main/task_ina219.h

Sun, 16 Apr 2023 12:27:12 +0200

author
Michiel Broek <mbroek@mbse.eu>
date
Sun, 16 Apr 2023 12:27:12 +0200
changeset 30
7448b8dd4288
parent 6
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permissions
-rw-r--r--

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.

3
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1 /**
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2 * @file task_ina219.h
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3 * @brief The FreeRTOS task to query the INA219 sensors connected to
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4 * the I2C bus.
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5 * The task will update the sensor state structures.
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6 */
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8 #ifndef _TASK_INA219_H
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9 #define _TASK_INA219_H
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11 /*
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12 * Error codes in this task
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13 */
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14 #define INA219_ERR_NONE 0 ///< No errors
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15 #define INA219_ERR_READ 1
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17 #define I_MAX_LOOPS 32
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18 #define I_MAX_CURRENT 5 ///< Max 5 Ampere
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19 #define I_SHUNT_RESISTOR_MILLI_OHM 100 ///< Shunt value
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22 typedef struct {
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23 bool valid; ///< Valid measurement
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24 bool fake; ///< Fake measurement
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25 uint8_t address; ///< Device i2c address
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26 float shunt; ///< Shunt voltage
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27 float volts; ///< Bus voltage
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28 float current; ///< Current mA
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29 int error; ///< Error result
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30 } INA219_tt;
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33 /**
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34 * @brief Structure containing the variables for the INA219 task.
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35 */
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36 typedef struct {
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37 bool valid; ///< Valid measurement
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38 bool fake; ///< Fake measurement
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39 INA219_tt Battery; ///< Battery measurement
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40 INA219_tt Solar; ///< Solar measurement
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41 int error; ///< Error result
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42 } INA219_State;
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46 /**
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47 * @brief Request a new measurement from selected sensors.
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48 */
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49 void request_ina219(void);
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52 /**
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53 * @brief Check if results are ready
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54 * @return true of results are ready, else false.
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55 */
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56 bool ready_ina219(void);
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59 /**
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60 * @brief The FreeRTOS task to update the INA219 on request.
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61 * @param pvParameters Parameters for the task.
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62 */
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63 void task_ina219(void *pvParameters);
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66 #endif
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67

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