--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main/task_temp.c Mon Apr 17 16:20:58 2023 +0200
@@ -0,0 +1,91 @@
+/**
+ * @file task_temp.c
+ * @brief The FreeRTOS task to query the temperature sensor.
+ */
+
+
+#include "config.h"
+
+
+static const char *TAG = "task_temp";
+
+SemaphoreHandle_t xSemaphoreTEMP = NULL; ///< Semaphore TEMP task
+EventGroupHandle_t xEventGroupTEMP; ///< Events TEMP task
+TEMP_State *temp_state; ///< Public state for other tasks
+
+const int TASK_TEMP_REQUEST_DONE = BIT0; ///< All requests are done.
+const int TASK_TEMP_REQUEST_TEMP = BIT1; ///< Request Temperature and Barometer
+
+
+
+void request_temp(void)
+{
+ xEventGroupClearBits(xEventGroupTEMP, TASK_TEMP_REQUEST_DONE);
+ xEventGroupSetBits(xEventGroupTEMP, TASK_TEMP_REQUEST_TEMP);
+}
+
+
+
+bool ready_temp(void)
+{
+ if (xEventGroupGetBits(xEventGroupTEMP) & TASK_TEMP_REQUEST_DONE)
+ return true;
+ return false;
+}
+
+
+/*
+ * Task to read the chip temperature sensor on request.
+ */
+void task_temp(void *pvParameter)
+{
+ float tsens_value;
+ int error = 0;
+
+ ESP_LOGI(TAG, "Starting task temperature");
+ temp_state = malloc(sizeof(TEMP_State));
+
+ temp_state->valid = false;
+ temp_state->error = TEMP_ERR_NONE;
+
+ temperature_sensor_handle_t temp_sensor = NULL;
+ temperature_sensor_config_t temp_sensor_config = TEMPERATURE_SENSOR_CONFIG_DEFAULT(-10, 80);
+ ESP_ERROR_CHECK(temperature_sensor_install(&temp_sensor_config, &temp_sensor));
+
+ /* event handler and event group for this task */
+ xEventGroupTEMP = xEventGroupCreate();
+ EventBits_t uxBits;
+
+ /*
+ * Task loop forever.
+ */
+ while (1) {
+
+ uxBits = xEventGroupWaitBits(xEventGroupTEMP, TASK_TEMP_REQUEST_TEMP, pdFALSE, pdFALSE, portMAX_DELAY );
+ if (uxBits & TASK_TEMP_REQUEST_TEMP) {
+
+ ESP_ERROR_CHECK(temperature_sensor_enable(temp_sensor));
+ error = temperature_sensor_get_celsius(temp_sensor, &tsens_value);
+ ESP_ERROR_CHECK(temperature_sensor_disable(temp_sensor));
+
+ if (xSemaphoreTake(xSemaphoreTEMP, 25) == pdTRUE) {
+ if (error == ESP_OK) {
+ temp_state->error = TEMP_ERR_NONE;
+ temp_state->valid = true;
+ temp_state->temperature = tsens_value;
+ } else {
+ temp_state->error = TEMP_ERR_READ;
+ temp_state->valid = false;
+ temp_state->temperature = 0;
+ }
+ xSemaphoreGive(xSemaphoreTEMP);
+ }
+
+ xEventGroupClearBits(xEventGroupTEMP, TASK_TEMP_REQUEST_TEMP);
+ xEventGroupSetBits(xEventGroupTEMP, TASK_TEMP_REQUEST_DONE);
+#if 0
+ ESP_LOGI(TAG, " TEMP: %.3f C, error: %d", temp_state->temperature, temp_state->error);
+#endif
+ }
+ }
+}