */
|
||
|
|
devp->thermobias = *(devp->config->thermobias);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Control register 1 configuration block.*/
|
||
|
|
{
|
||
|
|
cr[0] = HTS221_AD_CTRL_REG1;
|
||
|
|
cr[1] = devp->config->outputdatarate | HTS221_CTRL_REG1_PD;
|
||
|
|
#if HTS221_USE_ADVANCED || defined(__DOXYGEN__)
|
||
|
|
cr[1] |= devp->config->blockdataupdate;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if HTS221_SHARED_I2C
|
||
|
|
i2cAcquireBus(devp->config->i2cp);
|
||
|
|
i2cStart(devp->config->i2cp, devp->config->i2ccfg);
|
||
|
|
#endif /* HTS221_SHARED_I2C */
|
||
|
|
|
||
|
|
hts221I2CWriteRegister(devp->config->i2cp, cr, 1);
|
||
|
|
|
||
|
|
#if HTS221_SHARED_I2C
|
||
|
|
i2cReleaseBus(devp->config->i2cp);
|
||
|
|
#endif /* HTS221_SHARED_I2C */
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Average register configuration block.*/
|
||
|
|
{
|
||
|
|
cr[0] = HTS221_AD_AV_CONF;
|
||
|
|
cr[1] = 0x05;
|
||
|
|
#if HTS221_USE_ADVANCED || defined(__DOXYGEN__)
|
||
|
|
cr[1] = devp->config->hygroresolution | devp->config->thermoresolution;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if HTS221_SHARED_I2C
|
||
|
|
i2cAcquireBus(devp->config->i2cp);
|
||
|
|
i2cStart(devp->config->i2cp, devp->config->i2ccfg);
|
||
|
|
#endif /* HTS221_SHARED_I2C */
|
||
|
|
|
||
|
|
hts221I2CWriteRegister(devp->config->i2cp, cr, 1);
|
||
|
|
|
||
|
|
#if HTS221_SHARED_I2C
|
||
|
|
i2cReleaseBus(devp->config->i2cp);
|
||
|
|
#endif /* HTS221_SHARED_I2C */
|
||
|
|
}
|
||
|
|
|
||
|
|
/* This is the MEMS transient recovery time */
|
||
|
|
osalThreadSleepMilliseconds(5);
|
||
|
|
|
||
|
|
devp->state = HTS221_READY;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Deactivates the HTS221 Complex Driver peripheral.
|
||
|
|
*
|
||
|
|
* @param[in] devp pointer to the @p HTS221Driver object
|
||
|
|
*
|
||
|
|
* @api
|
||
|
|
*/
|
||
|
|
void hts221Stop(HTS221Driver *devp) {
|
||
|
|
uint8_t cr[2];
|
||
|
|
|
||
|
|
osalDbgCheck(devp != NULL);
|
||
|
|
|
||
|
|
osalDbgAssert((devp->state == HTS221_STOP) || (devp->state == HTS221_READY),
|
||
|
|
"hts221Stop(), invalid state");
|
||
|
|
|
||
|
|
if (devp->state == HTS221_READY) {
|
||
|
|
|
||
|
|
#if HTS221_SHARED_I2C
|
||
|
|
i2cAcquireBus(devp->config->i2cp);
|
||
|
|
i2cStart(devp->config->i2cp, devp->config->i2ccfg);
|
||
|
|
#endif /* HTS221_SHARED_I2C */
|
||
|
|
|
||
|
|
cr[0] = HTS221_AD_CTRL_REG1;
|
||
|
|
cr[1] = 0;
|
||
|
|
hts221I2CWriteRegister(devp->config->i2cp, cr, 1);
|
||
|
|
|
||
|
|
i2cStop(devp->config->i2cp);
|
||
|
|
#if HTS221_SHARED_I2C
|
||
|
|
i2cReleaseBus(devp->config->i2cp);
|
||
|
|
#endif /* HTS221_SHARED_I2C */
|
||
|
|
}
|
||
|
|
devp->state = HTS221_STOP;
|
||
|
|
}
|
||
|
|
/** @} */
|