Sun, 16 Apr 2023 12:27:12 +0200
Preparations for BLE GATT. Added extra time after INA219 is powered on before measurement. Reduced LEDC frequency to 60 Hz, that makes the LED lights less nervous. Hardware mod on output 4, now needs external pulldown resistor.
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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
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2 | * Copyright (c) 2022 Ruslan V. Uss <unclerus@gmail.com> |
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3 | * |
1c9894662795
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4 | * Redistribution and use in source and binary forms, with or without |
1c9894662795
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5 | * modification, are permitted provided that the following conditions are met: |
1c9894662795
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6 | * |
1c9894662795
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7 | * 1. Redistributions of source code must retain the above copyright notice, |
1c9894662795
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8 | * this list of conditions and the following disclaimer. |
1c9894662795
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9 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
1c9894662795
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10 | * this list of conditions and the following disclaimer in the documentation |
1c9894662795
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11 | * and/or other materials provided with the distribution. |
1c9894662795
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12 | * 3. Neither the name of the copyright holder nor the names of itscontributors |
1c9894662795
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13 | * may be used to endorse or promote products derived from this software without |
1c9894662795
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14 | * specific prior written permission. |
1c9894662795
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15 | * |
1c9894662795
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16 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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17 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
1c9894662795
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18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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19 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
1c9894662795
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20 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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21 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
1c9894662795
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22 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
1c9894662795
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23 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
1c9894662795
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24 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
1c9894662795
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25 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
1c9894662795
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26 | */ |
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27 | |
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28 | /** |
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29 | * @file max31855.h |
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30 | * @defgroup max31855 max31855 |
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31 | * @{ |
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32 | * |
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33 | * ESP-IDF driver for MAX31855 cold-junction compensated |
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34 | * thermocouple-to-digital converter |
1c9894662795
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35 | * |
1c9894662795
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36 | * Copyright (c) 2022 Ruslan V. Uss <unclerus@gmail.com> |
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37 | * |
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38 | * BSD Licensed as described in the file LICENSE |
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39 | */ |
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40 | #ifndef __MAX31855_H__ |
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41 | #define __MAX31855_H__ |
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42 | |
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43 | #include <stdint.h> |
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44 | #include <stdbool.h> |
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45 | #include <driver/spi_master.h> |
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46 | #include <driver/gpio.h> |
1c9894662795
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47 | #include <esp_err.h> |
1c9894662795
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48 | |
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49 | #ifdef __cplusplus |
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50 | extern "C" { |
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51 | #endif |
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52 | |
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53 | #define MAX31855_MAX_CLOCK_SPEED_HZ (5000000) // 5 MHz |
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54 | |
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55 | /** |
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56 | * Device descriptor |
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57 | */ |
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58 | typedef struct |
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59 | { |
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60 | spi_device_interface_config_t spi_cfg; /**< SPI device configuration */ |
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61 | spi_device_handle_t spi_dev; /**< SPI device handler */ |
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62 | } max31855_t; |
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63 | |
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64 | /** |
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65 | * @brief Initialize device descriptor |
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66 | * |
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67 | * @param dev Device descriptor |
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68 | * @param host SPI host |
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69 | * @param cs_pin CS GPIO number |
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70 | * @param clock_speed_hz SPI clock speed, Hz |
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71 | * @return `ESP_OK` on success |
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72 | */ |
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73 | esp_err_t max31855_init_desc(max31855_t *dev, spi_host_device_t host, uint32_t clock_speed_hz, gpio_num_t cs_pin); |
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74 | |
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75 | /** |
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76 | * @brief Free device descriptor |
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77 | * |
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78 | * @param dev Device descriptor |
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79 | * @return `ESP_OK` on success |
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80 | */ |
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81 | esp_err_t max31855_free_desc(max31855_t *dev); |
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82 | |
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83 | /** |
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84 | * @brief Read temperatures and sensor status |
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85 | * |
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86 | * @param dev Device descriptor |
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87 | * @param[out] tc_t Thermocouple temperature, degrees Celsius |
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88 | * @param[out] cj_t Cold junction temperature, degrees Celsius (NULL-able) |
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89 | * @param[out] scv true when the thermocouple is short-circuited to VCC |
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90 | * @param[out] scg true when the thermocouple is short-circuited to GND |
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91 | * @param[out] oc true when the thermocouple is open (no connections) |
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92 | * @return |
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93 | */ |
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94 | esp_err_t max31855_get_temperature(max31855_t *dev, float *tc_t, float *cj_t, bool *scv, bool *scg, bool *oc); |
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95 | |
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96 | #ifdef __cplusplus |
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97 | } |
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98 | #endif |
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99 | |
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100 | /**@}*/ |
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101 | |
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102 | #endif /* __MAX31855_H__ */ |