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.
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2 | * The MIT License (MIT) |
1c9894662795
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3 | * |
1c9894662795
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4 | * Copyright (c) 2014 zeroday nodemcu.com |
1c9894662795
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5 | * |
1c9894662795
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6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
1c9894662795
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7 | * of this software and associated documentation files (the "Software"), to deal |
1c9894662795
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8 | * 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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9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
1c9894662795
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10 | * 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.
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11 | * furnished to do so, subject to the following conditions: |
1c9894662795
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12 | * |
1c9894662795
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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.
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14 | * copies or substantial portions of the Software. |
1c9894662795
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15 | * |
1c9894662795
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16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
1c9894662795
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17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
1c9894662795
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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
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21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
1c9894662795
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22 | * SOFTWARE. |
1c9894662795
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23 | * ------------------------------------------------------------------------------- |
1c9894662795
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24 | * Portions copyright (C) 2000 Dallas Semiconductor Corporation, under the |
1c9894662795
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25 | * following additional terms: |
1c9894662795
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26 | * |
1c9894662795
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27 | * Except as contained in this notice, the name of Dallas Semiconductor |
1c9894662795
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28 | * shall not be used except as stated in the Dallas Semiconductor |
1c9894662795
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29 | * Branding Policy. |
1c9894662795
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30 | */ |
1c9894662795
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31 | |
1c9894662795
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32 | /** |
1c9894662795
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33 | * @file onewire.c |
1c9894662795
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34 | * |
1c9894662795
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35 | * Routines to access devices using the Dallas Semiconductor 1-Wire(tm) |
1c9894662795
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36 | * protocol. |
1c9894662795
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37 | * |
1c9894662795
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38 | * This is a port of a bit-banging one wire driver based on the implementation |
1c9894662795
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39 | * from NodeMCU. |
1c9894662795
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Michiel Broek <mbroek@mbse.eu>
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40 | * |
1c9894662795
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41 | * This, in turn, appears to have been based on the PJRC Teensy driver |
1c9894662795
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42 | * (https://www.pjrc.com/teensy/td_libs_OneWire.html), by Jim Studt, Paul |
1c9894662795
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43 | * Stoffregen, and a host of others. |
1c9894662795
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44 | * |
1c9894662795
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45 | * The original code is licensed under the MIT license. The CRC code was taken |
1c9894662795
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46 | * (at least partially) from Dallas Semiconductor sample code, which was licensed |
1c9894662795
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47 | * under an MIT license with an additional clause (prohibiting inappropriate use |
1c9894662795
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48 | * of the Dallas Semiconductor name). See the accompanying LICENSE file for |
1c9894662795
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49 | * details. |
1c9894662795
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50 | */ |
1c9894662795
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51 | |
1c9894662795
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52 | #include <string.h> |
1c9894662795
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53 | #include <freertos/FreeRTOS.h> |
1c9894662795
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54 | #include <freertos/task.h> |
1c9894662795
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55 | #include <ets_sys.h> |
1c9894662795
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56 | #include <esp_idf_lib_helpers.h> |
1c9894662795
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57 | #include "onewire.h" |
1c9894662795
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58 | |
1c9894662795
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59 | #define ONEWIRE_SELECT_ROM 0x55 |
1c9894662795
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60 | #define ONEWIRE_SKIP_ROM 0xcc |
1c9894662795
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61 | #define ONEWIRE_SEARCH 0xf0 |
1c9894662795
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62 | |
1c9894662795
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63 | #if HELPER_TARGET_IS_ESP8266 |
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64 | #define PORT_ENTER_CRITICAL portENTER_CRITICAL() |
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65 | #define PORT_EXIT_CRITICAL portEXIT_CRITICAL() |
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66 | #define OPEN_DRAIN_MODE GPIO_MODE_OUTPUT_OD |
1c9894662795
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67 | |
1c9894662795
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68 | #elif HELPER_TARGET_IS_ESP32 |
1c9894662795
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69 | static portMUX_TYPE mux = portMUX_INITIALIZER_UNLOCKED; |
1c9894662795
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70 | #define PORT_ENTER_CRITICAL portENTER_CRITICAL(&mux) |
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71 | #define PORT_EXIT_CRITICAL portEXIT_CRITICAL(&mux) |
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72 | #define OPEN_DRAIN_MODE GPIO_MODE_INPUT_OUTPUT_OD |
1c9894662795
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73 | #else |
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74 | #error BUG: Unknown target |
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75 | #endif |
1c9894662795
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76 | |
1c9894662795
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77 | // Waits up to `max_wait` microseconds for the specified pin to go high. |
1c9894662795
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78 | // Returns true if successful, false if the bus never comes high (likely |
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79 | // shorted). |
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80 | static inline bool _onewire_wait_for_bus(gpio_num_t pin, int max_wait) |
1c9894662795
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81 | { |
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82 | bool state; |
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83 | for (int i = 0; i < ((max_wait + 4) / 5); i++) |
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84 | { |
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85 | if (gpio_get_level(pin)) |
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86 | break; |
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87 | ets_delay_us(5); |
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88 | } |
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89 | state = gpio_get_level(pin); |
1c9894662795
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90 | // Wait an extra 1us to make sure the devices have an adequate recovery |
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91 | // time before we drive things low again. |
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92 | ets_delay_us(1); |
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93 | return state; |
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94 | } |
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95 | |
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96 | static void setup_pin(gpio_num_t pin, bool open_drain) |
1c9894662795
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97 | { |
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98 | gpio_set_direction(pin, open_drain ? OPEN_DRAIN_MODE : GPIO_MODE_OUTPUT); |
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99 | gpio_set_pull_mode(pin, GPIO_PULLUP_ONLY); |
1c9894662795
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100 | } |
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101 | |
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102 | // Perform the onewire reset function. We will wait up to 250uS for |
1c9894662795
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103 | // the bus to come high, if it doesn't then it is broken or shorted |
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104 | // and we return false; |
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105 | // |
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106 | // Returns true if a device asserted a presence pulse, false otherwise. |
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107 | // |
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108 | bool onewire_reset(gpio_num_t pin) |
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109 | { |
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110 | setup_pin(pin, true); |
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111 | |
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112 | gpio_set_level(pin, 1); |
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113 | // wait until the wire is high... just in case |
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114 | if (!_onewire_wait_for_bus(pin, 250)) |
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115 | return false; |
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116 | |
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117 | gpio_set_level(pin, 0); |
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118 | ets_delay_us(480); |
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119 | |
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120 | PORT_ENTER_CRITICAL; |
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121 | gpio_set_level(pin, 1); // allow it to float |
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122 | ets_delay_us(70); |
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123 | bool r = !gpio_get_level(pin); |
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124 | PORT_EXIT_CRITICAL; |
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125 | |
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126 | // Wait for all devices to finish pulling the bus low before returning |
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127 | if (!_onewire_wait_for_bus(pin, 410)) |
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128 | return false; |
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129 | |
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130 | return r; |
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131 | } |
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132 | |
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133 | static bool _onewire_write_bit(gpio_num_t pin, bool v) |
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134 | { |
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135 | if (!_onewire_wait_for_bus(pin, 10)) |
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136 | return false; |
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137 | PORT_ENTER_CRITICAL; |
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138 | if (v) |
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139 | { |
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140 | gpio_set_level(pin, 0); // drive output low |
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141 | ets_delay_us(10); |
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142 | gpio_set_level(pin, 1); // allow output high |
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143 | ets_delay_us(55); |
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144 | } |
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145 | else |
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146 | { |
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147 | gpio_set_level(pin, 0); // drive output low |
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148 | ets_delay_us(65); |
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149 | gpio_set_level(pin, 1); // allow output high |
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150 | } |
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151 | ets_delay_us(1); |
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152 | PORT_EXIT_CRITICAL; |
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153 | |
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154 | return true; |
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155 | } |
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156 | |
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157 | static int _onewire_read_bit(gpio_num_t pin) |
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158 | { |
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159 | if (!_onewire_wait_for_bus(pin, 10)) |
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160 | return -1; |
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161 | |
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162 | PORT_ENTER_CRITICAL; |
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163 | gpio_set_level(pin, 0); |
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164 | ets_delay_us(2); |
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165 | gpio_set_level(pin, 1); // let pin float, pull up will raise |
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166 | ets_delay_us(11); |
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167 | int r = gpio_get_level(pin); // Must sample within 15us of start |
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168 | ets_delay_us(48); |
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169 | PORT_EXIT_CRITICAL; |
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170 | |
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171 | return r; |
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172 | } |
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173 | |
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174 | // Write a byte. The writing code uses open-drain mode and expects the pullup |
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175 | // resistor to pull the line high when not driven low. If you need strong |
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176 | // power after the write (e.g. DS18B20 in parasite power mode) then call |
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177 | // onewire_power() after this is complete to actively drive the line high. |
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178 | // |
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179 | bool onewire_write(gpio_num_t pin, uint8_t v) |
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180 | { |
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181 | for (uint8_t bitMask = 0x01; bitMask; bitMask <<= 1) |
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182 | if (!_onewire_write_bit(pin, (bitMask & v))) |
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183 | return false; |
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184 | |
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185 | return true; |
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186 | } |
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187 | |
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188 | bool onewire_write_bytes(gpio_num_t pin, const uint8_t *buf, size_t count) |
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189 | { |
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190 | for (size_t i = 0; i < count; i++) |
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191 | if (!onewire_write(pin, buf[i])) |
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192 | return false; |
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193 | |
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194 | return true; |
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195 | } |
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196 | |
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197 | // Read a byte |
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198 | // |
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199 | int onewire_read(gpio_num_t pin) |
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200 | { |
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201 | int r = 0; |
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202 | |
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203 | for (uint8_t bitMask = 0x01; bitMask; bitMask <<= 1) |
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204 | { |
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205 | int bit = _onewire_read_bit(pin); |
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206 | if (bit < 0) |
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207 | return -1; |
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208 | else if (bit) |
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209 | r |= bitMask; |
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210 | } |
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211 | return r; |
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212 | } |
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213 | |
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214 | bool onewire_read_bytes(gpio_num_t pin, uint8_t *buf, size_t count) |
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215 | { |
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216 | size_t i; |
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217 | int b; |
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218 | |
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219 | for (i = 0; i < count; i++) |
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220 | { |
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221 | b = onewire_read(pin); |
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222 | if (b < 0) |
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223 | return false; |
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224 | buf[i] = b; |
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225 | } |
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226 | return true; |
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227 | } |
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228 | |
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229 | bool onewire_select(gpio_num_t pin, onewire_addr_t addr) |
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230 | { |
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231 | uint8_t i; |
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232 | |
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233 | if (!onewire_write(pin, ONEWIRE_SELECT_ROM)) |
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234 | return false; |
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235 | |
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236 | for (i = 0; i < 8; i++) |
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237 | { |
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238 | if (!onewire_write(pin, addr & 0xff)) |
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239 | return false; |
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240 | addr >>= 8; |
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241 | } |
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242 | |
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243 | return true; |
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244 | } |
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245 | |
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246 | bool onewire_skip_rom(gpio_num_t pin) |
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247 | { |
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248 | return onewire_write(pin, ONEWIRE_SKIP_ROM); |
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249 | } |
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250 | |
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251 | bool onewire_power(gpio_num_t pin) |
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252 | { |
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253 | // Make sure the bus is not being held low before driving it high, or we |
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254 | // may end up shorting ourselves out. |
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255 | if (!_onewire_wait_for_bus(pin, 10)) |
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256 | return false; |
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257 | |
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258 | setup_pin(pin, false); |
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259 | gpio_set_level(pin, 1); |
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260 | |
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261 | return true; |
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262 | } |
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263 | |
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264 | void onewire_depower(gpio_num_t pin) |
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265 | { |
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266 | setup_pin(pin, true); |
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267 | } |
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268 | |
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269 | void onewire_search_start(onewire_search_t *search) |
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270 | { |
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271 | // reset the search state |
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272 | memset(search, 0, sizeof(*search)); |
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273 | } |
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274 | |
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275 | void onewire_search_prefix(onewire_search_t *search, uint8_t family_code) |
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276 | { |
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277 | uint8_t i; |
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278 | |
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279 | search->rom_no[0] = family_code; |
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280 | for (i = 1; i < 8; i++) |
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281 | { |
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282 | search->rom_no[i] = 0; |
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283 | } |
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284 | search->last_discrepancy = 64; |
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285 | search->last_device_found = false; |
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286 | } |
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287 | |
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288 | // Perform a search. If the next device has been successfully enumerated, its |
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289 | // ROM address will be returned. If there are no devices, no further |
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290 | // devices, or something horrible happens in the middle of the |
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291 | // enumeration then ONEWIRE_NONE is returned. Use OneWire::reset_search() to |
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292 | // start over. |
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293 | // |
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294 | // --- Replaced by the one from the Dallas Semiconductor web site --- |
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295 | //-------------------------------------------------------------------------- |
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296 | // Perform the 1-Wire Search Algorithm on the 1-Wire bus using the existing |
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297 | // search state. |
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298 | // Return 1 : device found, ROM number in ROM_NO buffer |
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299 | // 0 : device not found, end of search |
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300 | // |
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301 | onewire_addr_t onewire_search_next(onewire_search_t *search, gpio_num_t pin) |
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302 | { |
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303 | //TODO: add more checking for read/write errors |
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304 | uint8_t id_bit_number; |
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305 | uint8_t last_zero, search_result; |
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306 | int rom_byte_number; |
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307 | int8_t id_bit, cmp_id_bit; |
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308 | onewire_addr_t addr; |
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309 | unsigned char rom_byte_mask; |
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310 | bool search_direction; |
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311 | |
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312 | // initialize for search |
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313 | id_bit_number = 1; |
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314 | last_zero = 0; |
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315 | rom_byte_number = 0; |
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316 | rom_byte_mask = 1; |
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317 | search_result = 0; |
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318 | |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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parents:
diff
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|
319 | // if the last call was not the last one |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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parents:
diff
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|
320 | if (!search->last_device_found) |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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parents:
diff
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|
321 | { |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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parents:
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|
322 | // 1-Wire reset |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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parents:
diff
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|
323 | if (!onewire_reset(pin)) |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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parents:
diff
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|
324 | { |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
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|
325 | // reset the search |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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parents:
diff
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|
326 | search->last_discrepancy = 0; |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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parents:
diff
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|
327 | search->last_device_found = false; |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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parents:
diff
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|
328 | return ONEWIRE_NONE; |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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parents:
diff
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|
329 | } |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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parents:
diff
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|
330 | |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
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|
331 | // issue the search command |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
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|
332 | onewire_write(pin, ONEWIRE_SEARCH); |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
333 | |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
334 | // loop to do the search |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
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|
335 | do |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
336 | { |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
337 | // read a bit and its complement |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
338 | id_bit = _onewire_read_bit(pin); |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
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|
339 | cmp_id_bit = _onewire_read_bit(pin); |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
340 | |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
341 | if ((id_bit == 1) && (cmp_id_bit == 1)) |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
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|
342 | break; |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
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|
343 | else |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
344 | { |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
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|
345 | // all devices coupled have 0 or 1 |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
346 | if (id_bit != cmp_id_bit) |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
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|
347 | search_direction = id_bit; // bit write value for search |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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parents:
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348 | else |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
349 | { |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
350 | // if this discrepancy if before the Last Discrepancy |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
351 | // on a previous next then pick the same as last time |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
352 | if (id_bit_number < search->last_discrepancy) |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
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|
353 | search_direction = ((search->rom_no[rom_byte_number] & rom_byte_mask) > 0); |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
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354 | else |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
355 | // if equal to last pick 1, if not then pick 0 |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
356 | search_direction = (id_bit_number == search->last_discrepancy); |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
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|
357 | |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
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|
358 | // if 0 was picked then record its position in LastZero |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
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|
359 | if (!search_direction) |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
360 | last_zero = id_bit_number; |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
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|
361 | } |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
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|
362 | |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
363 | // set or clear the bit in the ROM byte rom_byte_number |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
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|
364 | // with mask rom_byte_mask |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
365 | if (search_direction) |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
366 | search->rom_no[rom_byte_number] |= rom_byte_mask; |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
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|
367 | else |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
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|
368 | search->rom_no[rom_byte_number] &= ~rom_byte_mask; |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
369 | |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
370 | // serial number search direction write bit |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
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|
371 | _onewire_write_bit(pin, search_direction); |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
372 | |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
373 | // increment the byte counter id_bit_number |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
374 | // and shift the mask rom_byte_mask |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
375 | id_bit_number++; |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
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|
376 | rom_byte_mask <<= 1; |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
377 | |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
378 | // if the mask is 0 then go to new SerialNum byte rom_byte_number and reset mask |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
379 | if (rom_byte_mask == 0) |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
380 | { |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
381 | rom_byte_number++; |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
382 | rom_byte_mask = 1; |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
383 | } |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
384 | } |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
385 | } while (rom_byte_number < 8); // loop until through all ROM bytes 0-7 |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
386 | |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
387 | // if the search was successful then |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
388 | if (!(id_bit_number < 65)) |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
389 | { |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
390 | // search successful so set last_discrepancy,last_device_found,search_result |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
391 | search->last_discrepancy = last_zero; |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
392 | |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
393 | // check for last device |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
394 | if (search->last_discrepancy == 0) |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
395 | search->last_device_found = true; |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
396 | |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
397 | search_result = 1; |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
398 | } |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
399 | } |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
400 | |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
401 | // if no device found then reset counters so next 'search' will be like a first |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
402 | if (!search_result || !search->rom_no[0]) |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
403 | { |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
404 | search->last_discrepancy = 0; |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
405 | search->last_device_found = false; |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
406 | return ONEWIRE_NONE; |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
407 | } |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
408 | else |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
409 | { |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
410 | addr = 0; |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
411 | for (rom_byte_number = 7; rom_byte_number >= 0; rom_byte_number--) |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
412 | { |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
413 | addr = (addr << 8) | search->rom_no[rom_byte_number]; |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
414 | } |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
415 | //printf("Ok I found something at %08x%08x...\n", (uint32_t)(addr >> 32), (uint32_t)addr); |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
416 | } |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
417 | return addr; |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
418 | } |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
419 | |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
420 | // The 1-Wire CRC scheme is described in Maxim Application Note 27: |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
421 | // "Understanding and Using Cyclic Redundancy Checks with Maxim iButton Products" |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
422 | // |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
423 | |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
424 | #ifdef CONFIG_ONEWIRE_CRC8_TABLE |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
425 | // This table comes from Dallas sample code where it is freely reusable, |
1c9894662795
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426 | // though Copyright (c) 2000 Dallas Semiconductor Corporation |
1c9894662795
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427 | static const uint8_t dscrc_table[] = { |
1c9894662795
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428 | 0, 94, 188, 226, 97, 63, 221, 131, 194, 156, 126, 32, 163, 253, 31, 65, |
1c9894662795
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429 | 157, 195, 33, 127, 252, 162, 64, 30, 95, 1, 227, 189, 62, 96, 130, 220, |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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430 | 35, 125, 159, 193, 66, 28, 254, 160, 225, 191, 93, 3, 128, 222, 60, 98, |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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431 | 190, 224, 2, 92, 223, 129, 99, 61, 124, 34, 192, 158, 29, 67, 161, 255, |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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432 | 70, 24, 250, 164, 39, 121, 155, 197, 132, 218, 56, 102, 229, 187, 89, 7, |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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433 | 219, 133, 103, 57, 186, 228, 6, 88, 25, 71, 165, 251, 120, 38, 196, 154, |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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434 | 101, 59, 217, 135, 4, 90, 184, 230, 167, 249, 27, 69, 198, 152, 122, 36, |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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435 | 248, 166, 68, 26, 153, 199, 37, 123, 58, 100, 134, 216, 91, 5, 231, 185, |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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436 | 140, 210, 48, 110, 237, 179, 81, 15, 78, 16, 242, 172, 47, 113, 147, 205, |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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437 | 17, 79, 173, 243, 112, 46, 204, 146, 211, 141, 111, 49, 178, 236, 14, 80, |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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438 | 175, 241, 19, 77, 206, 144, 114, 44, 109, 51, 209, 143, 12, 82, 176, 238, |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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439 | 50, 108, 142, 208, 83, 13, 239, 177, 240, 174, 76, 18, 145, 207, 45, 115, |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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440 | 202, 148, 118, 40, 171, 245, 23, 73, 8, 86, 180, 234, 105, 55, 213, 139, |
1c9894662795
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441 | 87, 9, 235, 181, 54, 104, 138, 212, 149, 203, 41, 119, 244, 170, 72, 22, |
1c9894662795
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442 | 233, 183, 85, 11, 136, 214, 52, 106, 43, 117, 151, 201, 74, 20, 246, 168, |
1c9894662795
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443 | 116, 42, 200, 150, 21, 75, 169, 247, 182, 232, 10, 84, 215, 137, 107, 53 |
1c9894662795
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444 | }; |
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445 | |
1c9894662795
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446 | // |
1c9894662795
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447 | // Compute a Dallas Semiconductor 8 bit CRC. These show up in the ROM |
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448 | // and the registers. (note: this might better be done without to |
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449 | // table, it would probably be smaller and certainly fast enough |
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450 | // compared to all those delayMicrosecond() calls. But I got |
1c9894662795
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451 | // confused, so I use this table from the examples.) |
1c9894662795
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452 | // |
1c9894662795
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453 | uint8_t onewire_crc8(const uint8_t *data, uint8_t len) |
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454 | { |
1c9894662795
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455 | uint8_t crc = 0; |
1c9894662795
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456 | |
1c9894662795
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457 | while (len--) |
1c9894662795
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458 | crc = dscrc_table[crc ^ *data++]; |
1c9894662795
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459 | |
1c9894662795
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460 | return crc; |
1c9894662795
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461 | } |
1c9894662795
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462 | #else |
1c9894662795
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463 | // |
1c9894662795
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464 | // Compute a Dallas Semiconductor 8 bit CRC directly. |
1c9894662795
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465 | // this is much slower, but much smaller, than the lookup table. |
1c9894662795
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466 | // |
1c9894662795
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467 | uint8_t onewire_crc8(const uint8_t *data, uint8_t len) |
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468 | { |
1c9894662795
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469 | uint8_t crc = 0; |
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470 | |
1c9894662795
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471 | while (len--) |
1c9894662795
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472 | { |
1c9894662795
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473 | uint8_t inbyte = *data++; |
1c9894662795
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474 | for (int i = 8; i; i--) |
1c9894662795
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475 | { |
1c9894662795
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476 | uint8_t mix = (crc ^ inbyte) & 0x01; |
1c9894662795
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477 | crc >>= 1; |
1c9894662795
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478 | if (mix) |
1c9894662795
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479 | crc ^= 0x8C; |
1c9894662795
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480 | inbyte >>= 1; |
1c9894662795
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481 | } |
1c9894662795
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482 | } |
1c9894662795
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483 | return crc; |
1c9894662795
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484 | } |
1c9894662795
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485 | #endif |
1c9894662795
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486 | |
1c9894662795
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487 | // Compute the 1-Wire CRC16 and compare it against the received CRC. |
1c9894662795
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488 | // Example usage (reading a DS2408): |
1c9894662795
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489 | // // Put everything in a buffer so we can compute the CRC easily. |
1c9894662795
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490 | // uint8_t buf[13]; |
1c9894662795
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491 | // buf[0] = 0xF0; // Read PIO Registers |
1c9894662795
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492 | // buf[1] = 0x88; // LSB address |
1c9894662795
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493 | // buf[2] = 0x00; // MSB address |
1c9894662795
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494 | // WriteBytes(net, buf, 3); // Write 3 cmd bytes |
1c9894662795
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495 | // ReadBytes(net, buf+3, 10); // Read 6 data bytes, 2 0xFF, 2 CRC16 |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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496 | // if (!CheckCRC16(buf, 11, &buf[11])) { |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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497 | // // Handle error. |
1c9894662795
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498 | // } |
1c9894662795
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499 | // |
1c9894662795
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500 | // @param input - Array of bytes to checksum. |
1c9894662795
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501 | // @param len - How many bytes to use. |
1c9894662795
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502 | // @param inverted_crc - The two CRC16 bytes in the received data. |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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503 | // This should just point into the received data, |
1c9894662795
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504 | // *not* at a 16-bit integer. |
1c9894662795
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505 | // @param crc - The crc starting value (optional) |
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506 | // @return 1, iff the CRC matches. |
1c9894662795
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507 | bool onewire_check_crc16(const uint8_t* input, size_t len, const uint8_t* inverted_crc, uint16_t crc_iv) |
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508 | { |
1c9894662795
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509 | uint16_t crc = ~onewire_crc16(input, len, crc_iv); |
1c9894662795
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510 | return (crc & 0xFF) == inverted_crc[0] && (crc >> 8) == inverted_crc[1]; |
1c9894662795
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511 | } |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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512 | |
1c9894662795
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513 | // Compute a Dallas Semiconductor 16 bit CRC. This is required to check |
1c9894662795
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514 | // the integrity of data received from many 1-Wire devices. Note that the |
1c9894662795
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515 | // CRC computed here is *not* what you'll get from the 1-Wire network, |
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516 | // for two reasons: |
1c9894662795
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517 | // 1) The CRC is transmitted bitwise inverted. |
1c9894662795
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518 | // 2) Depending on the endian-ness of your processor, the binary |
1c9894662795
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519 | // representation of the two-byte return value may have a different |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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520 | // byte order than the two bytes you get from 1-Wire. |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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521 | // @param input - Array of bytes to checksum. |
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522 | // @param len - How many bytes to use. |
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523 | // @param crc - The crc starting value (optional) |
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524 | // @return The CRC16, as defined by Dallas Semiconductor. |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
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525 | uint16_t onewire_crc16(const uint8_t* input, size_t len, uint16_t crc_iv) |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
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526 | { |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
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527 | uint16_t crc = crc_iv; |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
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528 | static const uint8_t oddparity[16] = { 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0 }; |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
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529 | |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
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530 | uint16_t i; |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
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531 | for (i = 0; i < len; i++) |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
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532 | { |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
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533 | // Even though we're just copying a byte from the input, |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
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534 | // we'll be doing 16-bit computation with it. |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
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535 | uint16_t cdata = input[i]; |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
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536 | cdata = (cdata ^ crc) & 0xff; |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
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537 | crc >>= 8; |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
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538 | |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
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539 | if (oddparity[cdata & 0x0F] ^ oddparity[cdata >> 4]) |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
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540 | crc ^= 0xC001; |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
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541 | |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
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542 | cdata <<= 6; |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
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changeset
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543 | crc ^= cdata; |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
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544 | cdata <<= 1; |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
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545 | crc ^= cdata; |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
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546 | } |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
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547 | return crc; |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
Michiel Broek <mbroek@mbse.eu>
parents:
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548 | } |