Thu, 06 Apr 2023 20:53:06 +0200
Set the new measured deep sleep current consumption. This is half of the Wemos D1 system.
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1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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1 | /* |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
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2 | * The MIT License (MIT) |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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3 | * |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
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4 | * Copyright (c) 2015 Frank Bargstedt |
1c9894662795
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5 | * Copyright (c) 2018 Ruslan V. Uss <unclerus@gmail.com> |
1c9894662795
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6 | * |
1c9894662795
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7 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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8 | * of this software and associated documentation files (the "Software"), to deal |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
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9 | * in the Software without restriction, including without limitation the rights |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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10 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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11 | * copies of the Software, and to permit persons to whom the Software is |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
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12 | * furnished to do so, subject to the following conditions: |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
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13 | * The above copyright notice and this permission notice shall be included in all |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
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14 | * copies or substantial portions of the Software. |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
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15 | * |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
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17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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19 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
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22 | * SOFTWARE. |
1c9894662795
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23 | */ |
1c9894662795
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24 | |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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25 | /** |
1c9894662795
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26 | * @file bmp180.c |
1c9894662795
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27 | * |
1c9894662795
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28 | * ESP-IDF driver for BMP180 digital pressure sensor |
1c9894662795
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29 | * |
1c9894662795
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30 | * Ported from esp-open-rtos |
1c9894662795
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31 | * |
1c9894662795
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32 | * Copyright (c) 2015 Frank Bargstedt\n |
1c9894662795
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33 | * Copyright (c) 2018 Ruslan V. Uss <unclerus@gmail.com> |
1c9894662795
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34 | * |
1c9894662795
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35 | * MIT Licensed as described in the file LICENSE |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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36 | */ |
1c9894662795
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37 | #include "bmp180.h" |
1c9894662795
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38 | #include <inttypes.h> |
1c9894662795
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39 | #include <esp_err.h> |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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40 | #include <esp_log.h> |
1c9894662795
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41 | #include <ets_sys.h> |
1c9894662795
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42 | #include <esp_idf_lib_helpers.h> |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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43 | |
1c9894662795
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44 | #define I2C_FREQ_HZ 1000000 // Max 1MHz for esp-idf |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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45 | |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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46 | static const char *TAG = "bmp180"; |
1c9894662795
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47 | |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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48 | #define BMP180_RX_QUEUE_SIZE 10 |
1c9894662795
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49 | #define BMP180_TASK_PRIORITY 9 |
1c9894662795
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50 | |
1c9894662795
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51 | #define BMP180_VERSION_REG 0xD0 |
1c9894662795
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52 | #define BMP180_CONTROL_REG 0xF4 |
1c9894662795
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53 | #define BMP180_RESET_REG 0xE0 |
1c9894662795
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54 | #define BMP180_OUT_MSB_REG 0xF6 |
1c9894662795
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55 | #define BMP180_OUT_LSB_REG 0xF7 |
1c9894662795
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56 | #define BMP180_OUT_XLSB_REG 0xF8 |
1c9894662795
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57 | |
1c9894662795
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58 | #define BMP180_CALIBRATION_REG 0xAA |
1c9894662795
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59 | |
1c9894662795
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60 | // Values for BMP180_CONTROL_REG |
1c9894662795
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61 | #define BMP180_MEASURE_TEMP 0x2E |
1c9894662795
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62 | #define BMP180_MEASURE_PRESS 0x34 |
1c9894662795
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63 | |
1c9894662795
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64 | // CHIP ID stored in BMP180_VERSION_REG |
1c9894662795
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65 | #define BMP180_CHIP_ID 0x55 |
1c9894662795
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66 | |
1c9894662795
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67 | // Reset value for BMP180_RESET_REG |
1c9894662795
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68 | #define BMP180_RESET_VALUE 0xB6 |
1c9894662795
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69 | |
1c9894662795
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70 | #define CHECK(x) do { esp_err_t __; if ((__ = x) != ESP_OK) return __; } while (0) |
1c9894662795
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71 | #define CHECK_ARG(VAL) do { if (!(VAL)) return ESP_ERR_INVALID_ARG; } while (0) |
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72 | |
1c9894662795
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73 | static esp_err_t bmp180_read_reg_16(i2c_dev_t *dev, uint8_t reg, int16_t *r) |
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74 | { |
1c9894662795
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75 | uint8_t d[] = { 0, 0 }; |
1c9894662795
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76 | |
1c9894662795
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77 | CHECK(i2c_dev_read_reg(dev, reg, d, 2)); |
1c9894662795
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78 | *r = ((int16_t)d[0] << 8) | (d[1]); |
1c9894662795
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79 | |
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80 | return ESP_OK; |
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81 | } |
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82 | |
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83 | static inline esp_err_t bmp180_start_measurement(i2c_dev_t *dev, uint8_t cmd) |
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84 | { |
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85 | return i2c_dev_write_reg(dev, BMP180_CONTROL_REG, &cmd, 1); |
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86 | } |
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87 | |
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88 | static esp_err_t bmp180_get_uncompensated_temperature(i2c_dev_t *dev, int32_t *ut) |
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89 | { |
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90 | // Write Start Code into reg 0xF4. |
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91 | CHECK(bmp180_start_measurement(dev, BMP180_MEASURE_TEMP)); |
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92 | |
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93 | // Wait 5ms, datasheet states 4.5ms |
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94 | ets_delay_us(5000); |
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95 | |
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96 | int16_t v; |
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97 | CHECK(bmp180_read_reg_16(dev, BMP180_OUT_MSB_REG, &v)); |
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98 | *ut = v; |
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99 | return ESP_OK; |
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100 | } |
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101 | |
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102 | static esp_err_t bmp180_get_uncompensated_pressure(i2c_dev_t *dev, bmp180_mode_t oss, uint32_t *up) |
1c9894662795
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103 | { |
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104 | uint16_t us; |
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105 | |
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106 | // Limit oss and set the measurement wait time. The datasheet |
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107 | // states 4.5, 7.5, 13.5, 25.5ms for oss 0 to 3. |
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108 | switch (oss) |
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109 | { |
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110 | case BMP180_MODE_ULTRA_LOW_POWER: us = 5000; break; |
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111 | case BMP180_MODE_STANDARD: us = 8000; break; |
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112 | case BMP180_MODE_HIGH_RESOLUTION: us = 14000; break; |
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113 | default: oss = BMP180_MODE_ULTRA_HIGH_RESOLUTION; us = 26000; break; |
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114 | } |
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115 | |
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116 | // Write Start Code into reg 0xF4 |
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117 | CHECK(bmp180_start_measurement(dev, BMP180_MEASURE_PRESS | (oss << 6))); |
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118 | |
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119 | ets_delay_us(us); |
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120 | |
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121 | uint8_t d[] = { 0, 0, 0 }; |
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122 | uint8_t reg = BMP180_OUT_MSB_REG; |
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123 | CHECK(i2c_dev_read_reg(dev, reg, d, 3)); |
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124 | |
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125 | uint32_t r = ((uint32_t)d[0] << 16) | ((uint32_t)d[1] << 8) | d[2]; |
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126 | r >>= 8 - oss; |
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127 | *up = r; |
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128 | |
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129 | return ESP_OK; |
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130 | } |
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131 | |
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132 | esp_err_t bmp180_init_desc(bmp180_dev_t *dev, i2c_port_t port, gpio_num_t sda_gpio, gpio_num_t scl_gpio) |
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133 | { |
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134 | CHECK_ARG(dev); |
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135 | |
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136 | dev->i2c_dev.port = port; |
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137 | dev->i2c_dev.addr = BMP180_DEVICE_ADDRESS; |
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138 | dev->i2c_dev.cfg.sda_io_num = sda_gpio; |
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139 | dev->i2c_dev.cfg.scl_io_num = scl_gpio; |
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140 | #if HELPER_TARGET_IS_ESP32 |
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141 | dev->i2c_dev.cfg.master.clk_speed = I2C_FREQ_HZ; |
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142 | #endif |
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143 | |
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144 | return i2c_dev_create_mutex(&dev->i2c_dev); |
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145 | } |
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146 | |
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147 | esp_err_t bmp180_free_desc(bmp180_dev_t *dev) |
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148 | { |
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149 | CHECK_ARG(dev); |
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150 | |
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151 | return i2c_dev_delete_mutex(&dev->i2c_dev); |
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152 | } |
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153 | |
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154 | esp_err_t bmp180_init(bmp180_dev_t *dev) |
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155 | { |
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156 | CHECK_ARG(dev); |
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157 | |
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158 | |
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159 | I2C_DEV_TAKE_MUTEX(&dev->i2c_dev); |
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160 | |
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161 | uint8_t id; |
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162 | I2C_DEV_CHECK(&dev->i2c_dev, i2c_dev_read_reg(&dev->i2c_dev, BMP180_VERSION_REG, &id, 1)); |
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163 | if (id != BMP180_CHIP_ID) |
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164 | { |
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165 | I2C_DEV_GIVE_MUTEX(&dev->i2c_dev); |
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166 | ESP_LOGE(TAG, "Invalid device ID: 0x%02x", id); |
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167 | return ESP_ERR_NOT_FOUND; |
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168 | } |
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169 | |
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170 | I2C_DEV_CHECK(&dev->i2c_dev, bmp180_read_reg_16(&dev->i2c_dev, BMP180_CALIBRATION_REG + 0, &dev->AC1)); |
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171 | I2C_DEV_CHECK(&dev->i2c_dev, bmp180_read_reg_16(&dev->i2c_dev, BMP180_CALIBRATION_REG + 2, &dev->AC2)); |
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172 | I2C_DEV_CHECK(&dev->i2c_dev, bmp180_read_reg_16(&dev->i2c_dev, BMP180_CALIBRATION_REG + 4, &dev->AC3)); |
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173 | I2C_DEV_CHECK(&dev->i2c_dev, bmp180_read_reg_16(&dev->i2c_dev, BMP180_CALIBRATION_REG + 6, (int16_t *)&dev->AC4)); |
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174 | I2C_DEV_CHECK(&dev->i2c_dev, bmp180_read_reg_16(&dev->i2c_dev, BMP180_CALIBRATION_REG + 8, (int16_t *)&dev->AC5)); |
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175 | I2C_DEV_CHECK(&dev->i2c_dev, bmp180_read_reg_16(&dev->i2c_dev, BMP180_CALIBRATION_REG + 10, (int16_t *)&dev->AC6)); |
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176 | I2C_DEV_CHECK(&dev->i2c_dev, bmp180_read_reg_16(&dev->i2c_dev, BMP180_CALIBRATION_REG + 12, &dev->B1)); |
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177 | I2C_DEV_CHECK(&dev->i2c_dev, bmp180_read_reg_16(&dev->i2c_dev, BMP180_CALIBRATION_REG + 14, &dev->B2)); |
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178 | I2C_DEV_CHECK(&dev->i2c_dev, bmp180_read_reg_16(&dev->i2c_dev, BMP180_CALIBRATION_REG + 16, &dev->MB)); |
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179 | I2C_DEV_CHECK(&dev->i2c_dev, bmp180_read_reg_16(&dev->i2c_dev, BMP180_CALIBRATION_REG + 18, &dev->MC)); |
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180 | I2C_DEV_CHECK(&dev->i2c_dev, bmp180_read_reg_16(&dev->i2c_dev, BMP180_CALIBRATION_REG + 20, &dev->MD)); |
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181 | |
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182 | I2C_DEV_GIVE_MUTEX(&dev->i2c_dev); |
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183 | |
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184 | ESP_LOGD(TAG, "AC1:=%d AC2:=%d AC3:=%d AC4:=%u AC5:=%u AC6:=%u", dev->AC1, dev->AC2, dev->AC3, dev->AC4, dev->AC5, dev->AC6); |
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185 | ESP_LOGD(TAG, "B1:=%d B2:=%d", dev->B1, dev->B2); |
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186 | ESP_LOGD(TAG, "MB:=%d MC:=%d MD:=%d", dev->MB, dev->MC, dev->MD); |
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187 | |
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188 | if (dev->AC1== 0 || dev->AC2 == 0 || dev->AC3 == 0 || |
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189 | dev->AC4 == 0 || dev->AC5 == 0 || dev->AC6 == 0 || |
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190 | dev->B1 == 0 || dev->B2 == 0 || |
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191 | dev->MB == 0 || dev->MC == 0 || dev->MD == 0) |
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192 | { |
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193 | return ESP_ERR_INVALID_RESPONSE; |
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194 | } |
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195 | |
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196 | return ESP_OK; |
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197 | } |
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198 | |
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199 | /////////////////////////////////////////////////////////////////////////////// |
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200 | |
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201 | esp_err_t bmp180_measure(bmp180_dev_t *dev, float *temperature, uint32_t *pressure, bmp180_mode_t oss) |
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202 | { |
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203 | CHECK_ARG(dev && temperature && pressure); |
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204 | |
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205 | I2C_DEV_TAKE_MUTEX(&dev->i2c_dev); |
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206 | |
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207 | // Temperature is always needed, also required for pressure only. |
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208 | // |
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209 | // Calculation taken from BMP180 Datasheet |
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210 | int32_t T, P; |
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211 | int32_t UT, X1, X2, B5; |
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212 | UT = 0; |
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213 | I2C_DEV_CHECK(&dev->i2c_dev, bmp180_get_uncompensated_temperature(&dev->i2c_dev, &UT)); |
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214 | |
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215 | X1 = ((UT - (int32_t)dev->AC6) * (int32_t)dev->AC5) >> 15; |
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216 | X2 = ((int32_t)dev->MC << 11) / (X1 + (int32_t)dev->MD); |
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217 | B5 = X1 + X2; |
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218 | T = (B5 + 8) >> 4; |
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219 | |
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220 | if (temperature) |
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221 | *temperature = T / 10.0; |
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222 | |
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223 | ESP_LOGD(TAG, "T:= %" PRIi32 ".%d", T / 10, abs(T % 10)); |
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224 | |
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225 | if (pressure) |
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226 | { |
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227 | int32_t X3, B3, B6; |
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228 | uint32_t B4, B7, UP = 0; |
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229 | |
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230 | I2C_DEV_CHECK(&dev->i2c_dev, bmp180_get_uncompensated_pressure(&dev->i2c_dev, oss, &UP)); |
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231 | |
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232 | // Calculation taken from BMP180 Datasheet |
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233 | B6 = B5 - 4000; |
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234 | X1 = ((int32_t)dev->B2 * ((B6 * B6) >> 12)) >> 11; |
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235 | X2 = ((int32_t)dev->AC2 * B6) >> 11; |
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236 | X3 = X1 + X2; |
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237 | |
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238 | B3 = ((((int32_t)dev->AC1 * 4 + X3) << oss) + 2) >> 2; |
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239 | X1 = ((int32_t)dev->AC3 * B6) >> 13; |
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240 | X2 = ((int32_t)dev->B1 * ((B6 * B6) >> 12)) >> 16; |
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241 | X3 = ((X1 + X2) + 2) >> 2; |
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242 | B4 = ((uint32_t)dev->AC4 * (uint32_t)(X3 + 32768)) >> 15; |
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243 | B7 = ((uint32_t)UP - B3) * (uint32_t)(50000UL >> oss); |
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244 | |
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245 | if (B7 < 0x80000000UL) |
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246 | P = (B7 * 2) / B4; |
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247 | else |
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248 | P = (B7 / B4) * 2; |
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249 | |
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250 | X1 = (P >> 8) * (P >> 8); |
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251 | X1 = (X1 * 3038) >> 16; |
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252 | X2 = (-7357 * P) >> 16; |
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253 | P = P + ((X1 + X2 + (int32_t)3791) >> 4); |
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254 | |
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255 | *pressure = P; |
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256 | |
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257 | ESP_LOGD(TAG, "P:= %" PRIi32, P); |
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258 | } |
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259 | |
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260 | I2C_DEV_GIVE_MUTEX(&dev->i2c_dev); |
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261 | |
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262 | return ESP_OK; |
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263 | } |