MEMS nano pressure sensor: 260-1260 hPa absolute digital output barometer.
Dependencies: X_NUCLEO_COMMON ST_INTERFACES
Dependents: X_NUCLEO_IKS01A3 X_NUCLEO_IKS01A3
Diff: LPS22HHSensor.cpp
- Revision:
- 0:c761bc6186e8
- Child:
- 1:978cae936ddb
diff -r 000000000000 -r c761bc6186e8 LPS22HHSensor.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/LPS22HHSensor.cpp Wed Mar 06 09:18:20 2019 +0000 @@ -0,0 +1,704 @@ +/** + ****************************************************************************** + * @file LPS22HHSensor.cpp + * @author SRA + * @version V1.0.0 + * @date February 2019 + * @brief Implementation of a LPS22HH pressure sensor. + ****************************************************************************** + * @attention + * + * <h2><center>© COPYRIGHT(c) 2019 STMicroelectronics</center></h2> + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. Neither the name of STMicroelectronics nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER + * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************** + */ + + +/* Includes ------------------------------------------------------------------*/ + +#include "LPS22HHSensor.h" + + +/* Class Implementation ------------------------------------------------------*/ + +/** Constructor + * @param spi object of an helper class which handles the SPI peripheral + * @param cs_pin the chip select pin + * @param int_pin the interrupt pin + * @param spi_type the SPI type + */ +LPS22HHSensor::LPS22HHSensor(SPI *spi, PinName cs_pin, PinName int_pin, SPI_type_t spi_type) : _dev_spi(spi), _cs_pin(cs_pin), _int_irq(int_pin), _spi_type(spi_type) +{ + assert (spi); + if (cs_pin == NC) + { + printf ("ERROR LPS22HH CS MUST NOT BE NC\n\r"); + _dev_spi = NULL; + _dev_i2c = NULL; + return; + } + + _reg_ctx.write_reg = LPS22HH_io_write; + _reg_ctx.read_reg = LPS22HH_io_read; + _reg_ctx.handle = (void *)this; + _cs_pin = 1; + _dev_i2c = NULL; + _address = 0; + + if (_spi_type == SPI3W) + { + /* Enable SPI 3-Wires on the component */ + uint8_t data = 0x01; + lps22hh_write_reg(&_reg_ctx, LPS22HH_CTRL_REG1, &data, 1); + } +} + +/** Constructor + * @param i2c object of an helper class which handles the I2C peripheral + * @param address the address of the component's instance + * @param int_pin the interrupt pin + */ +LPS22HHSensor::LPS22HHSensor(DevI2C *i2c, uint8_t address, PinName int_pin) : _dev_i2c(i2c), _address(address), _cs_pin(NC), _int_irq(int_pin) +{ + assert (i2c); + _dev_spi = NULL; + _reg_ctx.write_reg = LPS22HH_io_write; + _reg_ctx.read_reg = LPS22HH_io_read; + _reg_ctx.handle = (void *)this; +} + + +/** + * @brief Initializing the component + * @param init pointer to device specific initalization structure + * @retval 0 in case of success, an error code otherwise + */ +int LPS22HHSensor::init(void *init) +{ + /* Disable MIPI I3C(SM) interface */ + if (lps22hh_i3c_interface_set(&_reg_ctx, LPS22HH_I3C_DISABLE) != 0) + { + return 1; + } + + /* Power down the device, set Low Noise Enable (bit 5), clear One Shot (bit 4) */ + if (lps22hh_data_rate_set(&_reg_ctx, (lps22hh_odr_t)(LPS22HH_POWER_DOWN | 0x10)) != 0) + { + return 1; + } + + /* Disable low-pass filter on LPS22HH pressure data */ + if (lps22hh_lp_bandwidth_set(&_reg_ctx, LPS22HH_LPF_ODR_DIV_2) != 0) + { + return 1; + } + + /* Set block data update mode */ + if (lps22hh_block_data_update_set(&_reg_ctx, PROPERTY_ENABLE) != 0) + { + return 1; + } + + /* Set autoincrement for multi-byte read/write */ + if (lps22hh_auto_increment_set(&_reg_ctx, PROPERTY_ENABLE) != 0) + { + return 1; + } + + _last_odr = LPS22HH_25_Hz; + _is_enabled = 0; + + return 0; +} + +/** + * @brief Get WHO_AM_I value + * @param id the WHO_AM_I value + * @retval 0 in case of success, an error code otherwise + */ +int LPS22HHSensor::read_id(uint8_t *id) +{ + if (lps22hh_device_id_get(&_reg_ctx, id) != 0) + { + return 1; + } + + return 0; +} + +/** + * @brief Enable the LPS22HH pressure sensor + * @retval 0 in case of success, an error code otherwise + */ +int LPS22HHSensor::enable() +{ + /* Check if the component is already _is_enabled */ + if (_is_enabled == 1U) + { + return 0; + } + + /* Output data rate selection. */ + if (lps22hh_data_rate_set(&_reg_ctx, _last_odr) != 0) + { + return 1; + } + + _is_enabled = 1; + + return 0; +} + +/** + * @brief Disable the LPS22HH pressure sensor + * @retval 0 in case of success, an error code otherwise + */ +int LPS22HHSensor::disable() +{ + /* Check if the component is already disabled */ + if (_is_enabled == 0U) + { + return 0; + } + + /* Get current output data rate. */ + if (lps22hh_data_rate_get(&_reg_ctx, &_last_odr) != 0) + { + return 1; + } + /* Output data rate selection - power down. */ + if (lps22hh_data_rate_set(&_reg_ctx, LPS22HH_POWER_DOWN) != 0) + { + return 1; + } + + + _is_enabled = 0; + + return 0; +} + + +/** + * @brief Get output data rate + * @param odr the output data rate value + * @retval 0 in case of success, an error code otherwise + */ +int LPS22HHSensor::get_odr(float *odr) +{ + int ret = 0; + lps22hh_odr_t odr_low_level; + + if (lps22hh_data_rate_get(&_reg_ctx, &odr_low_level) != 0) + { + return 1; + } + + switch (odr_low_level) + { + case LPS22HH_POWER_DOWN: + *odr = 0.0f; + break; + + case LPS22HH_1_Hz: + *odr = 1.0f; + break; + + case LPS22HH_10_Hz: + *odr = 10.0f; + break; + + case LPS22HH_25_Hz: + *odr = 25.0f; + break; + + case LPS22HH_50_Hz: + *odr = 50.0f; + break; + + case LPS22HH_75_Hz: + *odr = 75.0f; + break; + + case LPS22HH_100_Hz: + *odr = 100.0f; + break; + + case LPS22HH_200_Hz: + *odr = 200.0f; + break; + + default: + ret = 1; + break; + } + + return ret; +} + +/** + * @brief Set the LPS22HH pressure sensor output data rate + * @param odr the output data rate value to be set + * @retval 0 in case of success, an error code otherwise + */ +int LPS22HHSensor::set_odr(float odr) +{ + /* Check if the component is _is_enabled */ + if (_is_enabled == 1U) + { + return set_odr_when_enabled(odr); + } + else + { + return set_odr_when_disabled(odr); + } +} + + +/** + * @brief Set output data rate + * @param odr the output data rate value to be set + * @retval 0 in case of success, an error code otherwise + */ +int LPS22HHSensor::set_odr_when_enabled(float odr) +{ + lps22hh_odr_t new_odr; + + new_odr = (odr <= 1.0f) ? LPS22HH_1_Hz + : (odr <= 10.0f) ? LPS22HH_10_Hz + : (odr <= 25.0f) ? LPS22HH_25_Hz + : (odr <= 50.0f) ? LPS22HH_50_Hz + : (odr <= 75.0f) ? LPS22HH_75_Hz + : (odr <= 100.0f) ? LPS22HH_100_Hz + : LPS22HH_200_Hz; + + if (lps22hh_data_rate_set(&_reg_ctx, new_odr) != 0) + { + return 1; + } + + if (lps22hh_data_rate_get(&_reg_ctx, &_last_odr) != 0) + { + return 1; + } + + return 0; +} + +/** + * @brief Set output data rate when disabled + * @param odr the output data rate value to be set + * @retval 0 in case of success, an error code otherwise + */ +int LPS22HHSensor::set_odr_when_disabled(float odr) +{ + _last_odr = (odr <= 1.0f) ? LPS22HH_1_Hz + : (odr <= 10.0f) ? LPS22HH_10_Hz + : (odr <= 25.0f) ? LPS22HH_25_Hz + : (odr <= 50.0f) ? LPS22HH_50_Hz + : (odr <= 75.0f) ? LPS22HH_75_Hz + : (odr <= 100.0f) ? LPS22HH_100_Hz + : LPS22HH_200_Hz; + + return 0; +} + +/** + * @brief Get the LPS22HH pressure value + * @param value pointer where the pressure value is written + * @retval 0 in case of success, an error code otherwise + */ +int LPS22HHSensor::get_pressure(float *value) +{ + axis1bit32_t data_raw_pressure; + + (void)memset(data_raw_pressure.u8bit, 0x00, sizeof(int32_t)); + if (lps22hh_pressure_raw_get(&_reg_ctx, data_raw_pressure.u8bit) != 0) + { + return 1; + } + + *value = LPS22HH_FROM_LSB_TO_hPa((float)(data_raw_pressure.i32bit)); + + return 0; +} + +/** + * @brief Get the LPS22HH pressure data ready bit value + * @param status the status of data ready bit + * @retval 0 in case of success, an error code otherwise + */ +int LPS22HHSensor::get_press_drdy_status(uint8_t *status) +{ + if (lps22hh_press_flag_data_ready_get(&_reg_ctx, status) != 0) + { + return 1; + } + + return 0; +} + +/** + * @brief Get the LPS22HH temperature value + * @param value pointer where the temperature value is written + * @retval 0 in case of success, an error code otherwise + */ +int LPS22HHSensor::get_temperature(float *value) +{ + axis1bit16_t data_raw_temperature; + + (void)memset(data_raw_temperature.u8bit, 0x00, sizeof(int16_t)); + if (lps22hh_temperature_raw_get(&_reg_ctx, data_raw_temperature.u8bit) != 0) + { + return 1; + } + + *value = LPS22HH_FROM_LSB_TO_degC((float)(data_raw_temperature.i16bit)); + + return 0; +} + +/** + * @brief Get the LPS22HH temperature data ready bit value + * @param status the status of data ready bit + * @retval 0 in case of success, an error code otherwise + */ +int LPS22HHSensor::get_temp_drdy_status(uint8_t *status) +{ + if (lps22hh_temp_flag_data_ready_get(&_reg_ctx, status) != 0) + { + return 1; + } + + return 0; +} + +/** + * @brief Get the LPS22HH register value + * @param reg address to be written + * @param data value to be written + * @retval 0 in case of success, an error code otherwise + */ +int LPS22HHSensor::read_reg(uint8_t reg, uint8_t *data) +{ + if (lps22hh_read_reg(&_reg_ctx, reg, data, 1) != 0) + { + return 1; + } + + return 0; +} + +/** + * @brief Set the LPS22HH register value + * @param reg address to be written + * @param data value to be written + * @retval 0 in case of success, an error code otherwise + */ +int LPS22HHSensor::write_reg(uint8_t reg, uint8_t data) +{ + if (lps22hh_write_reg(&_reg_ctx, reg, &data, 1) != 0) + { + return 1; + } + + return 0; +} + +/** + * @brief Get the LPS22HH FIFO data + * @param press the pointer where FIFO pressure value is stored + * @param temp the pointer where FIFO temperature value is stored + * @retval 0 in case of success, an error code otherwise + */ +int LPS22HHSensor::get_fifo_data(float *press, float *temp) +{ + axis1bit32_t data_raw_pressure; + axis1bit16_t data_raw_temperature; + + (void)memset(data_raw_pressure.u8bit, 0x00, sizeof(int32_t)); + if (lps22hh_fifo_pressure_raw_get(&_reg_ctx, data_raw_pressure.u8bit) != 0) + { + return 1; + } + + *press = LPS22HH_FROM_LSB_TO_hPa((float)(data_raw_pressure.i32bit)); + + (void)memset(data_raw_temperature.u8bit, 0x00, sizeof(int16_t)); + if (lps22hh_fifo_temperature_raw_get(&_reg_ctx, data_raw_temperature.u8bit) != 0) + { + return 1; + } + + *temp = LPS22HH_FROM_LSB_TO_degC((float)(data_raw_temperature.i16bit)); + + return 0; +} + +/** + * @brief Get the LPS22HH FIFO threshold + * @param status the status of FIFO threshold + * @retval 0 in case of success, an error code otherwise + */ +int LPS22HHSensor::get_fifo_fth_status(uint8_t *status) +{ + if (lps22hh_fifo_wtm_flag_get(&_reg_ctx, status) != 0) + { + return 1; + } + + return 0; +} + +/** + * @brief Get the LPS22HH FIFO full status + * @param status the status of FIFO full status + * @retval 0 in case of success, an error code otherwise + */ +int LPS22HHSensor::get_fifo_full_status(uint8_t *status) +{ + if (lps22hh_fifo_full_flag_get(&_reg_ctx, status) != 0) + { + return 1; + } + + return 0; +} + +/** + * @brief Get the LPS22HH FIFO OVR status + * @param status the status of FIFO OVR status + * @retval 0 in case of success, an error code otherwise + */ +int LPS22HHSensor::get_fifo_ovr_status(uint8_t *status) +{ + if (lps22hh_fifo_ovr_flag_get(&_reg_ctx, status) != 0) + { + return 1; + } + + return 0; +} + +/** + * @brief Get the LPS22HH FIFO data level + * @param status the status of FIFO data level + * @retval 0 in case of success, an error code otherwise + */ +int LPS22HHSensor::get_fifo_level(uint8_t *status) +{ + if (lps22hh_fifo_data_level_get(&_reg_ctx, status) != 0) + { + return 1; + } + + return 0; +} + +/** + * @brief Reset the FIFO interrupt + * @param interrupt The FIFO interrupt to be reset; values: 0 = FTH; 1 = FULL; 2 = OVR + * @retval 0 in case of success, an error code otherwise + */ +int LPS22HHSensor::reset_fifo_interrupt(uint8_t interrupt) +{ + switch (interrupt) + { + case 0: + if (lps22hh_fifo_threshold_on_int_set(&_reg_ctx, PROPERTY_DISABLE) != 0) + { + return 1; + } + break; + case 1: + if (lps22hh_fifo_full_on_int_set(&_reg_ctx, PROPERTY_DISABLE) != 0) + { + return 1; + } + break; + case 2: + if (lps22hh_fifo_ovr_on_int_set(&_reg_ctx, PROPERTY_DISABLE) != 0) + { + return 1; + } + break; + default: + return 1; + } + + return 0; +} + +/** + * @brief Set the FIFO interrupt + * @param interrupt The FIFO interrupt to be set; values: 0 = FTH; 1 = FULL; 2 = OVR + * @retval 0 in case of success, an error code otherwise + */ +int LPS22HHSensor::set_fifo_interrupt(uint8_t interrupt) +{ + switch (interrupt) + { + case 0: + if (lps22hh_fifo_threshold_on_int_set(&_reg_ctx, PROPERTY_ENABLE) != 0) + { + return 1; + } + break; + case 1: + if (lps22hh_fifo_full_on_int_set(&_reg_ctx, PROPERTY_ENABLE) != 0) + { + return 1; + } + break; + case 2: + if (lps22hh_fifo_ovr_on_int_set(&_reg_ctx, PROPERTY_ENABLE) != 0) + { + return 1; + } + break; + default: + return 1; + } + + return 0; +} + +/** + * @brief Set the FIFO mode + * @param Mode the FIFO mode to be set + * @retval 0 in case of success, an error code otherwise + */ +int LPS22HHSensor::set_fifo_mode(uint8_t mode) +{ + /* Verify that the passed parameter contains one of the valid values */ + switch ((lps22hh_f_mode_t)mode) + { + case LPS22HH_BYPASS_MODE: + case LPS22HH_FIFO_MODE: + case LPS22HH_STREAM_MODE: + case LPS22HH_STREAM_TO_FIFO_MODE: + case LPS22HH_BYPASS_TO_STREAM_MODE: + case LPS22HH_BYPASS_TO_FIFO_MODE: + break; + default: + return 1; + } + + if (lps22hh_fifo_mode_set(&_reg_ctx, (lps22hh_f_mode_t)mode) != 0) + { + return 1; + } + + return 0; +} + +/** + * @brief Set the LPS22HH FIFO watermark level + * @param watermark the FIFO watermark level to be set + * @retval 0 in case of success, an error code otherwise + */ +int LPS22HHSensor::set_fifo_watermark_level(uint8_t watermark) +{ + if (lps22hh_fifo_watermark_set(&_reg_ctx, watermark) != 0) + { + return 1; + } + + return 0; +} + +/** + * @brief Set the LPS22HH stop on watermark function + * @param stop the state of stop on watermark function + * @retval 0 in case of success, an error code otherwise + */ +int LPS22HHSensor::stop_fifo_on_watermark(uint8_t stop) +{ + if (lps22hh_fifo_stop_on_wtm_set(&_reg_ctx, stop) != 0) + { + return 1; + } + + return 0; +} + +/** + * @brief Set the LPS22HH One Shot Mode + * @retval 0 in case of success, an error code otherwise + */ +int LPS22HHSensor::set_one_shot() +{ + /* Start One Shot Measurement */ + if(lps22hh_data_rate_set(&_reg_ctx, LPS22HH_ONE_SHOOT) != 0) + { + return 1; + } + + return 0; +} + +/** + * @brief Get the LPS22HH One Shot Status + * @param status pointer to the one shot status (1 means measurements available, 0 means measurements not available yet) + * @retval 0 in case of success, an error code otherwise + */ +int LPS22HHSensor::get_one_shot_status(uint8_t *status) +{ + uint8_t p_da; + uint8_t t_da; + + /* Get DataReady for pressure */ + if(lps22hh_press_flag_data_ready_get(&_reg_ctx, &p_da) != 0) + { + return 1; + } + + /* Get DataReady for temperature */ + if(lps22hh_temp_flag_data_ready_get(&_reg_ctx, &t_da) != 0) + { + return 1; + } + + if(p_da && t_da) + { + *status = 1; + } + else + { + *status = 0; + } + + return 0; +} + +int32_t LPS22HH_io_write(void *handle, uint8_t WriteAddr, uint8_t *pBuffer, uint16_t nBytesToWrite) +{ + return ((LPS22HHSensor *)handle)->io_write(pBuffer, WriteAddr, nBytesToWrite); +} + +int32_t LPS22HH_io_read(void *handle, uint8_t ReadAddr, uint8_t *pBuffer, uint16_t nBytesToRead) +{ + return ((LPS22HHSensor *)handle)->io_read(pBuffer, ReadAddr, nBytesToRead); +}