comparison: main/task_temp.c
main/task_temp.c
- changeset 32
- 84e54b14e7db
equal
deleted
inserted
replaced
| 31:ec5c7794dcd6 | 32:84e54b14e7db |
|---|---|
| 1 /** | |
| 2 * @file task_temp.c | |
| 3 * @brief The FreeRTOS task to query the temperature sensor. | |
| 4 */ | |
| 5 | |
| 6 | |
| 7 #include "config.h" | |
| 8 | |
| 9 | |
| 10 static const char *TAG = "task_temp"; | |
| 11 | |
| 12 SemaphoreHandle_t xSemaphoreTEMP = NULL; ///< Semaphore TEMP task | |
| 13 EventGroupHandle_t xEventGroupTEMP; ///< Events TEMP task | |
| 14 TEMP_State *temp_state; ///< Public state for other tasks | |
| 15 | |
| 16 const int TASK_TEMP_REQUEST_DONE = BIT0; ///< All requests are done. | |
| 17 const int TASK_TEMP_REQUEST_TEMP = BIT1; ///< Request Temperature and Barometer | |
| 18 | |
| 19 | |
| 20 | |
| 21 void request_temp(void) | |
| 22 { | |
| 23 xEventGroupClearBits(xEventGroupTEMP, TASK_TEMP_REQUEST_DONE); | |
| 24 xEventGroupSetBits(xEventGroupTEMP, TASK_TEMP_REQUEST_TEMP); | |
| 25 } | |
| 26 | |
| 27 | |
| 28 | |
| 29 bool ready_temp(void) | |
| 30 { | |
| 31 if (xEventGroupGetBits(xEventGroupTEMP) & TASK_TEMP_REQUEST_DONE) | |
| 32 return true; | |
| 33 return false; | |
| 34 } | |
| 35 | |
| 36 | |
| 37 /* | |
| 38 * Task to read the chip temperature sensor on request. | |
| 39 */ | |
| 40 void task_temp(void *pvParameter) | |
| 41 { | |
| 42 float tsens_value; | |
| 43 int error = 0; | |
| 44 | |
| 45 ESP_LOGI(TAG, "Starting task temperature"); | |
| 46 temp_state = malloc(sizeof(TEMP_State)); | |
| 47 | |
| 48 temp_state->valid = false; | |
| 49 temp_state->error = TEMP_ERR_NONE; | |
| 50 | |
| 51 temperature_sensor_handle_t temp_sensor = NULL; | |
| 52 temperature_sensor_config_t temp_sensor_config = TEMPERATURE_SENSOR_CONFIG_DEFAULT(-10, 80); | |
| 53 ESP_ERROR_CHECK(temperature_sensor_install(&temp_sensor_config, &temp_sensor)); | |
| 54 | |
| 55 /* event handler and event group for this task */ | |
| 56 xEventGroupTEMP = xEventGroupCreate(); | |
| 57 EventBits_t uxBits; | |
| 58 | |
| 59 /* | |
| 60 * Task loop forever. | |
| 61 */ | |
| 62 while (1) { | |
| 63 | |
| 64 uxBits = xEventGroupWaitBits(xEventGroupTEMP, TASK_TEMP_REQUEST_TEMP, pdFALSE, pdFALSE, portMAX_DELAY ); | |
| 65 if (uxBits & TASK_TEMP_REQUEST_TEMP) { | |
| 66 | |
| 67 ESP_ERROR_CHECK(temperature_sensor_enable(temp_sensor)); | |
| 68 error = temperature_sensor_get_celsius(temp_sensor, &tsens_value); | |
| 69 ESP_ERROR_CHECK(temperature_sensor_disable(temp_sensor)); | |
| 70 | |
| 71 if (xSemaphoreTake(xSemaphoreTEMP, 25) == pdTRUE) { | |
| 72 if (error == ESP_OK) { | |
| 73 temp_state->error = TEMP_ERR_NONE; | |
| 74 temp_state->valid = true; | |
| 75 temp_state->temperature = tsens_value; | |
| 76 } else { | |
| 77 temp_state->error = TEMP_ERR_READ; | |
| 78 temp_state->valid = false; | |
| 79 temp_state->temperature = 0; | |
| 80 } | |
| 81 xSemaphoreGive(xSemaphoreTEMP); | |
| 82 } | |
| 83 | |
| 84 xEventGroupClearBits(xEventGroupTEMP, TASK_TEMP_REQUEST_TEMP); | |
| 85 xEventGroupSetBits(xEventGroupTEMP, TASK_TEMP_REQUEST_DONE); | |
| 86 #if 0 | |
| 87 ESP_LOGI(TAG, " TEMP: %.3f C, error: %d", temp_state->temperature, temp_state->error); | |
| 88 #endif | |
| 89 } | |
| 90 } | |
| 91 } |
