From 48026bb824fd2d9cfb00ecd040db6ef3a416bae9 Mon Sep 17 00:00:00 2001 From: Clyne Sullivan Date: Fri, 22 Jan 2021 21:43:36 -0500 Subject: upload initial port --- ChibiOS_20.3.2/os/ex/devices/ST/hts221.c | 781 +++++++++++++++++++++++++++++++ 1 file changed, 781 insertions(+) create mode 100644 ChibiOS_20.3.2/os/ex/devices/ST/hts221.c (limited to 'ChibiOS_20.3.2/os/ex/devices/ST/hts221.c') diff --git a/ChibiOS_20.3.2/os/ex/devices/ST/hts221.c b/ChibiOS_20.3.2/os/ex/devices/ST/hts221.c new file mode 100644 index 0000000..eb04ef7 --- /dev/null +++ b/ChibiOS_20.3.2/os/ex/devices/ST/hts221.c @@ -0,0 +1,781 @@ +/* + ChibiOS - Copyright (C) 2016..2019 Rocco Marco Guglielmi + + This file is part of ChibiOS. + + ChibiOS is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + ChibiOS is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . + +*/ + +/** + * @file hts221.c + * @brief HTS221 MEMS interface module code. + * + * @addtogroup HTS221 + * @ingroup EX_ST + * @{ + */ + +#include "hal.h" +#include "hts221.h" + +/*===========================================================================*/ +/* Driver local definitions. */ +/*===========================================================================*/ + +#define HTS221_SEL(mask, offset) (int16_t)(mask << offset) + +#define HTS221_FLAG_HYGRO_BIAS 0x01 +#define HTS221_FLAG_HYGRO_SENS 0x02 +#define HTS221_FLAG_THERMO_BIAS 0x04 +#define HTS221_FLAG_THERMO_SENS 0x08 + +/*===========================================================================*/ +/* Driver exported variables. */ +/*===========================================================================*/ + +/*===========================================================================*/ +/* Driver local variables and types. */ +/*===========================================================================*/ + +/*===========================================================================*/ +/* Driver local functions. */ +/*===========================================================================*/ + +#if (HTS221_USE_I2C) || defined(__DOXYGEN__) +/** + * @brief Reads registers value using I2C. + * @pre The I2C interface must be initialized and the driver started. + * + * @param[in] i2cp pointer to the I2C interface + * @param[in] reg first sub-register address + * @param[out] rxbuf pointer to an output buffer + * @param[in] n number of consecutive register to read + * @return the operation status. + * + * @notapi + */ +static msg_t hts221I2CReadRegister(I2CDriver *i2cp, uint8_t reg, uint8_t* rxbuf, + size_t n) { + uint8_t txbuf = reg; + if (n > 1) + txbuf |= HTS221_SUB_MS; + + return i2cMasterTransmitTimeout(i2cp, HTS221_SAD, &txbuf, 1, rxbuf, n, + TIME_INFINITE); +} + +/** + * @brief Writes a value into a register using I2C. + * @pre The I2C interface must be initialized and the driver started. + * + * @param[in] i2cp pointer to the I2C interface + * @param[in] txbuf buffer containing sub-address value in first position + * and values to write + * @param[in] n size of txbuf less one (not considering the first + * element) + * @return the operation status. + * + * @notapi + */ +static msg_t hts221I2CWriteRegister(I2CDriver *i2cp, uint8_t* txbuf, size_t n) { + if (n > 1) + (*txbuf) |= HTS221_SUB_MS; + + return i2cMasterTransmitTimeout(i2cp, HTS221_SAD, txbuf, n + 1, NULL, 0, + TIME_INFINITE); +} +#endif /* HTS221_USE_I2C */ + +/** + * @brief Computes biases and sensitivities starting from data stored in + * calibration registers. + * @note Factory bias and sensitivity values are stored into the driver + * structure. + * + * @param[in] devp pointer to the HTS221 interface + * @return the operation status. + * + * @notapi + */ +static msg_t hts221Calibrate(HTS221Driver *devp) { + msg_t msg; + uint8_t calib[16], H0_rH_x2, H1_rH_x2, msb; + int16_t H0_T0_OUT, H1_T0_OUT, T0_degC_x8, T1_degC_x8, T0_OUT, T1_OUT; + + /* Retrieving rH values from Calibration registers */ + msg = hts221I2CReadRegister(devp->config->i2cp, + HTS221_AD_CALIB_0, calib, 16); + + H0_rH_x2 = calib[0]; + H1_rH_x2 = calib[1]; + H0_T0_OUT = calib[6]; + H0_T0_OUT += calib[7] << 8; + H1_T0_OUT = calib[10]; + H1_T0_OUT += calib[11] << 8; + + T0_degC_x8 = calib[2]; + + /* Completing T0_degC_x8 value */ + msb = (calib[5] & HTS221_SEL(0x03, 0)); + if (msb & HTS221_SEL(0x01, 1)) { + msb |= HTS221_SEL(0x3F, 2); + } + T0_degC_x8 += msb << 8; + + T1_degC_x8 = calib[3]; + /* Completing T1_degC_x8 value */ + msb = ((calib[5] & HTS221_SEL(0x03, 2)) >> 2); + if (msb & HTS221_SEL(0x01, 1)) { + msb |= HTS221_SEL(0x3F, 2); + } + T1_degC_x8 += msb << 8; + + T0_OUT = calib[12]; + T0_OUT += calib[13] << 8; + T1_OUT = calib[14]; + T1_OUT += calib[15] << 8; + + devp->hygrofactorysensitivity = ((float)H1_rH_x2 - (float)H0_rH_x2) / + (((float)H1_T0_OUT - (float)H0_T0_OUT) * 2.0f); + + + devp->hygrofactorybias = (devp->hygrofactorysensitivity * (float)H0_T0_OUT) - + ((float)H0_rH_x2 / 2.0f); + + devp->thermofactorysensitivity = ((float)T1_degC_x8 - (float)T0_degC_x8) / + (((float)T1_OUT - (float)T0_OUT) * 8.0f); + + devp->thermofactorybias = (devp->thermofactorysensitivity * (float)T0_OUT) - + ((float)T0_degC_x8 / 8.0f); + + return msg; +} + +/** + * @brief Return the number of axes of the BaseHygrometer. + * + * @param[in] ip pointer to @p BaseHygrometer interface. + * + * @return the number of axes. + */ +static size_t hygro_get_axes_number(void *ip) { + (void)ip; + + return HTS221_HYGRO_NUMBER_OF_AXES; +} + +/** + * @brief Retrieves raw data from the BaseHygrometer. + * @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 + * BaseHygrometer axes number. + * + * @param[in] ip pointer to @p BaseHygrometer 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 hygro_read_raw(void *ip, int32_t axes[]) { + HTS221Driver* devp; + uint8_t buff[2]; + int16_t tmp; + msg_t msg; + + osalDbgCheck((ip != NULL) && (axes != NULL)); + + /* Getting parent instance pointer.*/ + devp = objGetInstance(HTS221Driver*, (BaseHygrometer*)ip); + + osalDbgAssert((devp->state == HTS221_READY), + "hygro_read_raw(), invalid state"); + + osalDbgAssert((devp->config->i2cp->state == I2C_READY), + "hygro_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_HUMIDITY_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 BaseHygrometer. + * @note This data is manipulated according to the formula + * cooked = (raw * sensitivity) - bias. + * @note Final data is expressed as %rH. + * @note The axes array must be at least the same size of the + * BaseHygrometer axes number. + * + * @param[in] ip pointer to @p BaseHygrometer interface. + * @param[out] axes 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 hygro_read_cooked(void *ip, float axes[]) { + HTS221Driver* devp; + int32_t raw; + msg_t msg; + + osalDbgCheck((ip != NULL) && (axes != NULL)); + + /* Getting parent instance pointer.*/ + devp = objGetInstance(HTS221Driver*, (BaseHygrometer*)ip); + + osalDbgAssert((devp->state == HTS221_READY), + "hygro_read_cooked(), invalid state"); + + msg = hygro_read_raw(ip, &raw); + + *axes = (raw * devp->hygrosensitivity) - devp->hygrobias; + + return msg; +} + +/** + * @brief Set bias values for the BaseHygrometer. + * @note Bias must be expressed as %rH. + * @note The bias buffer must be at least the same size of the + * BaseHygrometer axes number. + * + * @param[in] ip pointer to @p BaseHygrometer interface. + * @param[in] bp a buffer which contains biases. + * + * @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 hygro_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*, (BaseHygrometer*)ip); + + osalDbgAssert((devp->state == HTS221_READY), + "hygro_set_bias(), invalid state"); + + devp->hygrobias = *bp; + return msg; +} + +/** + * @brief Reset bias values for the BaseHygrometer. + * @note Default biases value are obtained from device datasheet when + * available otherwise they are considered zero. + * + * @param[in] ip pointer to @p BaseHygrometer interface. + * + * @return The operation status. + * @retval MSG_OK if the function succeeded. + */ +static msg_t hygro_reset_bias(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_bias(), invalid state"); + + devp->hygrobias = devp->hygrofactorybias; + return msg; +} + +/** + * @brief Set sensitivity values for the BaseHygrometer. + * @note Sensitivity must be expressed as %rH/LSB. + * @note The sensitivity buffer must be at least the same size of the + * BaseHygrometer axes number. + * + * @param[in] ip pointer to @p BaseHygrometer interface. + * @param[in] sp a buffer which contains sensitivities. + * + * @return The operation status. + * @retval MSG_OK if the function succeeded. + */ +static msg_t hygro_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*, (BaseHygrometer*)ip); + + osalDbgAssert((devp->state == HTS221_READY), + "hygro_set_sensitivity(), invalid state"); + + devp->hygrosensitivity = *sp; + return msg; +} + +/** + * @brief Reset sensitivity values for the BaseHygrometer. + * @note Default sensitivities value are obtained from device datasheet. + * + * @param[in] ip pointer to @p BaseHygrometer interface. + * + * @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; +} +/** @} */ -- cgit v1.2.3