From e4bdd6d759d0bc5e9d30db302fb7e7a6a45e03d3 Mon Sep 17 00:00:00 2001 From: Theodore Ateba Date: Fri, 22 Sep 2017 20:49:12 +0000 Subject: Add Bosch digital barometer driver to ChibiOS/EX. git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@10684 35acf78f-673a-0410-8e92-d51de3d6d3f4 --- os/ex/Bosch/bmp085.c | 815 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 815 insertions(+) create mode 100644 os/ex/Bosch/bmp085.c (limited to 'os/ex/Bosch/bmp085.c') diff --git a/os/ex/Bosch/bmp085.c b/os/ex/Bosch/bmp085.c new file mode 100644 index 000000000..82676dc4c --- /dev/null +++ b/os/ex/Bosch/bmp085.c @@ -0,0 +1,815 @@ +/* + ChibiOS - Copyright (C) 2016..2017 Theodore Ateba + + 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 bmp085.c + * + * @brief BMP085 Digital pressure sensor interface module code. + * + * @author Theodore Ateba, tf.ateba@gmail.com + * + * @date 19 July 2016 + * + * TODO: Read the altitude with the sensor. + * + * @{ + */ + +/*==========================================================================*/ +/* Include files. */ +/*==========================================================================*/ + +/* ChibiOS HAL file. */ +#include "hal.h" + +/* ChibiOS EX file. */ +#include "bmp085.h" + +/*==========================================================================*/ +/* Driver local definitions. */ +/*==========================================================================*/ + +/*==========================================================================*/ +/* Driver exported variables. */ +/*==========================================================================*/ + +/*==========================================================================*/ +/* Driver local variables and types. */ +/*==========================================================================*/ + +/** + * @brief Variables for Temperature and Pressure measurement. + */ +static int16_t ac1; +static int16_t ac2; +static int16_t ac3; +static int16_t b1; +static int16_t b2; +static int16_t mb; +static int16_t mc; +static int16_t md; +static uint16_t ac4; +static uint16_t ac5; +static uint16_t ac6; +static int32_t b5; + +/*==========================================================================*/ +/* Driver local functions. */ +/*==========================================================================*/ + +#if (BMP085_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] rxbufp pointer to an output buffer + * @param[in] n number of consecutive register to read + * + * @return the operation status + * @notapi + */ +msg_t bmp085I2CReadRegister(I2CDriver *i2cp, uint8_t reg, uint8_t *rxbufp, + size_t n) { + uint8_t txbuf = reg; + + return i2cMasterTransmitTimeout(i2cp, BMP085_SAD, &txbuf, 1, rxbufp, 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] txbufp 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 + */ +msg_t bmp085I2CWriteRegister(I2CDriver *i2cp, uint8_t *txbufp, size_t n) { + + return i2cMasterTransmitTimeout(i2cp, BMP085_SAD, txbufp, n + 1, NULL, 0, + TIME_INFINITE); +} +#endif /* BMP085_USE_I2C */ + +/** + * @brief Read all the calibration data from the BMP085 EEPROM. + * @pre The I2C interface must be initialized and the driver started. + * + * @param[in] devp pointer to the BMP085 device driver sensor + * @param[in] reg first calibration coefficient register to read + * + * @return msg the operation status + */ +static msg_t bmp085ReadCoefficient(BMP085Driver *devp, uint8_t reg) { + + uint8_t rxbuf[22]; + +#if BMP085_SHARED_I2C + i2cAcquireBus(devp->config->i2cp); +#endif /* BMP085_SHARED_I2C */ + + msg_t msg = bmp085I2CReadRegister(devp->config->i2cp, reg, rxbuf, 22); + +#if BMP085_SHARED_I2C + i2cReleaseBus(devp->config->i2cp); +#endif /* BMP085_SHARED_I2C */ + + if (msg == MSG_OK) { + ac1 = ((rxbuf[ 0] << 8) | rxbuf[ 1]); + ac2 = ((rxbuf[ 2] << 8) | rxbuf[ 3]); + ac3 = ((rxbuf[ 4] << 8) | rxbuf[ 5]); + ac4 = ((rxbuf[ 6] << 8) | rxbuf[ 7]); + ac5 = ((rxbuf[ 8] << 8) | rxbuf[ 9]); + ac6 = ((rxbuf[10] << 8) | rxbuf[11]); + b1 = ((rxbuf[12] << 8) | rxbuf[13]); + b2 = ((rxbuf[14] << 8) | rxbuf[15]); + mb = ((rxbuf[16] << 8) | rxbuf[17]); + mc = ((rxbuf[18] << 8) | rxbuf[19]); + md = ((rxbuf[20] << 8) | rxbuf[21]); + } + + return msg; +} + +/** + * @brief Calcul the true temperature. + * + * @param[in] ut uncompensated temperature + * @param[out] ctp pointer of the compensated temperature + */ +static void calcul_t(int32_t ut, float *ctp) { + + int32_t x1, x2; + + /* Converting the temperature value. */ + x1 = ((ut - ac6) * ac5) >> 15; + x2 = (mc << 11) / (x1 + md); + b5 = x1 + x2; + *ctp = (float)((b5 + 8) >> 4)*BMP085_T_RES; +} + +/** + * @brief Calcul the true pressure. + * + * @param[in] up uncompensated pressure + * @param[out] cpp pointer of the compensated pressure + */ +static void calcul_p(int32_t up, uint8_t oss, float *cpp) { + + int32_t press; + int32_t x1,x2,x3; + int32_t b3,b6; + uint32_t b4,b7; + + /* Converting the pressure value. */ + b6 = b5 - 4000; + x1 = (b2 * ((b6 * b6) >> 12)) >> 11; + x2 = (ac2 * b6) >> 11; + x3 = x1 + x2; + b3 = ((((int32_t)ac1 * 4 + x3) << oss) + 2) >> 2; + x1 = ((ac3)*b6) >> 13; + x2 = (b1 * (b6*b6 >> 12)) >> 16; + x3 = ((x1 + x2) + 2) >> 2; + b4 = ac4 * (uint32_t)(x3 + 32768) >> 15; + b7 = ((uint32_t)up - b3)*(50000 >> oss); + + if (b7 < 0x80000000) + press = (b7*2)/b4; + else + press = (b7/b4)*2; + + x1 = (press >> 8)*(press >> 8); + x1 = (x1*3038) >> 16; + x2 = (-7357*press) >> 16; + *cpp =(float)((press + ((x1 + x2 + 3791) >> 4))*BMP085_P_RES); +} + +/** + * @brief Start temperature measurement. + * + * @param[in] devp pointer to the BMP085 device driver + * + * @return the operation status + */ +static msg_t start_t_measurement(BMP085Driver *devp) { + + uint8_t txbuf[2] = {BMP085_AD_CR, BMP085_CR_T_VAL}; + + if ((devp)->config->thermocfg != NULL) { + i2cAcquireBus(devp->config->i2cp); + msg_t msg = bmp085I2CWriteRegister(devp->config->i2cp, txbuf, 2); + i2cReleaseBus(devp->config->i2cp); + + /* Conversion time for the temperature. */ + chThdSleepMilliseconds(BMP085_THERMO_CT_LOW); + + return msg; + } + else + return MSG_RESET; +} + +/** + * @brief Start the pressure measurment. + * + * @param[in] devp pointer to the BMP085 driver + * @return msg the operation status + */ +static msg_t start_p_measurement(BMP085Driver *devp) { + + uint8_t oss, delay; + uint8_t txbuf[2]; + + oss = devp->config->barocfg->oss; + txbuf[0] = BMP085_AD_CR; + + /* Check the oss according the bmp085 mode. */ + if (oss == BMP085_BARO_OSS_0) { + txbuf[1] = BMP085_CR_P_VAL0 + (oss << 6); + delay = BMP085_BARO_CT_LOW; + } + else if (oss == BMP085_BARO_OSS_1) { + txbuf[1] = BMP085_CR_P_VAL1 + (oss << 6); + delay = BMP085_BARO_CT_STD; + } + else if (oss == BMP085_BARO_OSS_2) { + txbuf[1] = BMP085_CR_P_VAL2 + (oss << 6); + delay = BMP085_BARO_CT_HR; + } + else { + txbuf[1] = BMP085_CR_P_VAL3 + (oss << 6); + delay = BMP085_BARO_CT_LUHR; + } + + /* Start the sensor for sampling. */ +#if BMP085_SHARED_I2C + i2cAcquireBus(devp->config->i2cp); +#endif /* BMP085_SHARED_I2C */ + + msg_t msg = bmp085I2CWriteRegister(devp->config->i2cp, txbuf, 2); + +#if BMP085_SHARED_I2C + i2cReleaseBus(devp->config->i2cp); +#endif /* BMP085_SHARED_I2C */ + + /* Conversion time for the pressure, max time for the moment. */ + chThdSleepMilliseconds(delay); + + return msg; +} + +/** + * @brief Read the uncompensated temperature from the BMP085 register. + * + * @param[in] devp pointer to the BMP085 driver + * @param[out] utemp uncompensated temperature read from the sensor register + * + * @return msg the operation status + */ +msg_t acquire_ut(BMP085Driver *devp, int32_t *utemp) { + + uint8_t rxbuf[2]; + msg_t msg; + + /* Start the temperature measurement. */ + start_t_measurement(devp); + + /* Start the sensor for sampling. */ +#if BMP085_SHARED_I2C + i2cAcquireBus(devp->config->i2cp); +#endif /* BMP085_SHARED_I2C */ + + /* Get the temperature. */ + msg = bmp085I2CReadRegister(devp->config->i2cp, BMP085_AD_T_DR_MSB, rxbuf, + 2); + +#if BMP085_SHARED_I2C + i2cReleaseBus(devp->config->i2cp); +#endif /* BMP085_SHARED_I2C */ + + if(msg == MSG_OK){ + /* Building the uncompensated temperature value. */ + *utemp = (int32_t)((rxbuf[0] << 8) | rxbuf[1]); + } + + return msg; +} + +/** + * @brief Read the uncompensated pressure from the BMP085 register. + * + * @param[in] devp pointer to the BMP085 driver + * @param[out] upress uncompensated pressure read from the sensor register + * + * @return msg the operation status + */ +msg_t acquire_up(BMP085Driver *devp, int32_t *upress) { + + uint8_t rxbuf[3]; + uint8_t oss; + msg_t msg; + + /* Get the oversampling setting from the driver configuratioin. */ + oss = devp->config->barocfg->oss; + + /* Start the pressure measurement. */ + start_p_measurement(devp); + + /* Start the sensor for sampling. */ +#if BMP085_SHARED_I2C + i2cAcquireBus(devp->config->i2cp); +#endif /* BMP085_SHARED_I2C */ + + /* Get the pressure */ + msg = bmp085I2CReadRegister(devp->config->i2cp, BMP085_AD_P_DR_MSB, rxbuf, + 3); + +#if BMP085_SHARED_I2C + i2cReleaseBus(devp->config->i2cp); +#endif /* BMP085_SHARED_I2C */ + + if (msg == MSG_OK) { + /* Building the uncompensated pressure value. */ + *upress = (int32_t)((rxbuf[0] << 16)|(rxbuf[1] << 8)|rxbuf[2]); + *upress = *upress >> (8-oss); + } + + return msg; +} + +/*==========================================================================*/ +/* Interface implementation. */ +/*==========================================================================*/ + +/** + * @brief Get the barometer number of axes. + * + * @param[in] ip interface pointer of the BMP085 sensor + * + * @return barometer number of axes + */ +static size_t baro_get_axes_number(void *ip) { + + osalDbgCheck(ip != NULL); + + return BMP085_BARO_NUMBER_OF_AXES; +} + +/** + * @brief Get the thermometer number of axes. + * + * @param[in] ip interface pointer of the BMP085 sensor + * + * @return thermometer number of axes + */ +static size_t thermo_get_axes_number(void *ip) { + + osalDbgCheck(ip != NULL); + + return BMP085_THERMO_NUMBER_OF_AXES; +} + +/** + * @brief Get the sensor number of axes. + * + * @param[in] ip interface pointer of the BMP085 sensor + * + * @return sensor number of axes + */ +static size_t sens_get_axes_number(void *ip) { + + osalDbgCheck(ip != NULL); + + return (baro_get_axes_number(ip) + thermo_get_axes_number(ip)); +} + +/** + * @brief Read baromether raw data. + * + * @param[in] ip interface pointer of the sensor + * @param[in] axes buffer for various axes data + * + * @return msg the result of the reading operation + */ +static msg_t baro_read_raw(void *ip, int32_t axes[]) { + + osalDbgCheck((ip != NULL) && (axes != NULL)); + osalDbgAssert((((BMP085Driver *)ip)->state == BMP085_READY), + "baro_read_raw(), invalid state"); + +#if BMP085_USE_I2C + osalDbgAssert((((BMP085Driver *)ip)->config->i2cp->state == I2C_READY), + "baro_read_raw(), channel not ready"); +#if BMP085_SHARED_I2C + i2cAcquireBus(((BMP085Driver *)ip)->config->i2cp); + i2cStart(((BMP085Driver *)ip)->config->i2cp, + ((BMP085Driver *)ip)->config->i2ccfg); +#endif /* BMP085_SHARED_I2C. */ + + /* Measure the uncompensated pressure. */ + msg_t msg = acquire_up(((BMP085Driver *)ip), axes); + +#if BMP085_SHARED_I2C + i2cReleaseBus(((BMP085Driver *)ip)->config->i2cp); +#endif /* BMP085_SHARED_I2C. */ +#endif /* BMP085_USE_I2C. */ + + return msg; +} + +/** + * @brief Read thermometer raw data. + * + * @param[in] ip interface pointer of the BMP085 sensor + * @param[in] axes buffer for various axes data + * + * @return msg the result of the reading operation + */ +static msg_t thermo_read_raw(void *ip, int32_t axes[]) { + + osalDbgCheck((ip != NULL) && (axes != NULL)); + osalDbgAssert((((BMP085Driver *)ip)->state == BMP085_READY), + "thermo_read_raw(), invalid state"); + +#if BMP085_USE_I2C + osalDbgAssert((((BMP085Driver *)ip)->config->i2cp->state == I2C_READY), + "thermo_read_raw(), channel not ready"); +#if BMP085_SHARED_I2C + i2cAcquireBus(((BMP085Driver *)ip)->config->i2cp); + i2cStart(((BMP085Driver *)ip)->config->i2cp, + ((BMP085Driver *)ip)->config->i2ccfg); +#endif /* BMP085_SHARED_I2C. */ + + /* Measure the uncompensated temperature. */ + msg_t msg = acquire_ut(((BMP085Driver *)ip), axes); + +#if BMP085_SHARED_I2C + i2cReleaseBus(((LSM303DLHCDriver *)ip)->config->i2cp); +#endif /* BMP085_SHARED_I2C. */ +#endif /* BMP085_USE_I2C. */ + + return msg; +} + +/** + * @brief Read BMP085 sensor raw data. + * + * @param[in] ip interface pointer of the BMP085 sensor + * @param[in] axes buffer for various axes data + * + * @return msg the result of the reading operation + */ +static msg_t sens_read_raw(void *ip, int32_t axes[]) { + + int32_t* bp = axes; + msg_t msg; + + if (((BMP085Driver *)ip)->config->barocfg != NULL) { + msg = baro_read_raw(ip, bp); + + if (msg != MSG_OK) + return msg; + + bp += BMP085_BARO_NUMBER_OF_AXES; + } + + if (((BMP085Driver *)ip)->config->thermocfg != NULL) { + msg = thermo_read_raw(ip, bp); + } + + return msg; +} + +/** + * @brief Read barometer cooked data. + * + * @param[in] ip interface pointer of the BMP085 sensor + * @param[in] axes buffer for various axes data + * + * @return msg the result of the reading operation + */ +static msg_t baro_read_cooked(void *ip, float axes[]) { + + uint32_t i; + int32_t raw[BMP085_BARO_NUMBER_OF_AXES]; + msg_t msg; + uint8_t oss; + + osalDbgCheck((ip != NULL) && (axes != NULL)); + osalDbgAssert((((BMP085Driver *)ip)->state == BMP085_READY), + "baro_read_cooked(), invalid state"); + + msg = baro_read_raw(ip, raw); + oss = ((BMP085Driver *)ip)->config->barocfg->oss; + + for (i = 0; i < BMP085_BARO_NUMBER_OF_AXES; i++) + calcul_p(raw[i], oss, &axes[i]); + + return msg; +} + +/** + * @brief Read thermometer cooked data. + * + * @param[in] ip interface pointer of the BMP085 sensor + * @param[in] axes buffer for various axes data + * + * @return msg the result of the reading operation + */ +static msg_t thermo_read_cooked(void *ip, float axes[]) { + + uint32_t i; + int32_t raw[BMP085_THERMO_NUMBER_OF_AXES]; + msg_t msg; + + osalDbgCheck(((ip != NULL) && (axes != NULL))); + osalDbgAssert((((BMP085Driver *)ip)->state == BMP085_READY), + "thermo_read_cooked(), invalid state"); + msg = thermo_read_raw(ip, raw); + + for (i = 0; i < BMP085_THERMO_NUMBER_OF_AXES; i++) + calcul_t(raw[i], &axes[i]); + + return msg; +} + +/** + * @brief Read BMP085 sensor cooked data. + * + * @param[in] ip interface pointer of the BMP085 sensor + * @param[in] axes buffer for various axes data + * + * @return msg the result of the reading operation + */ +static msg_t sens_read_cooked(void *ip, float axes[]) { + + float* bp = axes; + msg_t msg; + + if (((BMP085Driver *)ip)->config->barocfg != NULL) { + msg = baro_read_cooked(ip, bp); + + if (msg != MSG_OK) + return msg; + + bp += BMP085_BARO_NUMBER_OF_AXES; + } + + if (((BMP085Driver *)ip)->config->thermocfg != NULL) + msg = thermo_read_cooked(ip, bp); + + return msg; +} + +/** + * @brief Set the barometer bias. + * + * @param[in] ip interface pointer of the BMP085 sensor + * @param[in] bp pointer to the bias value + * + * @return msg the result of the setting operation + */ +static msg_t baro_set_bias(void *ip, float *bp) { + + osalDbgCheck((ip != NULL) && (bp !=NULL)); + osalDbgAssert((((BMP085Driver *)ip)->state == BMP085_READY) || + (((BMP085Driver *)ip)->state == BMP085_STOP), + "baro_set_bias(), invalid state"); + return MSG_OK; +} + +/** + * @brief Set the thermometer bias. + * + * @param[in] ip interface pointer of the BMP085 sensor + * @param[in] bp pointer to the bias value + * + * @return msg the result of the setting operation + */ +static msg_t thermo_set_bias(void *ip, float *bp) { + + osalDbgCheck((ip != NULL) && (bp !=NULL)); + osalDbgAssert((((BMP085Driver *)ip)->state == BMP085_READY) || + (((BMP085Driver *)ip)->state == BMP085_STOP), + "thermo_set_bias(), invalid state"); + return MSG_OK; +} + +/** + * @brief Reset the barometer bias. + * + * @param[in] ip interface pointer of the BMP085 sensor + * + * @return msg the result of the reset operation + */ +static msg_t baro_reset_bias(void *ip) { + + osalDbgCheck(ip != NULL); + osalDbgAssert((((BMP085Driver *)ip)->state == BMP085_READY) || + (((BMP085Driver *)ip)->state == BMP085_STOP), + "baro_reset_bias(), invalid state"); + + return MSG_OK; +} + +/** + * @brief Reset the thermometer bias. + * + * @param[in] ip interface pointer of the BMP085 sensor + * + * @return msg the result of the reset operation + */ +static msg_t thermo_reset_bias(void *ip) { + + osalDbgCheck(ip != NULL); + osalDbgAssert((((BMP085Driver *)ip)->state == BMP085_READY) || + (((BMP085Driver *)ip)->state == BMP085_STOP), + "thermo_reset_bias(), invalid state"); + + return MSG_OK; +} + +/** + * @brief Set the barometer sensivity. + * + * @param[in] ip interface pointer of the BMP085 sensor + * @param[in] sp pointer to the sensivity value + * + * @return msg the result of the setting operation + */ +static msg_t baro_set_sensivity(void *ip, float *sp) { + + osalDbgCheck((ip != NULL) && (sp !=NULL)); + osalDbgAssert((((BMP085Driver *)ip)->state == BMP085_READY), + "baro_set_sensivity(), invalid state"); + + return MSG_OK; +} + +/** + * @brief Set the thermometer sensivity. + * + * @param[in] ip interface pointer of the BMP085 sensor + * @param[in] sp pointer to the sensivity value + * + * @return msg the result of the setting operation + */ +static msg_t thermo_set_sensivity(void *ip, float *sp) { + + osalDbgCheck((ip != NULL) && (sp !=NULL)); + osalDbgAssert((((BMP085Driver *)ip)->state == BMP085_READY), + "thermo_set_sensivity(), invalid state"); + + return MSG_OK; +} + +/** + * @brief Reset the barometer sensivity. + * + * @param[in] ip interface pointer of the BMP085 sensor + * + * @return msg the result of the reset operation + */ +static msg_t baro_reset_sensivity(void *ip) { + + osalDbgCheck(ip != NULL); + osalDbgAssert((((BMP085Driver *)ip)->state == BMP085_READY), + "baro_reset_sensivity(), invalid state"); + + return MSG_OK; +} + +/** + * @brief Reset the thermometer sensivity. + * + * @param[in] ip interface pointer of the BMP085 sensor + * + * @return msg the result of the reset operation + */ +static msg_t thermo_reset_sensivity(void *ip) { + + osalDbgCheck(ip != NULL); + osalDbgAssert((((BMP085Driver *)ip)->state == BMP085_READY), + "thermo_reset_sensivity(), invalid state"); + + return MSG_OK; +} + +static const struct BaseSensorVMT vmt_basesensor = { + sens_get_axes_number, sens_read_raw, sens_read_cooked +}; + +static const struct BaseBarometerVMT vmt_basebarometer = { + baro_get_axes_number, baro_read_raw, baro_read_cooked, + baro_set_bias, baro_reset_bias, + baro_set_sensivity, baro_reset_sensivity +}; + +static const struct BaseThermometerVMT vmt_basethermometer = { + thermo_get_axes_number, thermo_read_raw, thermo_read_cooked, + thermo_set_bias, thermo_reset_bias, + thermo_set_sensivity, thermo_reset_sensivity +}; + +/*==========================================================================*/ +/* Driver exported functions. */ +/*==========================================================================*/ + +/** + * @brief Initializes an instance. + * + * @param[out] devp pointer to the @p BMP085Driver object + * + * @init + */ +void bmp085ObjectInit(BMP085Driver *devp) { + + devp->vmt_basesensor = &vmt_basesensor; + devp->vmt_basebarometer = &vmt_basebarometer; + devp->vmt_basethermometer = &vmt_basethermometer; + devp->config = NULL; + devp->state = BMP085_STOP; +} + +/** + * @brief Configures and activates BMP085 Complex Driver peripheral. + * + * @param[in] devp pointer to the @p BMP085Driver object + * @param[in] config pointer to the @p BMP085Config object + * + * @api + */ +void bmp085Start(BMP085Driver *devp, const BMP085Config *config) { + + osalDbgCheck((devp != NULL) && (config != NULL)); + osalDbgAssert((devp->state == BMP085_STOP) || + (devp->state == BMP085_READY), + "bmp085cStart(), invalid state"); + devp->config = config; +#if BMP085_USE_I2C +#if BMP085_SHARED_I2C + i2cAcquireBus((devp)->config->i2cp); +#endif /* BMP085_SHARED_I2C. */ + /* Read the Calibrations data. */ + i2cStart((devp)->config->i2cp, (devp)->config->i2ccfg); + bmp085ReadCoefficient(devp, BMP085_AD_CC_AC1_MSB); +#if BMP085_SHARED_I2C + i2cReleaseBus((devp)->config->i2cp); +#endif /* BMP085_SHARED_I2C. */ +#endif /* BMP085_USE_I2C. */ + if(devp->state != BMP085_READY) + devp->state = BMP085_READY; +} + +/** + * @brief Deactivates the BMP085 Complex Driver peripheral. + * + * @param[in] devp pointer to the @p BMP085Driver object + * + * @api + */ +void bmp085Stop(BMP085Driver *devp) { + + osalDbgCheck(devp != NULL); + osalDbgAssert((devp->state == BMP085_STOP) || + (devp->state == BMP085_READY), + "bmp085Stop(), invalid state"); +#if (BMP085_USE_I2C) + if (devp->state == BMP085_STOP) { +#if BMP085_SHARED_I2C + i2cAcquireBus((devp)->config->i2cp); + i2cStart((devp)->config->i2cp, (devp)->config->i2ccfg); +#endif /* BMP085_SHARED_I2C. */ +#if BMP085_SHARED_I2C + i2cReleaseBus((devp)->config->i2cp); +#endif /* BMP085_SHARED_I2C. */ + } +#endif /* BMP085_USE_I2C. */ + if (devp->state != BMP085_STOP) + devp->state = BMP085_STOP; +} +/** @} */ -- cgit v1.2.3