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New component: Add support for bmp581 pressure and temperature sensors (#4657)

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kahrendt 2023-08-08 01:05:08 -04:00 committed by GitHub
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@ -49,6 +49,7 @@ esphome/components/ble_client/* @buxtronix
esphome/components/bluetooth_proxy/* @jesserockz
esphome/components/bme680_bsec/* @trvrnrth
esphome/components/bmp3xx/* @martgras
esphome/components/bmp581/* @kahrendt
esphome/components/bp1658cj/* @Cossid
esphome/components/bp5758d/* @Cossid
esphome/components/button/* @esphome/core

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esphome/components/bmp581/__init__.py Normal file
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596
esphome/components/bmp581/bmp581.cpp Normal file
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/*
* Adds support for Bosch's BMP581 high accuracy pressure and temperature sensor
* - Component structure based on ESPHome's BMP3XX component (as of March, 2023)
* - Implementation is easier as the sensor itself automatically compensates pressure for the temperature
* - Temperature and pressure data is converted via simple divison operations in this component
* - IIR filter level can independently be applied to temperature and pressure measurements
* - Bosch's BMP5-Sensor-API was consulted to verify that sensor configuration is done correctly
* - Copyright (c) 2022 Bosch Sensortec Gmbh, SPDX-License-Identifier: BSD-3-Clause
* - This component uses forced power mode only so measurements are synchronized by the host
* - All datasheet page references refer to Bosch Document Number BST-BMP581-DS004-04 (revision number 1.4)
*/
#include "bmp581.h"
#include "esphome/core/log.h"
#include "esphome/core/hal.h"
namespace esphome {
namespace bmp581 {
static const char *const TAG = "bmp581";
static const LogString *oversampling_to_str(Oversampling oversampling) {
switch (oversampling) {
case Oversampling::OVERSAMPLING_NONE:
return LOG_STR("None");
case Oversampling::OVERSAMPLING_X2:
return LOG_STR("2x");
case Oversampling::OVERSAMPLING_X4:
return LOG_STR("4x");
case Oversampling::OVERSAMPLING_X8:
return LOG_STR("8x");
case Oversampling::OVERSAMPLING_X16:
return LOG_STR("16x");
case Oversampling::OVERSAMPLING_X32:
return LOG_STR("32x");
case Oversampling::OVERSAMPLING_X64:
return LOG_STR("64x");
case Oversampling::OVERSAMPLING_X128:
return LOG_STR("128x");
default:
return LOG_STR("");
}
}
static const LogString *iir_filter_to_str(IIRFilter filter) {
switch (filter) {
case IIRFilter::IIR_FILTER_OFF:
return LOG_STR("OFF");
case IIRFilter::IIR_FILTER_2:
return LOG_STR("2x");
case IIRFilter::IIR_FILTER_4:
return LOG_STR("4x");
case IIRFilter::IIR_FILTER_8:
return LOG_STR("8x");
case IIRFilter::IIR_FILTER_16:
return LOG_STR("16x");
case IIRFilter::IIR_FILTER_32:
return LOG_STR("32x");
case IIRFilter::IIR_FILTER_64:
return LOG_STR("64x");
case IIRFilter::IIR_FILTER_128:
return LOG_STR("128x");
default:
return LOG_STR("");
}
}
void BMP581Component::dump_config() {
ESP_LOGCONFIG(TAG, "BMP581:");
switch (this->error_code_) {
case NONE:
break;
case ERROR_COMMUNICATION_FAILED:
ESP_LOGE(TAG, " Communication with BMP581 failed!");
break;
case ERROR_WRONG_CHIP_ID:
ESP_LOGE(TAG, " BMP581 has wrong chip ID - please verify you are using a BMP 581");
break;
case ERROR_SENSOR_RESET:
ESP_LOGE(TAG, " BMP581 failed to reset");
break;
case ERROR_SENSOR_STATUS:
ESP_LOGE(TAG, " BMP581 sensor status failed, there were NVM problems");
break;
case ERROR_PRIME_IIR_FAILED:
ESP_LOGE(TAG, " BMP581's IIR Filter failed to prime with an initial measurement");
break;
default:
ESP_LOGE(TAG, " BMP581 error code %d", (int) this->error_code_);
break;
}
LOG_I2C_DEVICE(this);
LOG_UPDATE_INTERVAL(this);
ESP_LOGCONFIG(TAG, " Measurement conversion time: %ums", this->conversion_time_);
if (this->temperature_sensor_) {
LOG_SENSOR(" ", "Temperature", this->temperature_sensor_);
ESP_LOGCONFIG(TAG, " IIR Filter: %s", LOG_STR_ARG(iir_filter_to_str(this->iir_temperature_level_)));
ESP_LOGCONFIG(TAG, " Oversampling: %s", LOG_STR_ARG(oversampling_to_str(this->temperature_oversampling_)));
}
if (this->pressure_sensor_) {
LOG_SENSOR(" ", "Pressure", this->pressure_sensor_);
ESP_LOGCONFIG(TAG, " IIR Filter: %s", LOG_STR_ARG(iir_filter_to_str(this->iir_pressure_level_)));
ESP_LOGCONFIG(TAG, " Oversampling: %s", LOG_STR_ARG(oversampling_to_str(this->pressure_oversampling_)));
}
}
void BMP581Component::setup() {
/*
* Setup goes through several stages, which follows the post-power-up procedure (page 18 of datasheet) and then sets
* configured options
* 1) Soft reboot
* 2) Verify ASIC chip ID matches BMP581
* 3) Verify sensor status (check if NVM is okay)
* 4) Enable data ready interrupt
* 5) Write oversampling settings and set internal configuration values
* 6) Configure and prime IIR Filter(s), if enabled
*/
this->error_code_ = NONE;
ESP_LOGCONFIG(TAG, "Setting up BMP581...");
////////////////////
// 1) Soft reboot //
////////////////////
// Power-On-Reboot bit is asserted if sensor successfully reset
if (!this->reset_()) {
ESP_LOGE(TAG, "BMP581 failed to reset");
this->error_code_ = ERROR_SENSOR_RESET;
this->mark_failed();
return;
}
///////////////////////////////////////////
// 2) Verify ASIC chip ID matches BMP581 //
///////////////////////////////////////////
uint8_t chip_id;
// read chip id from sensor
if (!this->read_byte(BMP581_CHIP_ID, &chip_id)) {
ESP_LOGE(TAG, "Failed to read chip id");
this->error_code_ = ERROR_COMMUNICATION_FAILED;
this->mark_failed();
return;
}
// verify id
if (chip_id != BMP581_ASIC_ID) {
ESP_LOGE(TAG, "Unknown chip ID, is this a BMP581?");
this->error_code_ = ERROR_WRONG_CHIP_ID;
this->mark_failed();
return;
}
////////////////////////////////////////////////////
// 3) Verify sensor status (check if NVM is okay) //
////////////////////////////////////////////////////
if (!this->read_byte(BMP581_STATUS, &this->status_.reg)) {
ESP_LOGE(TAG, "Failed to read status register");
this->error_code_ = ERROR_COMMUNICATION_FAILED;
this->mark_failed();
return;
}
// verify status_nvm_rdy bit (it is asserted if boot was successful)
if (!(this->status_.bit.status_nvm_rdy)) {
ESP_LOGE(TAG, "NVM not ready after boot");
this->error_code_ = ERROR_SENSOR_STATUS;
this->mark_failed();
return;
}
// verify status_nvm_err bit (it is asserted if an error is detected)
if (this->status_.bit.status_nvm_err) {
ESP_LOGE(TAG, "NVM error detected on boot");
this->error_code_ = ERROR_SENSOR_STATUS;
this->mark_failed();
return;
}
////////////////////////////////////
// 4) Enable data ready interrupt //
////////////////////////////////////
// enable the data ready interrupt source
if (!this->write_interrupt_source_settings_(true)) {
ESP_LOGE(TAG, "Failed to write interrupt source register");
this->error_code_ = ERROR_COMMUNICATION_FAILED;
this->mark_failed();
return;
}
//////////////////////////////////////////////////////////////////////////
// 5) Write oversampling settings and set internal configuration values //
//////////////////////////////////////////////////////////////////////////
// configure pressure readings, if sensor is defined
// otherwise, disable pressure oversampling
if (this->pressure_sensor_) {
this->osr_config_.bit.press_en = true;
} else {
this->pressure_oversampling_ = OVERSAMPLING_NONE;
}
// write oversampling settings
if (!this->write_oversampling_settings_(this->temperature_oversampling_, this->pressure_oversampling_)) {
ESP_LOGE(TAG, "Failed to write oversampling register");
this->error_code_ = ERROR_COMMUNICATION_FAILED;
this->mark_failed();
return;
}
// set output data rate to 4 Hz=0x19 (page 65 of datasheet)
// - ?shouldn't? matter as this component only uses FORCED_MODE - datasheet is ambiguous
// - If in NORMAL_MODE or NONSTOP_MODE, then this would still allow deep standby to save power
// - will be written to BMP581 at next requested measurement
this->odr_config_.bit.odr = 0x19;
///////////////////////////////////////////////////////
/// 6) Configure and prime IIR Filter(s), if enabled //
///////////////////////////////////////////////////////
if ((this->iir_temperature_level_ != IIR_FILTER_OFF) || (this->iir_pressure_level_ != IIR_FILTER_OFF)) {
if (!this->write_iir_settings_(this->iir_temperature_level_, this->iir_pressure_level_)) {
ESP_LOGE(TAG, "Failed to write IIR configuration registers");
this->error_code_ = ERROR_COMMUNICATION_FAILED;
this->mark_failed();
return;
}
if (!this->prime_iir_filter_()) {
ESP_LOGE(TAG, "Failed to prime the IIR filter with an intiial measurement");
this->error_code_ = ERROR_PRIME_IIR_FAILED;
this->mark_failed();
return;
}
}
}
void BMP581Component::update() {
/*
* Each update goes through several stages
* 0) Verify either a temperature or pressure sensor is defined before proceeding
* 1) Request a measurement
* 2) Wait for measurement to finish (based on oversampling rates)
* 3) Read data registers for temperature and pressure, if applicable
* 4) Publish measurements to sensor(s), if applicable
*/
////////////////////////////////////////////////////////////////////////////////////
// 0) Verify either a temperature or pressure sensor is defined before proceeding //
////////////////////////////////////////////////////////////////////////////////////
if ((!this->temperature_sensor_) && (!this->pressure_sensor_)) {
return;
}
//////////////////////////////
// 1) Request a measurement //
//////////////////////////////
ESP_LOGVV(TAG, "Requesting a measurement from sensor");
if (!this->start_measurement_()) {
ESP_LOGW(TAG, "Failed to request forced measurement of sensor");
this->status_set_warning();
return;
}
//////////////////////////////////////////////////////////////////////
// 2) Wait for measurement to finish (based on oversampling rates) //
//////////////////////////////////////////////////////////////////////
ESP_LOGVV(TAG, "Measurement is expected to take %d ms to complete", this->conversion_time_);
this->set_timeout("measurement", this->conversion_time_, [this]() {
float temperature = 0.0;
float pressure = 0.0;
////////////////////////////////////////////////////////////////////////
// 3) Read data registers for temperature and pressure, if applicable //
////////////////////////////////////////////////////////////////////////
if (this->pressure_sensor_) {
if (!this->read_temperature_and_pressure_(temperature, pressure)) {
ESP_LOGW(TAG, "Failed to read temperature and pressure measurements, skipping update");
this->status_set_warning();
return;
}
} else {
if (!this->read_temperature_(temperature)) {
ESP_LOGW(TAG, "Failed to read temperature measurement, skipping update");
this->status_set_warning();
return;
}
}
/////////////////////////////////////////////////////////
// 4) Publish measurements to sensor(s), if applicable //
/////////////////////////////////////////////////////////
if (this->temperature_sensor_) {
this->temperature_sensor_->publish_state(temperature);
}
if (this->pressure_sensor_) {
this->pressure_sensor_->publish_state(pressure);
}
this->status_clear_warning();
});
}
bool BMP581Component::check_data_readiness_() {
// - verifies component is not internally in standby mode
// - reads interrupt status register
// - checks if data ready bit is asserted
// - If true, then internally sets component to standby mode if in forced mode
// - returns data readiness state
if (this->odr_config_.bit.pwr_mode == STANDBY_MODE) {
ESP_LOGD(TAG, "Data is not ready, sensor is in standby mode");
return false;
}
uint8_t status;
if (!this->read_byte(BMP581_INT_STATUS, &status)) {
ESP_LOGE(TAG, "Failed to read interrupt status register");
return false;
}
this->int_status_.reg = status;
if (this->int_status_.bit.drdy_data_reg) {
// If in forced mode, then set internal record of the power mode to STANDBY_MODE
// - sensor automatically returns to standby mode after completing a forced measurement
if (this->odr_config_.bit.pwr_mode == FORCED_MODE) {
this->odr_config_.bit.pwr_mode = STANDBY_MODE;
}
return true;
}
return false;
}
bool BMP581Component::prime_iir_filter_() {
// - temporarily disables oversampling for a fast initial measurement; avoids slowing down ESPHome's startup process
// - enables IIR filter flushing with forced measurements
// - forces a measurement; flushing the IIR filter and priming it with a current value
// - disables IIR filter flushing with forced measurements
// - reverts to internally configured oversampling rates
// - returns success of all register writes/priming
// store current internal oversampling settings to revert to after priming
Oversampling current_temperature_oversampling = (Oversampling) this->osr_config_.bit.osr_t;
Oversampling current_pressure_oversampling = (Oversampling) this->osr_config_.bit.osr_p;
// temporarily disables oversampling for temperature and pressure for a fast priming measurement
if (!this->write_oversampling_settings_(OVERSAMPLING_NONE, OVERSAMPLING_NONE)) {
ESP_LOGE(TAG, "Failed to write oversampling register");
return false;
}
// flush the IIR filter with forced measurements (we will only flush once)
this->dsp_config_.bit.iir_flush_forced_en = true;
if (!this->write_byte(BMP581_DSP, this->dsp_config_.reg)) {
ESP_LOGE(TAG, "Failed to write IIR source register");
return false;
}
// forces an intial measurement
// - this measurements flushes the IIR filter reflecting written DSP settings
// - flushing with this initial reading avoids having the internal previous data aquisition being 0, which
// (I)nfinitely affects future values
if (!this->start_measurement_()) {
ESP_LOGE(TAG, "Failed to request a forced measurement");
return false;
}
// wait for priming measurement to complete
// - with oversampling disabled, the conversion time for a single measurement for pressure and temperature is
// ceilf(1.05*(1.0+1.0)) = 3ms
// - see page 12 of datasheet for details
delay(3);
if (!this->check_data_readiness_()) {
ESP_LOGE(TAG, "IIR priming measurement was not ready");
return false;
}
// disable IIR filter flushings on future forced measurements
this->dsp_config_.bit.iir_flush_forced_en = false;
if (!this->write_byte(BMP581_DSP, this->dsp_config_.reg)) {
ESP_LOGE(TAG, "Failed to write IIR source register");
return false;
}
// revert oversampling rates to original settings
return this->write_oversampling_settings_(current_temperature_oversampling, current_pressure_oversampling);
}
bool BMP581Component::read_temperature_(float &temperature) {
// - verifies data is ready to be read
// - reads in 3 bytes of temperature data
// - returns whether successful, where the the variable parameter contains
// - the measured temperature (in degrees Celsius)
if (!this->check_data_readiness_()) {
ESP_LOGW(TAG, "Data from sensor isn't ready, skipping this update");
this->status_set_warning();
return false;
}
uint8_t data[3];
if (!this->read_bytes(BMP581_MEASUREMENT_DATA, &data[0], 3)) {
ESP_LOGW(TAG, "Failed to read sensor's measurement data");
this->status_set_warning();
return false;
}
// temperature MSB is in data[2], LSB is in data[1], XLSB in data[0]
int32_t raw_temp = (int32_t) data[2] << 16 | (int32_t) data[1] << 8 | (int32_t) data[0];
temperature = (float) (raw_temp / 65536.0); // convert measurement to degrees Celsius (page 22 of datasheet)
return true;
}
bool BMP581Component::read_temperature_and_pressure_(float &temperature, float &pressure) {
// - verifies data is ready to be read
// - reads in 6 bytes of temperature data (3 for temeperature, 3 for pressure)
// - returns whether successful, where the variable parameters contain
// - the measured temperature (in degrees Celsius)
// - the measured pressure (in Pa)
if (!this->check_data_readiness_()) {
ESP_LOGW(TAG, "Data from sensor isn't ready, skipping this update");
this->status_set_warning();
return false;
}
uint8_t data[6];
if (!this->read_bytes(BMP581_MEASUREMENT_DATA, &data[0], 6)) {
ESP_LOGW(TAG, "Failed to read sensor's measurement data");
this->status_set_warning();
return false;
}
// temperature MSB is in data[2], LSB is in data[1], XLSB in data[0]
int32_t raw_temp = (int32_t) data[2] << 16 | (int32_t) data[1] << 8 | (int32_t) data[0];
temperature = (float) (raw_temp / 65536.0); // convert measurement to degrees Celsius (page 22 of datasheet)
// pressure MSB is in data[5], LSB is in data[4], XLSB in data[3]
int32_t raw_press = (int32_t) data[5] << 16 | (int32_t) data[4] << 8 | (int32_t) data[3];
pressure = (float) (raw_press / 64.0); // Divide by 2^6=64 for Pa (page 22 of datasheet)
return true;
}
bool BMP581Component::reset_() {
// - writes reset command to the command register
// - waits for sensor to complete reset
// - returns the Power-On-Reboot interrupt status, which is asserted if successful
// writes reset command to BMP's command register
if (!this->write_byte(BMP581_COMMAND, RESET_COMMAND)) {
ESP_LOGE(TAG, "Failed to write reset command");
return false;
}
// t_{soft_res} = 2ms (page 11 of datasheet); time it takes to enter standby mode
// - round up to 3 ms
delay(3);
// read interrupt status register
if (!this->read_byte(BMP581_INT_STATUS, &this->int_status_.reg)) {
ESP_LOGE(TAG, "Failed to read interrupt status register");
return false;
}
// Power-On-Reboot bit is asserted if sensor successfully reset
return this->int_status_.bit.por;
}
bool BMP581Component::start_measurement_() {
// - only pushes the sensor into FORCED_MODE for a reading if already in STANDBY_MODE
// - returns whether a measurement is in progress or has been initiated
if (this->odr_config_.bit.pwr_mode == STANDBY_MODE) {
return this->write_power_mode_(FORCED_MODE);
} else {
return true;
}
}
bool BMP581Component::write_iir_settings_(IIRFilter temperature_iir, IIRFilter pressure_iir) {
// - ensures data registers store filtered values
// - sets IIR filter levels on sensor
// - matches other default settings on sensor
// - writes configuration to the two relevant registers
// - returns success or failure of write to the registers
// If the temperature/pressure IIR filter is configured, then ensure data registers store the filtered measurement
this->dsp_config_.bit.shdw_sel_iir_t = (temperature_iir != IIR_FILTER_OFF);
this->dsp_config_.bit.shdw_sel_iir_p = (pressure_iir != IIR_FILTER_OFF);
// set temperature and pressure IIR filter level to configured values
this->iir_config_.bit.set_iir_t = temperature_iir;
this->iir_config_.bit.set_iir_p = pressure_iir;
// enable pressure and temperature compensation (page 61 of datasheet)
// - ?only relevant if IIR filter is applied?; the datasheet is ambiguous
// - matches BMP's default setting
this->dsp_config_.bit.comp_pt_en = 0x3;
// BMP581_DSP register and BMP581_DSP_IIR registers are successive
// - allows us to write the IIR configuration with one command to both registers
uint8_t register_data[2] = {this->dsp_config_.reg, this->iir_config_.reg};
return this->write_bytes(BMP581_DSP, register_data, sizeof(register_data));
}
bool BMP581Component::write_interrupt_source_settings_(bool data_ready_enable) {
// - updates component's internal setting
// - returns success or failure of write to interrupt source register
this->int_source_.bit.drdy_data_reg_en = data_ready_enable;
// write interrupt source register
return this->write_byte(BMP581_INT_SOURCE, this->int_source_.reg);
}
bool BMP581Component::write_oversampling_settings_(Oversampling temperature_oversampling,
Oversampling pressure_oversampling) {
// - updates component's internal setting
// - returns success or failure of write to Over-Sampling Rate register
this->osr_config_.bit.osr_t = temperature_oversampling;
this->osr_config_.bit.osr_p = pressure_oversampling;
return this->write_byte(BMP581_OSR, this->osr_config_.reg);
}
bool BMP581Component::write_power_mode_(OperationMode mode) {
// - updates the component's internal power mode
// - returns success or failure of write to Output Data Rate register
this->odr_config_.bit.pwr_mode = mode;
// write odr register
return this->write_byte(BMP581_ODR, this->odr_config_.reg);
}
} // namespace bmp581
} // namespace esphome

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esphome/components/bmp581/bmp581.h Normal file
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// All datasheet page references refer to Bosch Document Number BST-BMP581-DS004-04 (revision number 1.4)
#pragma once
#include "esphome/core/component.h"
#include "esphome/components/i2c/i2c.h"
#include "esphome/components/sensor/sensor.h"
namespace esphome {
namespace bmp581 {
static const uint8_t BMP581_ASIC_ID = 0x50; // BMP581's ASIC chip ID (page 51 of datasheet)
static const uint8_t RESET_COMMAND = 0xB6; // Soft reset command
// BMP581 Register Addresses
enum {
BMP581_CHIP_ID = 0x01, // read chip ID
BMP581_INT_SOURCE = 0x15, // write interrupt sources
BMP581_MEASUREMENT_DATA =
0x1D, // read measurement registers, 0x1D-0x1F are temperature XLSB to MSB and 0x20-0x22 are pressure XLSB to MSB
BMP581_INT_STATUS = 0x27, // read interrupt statuses
BMP581_STATUS = 0x28, // read sensor status
BMP581_DSP = 0x30, // write sensor configuration
BMP581_DSP_IIR = 0x31, // write IIR filter configuration
BMP581_OSR = 0x36, // write oversampling configuration
BMP581_ODR = 0x37, // write data rate and power mode configuration
BMP581_COMMAND = 0x7E // write sensor command
};
// BMP581 Power mode operations
enum OperationMode {
STANDBY_MODE = 0x0, // no active readings
NORMAL_MODE = 0x1, // read continuously at ODR configured rate and standby between
FORCED_MODE = 0x2, // read sensor once (only reading mode used by this component)
NONSTOP_MODE = 0x3 // read continuously with no standby
};
// Temperature and pressure sensors can be oversampled to reduce noise
enum Oversampling {
OVERSAMPLING_NONE = 0x0,
OVERSAMPLING_X2 = 0x1,
OVERSAMPLING_X4 = 0x2,
OVERSAMPLING_X8 = 0x3,
OVERSAMPLING_X16 = 0x4,
OVERSAMPLING_X32 = 0x5,
OVERSAMPLING_X64 = 0x6,
OVERSAMPLING_X128 = 0x7
};
// Infinite Impulse Response filter reduces noise caused by ambient disturbances
enum IIRFilter {
IIR_FILTER_OFF = 0x0,
IIR_FILTER_2 = 0x1,
IIR_FILTER_4 = 0x2,
IIR_FILTER_8 = 0x3,
IIR_FILTER_16 = 0x4,
IIR_FILTER_32 = 0x5,
IIR_FILTER_64 = 0x6,
IIR_FILTER_128 = 0x7
};
class BMP581Component : public PollingComponent, public i2c::I2CDevice {
public:
float get_setup_priority() const override { return setup_priority::DATA; }
void dump_config() override;
void setup() override;
void update() override;
void set_temperature_sensor(sensor::Sensor *temperature_sensor) { this->temperature_sensor_ = temperature_sensor; }
void set_pressure_sensor(sensor::Sensor *pressure_sensor) { this->pressure_sensor_ = pressure_sensor; }
void set_temperature_oversampling_config(Oversampling temperature_oversampling) {
this->temperature_oversampling_ = temperature_oversampling;
}
void set_pressure_oversampling_config(Oversampling pressure_oversampling) {
this->pressure_oversampling_ = pressure_oversampling;
}
void set_temperature_iir_filter_config(IIRFilter iir_temperature_level) {
this->iir_temperature_level_ = iir_temperature_level;
}
void set_pressure_iir_filter_config(IIRFilter iir_pressure_level) { this->iir_pressure_level_ = iir_pressure_level; }
void set_conversion_time(uint8_t conversion_time) { this->conversion_time_ = conversion_time; }
protected:
sensor::Sensor *temperature_sensor_{nullptr};
sensor::Sensor *pressure_sensor_{nullptr};
Oversampling temperature_oversampling_;
Oversampling pressure_oversampling_;
IIRFilter iir_temperature_level_;
IIRFilter iir_pressure_level_;
// Stores the sensors conversion time needed for a measurement based on oversampling settings and datasheet (page 12)
// Computed in Python during codegen
uint8_t conversion_time_;
// Checks if the BMP581 has measurement data ready by checking the sensor's interrupts
bool check_data_readiness_();
// Flushes the IIR filter and primes an initial reading
bool prime_iir_filter_();
// Reads temperature data from sensor and converts data to measurement in degrees Celsius
bool read_temperature_(float &temperature);
// Reads temperature and pressure data from sensor and converts data to measurements in degrees Celsius and Pa
bool read_temperature_and_pressure_(float &temperature, float &pressure);
// Soft resets the BMP581
bool reset_();
// Initiates a measurement on sensor by switching to FORCED_MODE
bool start_measurement_();
// Writes the IIR filter configuration to the DSP and DSP_IIR registers
bool write_iir_settings_(IIRFilter temperature_iir, IIRFilter pressure_iir);
// Writes whether to enable the data ready interrupt to the interrupt source register
bool write_interrupt_source_settings_(bool data_ready_enable);
// Writes the oversampling settings to the OSR register
bool write_oversampling_settings_(Oversampling temperature_oversampling, Oversampling pressure_oversampling);
// Sets the power mode on the BMP581 by writing to the ODR register
bool write_power_mode_(OperationMode mode);
enum ErrorCode {
NONE = 0,
ERROR_COMMUNICATION_FAILED,
ERROR_WRONG_CHIP_ID,
ERROR_SENSOR_STATUS,
ERROR_SENSOR_RESET,
ERROR_PRIME_IIR_FAILED
} error_code_{NONE};
// BMP581's interrupt source register (address 0x15) to configure which interrupts are enabled (page 54 of datasheet)
union {
struct {
uint8_t drdy_data_reg_en : 1; // Data ready interrupt enable
uint8_t fifo_full_en : 1; // FIFO full interrupt enable
uint8_t fifo_ths_en : 1; // FIFO threshold/watermark interrupt enable
uint8_t oor_p_en : 1; // Pressure data out-of-range interrupt enable
} bit;
uint8_t reg;
} int_source_ = {.reg = 0};
// BMP581's interrupt status register (address 0x27) to determine ensor's current state (page 58 of datasheet)
union {
struct {
uint8_t drdy_data_reg : 1; // Data ready
uint8_t fifo_full : 1; // FIFO full
uint8_t fifo_ths : 1; // FIFO fhreshold/watermark
uint8_t oor_p : 1; // Pressure data out-of-range
uint8_t por : 1; // Power-On-Reset complete
} bit;
uint8_t reg;
} int_status_ = {.reg = 0};
// BMP581's status register (address 0x28) to determine if sensor has setup correctly (page 58 of datasheet)
union {
struct {
uint8_t status_core_rdy : 1;
uint8_t status_nvm_rdy : 1; // asserted if NVM is ready of operations
uint8_t status_nvm_err : 1; // asserted if NVM error
uint8_t status_nvm_cmd_err : 1; // asserted if boot command error
uint8_t status_boot_err_corrected : 1; // asserted if a boot error has been corrected
uint8_t : 2;
uint8_t st_crack_pass : 1; // asserted if crack check has executed without detecting a crack
} bit;
uint8_t reg;
} status_ = {.reg = 0};
// BMP581's dsp register (address 0x30) to configure data registers iir selection (page 61 of datasheet)
union {
struct {
uint8_t comp_pt_en : 2; // enable temperature and pressure compensation
uint8_t iir_flush_forced_en : 1; // IIR filter is flushed in forced mode
uint8_t shdw_sel_iir_t : 1; // temperature data register value selected before or after iir
uint8_t fifo_sel_iir_t : 1; // FIFO temperature data register value secected before or after iir
uint8_t shdw_sel_iir_p : 1; // pressure data register value selected before or after iir
uint8_t fifo_sel_iir_p : 1; // FIFO pressure data register value selected before or after iir
uint8_t oor_sel_iir_p : 1; // pressure out-of-range value selected before or after iir
} bit;
uint8_t reg;
} dsp_config_ = {.reg = 0};
// BMP581's iir register (address 0x31) to configure iir filtering(page 62 of datasheet)
union {
struct {
uint8_t set_iir_t : 3; // Temperature IIR filter coefficient
uint8_t set_iir_p : 3; // Pressure IIR filter coefficient
} bit;
uint8_t reg;
} iir_config_ = {.reg = 0};
// BMP581's OSR register (address 0x36) to configure Over-Sampling Rates (page 64 of datasheet)
union {
struct {
uint8_t osr_t : 3; // Temperature oversampling
uint8_t osr_p : 3; // Pressure oversampling
uint8_t press_en : 1; // Enables pressure measurement
} bit;
uint8_t reg;
} osr_config_ = {.reg = 0};
// BMP581's odr register (address 0x37) to configure output data rate and power mode (page 64 of datasheet)
union {
struct {
uint8_t pwr_mode : 2; // power mode of sensor
uint8_t odr : 5; // output data rate
uint8_t deep_dis : 1; // deep standby disabled if asserted
} bit;
uint8_t reg;
} odr_config_ = {.reg = 0};
};
} // namespace bmp581
} // namespace esphome

163
esphome/components/bmp581/sensor.py Normal file
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@ -0,0 +1,163 @@
import math
import esphome.codegen as cg
import esphome.config_validation as cv
from esphome.components import i2c, sensor
from esphome.const import (
CONF_ID,
CONF_IIR_FILTER,
CONF_OVERSAMPLING,
CONF_PRESSURE,
CONF_TEMPERATURE,
DEVICE_CLASS_ATMOSPHERIC_PRESSURE,
DEVICE_CLASS_TEMPERATURE,
STATE_CLASS_MEASUREMENT,
UNIT_CELSIUS,
UNIT_PASCAL,
)
CODEOWNERS = ["@kahrendt"]
DEPENDENCIES = ["i2c"]
bmp581_ns = cg.esphome_ns.namespace("bmp581")
Oversampling = bmp581_ns.enum("Oversampling")
OVERSAMPLING_OPTIONS = {
"NONE": Oversampling.OVERSAMPLING_NONE,
"2X": Oversampling.OVERSAMPLING_X2,
"4X": Oversampling.OVERSAMPLING_X4,
"8X": Oversampling.OVERSAMPLING_X8,
"16X": Oversampling.OVERSAMPLING_X16,
"32X": Oversampling.OVERSAMPLING_X32,
"64X": Oversampling.OVERSAMPLING_X64,
"128X": Oversampling.OVERSAMPLING_X128,
}
IIRFilter = bmp581_ns.enum("IIRFilter")
IIR_FILTER_OPTIONS = {
"OFF": IIRFilter.IIR_FILTER_OFF,
"2X": IIRFilter.IIR_FILTER_2,
"4X": IIRFilter.IIR_FILTER_4,
"8X": IIRFilter.IIR_FILTER_8,
"16X": IIRFilter.IIR_FILTER_16,
"32X": IIRFilter.IIR_FILTER_32,
"64X": IIRFilter.IIR_FILTER_64,
"128X": IIRFilter.IIR_FILTER_128,
}
BMP581Component = bmp581_ns.class_(
"BMP581Component", cg.PollingComponent, i2c.I2CDevice
)
def compute_measurement_conversion_time(config):
# - adds up sensor conversion time based on temperature and pressure oversampling rates given in datasheet
# - returns a rounded up time in ms
# Page 12 of datasheet
PRESSURE_OVERSAMPLING_CONVERSION_TIMES = {
"NONE": 1.0,
"2X": 1.7,
"4X": 2.9,
"8X": 5.4,
"16X": 10.4,
"32X": 20.4,
"64X": 40.4,
"128X": 80.4,
}
# Page 12 of datasheet
TEMPERATURE_OVERSAMPLING_CONVERSION_TIMES = {
"NONE": 1.0,
"2X": 1.1,
"4X": 1.5,
"8X": 2.1,
"16X": 3.3,
"32X": 5.8,
"64X": 10.8,
"128X": 20.8,
}
pressure_conversion_time = (
0.0 # No conversion time necessary without a pressure sensor
)
if pressure_config := config.get(CONF_PRESSURE):
pressure_conversion_time = PRESSURE_OVERSAMPLING_CONVERSION_TIMES[
pressure_config.get(CONF_OVERSAMPLING)
]
temperature_conversion_time = (
1.0 # BMP581 always samples the temperature even if only reading pressure
)
if temperature_config := config.get(CONF_TEMPERATURE):
temperature_conversion_time = TEMPERATURE_OVERSAMPLING_CONVERSION_TIMES[
temperature_config.get(CONF_OVERSAMPLING)
]
# Datasheet indicates a 5% possible error in each conversion time listed
return math.ceil(1.05 * (pressure_conversion_time + temperature_conversion_time))
CONFIG_SCHEMA = (
cv.Schema(
{
cv.GenerateID(): cv.declare_id(BMP581Component),
cv.Optional(CONF_TEMPERATURE): sensor.sensor_schema(
unit_of_measurement=UNIT_CELSIUS,
accuracy_decimals=1,
device_class=DEVICE_CLASS_TEMPERATURE,
state_class=STATE_CLASS_MEASUREMENT,
).extend(
{
cv.Optional(CONF_OVERSAMPLING, default="NONE"): cv.enum(
OVERSAMPLING_OPTIONS, upper=True
),
cv.Optional(CONF_IIR_FILTER, default="OFF"): cv.enum(
IIR_FILTER_OPTIONS, upper=True
),
}
),
cv.Optional(CONF_PRESSURE): sensor.sensor_schema(
unit_of_measurement=UNIT_PASCAL,
accuracy_decimals=0,
device_class=DEVICE_CLASS_ATMOSPHERIC_PRESSURE,
state_class=STATE_CLASS_MEASUREMENT,
).extend(
{
cv.Optional(CONF_OVERSAMPLING, default="16X"): cv.enum(
OVERSAMPLING_OPTIONS, upper=True
),
cv.Optional(CONF_IIR_FILTER, default="OFF"): cv.enum(
IIR_FILTER_OPTIONS, upper=True
),
}
),
}
)
.extend(cv.polling_component_schema("60s"))
.extend(i2c.i2c_device_schema(0x46))
)
async def to_code(config):
var = cg.new_Pvariable(config[CONF_ID])
await cg.register_component(var, config)
await i2c.register_i2c_device(var, config)
if temperature_config := config.get(CONF_TEMPERATURE):
sens = await sensor.new_sensor(temperature_config)
cg.add(var.set_temperature_sensor(sens))
cg.add(
var.set_temperature_oversampling_config(
temperature_config[CONF_OVERSAMPLING]
)
)
cg.add(
var.set_temperature_iir_filter_config(temperature_config[CONF_IIR_FILTER])
)
if pressure_config := config.get(CONF_PRESSURE):
sens = await sensor.new_sensor(pressure_config)
cg.add(var.set_pressure_sensor(sens))
cg.add(var.set_pressure_oversampling_config(pressure_config[CONF_OVERSAMPLING]))
cg.add(var.set_pressure_iir_filter_config(pressure_config[CONF_IIR_FILTER]))
cg.add(var.set_conversion_time(compute_measurement_conversion_time(config)))

8
tests/test1.yaml
View file

@ -1355,6 +1355,14 @@ sensor:
name: "Distance"
update_interval: 60s
i2c_id: i2c_bus
- platform: bmp581
i2c_id: i2c_bus
temperature:
name: "BMP581 Temperature"
iir_filter: 2x
pressure:
name: "BMP581 Pressure"
oversampling: 128x
esp32_touch:
setup_mode: false