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lps22df_reg.c
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lps22df_reg.c
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/**
******************************************************************************
* @file lps22df_reg.c
* @author Sensors Software Solution Team
* @brief LPS22DF driver file
******************************************************************************
* @attention
*
* <h2><center>© Copyright (c) 2020 STMicroelectronics.
* All rights reserved.</center></h2>
*
* This software component is licensed by ST under BSD 3-Clause license,
* the "License"; You may not use this file except in compliance with the
* License. You may obtain a copy of the License at:
* opensource.org/licenses/BSD-3-Clause
*
******************************************************************************
*/
#include "lps22df_reg.h"
/**
* @defgroup LPS22DF
* @brief This file provides a set of functions needed to drive the
* lps22df nano pressure sensor.
* @{
*
*/
/**
* @defgroup Interfaces_Functions
* @brief This section provide a set of functions used to read and
* write a generic register of the device.
* MANDATORY: return 0 -> no Error.
* @{
*
*/
/**
* @brief Read generic device register
*
* @param ctx read / write interface definitions(ptr)
* @param reg register to read
* @param data pointer to buffer that store the data read(ptr)
* @param len number of consecutive register to read
* @retval interface status (MANDATORY: return 0 -> no Error)
*
*/
int32_t __weak lps22df_read_reg(const stmdev_ctx_t *ctx, uint8_t reg, uint8_t *data,
uint16_t len)
{
int32_t ret;
if (ctx == NULL)
{
return -1;
}
ret = ctx->read_reg(ctx->handle, reg, data, len);
return ret;
}
/**
* @brief Write generic device register
*
* @param ctx read / write interface definitions(ptr)
* @param reg register to write
* @param data pointer to data to write in register reg(ptr)
* @param len number of consecutive register to write
* @retval interface status (MANDATORY: return 0 -> no Error)
*
*/
int32_t __weak lps22df_write_reg(const stmdev_ctx_t *ctx, uint8_t reg, uint8_t *data,
uint16_t len)
{
int32_t ret;
if (ctx == NULL)
{
return -1;
}
ret = ctx->write_reg(ctx->handle, reg, data, len);
return ret;
}
/**
* @}
*
*/
/**
* @defgroup Private_functions
* @brief Section collect all the utility functions needed by APIs.
* @{
*
*/
static void bytecpy(uint8_t *target, uint8_t *source)
{
if ((target != NULL) && (source != NULL))
{
*target = *source;
}
}
/**
* @}
*
*/
/**
* @defgroup Sensitivity
* @brief These functions convert raw-data into engineering units.
* @{
*
*/
float_t lps22df_from_lsb_to_hPa(int32_t lsb)
{
return ((float_t)lsb / 1048576.0f); /* 4096.0f * 256 */
}
float_t lps22df_from_lsb_to_celsius(int16_t lsb)
{
return ((float_t)lsb / 100.0f);
}
/**
* @}
*
*/
/**
* @defgroup Basic functions
* @brief This section groups all the functions concerning device basic
* configuration.
* @{
*
*/
/**
* @brief Device "Who am I".[get]
*
* @param ctx communication interface handler.(ptr)
* @param val ID values.(ptr)
* @retval interface status (MANDATORY: return 0 -> no Error)
*
*/
int32_t lps22df_id_get(const stmdev_ctx_t *ctx, lps22df_id_t *val)
{
uint8_t reg;
int32_t ret;
ret = lps22df_read_reg(ctx, LPS22DF_WHO_AM_I, ®, 1);
val->whoami = reg;
return ret;
}
/**
* @brief Configures the bus operating mode.[set]
*
* @param ctx communication interface handler.(ptr)
* @param val configures the bus operating mode.(ptr)
* @retval interface status (MANDATORY: return 0 -> no Error)
*
*/
int32_t lps22df_bus_mode_set(const stmdev_ctx_t *ctx, lps22df_bus_mode_t *val)
{
lps22df_i3c_if_ctrl_t i3c_if_ctrl;
lps22df_if_ctrl_t if_ctrl;
int32_t ret;
ret = lps22df_read_reg(ctx, LPS22DF_IF_CTRL, (uint8_t *)&if_ctrl, 1);
if (ret == 0)
{
if_ctrl.i2c_i3c_dis = ((uint8_t)val->interface & 0x02U) >> 1;
if_ctrl.int_en_i3c = ((uint8_t)val->interface & 0x04U) >> 2;
if_ctrl.sim = ((uint8_t)val->interface & 0x01U);
ret = lps22df_write_reg(ctx, LPS22DF_IF_CTRL, (uint8_t *)&if_ctrl, 1);
}
if (ret == 0)
{
ret = lps22df_read_reg(ctx, LPS22DF_I3C_IF_CTRL,
(uint8_t *)&i3c_if_ctrl, 1);
}
if (ret == 0)
{
i3c_if_ctrl.asf_on = (uint8_t)val->filter & 0x01U;
i3c_if_ctrl.i3c_bus_avb_sel = (uint8_t)val->i3c_ibi_time & 0x03U;
ret = lps22df_write_reg(ctx, LPS22DF_I3C_IF_CTRL,
(uint8_t *)&i3c_if_ctrl, 1);
}
return ret;
}
/**
* @brief Configures the bus operating mode.[set]
*
* @param ctx communication interface handler.(ptr)
* @param val configures the bus operating mode.(ptr)
* @retval interface status (MANDATORY: return 0 -> no Error)
*
*/
int32_t lps22df_bus_mode_get(const stmdev_ctx_t *ctx, lps22df_bus_mode_t *val)
{
lps22df_i3c_if_ctrl_t i3c_if_ctrl;
lps22df_if_ctrl_t if_ctrl;
int32_t ret;
ret = lps22df_read_reg(ctx, LPS22DF_IF_CTRL, (uint8_t *)&if_ctrl, 1);
if (ret == 0)
{
ret = lps22df_read_reg(ctx, LPS22DF_I3C_IF_CTRL,
(uint8_t *)&i3c_if_ctrl, 1);
switch ((if_ctrl.int_en_i3c << 2) | (if_ctrl.i2c_i3c_dis << 1) |
if_ctrl.sim)
{
case LPS22DF_SEL_BY_HW:
val->interface = LPS22DF_SEL_BY_HW;
break;
case LPS22DF_SPI_3W:
val->interface = LPS22DF_SPI_3W;
break;
case LPS22DF_SPI_4W:
val->interface = LPS22DF_SPI_4W;
break;
case LPS22DF_INT_PIN_ON_I3C:
val->interface = LPS22DF_INT_PIN_ON_I3C;
break;
default:
val->interface = LPS22DF_SEL_BY_HW;
break;
}
switch (i3c_if_ctrl.asf_on)
{
case LPS22DF_FILTER_AUTO:
val->filter = LPS22DF_FILTER_AUTO;
break;
case LPS22DF_FILTER_ALWAYS_ON:
val->filter = LPS22DF_FILTER_ALWAYS_ON;
break;
default:
val->filter = LPS22DF_FILTER_AUTO;
break;
}
switch (i3c_if_ctrl.i3c_bus_avb_sel)
{
case LPS22DF_IBI_50us:
val->i3c_ibi_time = LPS22DF_IBI_50us;
break;
case LPS22DF_IBI_2us:
val->i3c_ibi_time = LPS22DF_IBI_2us;
break;
case LPS22DF_IBI_1ms:
val->i3c_ibi_time = LPS22DF_IBI_1ms;
break;
case LPS22DF_IBI_25ms:
val->i3c_ibi_time = LPS22DF_IBI_25ms;
break;
default:
val->i3c_ibi_time = LPS22DF_IBI_50us;
break;
}
}
return ret;
}
/**
* @brief Configures the bus operating mode.[get]
*
* @param ctx communication interface handler.(ptr)
* @param val configures the bus operating mode.(ptr)
* @retval interface status (MANDATORY: return 0 -> no Error)
*
*/
int32_t lps22df_init_set(const stmdev_ctx_t *ctx, lps22df_init_t val)
{
lps22df_ctrl_reg2_t ctrl_reg2;
lps22df_ctrl_reg3_t ctrl_reg3;
lps22df_int_source_t int_src;
lps22df_stat_t status;
uint8_t reg[2], cnt = 0;
int32_t ret;
ret = lps22df_read_reg(ctx, LPS22DF_CTRL_REG2, reg, 2);
if (ret == 0)
{
bytecpy((uint8_t *)&ctrl_reg2, ®[0]);
bytecpy((uint8_t *)&ctrl_reg3, ®[1]);
switch (val)
{
case LPS22DF_BOOT:
ctrl_reg2.boot = PROPERTY_ENABLE;
ret = lps22df_write_reg(ctx, LPS22DF_CTRL_REG2,
(uint8_t *)&ctrl_reg2, 1);
if (ret != 0)
{
break;
}
do
{
ret = lps22df_read_reg(ctx, LPS22DF_INT_SOURCE, (uint8_t *)&int_src, 1);
if (ret != 0)
{
break;
}
/* boot procedure ended correctly */
if (int_src.boot_on == 0U)
{
break;
}
if (ctx->mdelay != NULL)
{
ctx->mdelay(10); /* 10ms of boot time */
}
} while (cnt++ < 5U);
if (cnt >= 5U)
{
ret = -1; /* boot procedure failed */
}
break;
case LPS22DF_RESET:
ctrl_reg2.swreset = PROPERTY_ENABLE;
ret = lps22df_write_reg(ctx, LPS22DF_CTRL_REG2,
(uint8_t *)&ctrl_reg2, 1);
if (ret != 0)
{
break;
}
do
{
ret = lps22df_status_get(ctx, &status);
if (ret != 0)
{
break;
}
/* sw-reset procedure ended correctly */
if (status.sw_reset == 0U)
{
break;
}
if (ctx->mdelay != NULL)
{
ctx->mdelay(1); /* should be 50 us */
}
} while (cnt++ < 5U);
if (cnt >= 5U)
{
ret = -1; /* sw-reset procedure failed */
}
break;
case LPS22DF_DRV_RDY:
ctrl_reg2.bdu = PROPERTY_ENABLE;
ctrl_reg3.if_add_inc = PROPERTY_ENABLE;
bytecpy(®[0], (uint8_t *)&ctrl_reg2);
bytecpy(®[1], (uint8_t *)&ctrl_reg3);
ret = lps22df_write_reg(ctx, LPS22DF_CTRL_REG2, reg, 2);
break;
default:
ctrl_reg2.swreset = PROPERTY_ENABLE;
ret = lps22df_write_reg(ctx, LPS22DF_CTRL_REG2,
(uint8_t *)&ctrl_reg2, 1);
break;
}
}
return ret;
}
/**
* @brief Get the status of the device.[get]
*
* @param ctx communication interface handler.(ptr)
* @param val the status of the device.(ptr)
* @retval interface status (MANDATORY: return 0 -> no Error)
*
*/
int32_t lps22df_status_get(const stmdev_ctx_t *ctx, lps22df_stat_t *val)
{
lps22df_interrupt_cfg_t interrupt_cfg;
lps22df_int_source_t int_source;
lps22df_ctrl_reg2_t ctrl_reg2;
lps22df_status_t status;
int32_t ret;
ret = lps22df_read_reg(ctx, LPS22DF_CTRL_REG2,
(uint8_t *)&ctrl_reg2, 1);
if (ret == 0)
{
ret = lps22df_read_reg(ctx, LPS22DF_INT_SOURCE, (uint8_t *)&int_source, 1);
}
if (ret == 0)
{
ret = lps22df_read_reg(ctx, LPS22DF_STATUS, (uint8_t *)&status, 1);
}
if (ret == 0)
{
ret = lps22df_read_reg(ctx, LPS22DF_INTERRUPT_CFG,
(uint8_t *)&interrupt_cfg, 1);
}
val->sw_reset = ctrl_reg2.swreset;
val->boot = int_source.boot_on;
val->drdy_pres = status.p_da;
val->drdy_temp = status.t_da;
val->ovr_pres = status.p_or;
val->ovr_temp = status.t_or;
val->end_meas = ~ctrl_reg2.oneshot;
val->ref_done = ~interrupt_cfg.autozero;
return ret;
}
/**
* @brief Electrical pin configuration.[set]
*
* @param ctx communication interface handler.(ptr)
* @param val the electrical settings for the configurable pins.(ptr)
* @retval interface status (MANDATORY: return 0 -> no Error)
*
*/
int32_t lps22df_pin_conf_set(const stmdev_ctx_t *ctx, lps22df_pin_conf_t *val)
{
lps22df_ctrl_reg3_t ctrl_reg3;
lps22df_if_ctrl_t if_ctrl;
int32_t ret;
ret = lps22df_read_reg(ctx, LPS22DF_IF_CTRL, (uint8_t *)&if_ctrl, 1);
if (ret == 0)
{
if_ctrl.int_pd_dis = ~val->int_pull_down;
if_ctrl.sdo_pu_en = val->sdo_pull_up;
if_ctrl.sda_pu_en = val->sda_pull_up;
if_ctrl.cs_pu_dis = ~val->cs_pull_up;
ret = lps22df_write_reg(ctx, LPS22DF_IF_CTRL, (uint8_t *)&if_ctrl, 1);
}
if (ret == 0)
{
ret = lps22df_read_reg(ctx, LPS22DF_CTRL_REG3, (uint8_t *)&ctrl_reg3, 1);
}
if (ret == 0)
{
ctrl_reg3.pp_od = ~val->int_push_pull;
ret = lps22df_write_reg(ctx, LPS22DF_CTRL_REG3, (uint8_t *)&ctrl_reg3, 1);
}
return ret;
}
/**
* @brief Electrical pin configuration.[get]
*
* @param ctx communication interface handler.(ptr)
* @param val the electrical settings for the configurable pins.(ptr)
* @retval interface status (MANDATORY: return 0 -> no Error)
*
*/
int32_t lps22df_pin_conf_get(const stmdev_ctx_t *ctx, lps22df_pin_conf_t *val)
{
lps22df_ctrl_reg3_t ctrl_reg3;
lps22df_if_ctrl_t if_ctrl;
int32_t ret;
ret = lps22df_read_reg(ctx, LPS22DF_IF_CTRL, (uint8_t *)&if_ctrl, 1);
if (ret == 0)
{
ret = lps22df_read_reg(ctx, LPS22DF_CTRL_REG3, (uint8_t *)&ctrl_reg3, 1);
}
val->sda_pull_up = if_ctrl.sda_pu_en;
val->cs_pull_up = ~if_ctrl.cs_pu_dis;
val->int_pull_down = ~if_ctrl.int_pd_dis;
val->sdo_pull_up = if_ctrl.sdo_pu_en;
val->int_push_pull = ~ctrl_reg3.pp_od;
return ret;
}
/**
* @brief Get the status of all the interrupt sources.[get]
*
* @param ctx communication interface handler.(ptr)
* @param val the status of all the interrupt sources.(ptr)
* @retval interface status (MANDATORY: return 0 -> no Error)
*
*/
int32_t lps22df_all_sources_get(const stmdev_ctx_t *ctx,
lps22df_all_sources_t *val)
{
lps22df_fifo_status2_t fifo_status2;
lps22df_int_source_t int_source;
lps22df_status_t status;
int32_t ret;
ret = lps22df_read_reg(ctx, LPS22DF_STATUS, (uint8_t *)&status, 1);
if (ret == 0)
{
ret = lps22df_read_reg(ctx, LPS22DF_INT_SOURCE,
(uint8_t *)&int_source, 1);
}
if (ret == 0)
{
ret = lps22df_read_reg(ctx, LPS22DF_FIFO_STATUS2,
(uint8_t *)&fifo_status2, 1);
}
val->drdy_pres = status.p_da;
val->drdy_temp = status.t_da;
val->over_pres = int_source.ph;
val->under_pres = int_source.pl;
val->thrsld_pres = int_source.ia;
val->fifo_full = fifo_status2.fifo_full_ia;
val->fifo_ovr = fifo_status2.fifo_ovr_ia;
val->fifo_th = fifo_status2.fifo_wtm_ia;
return ret;
}
/**
* @brief Sensor conversion parameters selection.[set]
*
* @param ctx communication interface handler.(ptr)
* @param val set the sensor conversion parameters.(ptr)
* @retval interface status (MANDATORY: return 0 -> no Error)
*
*/
int32_t lps22df_mode_set(const stmdev_ctx_t *ctx, lps22df_md_t *val)
{
lps22df_ctrl_reg1_t ctrl_reg1;
lps22df_ctrl_reg2_t ctrl_reg2;
uint8_t reg[2];
int32_t ret;
ret = lps22df_read_reg(ctx, LPS22DF_CTRL_REG1, reg, 2);
if (ret == 0)
{
bytecpy((uint8_t *)&ctrl_reg1, ®[0]);
bytecpy((uint8_t *)&ctrl_reg2, ®[1]);
ctrl_reg1.odr = (uint8_t)val->odr;
ctrl_reg1.avg = (uint8_t)val->avg;
ctrl_reg2.en_lpfp = (uint8_t)val->lpf & 0x01U;
ctrl_reg2.lfpf_cfg = ((uint8_t)val->lpf & 0x02U) >> 2;
bytecpy(®[0], (uint8_t *)&ctrl_reg1);
bytecpy(®[1], (uint8_t *)&ctrl_reg2);
ret = lps22df_write_reg(ctx, LPS22DF_CTRL_REG1, reg, 2);
}
return ret;
}
/**
* @brief Sensor conversion parameters selection.[get]
*
* @param ctx communication interface handler.(ptr)
* @param val get the sensor conversion parameters.(ptr)
* @retval interface status (MANDATORY: return 0 -> no Error)
*
*/
int32_t lps22df_mode_get(const stmdev_ctx_t *ctx, lps22df_md_t *val)
{
lps22df_ctrl_reg1_t ctrl_reg1;
lps22df_ctrl_reg2_t ctrl_reg2;
uint8_t reg[2];
int32_t ret;
ret = lps22df_read_reg(ctx, LPS22DF_CTRL_REG1, reg, 2);
if (ret == 0)
{
bytecpy((uint8_t *)&ctrl_reg1, ®[0]);
bytecpy((uint8_t *)&ctrl_reg2, ®[1]);
switch (ctrl_reg1.odr)
{
case LPS22DF_ONE_SHOT:
val->odr = LPS22DF_ONE_SHOT;
break;
case LPS22DF_1Hz:
val->odr = LPS22DF_1Hz;
break;
case LPS22DF_4Hz:
val->odr = LPS22DF_4Hz;
break;
case LPS22DF_10Hz:
val->odr = LPS22DF_10Hz;
break;
case LPS22DF_25Hz:
val->odr = LPS22DF_25Hz;
break;
case LPS22DF_50Hz:
val->odr = LPS22DF_50Hz;
break;
case LPS22DF_75Hz:
val->odr = LPS22DF_75Hz;
break;
case LPS22DF_100Hz:
val->odr = LPS22DF_100Hz;
break;
case LPS22DF_200Hz:
val->odr = LPS22DF_200Hz;
break;
default:
val->odr = LPS22DF_ONE_SHOT;
break;
}
switch (ctrl_reg1.avg)
{
case LPS22DF_4_AVG:
val->avg = LPS22DF_4_AVG;
break;
case LPS22DF_8_AVG:
val->avg = LPS22DF_8_AVG;
break;
case LPS22DF_16_AVG:
val->avg = LPS22DF_16_AVG;
break;
case LPS22DF_32_AVG:
val->avg = LPS22DF_32_AVG;
break;
case LPS22DF_64_AVG:
val->avg = LPS22DF_64_AVG;
break;
case LPS22DF_128_AVG:
val->avg = LPS22DF_128_AVG;
break;
case LPS22DF_256_AVG:
val->avg = LPS22DF_256_AVG;
break;
case LPS22DF_512_AVG:
val->avg = LPS22DF_512_AVG;
break;
default:
val->avg = LPS22DF_4_AVG;
break;
}
switch ((ctrl_reg2.lfpf_cfg << 2) | ctrl_reg2.en_lpfp)
{
case LPS22DF_LPF_DISABLE:
val->lpf = LPS22DF_LPF_DISABLE;
break;
case LPS22DF_LPF_ODR_DIV_4:
val->lpf = LPS22DF_LPF_ODR_DIV_4;
break;
case LPS22DF_LPF_ODR_DIV_9:
val->lpf = LPS22DF_LPF_ODR_DIV_9;
break;
default:
val->lpf = LPS22DF_LPF_DISABLE;
break;
}
}
return ret;
}
/**
* @brief Software trigger for One-Shot.[get]
*
* @param ctx communication interface handler.(ptr)
* @param md the sensor conversion parameters.(ptr)
* @retval interface status (MANDATORY: return 0 -> no Error)
*
*/
int32_t lps22df_trigger_sw(const stmdev_ctx_t *ctx, lps22df_md_t *md)
{
lps22df_ctrl_reg2_t ctrl_reg2;
int32_t ret = 0;
if (md->odr == LPS22DF_ONE_SHOT)
{
ret = lps22df_read_reg(ctx, LPS22DF_CTRL_REG2, (uint8_t *)&ctrl_reg2, 1);
ctrl_reg2.oneshot = PROPERTY_ENABLE;
if (ret == 0)
{
ret = lps22df_write_reg(ctx, LPS22DF_CTRL_REG2, (uint8_t *)&ctrl_reg2, 1);
}
}
return ret;
}
/**
* @brief Sensor data.[get]
*
* @param ctx communication interface handler.(ptr)
* @param data data retrieved from the sensor.(ptr)
* @retval interface status (MANDATORY: return 0 -> no Error)
*
*/
int32_t lps22df_data_get(const stmdev_ctx_t *ctx, lps22df_data_t *data)
{
uint8_t buff[5];
int32_t ret;
ret = lps22df_read_reg(ctx, LPS22DF_PRESS_OUT_XL, buff, 5);
/* pressure conversion */
data->pressure.raw = (int32_t)buff[2];
data->pressure.raw = (data->pressure.raw * 256) + (int32_t) buff[1];
data->pressure.raw = (data->pressure.raw * 256) + (int32_t) buff[0];
data->pressure.raw = data->pressure.raw * 256;
data->pressure.hpa = lps22df_from_lsb_to_hPa(data->pressure.raw);
/* temperature conversion */
data->heat.raw = (int16_t)buff[4];
data->heat.raw = (data->heat.raw * 256) + (int16_t) buff[3];
data->heat.deg_c = lps22df_from_lsb_to_celsius(data->heat.raw);
return ret;
}
/**
* @brief Pressure output value.[get]
*
* @param ctx read / write interface definitions
* @param buff buffer that stores data read
* @retval interface status (MANDATORY: return 0 -> no Error)
*
*/
int32_t lps22df_pressure_raw_get(const stmdev_ctx_t *ctx, uint32_t *buff)
{
int32_t ret;
uint8_t reg[3];
ret = lps22df_read_reg(ctx, LPS22DF_PRESS_OUT_XL, reg, 3);
*buff = reg[2];
*buff = (*buff * 256U) + reg[1];
*buff = (*buff * 256U) + reg[0];
*buff *= 256U;
return ret;
}
/**
* @brief Temperature output value.[get]
*
* @param ctx read / write interface definitions
* @param buff buffer that stores data read
* @retval interface status (MANDATORY: return 0 -> no Error)
*
*/
int32_t lps22df_temperature_raw_get(const stmdev_ctx_t *ctx, int16_t *buff)
{
int32_t ret;
uint8_t reg[2];
ret = lps22df_read_reg(ctx, LPS22DF_TEMP_OUT_L, reg, 2);
*buff = (int16_t)reg[1];
*buff = (*buff * 256) + (int16_t)reg[0];
return ret;
}
/**
* @}
*
*/
/**
* @defgroup FIFO functions
* @brief This section groups all the functions concerning the
* management of FIFO.
* @{
*
*/
/**
* @brief FIFO operation mode selection.[set]
*
* @param ctx communication interface handler.(ptr)
* @param val set the FIFO operation mode.(ptr)
* @retval interface status (MANDATORY: return 0 -> no Error)
*
*/
int32_t lps22df_fifo_mode_set(const stmdev_ctx_t *ctx, lps22df_fifo_md_t *val)
{
lps22df_fifo_ctrl_t fifo_ctrl;
lps22df_fifo_wtm_t fifo_wtm;
uint8_t reg[2];
int32_t ret;
ret = lps22df_read_reg(ctx, LPS22DF_FIFO_CTRL, reg, 2);
if (ret == 0)
{
bytecpy((uint8_t *)&fifo_ctrl, ®[0]);
bytecpy((uint8_t *)&fifo_wtm, ®[1]);
fifo_ctrl.f_mode = (uint8_t)val->operation & 0x03U;
fifo_ctrl.trig_modes = ((uint8_t)val->operation & 0x04U) >> 2;
if (val->watermark != 0x00U)
{
fifo_ctrl.stop_on_wtm = PROPERTY_ENABLE;
}
else
{
fifo_ctrl.stop_on_wtm = PROPERTY_DISABLE;
}
fifo_wtm.wtm = val->watermark;
bytecpy(®[0], (uint8_t *)&fifo_ctrl);
bytecpy(®[1], (uint8_t *)&fifo_wtm);
ret = lps22df_write_reg(ctx, LPS22DF_FIFO_CTRL, reg, 2);
}
return ret;
}
/**
* @brief FIFO operation mode selection.[get]
*
* @param ctx communication interface handler.(ptr)
* @param val get the FIFO operation mode.(ptr)
* @retval interface status (MANDATORY: return 0 -> no Error)
*
*/
int32_t lps22df_fifo_mode_get(const stmdev_ctx_t *ctx, lps22df_fifo_md_t *val)
{
lps22df_fifo_ctrl_t fifo_ctrl;
lps22df_fifo_wtm_t fifo_wtm;
uint8_t reg[2];
int32_t ret;
ret = lps22df_read_reg(ctx, LPS22DF_FIFO_CTRL, reg, 2);
bytecpy((uint8_t *)&fifo_ctrl, ®[0]);
bytecpy((uint8_t *)&fifo_wtm, ®[1]);
switch ((fifo_ctrl.trig_modes << 2) | fifo_ctrl.f_mode)
{
case LPS22DF_BYPASS:
val->operation = LPS22DF_BYPASS;
break;
case LPS22DF_FIFO:
val->operation = LPS22DF_FIFO;
break;
case LPS22DF_STREAM:
val->operation = LPS22DF_STREAM;
break;
case LPS22DF_STREAM_TO_FIFO:
val->operation = LPS22DF_STREAM_TO_FIFO;
break;
case LPS22DF_BYPASS_TO_STREAM:
val->operation = LPS22DF_BYPASS_TO_STREAM;
break;
case LPS22DF_BYPASS_TO_FIFO:
val->operation = LPS22DF_BYPASS_TO_FIFO;
break;
default:
val->operation = LPS22DF_BYPASS;
break;
}
val->watermark = fifo_wtm.wtm;
return ret;
}
/**
* @brief Get the number of samples stored in FIFO.[get]
*
* @param ctx communication interface handler.(ptr)
* @param val number of samples stored in FIFO.(ptr)
* @retval interface status (MANDATORY: return 0 -> no Error)
*
*/
int32_t lps22df_fifo_level_get(const stmdev_ctx_t *ctx, uint8_t *val)
{
lps22df_fifo_status1_t fifo_status1;
int32_t ret;
ret = lps22df_read_reg(ctx, LPS22DF_FIFO_STATUS1,
(uint8_t *)&fifo_status1, 1);
*val = fifo_status1.fss;
return ret;
}
/**
* @brief Software trigger for One-Shot.[get]
*
* @param ctx communication interface handler.(ptr)
* @param samp number of samples stored in FIFO.(ptr)
* @param data data retrieved from FIFO.(ptr)
* @retval interface status (MANDATORY: return 0 -> no Error)
*
*/
int32_t lps22df_fifo_data_get(const stmdev_ctx_t *ctx, uint8_t samp, lps22df_fifo_data_t *data)
{
uint8_t fifo_data[3];
uint8_t i;
int32_t ret = 0;
for (i = 0U; i < samp; i++)
{
ret = lps22df_read_reg(ctx, LPS22DF_FIFO_DATA_OUT_PRESS_XL, fifo_data, 3);
data[i].raw = (int32_t)fifo_data[2];
data[i].raw = (data[i].raw * 256) + (int32_t)fifo_data[1];
data[i].raw = (data[i].raw * 256) + (int32_t)fifo_data[0];
data[i].raw = (data[i].raw * 256);
data[i].hpa = lps22df_from_lsb_to_hPa(data[i].raw);
}
return ret;
}
/**
* @}
*
*/
/**
* @defgroup Interrupt signals
* @brief This section groups all the functions concerning
* the management of interrupt signals.
* @{
*
*/
/**
* @brief Interrupt pins hardware signal configuration.[set]
*
* @param ctx communication interface handler.(ptr)
* @param val the pins hardware signal settings.(ptr)
* @retval interface status (MANDATORY: return 0 -> no Error)
*
*/
int32_t lps22df_interrupt_mode_set(const stmdev_ctx_t *ctx,
lps22df_int_mode_t *val)
{
lps22df_interrupt_cfg_t interrupt_cfg;
lps22df_ctrl_reg3_t ctrl_reg3;
lps22df_ctrl_reg4_t ctrl_reg4;
uint8_t reg[2];
int32_t ret;
ret = lps22df_read_reg(ctx, LPS22DF_CTRL_REG3, reg, 2);
if (ret == 0)
{
bytecpy((uint8_t *)&ctrl_reg3, ®[0]);
bytecpy((uint8_t *)&ctrl_reg4, ®[1]);
ctrl_reg3.int_h_l = val->active_low;
ctrl_reg4.drdy_pls = ~val->drdy_latched;
bytecpy(®[0], (uint8_t *)&ctrl_reg3);
bytecpy(®[1], (uint8_t *)&ctrl_reg4);
ret = lps22df_write_reg(ctx, LPS22DF_CTRL_REG3, reg, 2);
}
ret += lps22df_read_reg(ctx, LPS22DF_INTERRUPT_CFG,
(uint8_t *)&interrupt_cfg, 1);
if (ret == 0)
{
interrupt_cfg.lir = val->int_latched ;
ret = lps22df_write_reg(ctx, LPS22DF_INTERRUPT_CFG,
(uint8_t *)&interrupt_cfg, 1);
}
return ret;
}
/**
* @brief Interrupt pins hardware signal configuration.[get]
*
* @param ctx communication interface handler.(ptr)
* @param val the pins hardware signal settings.(ptr)
* @retval interface status (MANDATORY: return 0 -> no Error)
*
*/
int32_t lps22df_interrupt_mode_get(const stmdev_ctx_t *ctx,
lps22df_int_mode_t *val)
{
lps22df_interrupt_cfg_t interrupt_cfg;
lps22df_ctrl_reg3_t ctrl_reg3;