mirror of https://github.com/rusefi/ChibiOS.git
571 lines
17 KiB
C
571 lines
17 KiB
C
/*
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ChibiOS - Copyright (C) 2016 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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* @notapi
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*/
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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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* @notapi
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*/
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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 Compute biases and sensitivities starting from data stored in
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* calibration registers.
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* @notapi
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*
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* @param[in] devp pointer to the HTS221 interface
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* @param[in] flag flag to select parameters
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* @return the operation status.
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*/
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msg_t hts221Calibrate(HTS221Driver *devp, uint8_t flag) {
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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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float sens;
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#if HTS221_SHARED_I2C
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i2cAcquireBus(devp->config->i2cp);
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i2cStart(devp->config->i2cp, devp->config->i2ccfg);
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#endif /* HTS221_SHARED_I2C */
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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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#if HTS221_SHARED_I2C
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i2cReleaseBus(devp->config->i2cp);
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#endif /* HTS221_SHARED_I2C */
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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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sens = ((float)H1_rH_x2 - (float)H0_rH_x2) /
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(2.0f * ((float)H1_T0_OUT - (float)H0_T0_OUT));
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if (flag & HTS221_FLAG_HYGRO_SENS)
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devp->sensitivity[0] = sens;
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if (flag & HTS221_FLAG_HYGRO_BIAS)
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devp->bias[0] = (sens * (float)H0_T0_OUT) -
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((float)H0_rH_x2 / 2.0f);
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sens = ((float)T1_degC_x8 - (float)T0_degC_x8) /
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(8.0f * ((float)T1_OUT - (float)T0_OUT));
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if (flag & HTS221_FLAG_THERMO_SENS)
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devp->sensitivity[1] = sens;
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if (flag & HTS221_FLAG_THERMO_BIAS)
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devp->bias[1] = (sens * (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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* Interface implementation.
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*/
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static size_t hygro_get_axes_number(void *ip) {
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osalDbgCheck(ip != NULL);
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return HTS221_HYGRO_NUMBER_OF_AXES;
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}
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static size_t thermo_get_axes_number(void *ip) {
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osalDbgCheck(ip != NULL);
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return HTS221_THERMO_NUMBER_OF_AXES;
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}
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static size_t sens_get_axes_number(void *ip) {
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osalDbgCheck(ip != NULL);
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return (thermo_get_axes_number(ip) + hygro_get_axes_number(ip));
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}
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static msg_t hygro_read_raw(void *ip, int32_t* axis) {
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int16_t tmp;
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uint8_t buff[2];
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msg_t msg = MSG_OK;
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*axis = 0;
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osalDbgCheck((ip != NULL) && (axis != NULL));
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osalDbgAssert((((HTS221Driver *)ip)->state == HTS221_READY),
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"hygro_read_raw(), invalid state");
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#if HTS221_USE_I2C
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osalDbgAssert((((HTS221Driver *)ip)->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(((HTS221Driver *)ip)->config->i2cp);
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i2cStart(((HTS221Driver *)ip)->config->i2cp,
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((HTS221Driver *)ip)->config->i2ccfg);
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#endif /* HTS221_SHARED_I2C */
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msg = hts221I2CReadRegister(((HTS221Driver *)ip)->config->i2cp,
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HTS221_AD_HUMIDITY_OUT_L, buff, 2);
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#if HTS221_SHARED_I2C
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i2cReleaseBus(((HTS221Driver *)ip)->config->i2cp);
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#endif /* HTS221_SHARED_I2C */
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#endif /* HTS221_USE_I2C */
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if (msg == MSG_OK) {
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tmp = buff[0] + (buff[1] << 8);
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*axis = (int32_t)tmp;
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}
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return msg;
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}
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static msg_t thermo_read_raw(void *ip, int32_t axis[]) {
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int16_t tmp;
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uint8_t buff[2];
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msg_t msg = MSG_OK;
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*axis = 0.0f;
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osalDbgCheck((ip != NULL) && (axis != NULL));
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osalDbgAssert((((HTS221Driver *)ip)->state == HTS221_READY),
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"thermo_read_raw(), invalid state");
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#if HTS221_USE_I2C
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osalDbgAssert((((HTS221Driver *)ip)->config->i2cp->state == I2C_READY),
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"thermo_read_raw(), channel not ready");
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#if HTS221_SHARED_I2C
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i2cAcquireBus(((HTS221Driver *)ip)->config->i2cp);
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i2cStart(((HTS221Driver *)ip)->config->i2cp,
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((HTS221Driver *)ip)->config->i2ccfg);
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#endif /* HTS221_SHARED_I2C */
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msg = hts221I2CReadRegister(((HTS221Driver *)ip)->config->i2cp,
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HTS221_AD_TEMP_OUT_L, buff, 2);
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#if HTS221_SHARED_I2C
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i2cReleaseBus(((HTS221Driver *)ip)->config->i2cp);
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#endif /* HTS221_SHARED_I2C */
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#endif /* HTS221_USE_I2C */
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if (msg == MSG_OK) {
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tmp = buff[0] + (buff[1] << 8);
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*axis = (int32_t)tmp;
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}
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return msg;
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}
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static msg_t sens_read_raw(void *ip, int32_t axes[]) {
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int32_t* bp = axes;
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msg_t msg;
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msg = hygro_read_raw(ip, bp);
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if (msg != MSG_OK){
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return msg;
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}
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bp += HTS221_HYGRO_NUMBER_OF_AXES;
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return thermo_read_raw(ip, bp);
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}
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static msg_t hygro_read_cooked(void *ip, float* axis) {
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int32_t raw;
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msg_t msg;
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osalDbgCheck((ip != NULL) && (axis != NULL));
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osalDbgAssert((((HTS221Driver *)ip)->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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*axis = raw * ((HTS221Driver *)ip)->sensitivity[0];
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*axis -= ((HTS221Driver *)ip)->bias[0];
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return msg;
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}
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static msg_t thermo_read_cooked(void *ip, float* axis) {
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int32_t raw;
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msg_t msg;
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osalDbgCheck((ip != NULL) && (axis != NULL));
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osalDbgAssert((((HTS221Driver *)ip)->state == HTS221_READY),
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"thermo_read_cooked(), invalid state");
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msg = thermo_read_raw(ip, &raw);
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*axis = raw * ((HTS221Driver *)ip)->sensitivity[1];
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*axis -= ((HTS221Driver *)ip)->bias[1];
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return msg;
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}
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static msg_t sens_read_cooked(void *ip, float axes[]) {
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float *dp = axes;
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msg_t msg;
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osalDbgCheck((ip != NULL) && (axes != NULL));
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osalDbgAssert((((HTS221Driver *)ip)->state == HTS221_READY),
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"sens_read_cooked(), invalid state");
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msg = hygro_read_cooked(ip, dp);
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if (msg != MSG_OK)
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return msg;
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dp += HTS221_THERMO_NUMBER_OF_AXES;
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return thermo_read_cooked(ip, dp);
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}
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static msg_t hygro_set_bias(void *ip, float *bp) {
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osalDbgCheck((ip != NULL) && (bp != NULL));
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osalDbgAssert((((HTS221Driver *)ip)->state == HTS221_READY) ||
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(((HTS221Driver *)ip)->state == HTS221_STOP),
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"hygro_set_bias(), invalid state");
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((HTS221Driver *)ip)->bias[0] = *bp;
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return MSG_OK;
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}
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static msg_t thermo_set_bias(void *ip, float *bp) {
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osalDbgCheck((ip != NULL) && (bp != NULL));
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osalDbgAssert((((HTS221Driver *)ip)->state == HTS221_READY) ||
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(((HTS221Driver *)ip)->state == HTS221_STOP),
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"thermo_set_bias(), invalid state");
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((HTS221Driver *)ip)->bias[1] = *bp;
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return MSG_OK;
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}
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static msg_t hygro_reset_bias(void *ip) {
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osalDbgCheck(ip != NULL);
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osalDbgAssert((((HTS221Driver *)ip)->state == HTS221_READY) ||
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(((HTS221Driver *)ip)->state == HTS221_STOP),
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"hygro_reset_bias(), invalid state");
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return hts221Calibrate(ip, HTS221_FLAG_HYGRO_BIAS);
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}
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static msg_t thermo_reset_bias(void *ip) {
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osalDbgCheck(ip != NULL);
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osalDbgAssert((((HTS221Driver *)ip)->state == HTS221_READY) ||
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(((HTS221Driver *)ip)->state == HTS221_STOP),
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"thermo_reset_bias(), invalid state");
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return hts221Calibrate(ip, HTS221_FLAG_THERMO_BIAS);
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}
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static msg_t hygro_set_sensitivity(void *ip, float *sp) {
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osalDbgCheck((ip != NULL) && (sp != NULL));
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osalDbgAssert((((HTS221Driver *)ip)->state == HTS221_READY) ||
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(((HTS221Driver *)ip)->state == HTS221_STOP),
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"hygro_set_sensitivity(), invalid state");
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((HTS221Driver *)ip)->sensitivity[0] = *sp;
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return MSG_OK;
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}
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static msg_t thermo_set_sensitivity(void *ip, float *sp) {
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osalDbgCheck((ip != NULL) && (sp != NULL));
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osalDbgAssert((((HTS221Driver *)ip)->state == HTS221_READY) ||
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(((HTS221Driver *)ip)->state == HTS221_STOP),
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"thermo_set_sensitivity(), invalid state");
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return hts221Calibrate(ip, HTS221_FLAG_THERMO_SENS);
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}
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static msg_t hygro_reset_sensitivity(void *ip) {
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osalDbgCheck(ip != NULL);
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osalDbgAssert((((HTS221Driver *)ip)->state == HTS221_READY) ||
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(((HTS221Driver *)ip)->state == HTS221_STOP),
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"hygro_reset_sensitivity(), invalid state");
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return hts221Calibrate(ip, HTS221_FLAG_HYGRO_SENS);
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}
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static msg_t thermo_reset_sensitivity(void *ip) {
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osalDbgCheck(ip != NULL);
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osalDbgAssert((((HTS221Driver *)ip)->state == HTS221_READY) ||
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(((HTS221Driver *)ip)->state == HTS221_STOP),
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"thermo_reset_sensitivity(), invalid state");
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((HTS221Driver *)ip)->sensitivity[1] = HTS221_THERMO_SENS;
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return MSG_OK;
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}
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static const struct BaseSensorVMT vmt_sensor = {
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sens_get_axes_number, sens_read_raw, sens_read_cooked
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};
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static const struct HTS221HygrometerVMT vmt_hygrometer = {
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hygro_get_axes_number, hygro_read_raw, hygro_read_cooked,
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hygro_set_bias, hygro_reset_bias,
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hygro_set_sensitivity, hygro_reset_sensitivity
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};
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static const struct HTS221ThermometerVMT vmt_thermometer = {
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thermo_get_axes_number, thermo_read_raw, thermo_read_cooked,
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thermo_set_bias, thermo_reset_bias,
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thermo_set_sensitivity, thermo_reset_sensitivity
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};
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/*===========================================================================*/
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/* Driver exported functions. */
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/*===========================================================================*/
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/**
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* @brief Initializes an instance.
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*
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* @param[out] devp pointer to the @p HTS221Driver object
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*
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* @init
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*/
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void hts221ObjectInit(HTS221Driver *devp) {
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devp->vmt_sensor = &vmt_sensor;
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devp->vmt_hygrometer = &vmt_hygrometer;
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devp->vmt_thermometer = &vmt_thermometer;
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devp->config = NULL;
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devp->state = HTS221_STOP;
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devp->bias[0] = 0.0;
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devp->bias[1] = 0.0;
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devp->sensitivity[0] = 0.0;
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devp->sensitivity[1] = 0.0;
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}
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/**
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* @brief Configures and activates HTS221 Complex Driver peripheral.
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*
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* @param[in] devp pointer to the @p HTS221Driver object
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* @param[in] config pointer to the @p HTS221Config object
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*
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* @api
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*/
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void hts221Start(HTS221Driver *devp, const HTS221Config *config) {
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uint8_t cr[2];
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osalDbgCheck((devp != NULL) && (config != NULL));
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osalDbgAssert((devp->state == HTS221_STOP) || (devp->state == HTS221_READY),
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"hts221Start(), invalid state");
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devp->config = config;
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#if HTS221_USE_I2C
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/* Control register 1 configuration block.*/
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{
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cr[0] = HTS221_AD_CTRL_REG1;
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cr[1] = devp->config->outputdatarate | HTS221_CTRL_REG1_PD;
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#if HTS221_USE_ADVANCED || defined(__DOXYGEN__)
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cr[1] |= devp->config->blockdataupdate;
|
|
#endif
|
|
|
|
#if HTS221_SHARED_I2C
|
|
i2cAcquireBus((devp)->config->i2cp);
|
|
#endif /* HTS221_SHARED_I2C */
|
|
i2cStart((devp)->config->i2cp,
|
|
(devp)->config->i2ccfg);
|
|
|
|
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->reshumidity | devp->config->restemperature;
|
|
#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 */
|
|
}
|
|
#endif /* HTS221_USE_I2C */
|
|
|
|
if (devp->config->sensitivity == NULL) {
|
|
hts221Calibrate(devp, HTS221_FLAG_HYGRO_SENS | HTS221_FLAG_THERMO_SENS);
|
|
}
|
|
else{
|
|
/* Taking Sensitivity from user configurations */
|
|
devp->sensitivity[0] = devp->config->sensitivity[0];
|
|
devp->sensitivity[1] = devp->config->sensitivity[1];
|
|
}
|
|
|
|
if (devp->config->bias == NULL) {
|
|
hts221Calibrate(devp, HTS221_FLAG_HYGRO_BIAS | HTS221_FLAG_THERMO_BIAS);
|
|
}
|
|
else {
|
|
/* Taking Bias from user configurations */
|
|
devp->bias[0] = devp->config->bias[0];
|
|
devp->bias[1] = devp->config->bias[1];
|
|
}
|
|
|
|
/* 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_USE_I2C)
|
|
#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 */
|
|
#endif /* HTS221_USE_I2C */
|
|
}
|
|
devp->state = HTS221_STOP;
|
|
}
|
|
/** @} */
|