comparison: main/task_ds18b20.h
main/task_ds18b20.h
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| 1 | |
| 2 /** | |
| 3 * @file task_ds18b20.h | |
| 4 * @brief The FreeRTOS task to query the DS18B20 sensors on one or two | |
| 5 * one-wire busses. Each bus must have only one sensor. That way | |
| 6 * we don't need to care about the DS18B20 internal ROM address. | |
| 7 * The task will update the DS18B20_State structure. | |
| 8 * | |
| 9 * Using a compile setting with make menuconfig it is possible to compile | |
| 10 * a simulator instead of real hardware sensors. The simulator includes | |
| 11 * fake kettles so that the temperature actually changes with the | |
| 12 * activation of the kettle Solid State Relays. Only usefull for developers. | |
| 13 */ | |
| 14 | |
| 15 #ifndef _TASK_DS18B20_H | |
| 16 #define _TASK_DS18B20_H | |
| 17 | |
| 18 /* | |
| 19 * Error codes in this task | |
| 20 */ | |
| 21 #define DS18B20_ERR_NONE 0 | |
| 22 #define DS18B20_ERR_NOSENSOR 1 | |
| 23 #define DS18B20_ERR_TOOMANY 2 | |
| 24 #define DS18B20_ERR_CRC 3 | |
| 25 #define DS18B20_ERR_READ 4 | |
| 26 | |
| 27 | |
| 28 /** | |
| 29 * @brief Structure containing the variables for the DS18B20 task. | |
| 30 */ | |
| 31 typedef struct { | |
| 32 bool mlt_valid; ///< MLT sensor valid reading. | |
| 33 double mlt_temperature; ///< Current MLT temperature. | |
| 34 int mlt_error; ///< MLT error number. | |
| 35 bool hlt_valid; ///< HLT sensor valid reading. | |
| 36 double hlt_temperature; ///< Current HLT temperature. | |
| 37 int hlt_error; ///< HLT error number. | |
| 38 } DS18B20_State; | |
| 39 | |
| 40 | |
| 41 /** | |
| 42 * @brief The FreeRTOS task to update the DS18B20 temperature sensors. | |
| 43 */ | |
| 44 void task_ds18b20(void *); | |
| 45 | |
| 46 | |
| 47 #endif | |
| 48 |
