Delete bme680_drv.c
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/*
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* Driver for Bosch Sensortec BME680 digital temperature, humity, pressure and
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* gas sensor connected to I2C or SPI
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*
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* Part of esp-open-rtos [https://github.com/SuperHouse/esp-open-rtos]
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*
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* PLEASE NOTE:
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* Due to the complexity of the sensor output value computation based on many
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* calibration parameters, the original Bosch Sensortec BME680 driver that is
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* released as open source [https://github.com/BoschSensortec/BME680_driver]
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* and integrated for internal use. Please note the license of this part, which
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* is an extended BSD license and can be found in each of that source files.
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*
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* ---------------------------------------------------------------------------
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*
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* The BSD License (3-clause license)
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*
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* Copyright (c) 2017 Gunar Schorcht (https://github.com/gschorcht]
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <string.h>
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#include "bme680_drv.h"
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#include "FreeRTOS.h"
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#include "task.h"
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#include "espressif/esp_common.h"
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#include "espressif/sdk_private.h"
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#ifdef BME680_DEBUG
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#define debug(s, f, ...) printf("%s %s: " s "\n", "BME680", f, ## __VA_ARGS__)
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#else
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#define debug(s, f, ...)
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#endif
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#define error(s, f, ...) printf("%s %s: " s "\n", "BME680", f, ## __VA_ARGS__)
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#define BME680_BG_TASK_PRIORITY 9
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/**
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* Forward declation of internal functions used by embedded Bosch Sensortec BME680 driver.
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*/
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static void bme680_user_delay_ms(uint32_t period);
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static int8_t bme680_user_spi_read(uint8_t dev_id, uint8_t reg_addr, uint8_t *reg_data, uint16_t len);
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static int8_t bme680_user_spi_write(uint8_t dev_id, uint8_t reg_addr, uint8_t *reg_data, uint16_t len);
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static int8_t bme680_user_i2c_read(uint8_t dev_id, uint8_t reg_addr, uint8_t *reg_data, uint16_t len);
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static int8_t bme680_user_i2c_write(uint8_t dev_id, uint8_t reg_addr, uint8_t *reg_data, uint16_t len);
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/**
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* Sensor data structures
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*/
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bme680_sensor_t bme680_sensors[BME680_MAX_SENSORS];
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/** */
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static bool bme680_valid_sensor (uint32_t sensor, const char* function)
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{
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if (sensor < 0 || sensor > BME680_MAX_SENSORS)
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{
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debug("Wrong sensor id %d.", function, sensor);
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return false;
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}
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if (!bme680_sensors[sensor].active)
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{
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debug("Sensor with id %d is not active.", function, sensor);
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return false;
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}
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return true;
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}
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static bool bme680_is_available (uint32_t id)
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{
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struct bme680_dev *dev = &bme680_sensors[id].dev;
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if (!bme680_valid_sensor(id, __FUNCTION__) ||
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bme680_get_regs(BME680_CHIP_ID_ADDR, &dev->chip_id, 1, dev) != BME680_OK)
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{
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return false;
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}
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return true;
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}
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static void bme680_compute_values (uint8_t id, struct bme680_field_data* data)
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{
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if (!bme680_valid_sensor(id, __FUNCTION__) || !data)
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return;
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bme680_value_set_t act;
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bme680_value_set_t avg = bme680_sensors[id].average;
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float w = bme680_sensors[id].average_weight;
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act.temperature = bme680_sensors[id].dev.tph_sett.os_temp ? data->temperature / 100.0f : 0;
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act.pressure = bme680_sensors[id].dev.tph_sett.os_pres ? data->pressure / 100.0f : 0;
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act.humidity = bme680_sensors[id].dev.tph_sett.os_hum ? data->humidity / 1000.0f : 0;
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act.gas = bme680_sensors[id].dev.gas_sett.heatr_dur ? data->gas_resistance : 0;
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if (bme680_sensors[id].average_first_measurement ||
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!bme680_sensors[id].average_computation)
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{
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bme680_sensors[id].average_first_measurement = false;
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avg = act;
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}
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else
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{
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avg.temperature = w * act.temperature + (1-w) * avg.temperature;
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avg.humidity = w * act.humidity + (1-w) * avg.humidity;
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avg.pressure = w * act.pressure + (1-w) * avg.pressure;
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avg.gas = w * act.gas + (1-w) * avg.gas;
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}
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bme680_sensors[id].actual = act;
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bme680_sensors[id].average = avg;
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}
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static void bme680_background_task (void *pvParameters)
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{
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uint32_t id = (uint32_t)pvParameters;
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uint32_t next_time = sdk_system_get_time ();
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while (1)
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{
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debug("%.3f Sensor %d", __FUNCTION__, (double)sdk_system_get_time()*1e-3, id);
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struct bme680_dev* dev = &bme680_sensors[id].dev;
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struct bme680_field_data data;
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uint8_t set_required_settings;
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int8_t rslt = BME680_OK;
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/* Select the power mode */
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/* Must be set before writing the sensor configuration */
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dev->power_mode = BME680_FORCED_MODE;
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debug ("Using oversampling rates: %d %d %d", __FUNCTION__,
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bme680_sensors[id].dev.tph_sett.os_temp,
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bme680_sensors[id].dev.tph_sett.os_pres,
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bme680_sensors[id].dev.tph_sett.os_hum);
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/* Set the required sensor settings needed */
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set_required_settings = BME680_OST_SEL |
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BME680_OSP_SEL |
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BME680_OSH_SEL |
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BME680_FILTER_SEL |
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BME680_GAS_SENSOR_SEL;
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/* Set the desired sensor configuration */
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rslt = bme680_set_sensor_settings(set_required_settings, dev);
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/* Set the power mode to forced mode to trigger one TPHG measurement cycle */
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rslt = bme680_set_sensor_mode(dev);
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/* Get the total measurement duration so as to sleep or wait till the
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* measurement is complete */
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uint16_t meas_period;
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bme680_get_profile_dur(&meas_period, dev);
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vTaskDelay(meas_period/portTICK_PERIOD_MS); /* Delay till the measurement is ready */
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if ((rslt = bme680_get_sensor_data(&data, dev)) == BME680_OK)
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{
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bme680_compute_values(id, &data);
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debug("%d ms: %.2f C, %.2f Percent, %.2f hPa, %.2f Ohm", __FUNCTION__,
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sdk_system_get_time (),
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bme680_sensors[id].actual.temperature,
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bme680_sensors[id].actual.humidity,
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bme680_sensors[id].actual.pressure,
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bme680_sensors[id].actual.gas);
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if (bme680_sensors[id].cb_function)
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bme680_sensors[id].cb_function(id,
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bme680_sensors[id].actual,
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bme680_sensors[id].average);
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}
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else
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error("Could not get data from sensor with id %d", __FUNCTION__,id);
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/* Compute next measurement time as well as remaining cycle time*/
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uint32_t system_time = sdk_system_get_time ();
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uint32_t remaining_time;
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next_time = next_time + bme680_sensors[id].period*1000; // in us
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if (next_time < system_time)
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// in case of timer overflow
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remaining_time = UINT32_MAX - system_time + next_time;
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else
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// normal case
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remaining_time = next_time - system_time;
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/* Delay the background task by the cycle time */
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vTaskDelay(remaining_time/1000/portTICK_PERIOD_MS);
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}
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}
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bool bme680_init_driver()
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{
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for (int id=0; id < BME680_MAX_SENSORS; id++)
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bme680_sensors[id].active = false;
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return true;
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}
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uint32_t bme680_create_sensor(uint8_t bus, uint8_t addr, uint8_t cs)
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{
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static uint32_t id;
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static char bg_task_name[20];
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// search for first free sensor data structure
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for (id=0; id < BME680_MAX_SENSORS; id++)
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{
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debug("id=%d active=%d", __FUNCTION__, id, bme680_sensors[id].active);
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if (!bme680_sensors[id].active)
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break;
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}
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debug("id=%d", __FUNCTION__, id);
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if (id == BME680_MAX_SENSORS)
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{
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debug("No more sensor data structures available.", __FUNCTION__);
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return -1;
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}
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// init sensor data structure
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bme680_sensors[id].bus = bus;
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bme680_sensors[id].addr = addr;
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bme680_sensors[id].period = 1000;
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bme680_sensors[id].average_computation = true;
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bme680_sensors[id].average_first_measurement = true;
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bme680_sensors[id].average_weight = 0.2;
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bme680_sensors[id].cb_function = NULL;
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bme680_sensors[id].bg_task = NULL;
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bme680_sensors[id].dev.dev_id = id;
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if (bme680_sensors[id].addr)
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{
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// I2C interface used
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bme680_sensors[id].addr = addr;
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bme680_sensors[id].dev.intf = BME680_I2C_INTF;
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bme680_sensors[id].dev.read = bme680_user_i2c_read;
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bme680_sensors[id].dev.write = bme680_user_i2c_write;
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bme680_sensors[id].dev.delay_ms = bme680_user_delay_ms;
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}
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else
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{
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// SPI interface used
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bme680_sensors[id].spi_cs_pin = cs;
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bme680_sensors[id].dev.intf = BME680_SPI_INTF;
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bme680_sensors[id].dev.read = bme680_user_spi_read;
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bme680_sensors[id].dev.write = bme680_user_spi_write;
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bme680_sensors[id].dev.delay_ms = bme680_user_delay_ms;
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gpio_enable(bme680_sensors[id].spi_cs_pin, GPIO_OUTPUT);
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gpio_write (bme680_sensors[id].spi_cs_pin, true);
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}
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// initialize embedded Bosch Sensortec driver
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if (bme680_init(&bme680_sensors[id].dev))
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{
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error("Could not initialize the sensor device with id %d", __FUNCTION__, id);
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return -1;
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}
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bme680_sensors[id].active = true;
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/* Set the default temperature, pressure and humidity settings */
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bme680_set_oversampling_rates (id, os_1x, os_1x, os_1x);
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bme680_set_filter_size (id, iir_size_3);
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/* Set heater default profile 320 degree Celcius for 150 ms */
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bme680_set_heater_profile (id, 320, 150);
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// check whether sensor is available
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if (!bme680_is_available(id))
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{
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debug("Sensor with id %d is not available", __FUNCTION__, id);
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bme680_sensors[id].active = false;
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return -1;
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}
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snprintf (bg_task_name, 20, "bme680_bg_task_%d", id);
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if (xTaskCreate (bme680_background_task, bg_task_name, 256, (void*)id,
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BME680_BG_TASK_PRIORITY,
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&bme680_sensors[id].bg_task) != pdPASS)
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{
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vTaskDelete(bme680_sensors[id].bg_task);
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error("Could not create the background task %s for sensor with id %d\n",
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__FUNCTION__, bg_task_name, id);
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bme680_sensors[id].active = false;
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return false;
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}
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return id;
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}
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bool bme680_delete_sensor(uint32_t sensor)
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{
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if (!bme680_valid_sensor(sensor, __FUNCTION__))
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return false;
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bme680_sensors[sensor].active = false;
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if (bme680_sensors[sensor].bg_task)
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vTaskDelete(bme680_sensors[sensor].bg_task);
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return true;
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}
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bool bme680_set_measurement_period (uint32_t sensor, uint32_t period)
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{
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if (!bme680_valid_sensor(sensor, __FUNCTION__))
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return false;
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if (period < 20)
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error("Period of %d ms is less than the minimum "
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"period of 20 ms for sensor with id %d.",
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__FUNCTION__, period, sensor);
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bme680_sensors[sensor].period = period;
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return true;
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}
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bool bme680_set_callback_function (uint32_t sensor, bme680_cb_function_t bme680_user_function)
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{
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if (!bme680_valid_sensor(sensor, __FUNCTION__))
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return false;
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bme680_sensors[sensor].cb_function = bme680_user_function;
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debug("Set callback function done.", __FUNCTION__);
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return false;
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}
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bool bme680_get_values(uint32_t sensor, bme680_value_set_t *actual, bme680_value_set_t *average)
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{
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if (!bme680_valid_sensor(sensor, __FUNCTION__))
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return false;
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if (actual) *actual = bme680_sensors[sensor].actual;
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if (average) *average = bme680_sensors[sensor].average;
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return true;
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}
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bool bme680_enable_average_computation (uint32_t sensor, bool enabled)
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{
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if (!bme680_valid_sensor(sensor, __FUNCTION__))
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return false;
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bme680_sensors[sensor].average_computation = enabled;
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bme680_sensors[sensor].average_first_measurement = enabled;
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return true;
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}
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bool bme680_set_average_weight (uint32_t sensor, float weight)
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{
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if (!bme680_valid_sensor(sensor, __FUNCTION__))
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return false;
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bme680_sensors[sensor].average_first_measurement = true;
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bme680_sensors[sensor].average_weight = weight;
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return true;
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}
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bool bme680_set_oversampling_rates (uint32_t sensor,
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bme680_oversampling_t ost,
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bme680_oversampling_t osp,
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bme680_oversampling_t osh)
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{
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if (!bme680_valid_sensor(sensor, __FUNCTION__))
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return false;
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/* Set the temperature, pressure and humidity settings */
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bme680_sensors[sensor].dev.tph_sett.os_temp = ost;
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bme680_sensors[sensor].dev.tph_sett.os_pres = osp;
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bme680_sensors[sensor].dev.tph_sett.os_hum = osh;
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debug ("Setting oversampling rates done: osrt=%d osp=%d osrh=%d", __FUNCTION__,
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bme680_sensors[sensor].dev.tph_sett.os_temp,
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bme680_sensors[sensor].dev.tph_sett.os_pres,
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bme680_sensors[sensor].dev.tph_sett.os_hum);
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bme680_sensors[sensor].average_first_measurement = true;
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return true;
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}
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bool bme680_set_heater_profile (uint32_t sensor, uint16_t temperature, uint16_t duration)
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{
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if (!bme680_valid_sensor(sensor, __FUNCTION__))
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return false;
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/* Set the temperature, pressure and humidity settings */
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bme680_sensors[sensor].dev.gas_sett.heatr_temp = temperature; /* degree Celsius */
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bme680_sensors[sensor].dev.gas_sett.heatr_dur = duration; /* milliseconds */
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debug ("Setting heater profile done: temperature=%d duration=%d", __FUNCTION__,
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bme680_sensors[sensor].dev.gas_sett.heatr_temp,
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bme680_sensors[sensor].dev.gas_sett.heatr_dur);
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/* Set the remaining default gas sensor settings and link the heating profile */
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if (temperature == 0 || duration == 0)
|
||||
bme680_sensors[sensor].dev.gas_sett.run_gas = BME680_DISABLE_GAS_MEAS;
|
||||
else
|
||||
bme680_sensors[sensor].dev.gas_sett.run_gas = BME680_ENABLE_GAS_MEAS;
|
||||
|
||||
bme680_sensors[sensor].average_first_measurement = true;
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
|
||||
bool bme680_set_filter_size(uint32_t sensor, bme680_filter_size_t size)
|
||||
{
|
||||
if (!bme680_valid_sensor(sensor, __FUNCTION__))
|
||||
return false;
|
||||
|
||||
/* Set the temperature, pressure and humidity settings */
|
||||
bme680_sensors[sensor].dev.tph_sett.filter = size;
|
||||
|
||||
debug ("Setting filter size done: size=%d", __FUNCTION__,
|
||||
bme680_sensors[sensor].dev.tph_sett.filter);
|
||||
|
||||
bme680_sensors[sensor].average_first_measurement = true;
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Internal functions used by embedded Bosch Sensortec BME680 driver.
|
||||
*/
|
||||
|
||||
static void bme680_user_delay_ms(uint32_t period)
|
||||
{
|
||||
/*
|
||||
* Return control or wait,
|
||||
* for a period amount of milliseconds
|
||||
*/
|
||||
|
||||
vTaskDelay(period / portTICK_PERIOD_MS);
|
||||
}
|
||||
|
||||
#define BME680_SPI_BUF_SIZE 64 // SPI register data buffer size of ESP866
|
||||
|
||||
static const spi_settings_t bus_settings = {
|
||||
.mode = SPI_MODE0,
|
||||
.freq_divider = SPI_FREQ_DIV_10M,
|
||||
.msb = true,
|
||||
.minimal_pins = true,
|
||||
.endianness = SPI_LITTLE_ENDIAN
|
||||
};
|
||||
|
||||
|
||||
static int8_t bme680_user_spi_read(uint8_t dev_id, uint8_t reg_addr, uint8_t *reg_data, uint16_t len)
|
||||
{
|
||||
/*
|
||||
* The parameter dev_id can be used as a variable to select which Chip Select pin has
|
||||
* to be set low to activate the relevant device on the SPI bus
|
||||
*/
|
||||
|
||||
/*
|
||||
* Data on the bus should be like
|
||||
* |----------------+---------------------+-------------|
|
||||
* | MOSI | MISO | Chip Select |
|
||||
* |----------------+---------------------|-------------|
|
||||
* | (don't care) | (don't care) | HIGH |
|
||||
* | (reg_addr) | (don't care) | LOW |
|
||||
* | (don't care) | (reg_data[0]) | LOW |
|
||||
* | (....) | (....) | LOW |
|
||||
* | (don't care) | (reg_data[len - 1]) | LOW |
|
||||
* | (don't care) | (don't care) | HIGH |
|
||||
* |----------------+---------------------|-------------|
|
||||
*/
|
||||
|
||||
// debug("dev_id=%d, reg_addr=%0x, len=%d\n", __FUNCTION__, dev_id, reg_addr, len);
|
||||
|
||||
if (len >= BME680_SPI_BUF_SIZE)
|
||||
{
|
||||
error("Error on read from SPI slave on bus 1. Tried to transfer more"
|
||||
"than %d byte in one read operation.", __FUNCTION__, BME680_SPI_BUF_SIZE);
|
||||
return -1;
|
||||
}
|
||||
|
||||
spi_settings_t old_settings;
|
||||
|
||||
static uint8_t mosi[BME680_SPI_BUF_SIZE];
|
||||
static uint8_t miso[BME680_SPI_BUF_SIZE];
|
||||
|
||||
memset (mosi, 0xff, BME680_SPI_BUF_SIZE);
|
||||
memset (miso, 0xff, BME680_SPI_BUF_SIZE);
|
||||
|
||||
mosi[0] = reg_addr;
|
||||
|
||||
uint8_t bus = bme680_sensors[dev_id].bus;
|
||||
uint8_t spi_cs_pin = bme680_sensors[dev_id].spi_cs_pin;
|
||||
|
||||
spi_get_settings(bus, &old_settings);
|
||||
spi_set_settings(bus, &bus_settings);
|
||||
gpio_write(spi_cs_pin, false);
|
||||
|
||||
size_t success = spi_transfer (bus, (const void*)mosi, (void*)miso, len+1, SPI_8BIT);
|
||||
|
||||
gpio_write(spi_cs_pin, true);
|
||||
spi_set_settings(bus, &old_settings);
|
||||
|
||||
if (!success)
|
||||
{
|
||||
error("Could not read data from SPI bus %d", __FUNCTION__, bus);
|
||||
return -1;
|
||||
}
|
||||
|
||||
for (int i=0; i < len; i++)
|
||||
reg_data[i] = miso[i+1];
|
||||
|
||||
# ifdef BME680_DEBUG
|
||||
printf("BME680 %s: Read the following bytes: ", __FUNCTION__);
|
||||
printf("%0x ", reg_addr);
|
||||
for (int i=0; i < len; i++)
|
||||
printf("%0x ", reg_data[i]);
|
||||
printf("\n");
|
||||
# endif
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static int8_t bme680_user_spi_write(uint8_t dev_id, uint8_t reg_addr, uint8_t *reg_data, uint16_t len)
|
||||
{
|
||||
/*
|
||||
* The parameter dev_id can be used as a variable to select which Chip Select pin has
|
||||
* to be set low to activate the relevant device on the SPI bus
|
||||
*/
|
||||
|
||||
/*
|
||||
* Data on the bus should be like
|
||||
* |---------------------+--------------+-------------|
|
||||
* | MOSI | MISO | Chip Select |
|
||||
* |---------------------+--------------|-------------|
|
||||
* | (don't care) | (don't care) | HIGH |
|
||||
* | (reg_addr) | (don't care) | LOW |
|
||||
* | (reg_data[0]) | (don't care) | LOW |
|
||||
* | (....) | (....) | LOW |
|
||||
* | (reg_data[len - 1]) | (don't care) | LOW |
|
||||
* | (don't care) | (don't care) | HIGH |
|
||||
* |---------------------+--------------|-------------|
|
||||
*/
|
||||
|
||||
static uint8_t mosi[BME680_SPI_BUF_SIZE];
|
||||
|
||||
if (len >= BME680_SPI_BUF_SIZE)
|
||||
{
|
||||
error("Error on write to SPI slave on bus 1. Tried to transfer more"
|
||||
"than %d byte in one write operation.", __FUNCTION__, BME680_SPI_BUF_SIZE);
|
||||
return -1;
|
||||
}
|
||||
|
||||
mosi[0] = reg_addr;
|
||||
|
||||
for (int i = 0; i < len; i++)
|
||||
mosi[i+1] = reg_data[i];
|
||||
|
||||
# ifdef BME680_DEBUG
|
||||
printf("BME680 %s: Write the following bytes: ", __FUNCTION__);
|
||||
for (int i = 0; i < len+1; i++)
|
||||
printf("%0x ", mosi[i]);
|
||||
printf("\n");
|
||||
# endif
|
||||
|
||||
spi_settings_t old_settings;
|
||||
|
||||
uint8_t bus = bme680_sensors[dev_id].bus;
|
||||
uint8_t spi_cs_pin = bme680_sensors[dev_id].spi_cs_pin;
|
||||
|
||||
spi_get_settings(bus, &old_settings);
|
||||
spi_set_settings(bus, &bus_settings);
|
||||
gpio_write(spi_cs_pin, false);
|
||||
|
||||
size_t success = spi_transfer (bus, (const void*)mosi, NULL, len+1, SPI_8BIT);
|
||||
|
||||
gpio_write(spi_cs_pin, true);
|
||||
spi_set_settings(bus, &old_settings);
|
||||
|
||||
if (!success)
|
||||
{
|
||||
error("Could not write data to SPI bus %d", __FUNCTION__, bus);
|
||||
return -1;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int8_t bme680_user_i2c_read(uint8_t dev_id, uint8_t reg_addr, uint8_t *reg_data, uint16_t len)
|
||||
{
|
||||
/*
|
||||
* The parameter dev_id can be used as a variable to store the I2C address of the device
|
||||
*/
|
||||
|
||||
/*
|
||||
* Data on the bus should be like
|
||||
* |------------+---------------------|
|
||||
* | I2C action | Data |
|
||||
* |------------+---------------------|
|
||||
* | Start | - |
|
||||
* | Write | (reg_addr) |
|
||||
* | Stop | - |
|
||||
* | Start | - |
|
||||
* | Read | (reg_data[0]) |
|
||||
* | Read | (....) |
|
||||
* | Read | (reg_data[len - 1]) |
|
||||
* | Stop | - |
|
||||
* |------------+---------------------|
|
||||
*/
|
||||
|
||||
debug ("Read %d byte from i2c slave on bus %d with addr %0x.",
|
||||
__FUNCTION__, len, bme680_sensors[dev_id].bus, bme680_sensors[dev_id].addr);
|
||||
|
||||
int result = i2c_slave_read(bme680_sensors[dev_id].bus,
|
||||
bme680_sensors[dev_id].addr,
|
||||
®_addr, reg_data, len);
|
||||
|
||||
if (result)
|
||||
{
|
||||
error("Error %d on read %d byte from I2C slave on bus %d with addr %0x.",
|
||||
__FUNCTION__, result, len, bme680_sensors[dev_id].bus, bme680_sensors[dev_id].addr);
|
||||
return result;
|
||||
}
|
||||
|
||||
# ifdef BME680_DEBUG
|
||||
printf("BME680 %s: Read following bytes: ", __FUNCTION__);
|
||||
printf("%0x ", reg_addr);
|
||||
for (int i=0; i < len; i++)
|
||||
printf("%0x ", reg_data[i]);
|
||||
printf("\n");
|
||||
# endif
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
static int8_t bme680_user_i2c_write(uint8_t dev_id, uint8_t reg_addr, uint8_t *reg_data, uint16_t len)
|
||||
{
|
||||
/*
|
||||
* The parameter dev_id can be used as a variable to store the I2C address of the device
|
||||
*/
|
||||
|
||||
/*
|
||||
* Data on the bus should be like
|
||||
* |------------+---------------------|
|
||||
* | I2C action | Data |
|
||||
* |------------+---------------------|
|
||||
* | Start | - |
|
||||
* | Write | (reg_addr) |
|
||||
* | Write | (reg_data[0]) |
|
||||
* | Write | (....) |
|
||||
* | Write | (reg_data[len - 1]) |
|
||||
* | Stop | - |
|
||||
* |------------+---------------------|
|
||||
*/
|
||||
|
||||
debug ("Write %d byte to i2c slave on bus %d with addr %0x.",
|
||||
__FUNCTION__, len, bme680_sensors[dev_id].bus, bme680_sensors[dev_id].addr);
|
||||
|
||||
int result = i2c_slave_write(bme680_sensors[dev_id].bus,
|
||||
bme680_sensors[dev_id].addr,
|
||||
®_addr, reg_data, len);
|
||||
|
||||
if (result)
|
||||
{
|
||||
error("Error %d on write to i2c slave on bus %d with addr %0x.",
|
||||
__FUNCTION__, result, bme680_sensors[dev_id].bus, bme680_sensors[dev_id].addr);
|
||||
return result;
|
||||
}
|
||||
|
||||
# ifdef BME680_DEBUG
|
||||
printf("BME680 %s: Wrote the following bytes: ", __FUNCTION__);
|
||||
printf("%0x ", reg_addr);
|
||||
for (int i=0; i < len; i++)
|
||||
printf("%0x ", reg_data[i]);
|
||||
printf("\n");
|
||||
# endif
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
|
||||
Loading…
Add table
Add a link
Reference in a new issue